├── .gitignore
├── .hindent.yaml
├── src
    ├── listings
    │   ├── yesod-demo
    │   │   ├── templates
    │   │   │   ├── homepage.julius
    │   │   │   ├── homepage.lucius
    │   │   │   ├── default-layout.lucius
    │   │   │   ├── homepage.hamlet
    │   │   │   ├── article.hamlet
    │   │   │   ├── article.lucius
    │   │   │   ├── article-with-form.lucius
    │   │   │   ├── article-with-form.hamlet
    │   │   │   ├── default-layout.hamlet
    │   │   │   └── default-layout-wrapper.hamlet
    │   │   ├── config
    │   │   │   ├── test-settings.yml
    │   │   │   ├── robots.txt
    │   │   │   ├── favicon.ico
    │   │   │   ├── routes
    │   │   │   ├── settings.yml
    │   │   │   └── keter.yml
    │   │   ├── test
    │   │   │   ├── Spec.hs
    │   │   │   ├── Handler
    │   │   │   │   └── CommonSpec.hs
    │   │   │   └── TestImport.hs
    │   │   ├── app
    │   │   │   ├── main.hs
    │   │   │   ├── devel.hs
    │   │   │   └── DevelMain.hs
    │   │   ├── src
    │   │   │   ├── Import.hs
    │   │   │   ├── Import
    │   │   │   │   └── NoFoundation.hs
    │   │   │   ├── Article.hs
    │   │   │   ├── Handler
    │   │   │   │   ├── Common.hs
    │   │   │   │   └── Home.hs
    │   │   │   ├── Settings
    │   │   │   │   └── StaticFiles.hs
    │   │   │   ├── Settings.hs
    │   │   │   ├── Application.hs
    │   │   │   └── Foundation.hs
    │   │   ├── static
    │   │   │   └── fonts
    │   │   │   │   ├── glyphicons-halflings-regular.eot
    │   │   │   │   ├── glyphicons-halflings-regular.ttf
    │   │   │   │   ├── glyphicons-halflings-regular.woff
    │   │   │   │   └── glyphicons-halflings-regular.svg
    │   │   ├── .gitignore
    │   │   ├── README.md
    │   │   ├── stack.yaml
    │   │   └── package.yaml
    │   ├── airship-demo
    │   │   ├── .gitignore
    │   │   ├── Setup.hs
    │   │   ├── ChangeLog.md
    │   │   ├── airship-demo.cabal
    │   │   ├── src
    │   │   │   └── Main.hs
    │   │   └── LICENSE
    │   └── scotty-demo
    │   │   ├── Setup.hs
    │   │   ├── .gitignore
    │   │   ├── scotty-demo.cabal
    │   │   ├── stack.yaml
    │   │   ├── src
    │   │       └── Scotty.hs
    │   │   └── LICENSE
    ├── brain.png
    ├── haskell.png
    ├── tokens.jpeg
    ├── mpowered.png
    ├── mwa-logo.png
    ├── notes.tex
    ├── yesod-form.png
    ├── yesod-home.png
    ├── lucid-hello.png
    ├── yesod-article.png
    ├── customizations.tex
    └── slides.md
├── slides
    ├── slides.pdf
    └── slides-handouts.pdf
├── README.md
├── Makefile
└── outline.org


/.gitignore:
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1 | target
2 | 


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/.hindent.yaml:
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1 | indent-size: 2
2 | line-length: 60
3 | 


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/src/listings/yesod-demo/templates/homepage.julius:
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1 | 


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/src/listings/yesod-demo/templates/homepage.lucius:
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1 | 


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/src/listings/airship-demo/.gitignore:
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1 | dist-newstyle
2 | 


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/src/listings/yesod-demo/config/test-settings.yml:
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1 | {}
2 | 


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/src/listings/yesod-demo/templates/default-layout.lucius:
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1 | 


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/src/listings/yesod-demo/config/robots.txt:
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1 | User-agent: *
2 | 


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/src/listings/airship-demo/Setup.hs:
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1 | import Distribution.Simple
2 | main = defaultMain
3 | 


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/src/listings/scotty-demo/Setup.hs:
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1 | import Distribution.Simple
2 | main = defaultMain
3 | 


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/src/listings/yesod-demo/test/Spec.hs:
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1 | {-# OPTIONS_GHC -F -pgmF hspec-discover #-}
2 | 


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/src/brain.png:
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https://raw.githubusercontent.com/owickstrom/fast-and-fearless-evolution-of-server-side-webapps/HEAD/src/brain.png


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/src/haskell.png:
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https://raw.githubusercontent.com/owickstrom/fast-and-fearless-evolution-of-server-side-webapps/HEAD/src/haskell.png


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/src/tokens.jpeg:
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https://raw.githubusercontent.com/owickstrom/fast-and-fearless-evolution-of-server-side-webapps/HEAD/src/tokens.jpeg


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/slides/slides.pdf:
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https://raw.githubusercontent.com/owickstrom/fast-and-fearless-evolution-of-server-side-webapps/HEAD/slides/slides.pdf


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/src/mpowered.png:
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https://raw.githubusercontent.com/owickstrom/fast-and-fearless-evolution-of-server-side-webapps/HEAD/src/mpowered.png


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/src/mwa-logo.png:
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https://raw.githubusercontent.com/owickstrom/fast-and-fearless-evolution-of-server-side-webapps/HEAD/src/mwa-logo.png


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/src/notes.tex:
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1 | \setbeameroption{show notes on second screen}
2 | \setbeamertemplate{note page}{\pagecolor{yellow!8}\insertnote}
3 | 


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/src/yesod-form.png:
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https://raw.githubusercontent.com/owickstrom/fast-and-fearless-evolution-of-server-side-webapps/HEAD/src/yesod-form.png


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/src/yesod-home.png:
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https://raw.githubusercontent.com/owickstrom/fast-and-fearless-evolution-of-server-side-webapps/HEAD/src/yesod-home.png


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/src/listings/yesod-demo/app/main.hs:
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1 | import Prelude     (IO)
2 | import Application (appMain)
3 | 
4 | main :: IO ()
5 | main = appMain
6 | 


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/src/lucid-hello.png:
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https://raw.githubusercontent.com/owickstrom/fast-and-fearless-evolution-of-server-side-webapps/HEAD/src/lucid-hello.png


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/src/yesod-article.png:
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https://raw.githubusercontent.com/owickstrom/fast-and-fearless-evolution-of-server-side-webapps/HEAD/src/yesod-article.png


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/src/listings/scotty-demo/.gitignore:
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1 | .cabal-sandbox
2 | cabal.sandbox.config
3 | dist
4 | dist-newstyle
5 | cabal.project.local
6 | .stack-work
7 | 


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/slides/slides-handouts.pdf:
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https://raw.githubusercontent.com/owickstrom/fast-and-fearless-evolution-of-server-side-webapps/HEAD/slides/slides-handouts.pdf


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/src/listings/airship-demo/ChangeLog.md:
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1 | # Revision history for airship-demo
2 | 
3 | ## 0.1.0.0  -- YYYY-mm-dd
4 | 
5 | * First version. Released on an unsuspecting world.
6 | 


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/src/listings/yesod-demo/config/favicon.ico:
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https://raw.githubusercontent.com/owickstrom/fast-and-fearless-evolution-of-server-side-webapps/HEAD/src/listings/yesod-demo/config/favicon.ico


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/src/listings/yesod-demo/app/devel.hs:
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1 | {-# LANGUAGE PackageImports #-}
2 | import "yesod-demo" Application (develMain)
3 | import Prelude (IO)
4 | 
5 | main :: IO ()
6 | main = develMain
7 | 


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/src/listings/yesod-demo/src/Import.hs:
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1 | module Import
2 |     ( module Import
3 |     ) where
4 | 
5 | import Foundation            as Import
6 | import Import.NoFoundation   as Import
7 | 


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/src/listings/yesod-demo/templates/homepage.hamlet:
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1 | <h1>My Blog
2 | <ul>
3 |   $forall article <- articles
4 |     <li>
5 |       <a href=@{ArticleR (articleId article)}>#{articleTitle article}
6 | 


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/src/listings/yesod-demo/static/fonts/glyphicons-halflings-regular.eot:
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/src/listings/yesod-demo/static/fonts/glyphicons-halflings-regular.ttf:
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/src/listings/yesod-demo/static/fonts/glyphicons-halflings-regular.woff:
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/src/listings/yesod-demo/templates/article.hamlet:
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 1 | <h1>#{articleTitle article}
 2 | <p>#{articleContent article}
 3 | 
 4 | <div .comments>
 5 |   <h2>Comments
 6 |   <ul>
 7 |     $forall comment <- comments
 8 |       <li .comment>
 9 |         <span .author>#{commentAuthor comment}
10 |         <span .content>#{commentContents comment}
11 | 


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/src/listings/yesod-demo/templates/article.lucius:
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 1 | .comments {
 2 |   margin-top: 3em;
 3 | }
 4 | .comments ul {
 5 |   list-style-type: none;
 6 |   padding: 0;
 7 | }
 8 | .comment {
 9 |   background: #eee;
10 |   padding: .5em;
11 |   margin-bottom: 1em;
12 | }
13 | .author {
14 |   font-weight: bold;
15 | }
16 | .author:after {
17 |   content: ':';
18 | }
19 | 


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/src/listings/yesod-demo/.gitignore:
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 1 | dist*
 2 | static/tmp/
 3 | static/combined/
 4 | config/client_session_key.aes
 5 | *.hi
 6 | *.o
 7 | *.sqlite3
 8 | *.sqlite3-shm
 9 | *.sqlite3-wal
10 | .hsenv*
11 | cabal-dev/
12 | .stack-work/
13 | yesod-devel/
14 | .cabal-sandbox
15 | cabal.sandbox.config
16 | .DS_Store
17 | *.swp
18 | *.keter
19 | *~
20 | \#*
21 | yesod-demo.cabal
22 | 


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/src/listings/yesod-demo/src/Import/NoFoundation.hs:
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 1 | {-# LANGUAGE CPP #-}
 2 | module Import.NoFoundation
 3 |     ( module Import
 4 |     ) where
 5 | 
 6 | import ClassyPrelude.Yesod   as Import
 7 | import Settings              as Import
 8 | import Settings.StaticFiles  as Import
 9 | import Yesod.Core.Types      as Import (loggerSet)
10 | import Yesod.Default.Config2 as Import
11 | 


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/src/listings/yesod-demo/templates/article-with-form.lucius:
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 1 | .comments, .new-comment {
 2 |   margin-top: 3em;
 3 | }
 4 | .comments ul {
 5 |   list-style-type: none;
 6 |   padding: 0;
 7 | }
 8 | .comment {
 9 |   background: #eee;
10 |   padding: .5em;
11 |   margin-bottom: 1em;
12 | }
13 | .author {
14 |   font-weight: bold;
15 | }
16 | .author:after {
17 |   content: ':';
18 | }
19 | 


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/src/listings/yesod-demo/test/Handler/CommonSpec.hs:
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 1 | module Handler.CommonSpec (spec) where
 2 | 
 3 | import TestImport
 4 | 
 5 | spec :: Spec
 6 | spec = withApp $ do
 7 |     describe "robots.txt" $ do
 8 |         it "gives a 200" $ do
 9 |             get RobotsR
10 |             statusIs 200
11 |         it "has correct User-agent" $ do
12 |             get RobotsR
13 |             bodyContains "User-agent: *"
14 |     describe "favicon.ico" $ do
15 |         it "gives a 200" $ do
16 |             get FaviconR
17 |             statusIs 200
18 | 


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/src/listings/yesod-demo/config/routes:
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 1 | -- By default this file is used by `parseRoutesFile` in Foundation.hs
 2 | -- Syntax for this file here: https://www.yesodweb.com/book/routing-and-handlers
 3 | 
 4 | /static StaticR Static appStatic
 5 | 
 6 | /favicon.ico FaviconR GET
 7 | /robots.txt RobotsR GET
 8 | 
 9 | -- start snippet routes
10 | / HomeR GET
11 | 
12 | /articles/#ArticleId ArticleR GET
13 | -- end snippet routes
14 | 
15 | -- start snippet routes-2
16 | /articles/#ArticleId/comments ArticleCommentsR POST
17 | -- end snippet routes-2
18 | 
19 | /articles/#ArticleId/with-form ArticleWithFormR GET
20 | 


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/src/listings/yesod-demo/templates/article-with-form.hamlet:
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 1 | <h1>#{articleTitle article}
 2 | <p>#{articleContent article}
 3 | 
 4 | <div .comments>
 5 |   <h2>Comments
 6 |   <ul>
 7 |     $forall comment <- comments
 8 |       <li .comment>
 9 |         <span .author>#{commentAuthor comment}
10 |         <span .content>#{commentContents comment}
11 | 
12 | $# start snippet new-comment
13 | <div .new-comment>
14 |   <h3>Add Comment
15 |   <form role=form
16 |         method=post
17 |         action=@{ArticleCommentsR id'}
18 |         enctype=#{commentFormEnc}>
19 |    ^{commentFormWidget}
20 |    <button type="submit" .btn .btn-default>Submit
21 | $# end snippet new-comment
22 | 


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/src/listings/yesod-demo/src/Article.hs:
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 1 | {-# LANGUAGE GeneralizedNewtypeDeriving #-}
 2 | module Article where
 3 | 
 4 | import           Import.NoFoundation
 5 | 
 6 | import qualified Data.Text           as T
 7 | 
 8 | newtype ArticleId =
 9 |   ArticleId Text
10 |   deriving (Show, Read, Eq, Ord, Hashable)
11 | 
12 | instance PathPiece ArticleId where
13 |   toPathPiece (ArticleId t) = t
14 |   fromPathPiece t
15 |     | not (T.null t) = Just (ArticleId t)
16 |     | otherwise = Nothing
17 | 
18 | data Article = Article
19 |   { articleId :: ArticleId
20 |   , articleTitle :: Text
21 |   , articleContent :: Text
22 |   }
23 | 
24 | data Comment = Comment
25 |   { commentAuthor :: Text
26 |   , commentContents :: Text
27 |   }
28 | 


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/README.md:
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 1 | # Fast and Fearless Evolution of Server-Side Web Applications
 2 | 
 3 | [Slides](slides/slides-handouts.pdf) and [code examples](src/listings/) for the
 4 | talk.
 5 | 
 6 | ## Blog Post
 7 | 
 8 | The non-code parts of the talk, i.e. the motivation for choosing certain web
 9 | technologies, is written up as [a blog
10 | post](https://wickstrom.tech/programming/2017/12/18/fast-and-fearless-evolution-of-server-side-web-applications.html).
11 | 
12 | ## License
13 | 
14 | Code examples under `src/listings/`, and the theme and build configuration, are
15 | all licensed under [Mozilla Public License Version
16 | 2.0](https://www.mozilla.org/en-US/MPL/2.0/).
17 | 
18 | The contents of the slides are "All rights reserved" licensed.
19 | 
20 | Copyright 2017 Oskar Wickström
21 | 


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/src/listings/scotty-demo/scotty-demo.cabal:
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 1 | name:                scotty-demo
 2 | version:             0.1.0.0
 3 | synopsis:            Code listings in slides
 4 | license:             MPL-2.0
 5 | license-file:        LICENSE
 6 | author:              Oskar Wickström
 7 | maintainer:          oskar.wickstrom@gmail.com
 8 | copyright:           Oskar Wickström
 9 | build-type:          Simple
10 | cabal-version:       >=1.10
11 | 
12 | library
13 |   hs-source-dirs:      src
14 |   default-language:    Haskell2010
15 |   exposed-modules:     Scotty
16 |   build-depends:       base >= 4.7 && < 5
17 |                      , lucid
18 |                      , scotty
19 |                      , bytestring
20 |                      , text
21 |   ghc-options: -Werror -Wall -fwarn-tabs
22 | 


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/src/listings/yesod-demo/src/Handler/Common.hs:
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 1 | {-# LANGUAGE NoImplicitPrelude #-}
 2 | {-# LANGUAGE OverloadedStrings #-}
 3 | {-# LANGUAGE TemplateHaskell #-}
 4 | {-# LANGUAGE MultiParamTypeClasses #-}
 5 | {-# LANGUAGE TypeFamilies #-}
 6 | -- | Common handler functions.
 7 | module Handler.Common where
 8 | 
 9 | import Data.FileEmbed (embedFile)
10 | import Import
11 | 
12 | -- These handlers embed files in the executable at compile time to avoid a
13 | -- runtime dependency, and for efficiency.
14 | 
15 | getFaviconR :: Handler TypedContent
16 | getFaviconR = do cacheSeconds $ 60 * 60 * 24 * 30 -- cache for a month
17 |                  return $ TypedContent "image/x-icon"
18 |                         $ toContent $(embedFile "config/favicon.ico")
19 | 
20 | getRobotsR :: Handler TypedContent
21 | getRobotsR = return $ TypedContent typePlain
22 |                     $ toContent $(embedFile "config/robots.txt")
23 | 


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/src/listings/yesod-demo/src/Settings/StaticFiles.hs:
--------------------------------------------------------------------------------
 1 | {-# LANGUAGE NoImplicitPrelude #-}
 2 | {-# LANGUAGE OverloadedStrings #-}
 3 | {-# LANGUAGE TemplateHaskell   #-}
 4 | module Settings.StaticFiles where
 5 | 
 6 | import Settings     (appStaticDir, compileTimeAppSettings)
 7 | import Yesod.Static (staticFiles)
 8 | 
 9 | -- This generates easy references to files in the static directory at compile time,
10 | -- giving you compile-time verification that referenced files exist.
11 | -- Warning: any files added to your static directory during run-time can't be
12 | -- accessed this way. You'll have to use their FilePath or URL to access them.
13 | --
14 | -- For example, to refer to @static/js/script.js@ via an identifier, you'd use:
15 | --
16 | --     js_script_js
17 | --
18 | -- If the identifier is not available, you may use:
19 | --
20 | --     StaticFile ["js", "script.js"] []
21 | staticFiles (appStaticDir compileTimeAppSettings)
22 | 


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/src/listings/yesod-demo/test/TestImport.hs:
--------------------------------------------------------------------------------
 1 | {-# LANGUAGE QuasiQuotes #-}
 2 | {-# LANGUAGE NoImplicitPrelude #-}
 3 | {-# LANGUAGE OverloadedStrings #-}
 4 | module TestImport
 5 |     ( module TestImport
 6 |     , module X
 7 |     ) where
 8 | 
 9 | import Application           (makeFoundation, makeLogWare)
10 | import ClassyPrelude         as X hiding (Handler)
11 | import Foundation            as X
12 | import Test.Hspec            as X
13 | import Yesod.Default.Config2 (useEnv, loadYamlSettings)
14 | import Yesod.Test            as X
15 | import Yesod.Core.Unsafe     (fakeHandlerGetLogger)
16 | 
17 | runHandler :: Handler a -> YesodExample App a
18 | runHandler handler = do
19 |     app <- getTestYesod
20 |     fakeHandlerGetLogger appLogger app handler
21 | 
22 | 
23 | withApp :: SpecWith (TestApp App) -> Spec
24 | withApp = before $ do
25 |     settings <- loadYamlSettings
26 |         ["config/test-settings.yml", "config/settings.yml"]
27 |         []
28 |         useEnv
29 |     foundation <- makeFoundation settings
30 |     logWare <- liftIO $ makeLogWare foundation
31 |     return (foundation, logWare)
32 | 


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/src/listings/airship-demo/airship-demo.cabal:
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 1 | -- Initial airship-demo.cabal generated by cabal init.  For further
 2 | -- documentation, see http://haskell.org/cabal/users-guide/
 3 | 
 4 | name:                airship-demo
 5 | version:             0.1.0.0
 6 | -- synopsis:
 7 | -- description:
 8 | license:             MPL-2.0
 9 | license-file:        LICENSE
10 | author:              Oskar Wickström
11 | maintainer:          oskar.wickstrom@gmail.com
12 | -- copyright:
13 | category:            Web
14 | build-type:          Simple
15 | extra-source-files:  ChangeLog.md
16 | cabal-version:       >=1.10
17 | 
18 | executable airship-demo
19 |   main-is:             Main.hs
20 |   -- other-modules:
21 |   -- other-extensions:
22 |   build-depends:       base >=4.9 && <4.10
23 |                      , airship
24 |                      , binary
25 |                      , containers
26 |                      , unordered-containers
27 |                      , http-types
28 |                      , microlens
29 |                      , text
30 |                      , text-binary
31 |                      , wai
32 |                      , warp
33 |   hs-source-dirs:      src
34 |   default-language:    Haskell2010
35 | 


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/src/listings/yesod-demo/config/settings.yml:
--------------------------------------------------------------------------------
 1 | # Values formatted like "_env:ENV_VAR_NAME:default_value" can be overridden by the specified environment variable.
 2 | # See https://github.com/yesodweb/yesod/wiki/Configuration#overriding-configuration-values-with-environment-variables
 3 | 
 4 | static-dir:     "_env:STATIC_DIR:static"
 5 | host:           "_env:HOST:*4" # any IPv4 host
 6 | port:           "_env:PORT:3000" # NB: The port `yesod devel` uses is distinct from this value. Set the `yesod devel` port from the command line.
 7 | ip-from-header: "_env:IP_FROM_HEADER:false"
 8 | 
 9 | # Default behavior: determine the application root from the request headers.
10 | # Uncomment to set an explicit approot
11 | #approot:        "_env:APPROOT:http://localhost:3000"
12 | 
13 | # By default, `yesod devel` runs in development, and built executables use
14 | # production settings (see below). To override this, use the following:
15 | #
16 | # development: false
17 | 
18 | # Optional values with the following production defaults.
19 | # In development, they default to the inverse.
20 | #
21 | # development: false
22 | # detailed-logging: false
23 | # should-log-all: false
24 | # reload-templates: false
25 | # mutable-static: false
26 | # skip-combining: false
27 | 
28 | copyright: Oskar Wickström
29 | #analytics: UA-YOURCODE
30 | 


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/src/listings/yesod-demo/templates/default-layout.hamlet:
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 1 | 
 2 | <!-- Static navbar -->
 3 | <nav .navbar.navbar-default.navbar-static-top>
 4 |     <div .container>
 5 |         <div .navbar-header>
 6 |             <button type="button" .navbar-toggle.collapsed data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
 7 |                 <span class="sr-only">Toggle navigation</span>
 8 |                 <span class="icon-bar"></span>
 9 |                 <span class="icon-bar"></span>
10 |                 <span class="icon-bar"></span>
11 | 
12 |         <div #navbar .collapse.navbar-collapse>
13 |             <ul .nav.navbar-nav>
14 |                 $forall MenuItem label route _ <- navbarLeftFilteredMenuItems
15 |                     <li :Just route == mcurrentRoute:.active>
16 |                         <a href="@{route}">#{label}
17 | 
18 |             <ul .nav.navbar-nav.navbar-right>
19 |                 $forall MenuItem label route _ <- navbarRightFilteredMenuItems
20 |                     <li :Just route == mcurrentRoute:.active>
21 |                         <a href="@{route}">#{label}
22 | 
23 | <!-- Page Contents -->
24 | 
25 | <div .container>
26 |     $maybe msg <- mmsg
27 |       <div .alert.alert-info #message>#{msg}
28 | 
29 | 
30 | <div .container>
31 |     <div .row>
32 |         <div .col-md-12>
33 |             ^{widget}
34 | 


--------------------------------------------------------------------------------
/Makefile:
--------------------------------------------------------------------------------
 1 | TEX=pdflatex
 2 | 
 3 | MASTER=src/master.tex
 4 | TEX_OPTIONS=options.tex
 5 | SRCS=$(shell find src -name '*.tex') \
 6 |      $(shell find src -name '*.bib') \
 7 | 		 $(shell find src/listings) \
 8 | 		 src/slides.tex
 9 | IMGS=$(shell find src -name '*.png')
10 | 
11 | HS_SRCS=$(shell find src/listings/scotty-demo -name '*.hs') \
12 | 				src/listings/scotty-demo/scotty-demo.cabal \
13 | 				src/listings/scotty-demo/stack.yaml
14 | 
15 | PANDOC_FLAGS= -t beamer \
16 | 		-f markdown+multiline_tables \
17 | 						 -s \
18 | 						 -H src/customizations.tex \
19 | 						 -Vurlcolor=linkcolor \
20 | 						 --highlight-style=haddock \
21 | 						 --slide-level=2 \
22 | 						 --filter pandoc-include-code \
23 | 						 -fmarkdown-implicit_figures \
24 | 
25 | SLIDES_DIR=target/slides
26 | SLIDES=$(SLIDES_DIR)/slides.pdf
27 | 
28 | SLIDES_NO_NOTES_DIR=target/slides-no-notes
29 | SLIDES_NO_NOTES=$(SLIDES_NO_NOTES_DIR)/slides-no-notes.pdf
30 | 
31 | .PHONY: all
32 | all: slides programs
33 | 
34 | .PHONY: slides
35 | slides: $(SLIDES) $(SLIDES_NO_NOTES)
36 | 
37 | target/slides.tex: src/slides.md src/customizations.tex src/notes.tex $(HS_SRCS) $(IMGS)
38 | 	mkdir -p target
39 | 	pandoc $(PANDOC_FLAGS) \
40 | 		-H src/notes.tex \
41 | 		$< \
42 | 		-o $@
43 | 
44 | target/slides-no-notes.tex: src/slides.md src/customizations.tex
45 | 	mkdir -p target
46 | 	pandoc $(PANDOC_FLAGS) -V classoption=handout $< -o $@
47 | 
48 | $(SLIDES): target/slides.tex
49 | 	rm -rf $(SLIDES_DIR)
50 | 	mkdir -p $(SLIDES_DIR)
51 | 	cp target/slides.tex $(SLIDES_DIR)/slides.tex
52 | 	cd $(SLIDES_DIR) && \
53 | 		$(TEX) \
54 | 		-jobname slides \
55 | 		-halt-on-error \
56 | 		slides.tex
57 | 
58 | $(SLIDES_NO_NOTES): target/slides-no-notes.tex
59 | 	rm -rf $(SLIDES_NO_NOTES_DIR)
60 | 	mkdir -p $(SLIDES_NO_NOTES_DIR)
61 | 	cp target/slides-no-notes.tex $(SLIDES_NO_NOTES_DIR)/slides.tex
62 | 	cd $(SLIDES_NO_NOTES_DIR) && \
63 | 		$(TEX) \
64 | 		-jobname slides-no-notes \
65 | 		-halt-on-error \
66 | 		slides.tex
67 | 
68 | programs:
69 | 	cd src/listings/scotty-demo && cabal new-build
70 | 	cd src/listings/yesod-demo && stack build
71 | 	cd src/listings/airship-demo && cabal new-build
72 | 
73 | clean:
74 | 	rm -rf target
75 | 


--------------------------------------------------------------------------------
/src/listings/yesod-demo/README.md:
--------------------------------------------------------------------------------
 1 | ## Haskell Setup
 2 | 
 3 | 1. If you haven't already, [install Stack](https://haskell-lang.org/get-started)
 4 | 	* On POSIX systems, this is usually `curl -sSL https://get.haskellstack.org/ | sh`
 5 | 2. Install the `yesod` command line tool: `stack install yesod-bin --install-ghc`
 6 | 3. Build libraries: `stack build`
 7 | 
 8 | If you have trouble, refer to the [Yesod Quickstart guide](https://www.yesodweb.com/page/quickstart) for additional detail.
 9 | 
10 | ## Development
11 | 
12 | Start a development server with:
13 | 
14 | ```
15 | stack exec -- yesod devel
16 | ```
17 | 
18 | As your code changes, your site will be automatically be recompiled and redeployed to localhost.
19 | 
20 | ## Tests
21 | 
22 | ```
23 | stack test --flag yesod-demo:library-only --flag yesod-demo:dev
24 | ```
25 | 
26 | (Because `yesod devel` passes the `library-only` and `dev` flags, matching those flags means you don't need to recompile between tests and development, and it disables optimization to speed up your test compile times).
27 | 
28 | ## Documentation
29 | 
30 | * Read the [Yesod Book](https://www.yesodweb.com/book) online for free
31 | * Check [Stackage](http://stackage.org/) for documentation on the packages in your LTS Haskell version, or [search it using Hoogle](https://www.stackage.org/lts/hoogle?q=). Tip: Your LTS version is in your `stack.yaml` file.
32 | * For local documentation, use:
33 | 	* `stack haddock --open` to generate Haddock documentation for your dependencies, and open that documentation in a browser
34 | 	* `stack hoogle <function, module or type signature>` to generate a Hoogle database and search for your query
35 | * The [Yesod cookbook](https://github.com/yesodweb/yesod-cookbook) has sample code for various needs
36 | 
37 | ## Getting Help
38 | 
39 | * Ask questions on [Stack Overflow, using the Yesod or Haskell tags](https://stackoverflow.com/questions/tagged/yesod+haskell)
40 | * Ask the [Yesod Google Group](https://groups.google.com/forum/#!forum/yesodweb)
41 | * There are several chatrooms you can ask for help:
42 | 	* For IRC, try Freenode#yesod and Freenode#haskell
43 | 	* [Functional Programming Slack](https://fpchat-invite.herokuapp.com/), in the #haskell, #haskell-beginners, or #yesod channels.
44 | 


--------------------------------------------------------------------------------
/src/listings/yesod-demo/config/keter.yml:
--------------------------------------------------------------------------------
 1 | # After you've edited this file, remove the following line to allow
 2 | # `yesod keter` to build your bundle.
 3 | user-edited: false
 4 | 
 5 | # A Keter app is composed of 1 or more stanzas. The main stanza will define our
 6 | # web application. See the Keter documentation for more information on
 7 | # available stanzas.
 8 | stanzas:
 9 | 
10 |   # Your Yesod application.
11 |   - type: webapp
12 | 
13 |     # Name of your executable. You are unlikely to need to change this.
14 |     # Note that all file paths are relative to the keter.yml file.
15 |     #
16 |     # The path given is for Stack projects. If you're still using cabal, change
17 |     # to
18 |     # exec: ../dist/build/yesod-demo/yesod-demo
19 |     exec: ../dist/bin/yesod-demo
20 | 
21 |     # Command line options passed to your application.
22 |     args: []
23 | 
24 |     hosts:
25 |       # You can specify one or more hostnames for your application to respond
26 |       # to. The primary hostname will be used for generating your application
27 |       # root.
28 |       - www.yesod-demo.com
29 | 
30 |     # Enable to force Keter to redirect to https
31 |     # Can be added to any stanza
32 |     requires-secure: false
33 | 
34 |   # Static files.
35 |   - type: static-files
36 |     hosts:
37 |       - static.yesod-demo.com
38 |     root: ../static
39 | 
40 |     # Uncomment to turn on directory listings.
41 |     # directory-listing: true
42 | 
43 |   # Redirect plain domain name to www.
44 |   - type: redirect
45 | 
46 |     hosts:
47 |       - yesod-demo.com
48 |     actions:
49 |       - host: www.yesod-demo.com
50 |         # secure: false
51 |         # port: 80
52 | 
53 |     # Uncomment to switch to a non-permanent redirect.
54 |     # status: 303
55 | 
56 | # Use the following to automatically copy your bundle upon creation via `yesod
57 | # keter`. Uses `scp` internally, so you can set it to a remote destination
58 | # copy-to: user@host:/opt/keter/incoming/
59 | 
60 | # You can pass arguments to `scp` used above. This example limits bandwidth to
61 | # 1024 Kbit/s and uses port 2222 instead of the default 22
62 | # copy-to-args:
63 | #   - "-l 1024"
64 | #   - "-P 2222"
65 | 
66 | # If you would like to have Keter automatically create a PostgreSQL database
67 | # and set appropriate environment variables for it to be discovered, uncomment
68 | # the following line.
69 | # plugins:
70 | #   postgres: true
71 | 


--------------------------------------------------------------------------------
/outline.org:
--------------------------------------------------------------------------------
 1 | #+TITLE: Fast and Fearless Evolution of Server-Side Web Applications
 2 | 
 3 | * Abstract
 4 | 
 5 | When evolving web applications, in most programming languages and
 6 | frameworks, we risk introducing programming errors. Undefined values,
 7 | parsing failures, broken links, invalid markup, and good old null
 8 | pointers, are all things that can break our applications. Manually
 9 | writing and maintaining tests to catch programming errors is a time
10 | consuming effort, and we would rather spend that time testing our
11 | application logic. This talk takes you on a whirlwind tour of mature
12 | technologies that offer static guarantees for modern web applications.
13 | 
14 | * Key Points
15 | 
16 | - Introduction
17 |   - Reasons for change
18 |     - New features
19 |     - Bug fixes
20 |     - Refactorings
21 |     - External factors (regulation, deprecations)
22 |   - Deadlines
23 |   - Risk
24 |     - Delay
25 |     - Error
26 |     - Burnout
27 |   - Fast feedback!
28 | - Web applications
29 |   - Many of us work with them
30 |   - The buzz: SPAs and frameworks
31 |     - More like desktop apps
32 |     - Reinventing the browser
33 |     - No JS, no page
34 |   - Server-side apps
35 |     - Progressive enhancement
36 |     - 80/20 rule
37 |   - "Isomorphic" webapps
38 |   - PJAX
39 |   - Newer /= Better
40 |   - Static Typing for Server-side web
41 |     - Compile-time guarantees
42 |     - Safely evolvable code
43 |     - Focus your tests on your domain
44 |     - (Examples of functional statically typed language web frameworks)
45 | - Haskell Web Applications
46 |   - WAI
47 |     - Interface
48 |     - Streaming
49 |     - Middleware
50 |   - Warp
51 |     - Web server
52 |     - Fast
53 |   - Frameworks/libraries
54 |     - Scotty
55 |       - Compare to Sinatra?
56 |       - Build-your-own-setup
57 |     - Yesod
58 |       - Routing
59 |       - Templates
60 |       - Forms
61 |       - Persistent
62 |       - Widgets
63 |         - TypeScript
64 |     - (Happstack, Snap)
65 |     - Airship
66 |     - Servant
67 |     - MFlow
68 |   - Libraries
69 |     - Markup
70 |       - Blaze HTML
71 |       - Lucid
72 |     - CSS
73 |       - Lucius
74 |       - Cassius
75 |       - Clay
76 |     - Amazonka
77 |   - Deployment
78 |     - Heroku/Halcyon
79 |     - AWS Elastic Beanstalk + Docker
80 |     - Others?
81 | - If you need client-side code
82 |   - Elm, PureScript, GHCJS
83 |   - Servant
84 |   - purescript-bridge
85 | 


--------------------------------------------------------------------------------
/src/listings/scotty-demo/stack.yaml:
--------------------------------------------------------------------------------
 1 | # This file was automatically generated by 'stack init'
 2 | #
 3 | # Some commonly used options have been documented as comments in this file.
 4 | # For advanced use and comprehensive documentation of the format, please see:
 5 | # https://docs.haskellstack.org/en/stable/yaml_configuration/
 6 | 
 7 | # Resolver to choose a 'specific' stackage snapshot or a compiler version.
 8 | # A snapshot resolver dictates the compiler version and the set of packages
 9 | # to be used for project dependencies. For example:
10 | #
11 | # resolver: lts-3.5
12 | # resolver: nightly-2015-09-21
13 | # resolver: ghc-7.10.2
14 | # resolver: ghcjs-0.1.0_ghc-7.10.2
15 | # resolver:
16 | #  name: custom-snapshot
17 | #  location: "./custom-snapshot.yaml"
18 | resolver: lts-9.11
19 | 
20 | # User packages to be built.
21 | # Various formats can be used as shown in the example below.
22 | #
23 | # packages:
24 | # - some-directory
25 | # - https://example.com/foo/bar/baz-0.0.2.tar.gz
26 | # - location:
27 | #    git: https://github.com/commercialhaskell/stack.git
28 | #    commit: e7b331f14bcffb8367cd58fbfc8b40ec7642100a
29 | # - location: https://github.com/commercialhaskell/stack/commit/e7b331f14bcffb8367cd58fbfc8b40ec7642100a
30 | #   extra-dep: true
31 | #  subdirs:
32 | #  - auto-update
33 | #  - wai
34 | #
35 | # A package marked 'extra-dep: true' will only be built if demanded by a
36 | # non-dependency (i.e. a user package), and its test suites and benchmarks
37 | # will not be run. This is useful for tweaking upstream packages.
38 | packages:
39 | - .
40 | # Dependency packages to be pulled from upstream that are not in the resolver
41 | # (e.g., acme-missiles-0.3)
42 | extra-deps: []
43 | 
44 | # Override default flag values for local packages and extra-deps
45 | flags: {}
46 | 
47 | # Extra package databases containing global packages
48 | extra-package-dbs: []
49 | 
50 | # Control whether we use the GHC we find on the path
51 | # system-ghc: true
52 | #
53 | # Require a specific version of stack, using version ranges
54 | # require-stack-version: -any # Default
55 | # require-stack-version: ">=1.5"
56 | #
57 | # Override the architecture used by stack, especially useful on Windows
58 | # arch: i386
59 | # arch: x86_64
60 | #
61 | # Extra directories used by stack for building
62 | # extra-include-dirs: [/path/to/dir]
63 | # extra-lib-dirs: [/path/to/dir]
64 | #
65 | # Allow a newer minor version of GHC than the snapshot specifies
66 | # compiler-check: newer-minor


--------------------------------------------------------------------------------
/src/listings/yesod-demo/stack.yaml:
--------------------------------------------------------------------------------
 1 | # This file was automatically generated by 'stack init'
 2 | #
 3 | # Some commonly used options have been documented as comments in this file.
 4 | # For advanced use and comprehensive documentation of the format, please see:
 5 | # https://docs.haskellstack.org/en/stable/yaml_configuration/
 6 | 
 7 | # Resolver to choose a 'specific' stackage snapshot or a compiler version.
 8 | # A snapshot resolver dictates the compiler version and the set of packages
 9 | # to be used for project dependencies. For example:
10 | #
11 | # resolver: lts-3.5
12 | # resolver: nightly-2015-09-21
13 | # resolver: ghc-7.10.2
14 | # resolver: ghcjs-0.1.0_ghc-7.10.2
15 | # resolver:
16 | #  name: custom-snapshot
17 | #  location: "./custom-snapshot.yaml"
18 | resolver: lts-9.17
19 | 
20 | # User packages to be built.
21 | # Various formats can be used as shown in the example below.
22 | #
23 | # packages:
24 | # - some-directory
25 | # - https://example.com/foo/bar/baz-0.0.2.tar.gz
26 | # - location:
27 | #    git: https://github.com/commercialhaskell/stack.git
28 | #    commit: e7b331f14bcffb8367cd58fbfc8b40ec7642100a
29 | # - location: https://github.com/commercialhaskell/stack/commit/e7b331f14bcffb8367cd58fbfc8b40ec7642100a
30 | #   extra-dep: true
31 | #  subdirs:
32 | #  - auto-update
33 | #  - wai
34 | #
35 | # A package marked 'extra-dep: true' will only be built if demanded by a
36 | # non-dependency (i.e. a user package), and its test suites and benchmarks
37 | # will not be run. This is useful for tweaking upstream packages.
38 | packages:
39 | - .
40 | # Dependency packages to be pulled from upstream that are not in the resolver
41 | # (e.g., acme-missiles-0.3)
42 | extra-deps: []
43 | 
44 | # Override default flag values for local packages and extra-deps
45 | flags: {}
46 | 
47 | # Extra package databases containing global packages
48 | extra-package-dbs: []
49 | 
50 | # Control whether we use the GHC we find on the path
51 | # system-ghc: true
52 | #
53 | # Require a specific version of stack, using version ranges
54 | # require-stack-version: -any # Default
55 | # require-stack-version: ">=1.5"
56 | #
57 | # Override the architecture used by stack, especially useful on Windows
58 | # arch: i386
59 | # arch: x86_64
60 | #
61 | # Extra directories used by stack for building
62 | # extra-include-dirs: [/path/to/dir]
63 | # extra-lib-dirs: [/path/to/dir]
64 | #
65 | # Allow a newer minor version of GHC than the snapshot specifies
66 | # compiler-check: newer-minor


--------------------------------------------------------------------------------
/src/listings/yesod-demo/package.yaml:
--------------------------------------------------------------------------------
  1 | name:    yesod-demo
  2 | version: "0.0.0"
  3 | 
  4 | dependencies:
  5 | 
  6 | # Due to a bug in GHC 8.0.1, we block its usage
  7 | # See: https://ghc.haskell.org/trac/ghc/ticket/12130
  8 | - base >=4.8.2.0 && <4.9 || >=4.9.1.0 && <5
  9 | 
 10 | # version 1.0 had a bug in reexporting Handler, causing trouble
 11 | - classy-prelude-yesod >=0.10.2 && <1.0 || >=1.1
 12 | 
 13 | - yesod >=1.4.3 && <1.5
 14 | - yesod-core >=1.4.30 && <1.5
 15 | - yesod-static >=1.4.0.3 && <1.6
 16 | - yesod-form >=1.4.0 && <1.5
 17 | - classy-prelude >=0.10.2
 18 | - classy-prelude-conduit >=0.10.2
 19 | - bytestring >=0.9 && <0.11
 20 | - text >=0.11 && <2.0
 21 | - template-haskell
 22 | - shakespeare >=2.0 && <2.1
 23 | - hjsmin >=0.1 && <0.3
 24 | - monad-control >=0.3 && <1.1
 25 | - wai-extra >=3.0 && <3.1
 26 | - yaml >=0.8 && <0.9
 27 | - http-conduit >=2.1 && <2.3
 28 | - directory >=1.1 && <1.4
 29 | - warp >=3.0 && <3.3
 30 | - data-default
 31 | - aeson >=0.6 && <1.3
 32 | - conduit >=1.0 && <2.0
 33 | - monad-logger >=0.3 && <0.4
 34 | - fast-logger >=2.2 && <2.5
 35 | - wai-logger >=2.2 && <2.4
 36 | - foreign-store
 37 | - file-embed
 38 | - safe
 39 | - unordered-containers
 40 | - containers
 41 | - vector
 42 | - time
 43 | - case-insensitive
 44 | - wai
 45 | - blaze-markup
 46 | - blaze-html
 47 | 
 48 | # The library contains all of our application code. The executable
 49 | # defined below is just a thin wrapper.
 50 | library:
 51 |   source-dirs: src
 52 |   when:
 53 |   - condition: (flag(dev)) || (flag(library-only))
 54 |     then:
 55 |       ghc-options:
 56 |       - -Wall
 57 |       - -fwarn-tabs
 58 |       - -O0
 59 |       cpp-options: -DDEVELOPMENT
 60 |     else:
 61 |       ghc-options:
 62 |       - -Wall
 63 |       - -fwarn-tabs
 64 |       - -O2
 65 | 
 66 | # Runnable executable for our application
 67 | executables:
 68 |   yesod-demo:
 69 |     main: main.hs
 70 |     source-dirs: app
 71 |     ghc-options:
 72 |     - -threaded
 73 |     - -rtsopts
 74 |     - -with-rtsopts=-N
 75 |     dependencies:
 76 |     - yesod-demo
 77 |     when:
 78 |     - condition: flag(library-only)
 79 |       buildable: false
 80 | 
 81 | # Test suite
 82 | tests:
 83 |   test:
 84 |     main: Spec.hs
 85 |     source-dirs: test
 86 |     ghc-options: -Wall
 87 |     dependencies:
 88 |     - yesod-demo
 89 |     - hspec >=2.0.0
 90 |     - yesod-test
 91 | 
 92 | # Define flags used by "yesod devel" to make compilation faster
 93 | flags:
 94 |   library-only:
 95 |     description: Build for use with "yesod devel"
 96 |     manual: false
 97 |     default: false
 98 |   dev:
 99 |     description: Turn on development settings, like auto-reload templates.
100 |     manual: false
101 |     default: false
102 | 


--------------------------------------------------------------------------------
/src/listings/scotty-demo/src/Scotty.hs:
--------------------------------------------------------------------------------
 1 | {-# LANGUAGE OverloadedStrings #-}
 2 | module Scotty where
 3 | 
 4 | import Control.Monad.IO.Class
 5 | import Data.Semigroup
 6 | import Data.Text.Lazy
 7 | import Web.Scotty
 8 | import Lucid
 9 | 
10 | -- start snippet app
11 | app :: ScottyM ()
12 | app = do
13 | 
14 |   get "/" $
15 |     html "Welcome!"
16 | 
17 |   get "/greet/:who" $ do
18 |     who <- param "who"
19 |     html ("Hello, " <> who <> "!")
20 | -- end snippet app
21 |   messyHtml
22 |   lucidHandler
23 |   articleHandler
24 | 
25 | -- start snippet lucid-template
26 | homeView :: Text -> Html ()
27 | homeView who =
28 |   html_ [lang_ "en"] $ do
29 |     head_ $ do
30 |       meta_ [charset_ "UTF-8"]
31 |       title_ "My Page"
32 |       link_ [rel_ "stylesheet", href_ bootstrapCss]
33 | 
34 |     body_ $
35 |       div_ [class_ "jumbotron"] $
36 |         h1_ ("Hello, " <> toHtml who <> "!")
37 | -- end snippet lucid-template
38 |   where
39 |     bootstrapCss = "https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css"
40 | 
41 | lucidHandler :: ScottyM ()
42 | lucidHandler =
43 | -- start snippet lucid-handler
44 |   get "/greet-with-lucid/:who" $ do
45 |     who <- param "who"
46 |     html (renderText (homeView who))
47 | -- end snippet lucid-handler
48 | 
49 | -- start snippet addNewComment
50 | type ArticleId = Text
51 | 
52 | addNewComment :: ArticleId -> Text -> IO ()
53 | --- end snippet addNewComment
54 | addNewComment _ _ = return () -- only for slides
55 | 
56 | articleHandler :: ScottyM ()
57 | articleHandler =
58 |   -- start snippet article-handler
59 |   post "/articles/:article-id/comments" $ do
60 |     articleId <- param "article-id"
61 |     -- accepts a form or query parameter "comment"
62 |     comment <- param "comment"
63 |     liftIO (addNewComment articleId comment)
64 |     redirect ("/articles/" <> articleId)
65 |   -- end snippet article-handler
66 | 
67 | -- start snippet main
68 | main :: IO ()
69 | main = scotty 8080 app
70 | -- end snippet main
71 | 
72 | messyHtml :: ScottyM ()
73 | messyHtml = do
74 |   let bootstrapCss = "https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css"
75 | 
76 |   get "/greet-with-template/:who" $ do
77 |     who <- param "who"
78 |     html $
79 |          "<!DOCTYPE html>\
80 |          \<html lang=\"en\">\
81 |          \<head>\
82 |          \  <meta charset=\"UTF-8\">\
83 |          \  <title>My Page</title>\
84 |          \  <link rel=\"stylesheet\"\
85 |          \        href=\"" <> bootstrapCss <> "\">\
86 |          \</head>\
87 |          \<body>\
88 |          \  <div class=\"jumbotron\">\
89 |          \     <h1>Hello, " <> who <> "!</h1>\
90 |          \  </div>\
91 |          \</body>\
92 |          \</html>\
93 |          \"
94 | 
95 | 
96 | 


--------------------------------------------------------------------------------
/src/listings/yesod-demo/templates/default-layout-wrapper.hamlet:
--------------------------------------------------------------------------------
 1 | $newline never
 2 | \<!doctype html>
 3 | \<!--[if lt IE 7]> <html class="no-js ie6 oldie" lang="en"> <![endif]-->
 4 | \<!--[if IE 7]>    <html class="no-js ie7 oldie" lang="en"> <![endif]-->
 5 | \<!--[if IE 8]>    <html class="no-js ie8 oldie" lang="en"> <![endif]-->
 6 | \<!--[if gt IE 8]><!-->
 7 | <html class="no-js" lang="en"> <!--<![endif]-->
 8 |   <head>
 9 |     <meta charset="UTF-8">
10 | 
11 |     <title>#{pageTitle pc}
12 |     <meta name="description" content="">
13 |     <meta name="author" content="">
14 | 
15 |     <meta name="viewport" content="width=device-width,initial-scale=1">
16 | 
17 |     ^{pageHead pc}
18 | 
19 |     \<!--[if lt IE 9]>
20 |     \<script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>
21 |     \<![endif]-->
22 |     <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.4/jquery.js">
23 |     <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/js-cookie/2.0.3/js.cookie.min.js">
24 | 
25 |     \<!-- Bootstrap-3.3.7 compiled and minified JavaScript -->
26 |     <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous">
27 | 
28 |     <script>
29 |       /* The `defaultCsrfMiddleware` Middleware added in Foundation.hs adds a CSRF token to the request cookies. */
30 |       /* AJAX requests should add that token to a header to be validated by the server. */
31 |       /* See the CSRF documentation in the Yesod.Core.Handler module of the yesod-core package for details. */
32 |       var csrfHeaderName = "#{TE.decodeUtf8 $ CI.foldedCase defaultCsrfHeaderName}";
33 | 
34 |       var csrfCookieName = "#{TE.decodeUtf8 defaultCsrfCookieName}";
35 |       var csrfToken = Cookies.get(csrfCookieName);
36 | 
37 | 
38 |       if (csrfToken) {
39 |       \  $.ajaxPrefilter(function( options, originalOptions, jqXHR ) {
40 |       \      if (!options.crossDomain) {
41 |       \          jqXHR.setRequestHeader(csrfHeaderName, csrfToken);
42 |       \      }
43 |       \  });
44 |       }
45 | 
46 |     <script>
47 |       document.documentElement.className = document.documentElement.className.replace(/\bno-js\b/,'js');
48 |   <body>
49 |     ^{pageBody pc}
50 | 
51 |     $maybe analytics <- appAnalytics $ appSettings master
52 |       <script>
53 |         if(!window.location.href.match(/localhost/)){
54 |             (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
55 |             (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
56 |             m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
57 |             })(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
58 | 
59 |             ga('create', '#{analytics}', 'auto');
60 |             ga('send', 'pageview');
61 |         }
62 | 


--------------------------------------------------------------------------------
/src/listings/airship-demo/src/Main.hs:
--------------------------------------------------------------------------------
  1 | {-# LANGUAGE OverloadedStrings #-}
  2 | module Main where
  3 | 
  4 | import           Airship
  5 | import           Airship.Resource.Static
  6 | import           Data.Binary.Builder      (fromByteString)
  7 | import qualified Data.HashMap.Strict      as HM
  8 | import qualified Data.Map.Strict          as M
  9 | import           Data.Text                (Text)
 10 | import qualified Data.Text                as T
 11 | import qualified Data.Text.Encoding       as TE
 12 | import           Lens.Micro
 13 | import qualified Network.HTTP.Types       as HTTP
 14 | import           Network.Wai.Handler.Warp (defaultSettings, runSettings,
 15 |                                            setHost, setPort)
 16 | 
 17 | data Article = Article { articleTitle :: Text, articleContents :: Text }
 18 | 
 19 | routingParam :: Monad m => Text -> Webmachine m Text
 20 | routingParam t = do
 21 |   p <- params
 22 |   return (p HM.! t)
 23 | 
 24 | textResponse = ResponseBuilder . fromByteString . TE.encodeUtf8
 25 | 
 26 | -- Bogus implementation.
 27 | getArticle :: Text -> Webmachine IO (Maybe Article)
 28 | getArticle _ =
 29 |   return $
 30 |     Just Article
 31 |     { articleTitle = "Airship Webmachines!"
 32 |     , articleContents = "Lorem ipsum..."
 33 |     }
 34 | 
 35 | -- Bogus implementation.
 36 | articleExists :: Text -> Webmachine IO Bool
 37 | articleExists _ = return True
 38 | 
 39 | renderArticle :: Article -> Text
 40 | renderArticle article =
 41 |   mconcat
 42 |   [ "<h1>"
 43 |   , articleTitle article
 44 |   , "</h1>"
 45 |   , "<p>"
 46 |   , articleContents article
 47 |   , "</p>"
 48 |   ]
 49 | 
 50 | response404 = escapedResponse "Not found!"
 51 | 
 52 | articleResource :: Resource IO
 53 | articleResource =
 54 |   defaultResource
 55 |   {
 56 | -- start snippet allowedMethods
 57 |     allowedMethods =
 58 |       return [HTTP.methodGet, HTTP.methodHead, HTTP.methodPost]
 59 | -- end snippet allowedMethods
 60 | -- start snippet resourceExists
 61 |   , resourceExists =
 62 |       routingParam "articleId" >>= articleExists
 63 | -- end snippet resourceExists
 64 | -- start snippet contentTypesProvided
 65 |   , contentTypesProvided =
 66 |     let htmlResponse (Just article) =
 67 |           return (textResponse (renderArticle article))
 68 |         htmlResponse Nothing =
 69 |           return response404
 70 |     in return [("text/html", routingParam "articleId"
 71 |                              >>= getArticle
 72 |                              >>= htmlResponse)]
 73 | -- end snippet contentTypesProvided
 74 |   }
 75 | 
 76 | -- start snippet app-routes
 77 | appRoutes :: Resource IO -> RoutingSpec IO ()
 78 | appRoutes static = do
 79 |   "articles" </> var "articleId" #> articleResource
 80 |   "static"   </> star            #> static
 81 | -- end snippet app-routes
 82 | 
 83 | main :: IO ()
 84 | main = do
 85 |   static <- staticResource Cache "assets"
 86 |   let port = 3000
 87 |       host = "127.0.0.1"
 88 |       settings = setPort port (setHost host defaultSettings)
 89 |       routes = appRoutes static
 90 |       config =
 91 |         defaultAirshipConfig & includeTraceHeader .~
 92 |         OmitHeader &
 93 |         includeQuipHeader .~
 94 |         OmitHeader
 95 |   putStrLn "Listening on port 3000"
 96 |   runSettings settings (resourceToWai config routes errors)
 97 |   where
 98 |     errors =
 99 |       M.singleton
100 |         HTTP.status404
101 |         [("text/html", return response404)]
102 | 


--------------------------------------------------------------------------------
/src/listings/yesod-demo/src/Handler/Home.hs:
--------------------------------------------------------------------------------
  1 | {-# LANGUAGE MultiParamTypeClasses #-}
  2 | {-# LANGUAGE NoImplicitPrelude     #-}
  3 | {-# LANGUAGE OverloadedStrings     #-}
  4 | {-# LANGUAGE TemplateHaskell       #-}
  5 | {-# LANGUAGE TypeFamilies          #-}
  6 | 
  7 | module Handler.Home where
  8 | 
  9 | import           Import
 10 | 
 11 | import           Data.HashMap.Strict   as HM
 12 | import           qualified Text.Blaze.Html5      as Html
 13 | import           Yesod.Form.Bootstrap3
 14 | 
 15 | import           Article
 16 | 
 17 | allArticles :: Handler [Article]
 18 | allArticles =
 19 |   HM.elems . appArticles <$> getYesod
 20 | 
 21 | getArticle :: ArticleId -> Handler Article
 22 | getArticle id' = do
 23 |   articles <- appArticles <$> getYesod
 24 |   maybe notFound pure (HM.lookup id' articles)
 25 | 
 26 | getArticleComments :: ArticleId -> Handler [Comment]
 27 | getArticleComments id' = do
 28 |   postsVar <- appArticleComments <$> getYesod
 29 |   HM.lookupDefault [] id' <$> readMVar postsVar
 30 | 
 31 | addArticleComment :: ArticleId -> Comment -> Handler ()
 32 | addArticleComment id' comment = do
 33 |   postsVar <- appArticleComments <$> getYesod
 34 |   modifyMVar_ postsVar (return . HM.insertWith (<>) id' [comment])
 35 | 
 36 | -- start snippet get-home-handler
 37 | getHomeR :: Handler Html
 38 | getHomeR = do
 39 |   articles <- allArticles
 40 |   defaultLayout $ do
 41 |     setTitle "My Blog"
 42 |     $(widgetFile "homepage")
 43 | -- end snippet get-home-handler
 44 | 
 45 | -- start snippet comment-form
 46 | commentForm :: AForm Handler Comment
 47 | commentForm =
 48 |   Comment
 49 |   <$> areq textField (named "Name") Nothing
 50 |   <*> (unTextarea
 51 |        <$> areq textareaField (named "Comment") Nothing)
 52 | -- end snippet comment-form
 53 |   where
 54 |     named :: Text -> FieldSettings App
 55 |     named = bfs
 56 | 
 57 | renderForm :: FormRender Handler a
 58 | renderForm = renderBootstrap3 BootstrapBasicForm
 59 | 
 60 | -- start snippet get-article-handler
 61 | getArticleR :: ArticleId -> Handler Html
 62 | getArticleR id' = do
 63 |   article <- getArticle id'
 64 |   comments <- getArticleComments id'
 65 |   defaultLayout $ do
 66 |     setTitle (Html.text (articleTitle article))
 67 |     $(widgetFile "article")
 68 | -- end snippet get-article-handler
 69 | 
 70 | -- start snippet get-article-with-form-handler
 71 | getArticleWithFormR :: ArticleId -> Handler Html
 72 | getArticleWithFormR id' = do
 73 |   article <- getArticle id'
 74 |   comments <- getArticleComments id'
 75 | 
 76 |   (commentFormWidget, commentFormEnc) <-
 77 |     generateFormPost (renderForm commentForm)
 78 | 
 79 |   defaultLayout $ do
 80 |     setTitle (Html.text (articleTitle article))
 81 |     $(widgetFile "article-with-form")
 82 | -- end snippet get-article-with-form-handler
 83 | 
 84 | -- start snippet article-comment-handler
 85 | postArticleCommentsR :: ArticleId -> Handler Html
 86 | postArticleCommentsR id' = do
 87 |   article <- getArticle id'
 88 |   comments <- getArticleComments id'
 89 | 
 90 |   ((result, commentFormWidget), commentFormEnc) <-
 91 |     runFormPost (renderForm commentForm)
 92 | 
 93 |   case result of
 94 |     FormSuccess comment -> do
 95 |       addArticleComment id' comment
 96 |       redirect (ArticleWithFormR id')
 97 |     _ ->
 98 |       defaultLayout $ do
 99 |         setTitle (Html.text (articleTitle article))
100 |         $(widgetFile "article-with-form")
101 | -- end snippet article-comment-handler
102 | 


--------------------------------------------------------------------------------
/src/listings/yesod-demo/app/DevelMain.hs:
--------------------------------------------------------------------------------
  1 | -- | Running your app inside GHCi.
  2 | --
  3 | -- To start up GHCi for usage with Yesod, first make sure you are in dev mode:
  4 | --
  5 | -- > cabal configure -fdev
  6 | --
  7 | -- Note that @yesod devel@ automatically sets the dev flag.
  8 | -- Now launch the repl:
  9 | --
 10 | -- > cabal repl --ghc-options="-O0 -fobject-code"
 11 | --
 12 | -- To start your app, run:
 13 | --
 14 | -- > :l DevelMain
 15 | -- > DevelMain.update
 16 | --
 17 | -- You can also call @DevelMain.shutdown@ to stop the app
 18 | --
 19 | -- You will need to add the foreign-store package to your .cabal file.
 20 | -- It is very light-weight.
 21 | --
 22 | -- If you don't use cabal repl, you will need
 23 | -- to run the following in GHCi or to add it to
 24 | -- your .ghci file.
 25 | --
 26 | -- :set -DDEVELOPMENT
 27 | --
 28 | -- There is more information about this approach,
 29 | -- on the wiki: https://github.com/yesodweb/yesod/wiki/ghci
 30 | 
 31 | module DevelMain where
 32 | 
 33 | import Prelude
 34 | import Application (getApplicationRepl, shutdownApp)
 35 | 
 36 | import Control.Exception (finally)
 37 | import Control.Monad ((>=>))
 38 | import Control.Concurrent
 39 | import Data.IORef
 40 | import Foreign.Store
 41 | import Network.Wai.Handler.Warp
 42 | import GHC.Word
 43 | 
 44 | -- | Start or restart the server.
 45 | -- newStore is from foreign-store.
 46 | -- A Store holds onto some data across ghci reloads
 47 | update :: IO ()
 48 | update = do
 49 |     mtidStore <- lookupStore tidStoreNum
 50 |     case mtidStore of
 51 |       -- no server running
 52 |       Nothing -> do
 53 |           done <- storeAction doneStore newEmptyMVar
 54 |           tid <- start done
 55 |           _ <- storeAction (Store tidStoreNum) (newIORef tid)
 56 |           return ()
 57 |       -- server is already running
 58 |       Just tidStore -> restartAppInNewThread tidStore
 59 |   where
 60 |     doneStore :: Store (MVar ())
 61 |     doneStore = Store 0
 62 | 
 63 |     -- shut the server down with killThread and wait for the done signal
 64 |     restartAppInNewThread :: Store (IORef ThreadId) -> IO ()
 65 |     restartAppInNewThread tidStore = modifyStoredIORef tidStore $ \tid -> do
 66 |         killThread tid
 67 |         withStore doneStore takeMVar
 68 |         readStore doneStore >>= start
 69 | 
 70 | 
 71 |     -- | Start the server in a separate thread.
 72 |     start :: MVar () -- ^ Written to when the thread is killed.
 73 |           -> IO ThreadId
 74 |     start done = do
 75 |         (port, site, app) <- getApplicationRepl
 76 |         forkIO (finally (runSettings (setPort port defaultSettings) app)
 77 |                         -- Note that this implies concurrency
 78 |                         -- between shutdownApp and the next app that is starting.
 79 |                         -- Normally this should be fine
 80 |                         (putMVar done () >> shutdownApp site))
 81 | 
 82 | -- | kill the server
 83 | shutdown :: IO ()
 84 | shutdown = do
 85 |     mtidStore <- lookupStore tidStoreNum
 86 |     case mtidStore of
 87 |       -- no server running
 88 |       Nothing -> putStrLn "no Yesod app running"
 89 |       Just tidStore -> do
 90 |           withStore tidStore $ readIORef >=> killThread
 91 |           putStrLn "Yesod app is shutdown"
 92 | 
 93 | tidStoreNum :: Word32
 94 | tidStoreNum = 1
 95 | 
 96 | modifyStoredIORef :: Store (IORef a) -> (a -> IO a) -> IO ()
 97 | modifyStoredIORef store f = withStore store $ \ref -> do
 98 |     v <- readIORef ref
 99 |     f v >>= writeIORef ref
100 | 


--------------------------------------------------------------------------------
/src/customizations.tex:
--------------------------------------------------------------------------------
  1 | \usepackage{tikz}
  2 | \usetikzlibrary{shapes.geometric,arrows,positioning,fit,calc,shadows,backgrounds,arrows.meta}
  3 | \usepackage{setspace}
  4 | \setstretch{1.5}
  5 | 
  6 | \usepackage{adjustbox}
  7 | 
  8 | \definecolor{linkcolor}{HTML}{5200FF}
  9 | \definecolor{topbarcolor}{HTML}{E81C4F}
 10 | \definecolor{sectionbg}{HTML}{5200FF}
 11 | \definecolor{textcolor}{HTML}{111111}
 12 | \definecolor{darkgray}{HTML}{666666}
 13 | \definecolor{mediumgray}{HTML}{888888}
 14 | \definecolor{dimgray}{HTML}{BBBBBB}
 15 | 
 16 | \setbeamercolor{alerted text}{fg=black}
 17 | \setbeamerfont{alerted text}{series=\bfseries}
 18 | 
 19 | %\beamerdefaultoverlayspecification{<+->}
 20 | 
 21 | \usepackage{etoolbox}
 22 | \usepackage{pgfpages}
 23 | 
 24 | \usepackage[T1]{fontenc}
 25 | \usepackage[sfdefault,scaled=1]{FiraSans}
 26 | \usepackage{newtxsf}
 27 | \usepackage{FiraMono}
 28 | 
 29 | 
 30 | \usepackage{array}
 31 | \usepackage{booktabs}
 32 | 
 33 | \beamertemplatenavigationsymbolsempty
 34 | 
 35 | \setbeamersize{text margin left=0.5cm,text margin right=0.5cm}
 36 | \setbeamercolor{normal text}{fg=textcolor}
 37 | \setbeamercolor{structure}{fg=textcolor}
 38 | \setbeamercolor{button}{fg=textcolor}
 39 | 
 40 | \setbeamercolor{frametitle}{fg=white,bg=topbarcolor}
 41 | \setbeamerfont{frametitle}{size=\fontsize{12pt}{12pt}}
 42 | \addtobeamertemplate{frametitle}{\vskip-0.5ex}{}
 43 | 
 44 | \setbeamercolor{title page}{bg=sectionbg}
 45 | \setbeamercolor{headline}{fg=white}
 46 | \setbeamerfont{title}{size=\fontsize{24pt}{24pt},family=\textrm,series=\bfseries}
 47 | \setbeamerfont{subtitle}{size=\fontsize{12pt}{12pt},series=\bfseries}
 48 | \setbeamerfont{author}{size=\fontsize{10pt}{10pt},family=\textit}
 49 | 
 50 | \usepackage{hanging}
 51 | 
 52 | \setbeamertemplate{footnote}{%
 53 |   \hangpara{2em}{1}%
 54 |   \makebox[2em][l]{\tiny{\insertfootnotemark\ \insertfootnotetext\par}}%
 55 | }
 56 | 
 57 | \setbeamertemplate{footline}{
 58 |   \hspace{0.25cm}
 59 |   \hfill
 60 |   \texttt{
 61 |   \bfseries{
 62 |   \href{https://twitter.com/owickstrom}{@owickstrom}
 63 |   }}
 64 |   \hspace{0.25cm}
 65 |   \vspace{0.25cm}
 66 | }
 67 | 
 68 | \setbeamertemplate{items}[circle]
 69 | \setbeamertemplate{section in toc}{\inserttocsectionnumber.~\inserttocsection}
 70 | 
 71 | \newcommand{\singletitle}[1]{
 72 |   \begin{center}
 73 |     \vfill\vfill
 74 |     \fontsize{20pt}{20pt}\textbf{#1}
 75 |     \vfill\vfill
 76 |   \end{center}}
 77 | 
 78 | \newcommand{\notelist}[1]{
 79 |   \note{
 80 |     \begin{itemize}[<.->]
 81 |     \setlength\itemsep{2pt}
 82 |     \setstretch{0}#1
 83 |     \end{itemize}
 84 |   }}
 85 | 
 86 | \newcommand{\fnote}[1]{\footnote[frame]{#1}}
 87 | 
 88 | \newcommand\blfootnote[1]{%
 89 |   \begingroup
 90 |   \renewcommand\thefootnote{}\footnote[frame]{#1}%
 91 |   \addtocounter{footnote}{-1}%
 92 |   \endgroup
 93 | }
 94 | 
 95 | \AtBeginSection[]
 96 | {
 97 |   \begingroup
 98 |   \setbeamercolor{background canvas}{bg=sectionbg}
 99 |   \setbeamercolor{headline}{fg=white}
100 |   \setbeamertemplate{footline}{}
101 |   \begin{frame}
102 |     \begin{center}
103 |         \vfill\vfill
104 |         \fontsize{24pt}{24pt}\textbf{\textcolor{white}{\secname}}
105 |         \vfill\vfill
106 |     \end{center}
107 |   \end{frame}
108 |   \endgroup
109 | }
110 | 
111 | \definecolor{typecolor}{HTML}{5200FF}
112 | \definecolor{functioncolor}{HTML}{924C9D}
113 | \definecolor{stringcolor}{HTML}{E81C4F}
114 | \definecolor{numbercolor}{HTML}{0095FF}
115 | \definecolor{keywordcolor}{HTML}{444444}
116 | \definecolor{othercolor}{HTML}{444444}
117 | 
118 | \renewcommand{\KeywordTok}[1]{\textcolor{keywordcolor}{#1}}
119 | \renewcommand{\FunctionTok}[1]{\textcolor{functioncolor}{#1}}
120 | \renewcommand{\DataTypeTok}[1]{\textcolor{typecolor}{#1}}
121 | \renewcommand{\CommentTok}[1]{\textcolor{mediumgray}{#1}}
122 | \renewcommand{\StringTok}[1]{\textcolor{stringcolor}{#1}}
123 | \renewcommand{\DecValTok}[1]{\textcolor{numbercolor}{#1}}
124 | \renewcommand{\OtherTok}[1]{#1}
125 | \DefineVerbatimEnvironment{Highlighting}{Verbatim}{commandchars=\\\{\},fontsize=\linespread{1.05}\footnotesize}
126 | 
127 | \makeatletter
128 | \newcommand{\verbatimfont}[1]{\renewcommand{\verbatim@font}{\linespread{1.2}\ttfamily#1}}
129 | \makeatother
130 | 
131 | \let\OldTexttt\texttt
132 | \renewcommand{\texttt}[1]{\OldTexttt{\textcolor{typecolor}{#1}}}
133 | 
134 | \AtBeginDocument{%
135 |   \letcs\oig{@orig\string\includegraphics}%
136 |   \renewcommand<>\includegraphics[2][]{%
137 |     \only#3{%
138 |       {\centering\oig[{#1}]{#2}\par}%
139 |     }%
140 |   }%
141 | }
142 | 
143 | % for full width images
144 | \usepackage{textpos}
145 | 
146 | \usepackage{amsmath}
147 | 


--------------------------------------------------------------------------------
/src/listings/yesod-demo/src/Settings.hs:
--------------------------------------------------------------------------------
  1 | {-# LANGUAGE CPP               #-}
  2 | {-# LANGUAGE NoImplicitPrelude #-}
  3 | {-# LANGUAGE OverloadedStrings #-}
  4 | {-# LANGUAGE RecordWildCards   #-}
  5 | {-# LANGUAGE TemplateHaskell   #-}
  6 | -- | Settings are centralized, as much as possible, into this file. This
  7 | -- includes database connection settings, static file locations, etc.
  8 | -- In addition, you can configure a number of different aspects of Yesod
  9 | -- by overriding methods in the Yesod typeclass. That instance is
 10 | -- declared in the Foundation.hs file.
 11 | module Settings where
 12 | 
 13 | import ClassyPrelude.Yesod
 14 | import qualified Control.Exception as Exception
 15 | import Data.Aeson                  (Result (..), fromJSON, withObject, (.!=),
 16 |                                     (.:?))
 17 | import Data.FileEmbed              (embedFile)
 18 | import Data.Yaml                   (decodeEither')
 19 | import Language.Haskell.TH.Syntax  (Exp, Name, Q)
 20 | import Network.Wai.Handler.Warp    (HostPreference)
 21 | import Yesod.Default.Config2       (applyEnvValue, configSettingsYml)
 22 | import Yesod.Default.Util          (WidgetFileSettings, widgetFileNoReload,
 23 |                                     widgetFileReload)
 24 | 
 25 | -- | Runtime settings to configure this application. These settings can be
 26 | -- loaded from various sources: defaults, environment variables, config files,
 27 | -- theoretically even a database.
 28 | data AppSettings = AppSettings
 29 |     { appStaticDir              :: String
 30 |     -- ^ Directory from which to serve static files.
 31 |     , appRoot                   :: Maybe Text
 32 |     -- ^ Base for all generated URLs. If @Nothing@, determined
 33 |     -- from the request headers.
 34 |     , appHost                   :: HostPreference
 35 |     -- ^ Host/interface the server should bind to.
 36 |     , appPort                   :: Int
 37 |     -- ^ Port to listen on
 38 |     , appIpFromHeader           :: Bool
 39 |     -- ^ Get the IP address from the header when logging. Useful when sitting
 40 |     -- behind a reverse proxy.
 41 | 
 42 |     , appDetailedRequestLogging :: Bool
 43 |     -- ^ Use detailed request logging system
 44 |     , appShouldLogAll           :: Bool
 45 |     -- ^ Should all log messages be displayed?
 46 |     , appReloadTemplates        :: Bool
 47 |     -- ^ Use the reload version of templates
 48 |     , appMutableStatic          :: Bool
 49 |     -- ^ Assume that files in the static dir may change after compilation
 50 |     , appSkipCombining          :: Bool
 51 |     -- ^ Perform no stylesheet/script combining
 52 | 
 53 |     -- Example app-specific configuration values.
 54 |     , appCopyright              :: Text
 55 |     -- ^ Copyright text to appear in the footer of the page
 56 |     , appAnalytics              :: Maybe Text
 57 |     -- ^ Google Analytics code
 58 |     }
 59 | 
 60 | instance FromJSON AppSettings where
 61 |     parseJSON = withObject "AppSettings" $ \o -> do
 62 |         let defaultDev =
 63 | #ifdef DEVELOPMENT
 64 |                 True
 65 | #else
 66 |                 False
 67 | #endif
 68 |         appStaticDir              <- o .: "static-dir"
 69 |         appRoot                   <- o .:? "approot"
 70 |         appHost                   <- fromString <$> o .: "host"
 71 |         appPort                   <- o .: "port"
 72 |         appIpFromHeader           <- o .: "ip-from-header"
 73 | 
 74 |         dev                       <- o .:? "development"      .!= defaultDev
 75 | 
 76 |         appDetailedRequestLogging <- o .:? "detailed-logging" .!= dev
 77 |         appShouldLogAll           <- o .:? "should-log-all"   .!= dev
 78 |         appReloadTemplates        <- o .:? "reload-templates" .!= dev
 79 |         appMutableStatic          <- o .:? "mutable-static"   .!= dev
 80 |         appSkipCombining          <- o .:? "skip-combining"   .!= dev
 81 | 
 82 |         appCopyright              <- o .: "copyright"
 83 |         appAnalytics              <- o .:? "analytics"
 84 | 
 85 |         return AppSettings {..}
 86 | 
 87 | -- | Settings for 'widgetFile', such as which template languages to support and
 88 | -- default Hamlet settings.
 89 | --
 90 | -- For more information on modifying behavior, see:
 91 | --
 92 | -- https://github.com/yesodweb/yesod/wiki/Overriding-widgetFile
 93 | widgetFileSettings :: WidgetFileSettings
 94 | widgetFileSettings = def
 95 | 
 96 | -- | How static files should be combined.
 97 | combineSettings :: CombineSettings
 98 | combineSettings = def
 99 | 
100 | -- The rest of this file contains settings which rarely need changing by a
101 | -- user.
102 | 
103 | widgetFile :: String -> Q Exp
104 | widgetFile = (if appReloadTemplates compileTimeAppSettings
105 |                 then widgetFileReload
106 |                 else widgetFileNoReload)
107 |               widgetFileSettings
108 | 
109 | -- | Raw bytes at compile time of @config/settings.yml@
110 | configSettingsYmlBS :: ByteString
111 | configSettingsYmlBS = $(embedFile configSettingsYml)
112 | 
113 | -- | @config/settings.yml@, parsed to a @Value@.
114 | configSettingsYmlValue :: Value
115 | configSettingsYmlValue = either Exception.throw id
116 |                        $ decodeEither' configSettingsYmlBS
117 | 
118 | -- | A version of @AppSettings@ parsed at compile time from @config/settings.yml@.
119 | compileTimeAppSettings :: AppSettings
120 | compileTimeAppSettings =
121 |     case fromJSON $ applyEnvValue False mempty configSettingsYmlValue of
122 |         Error e -> error e
123 |         Success settings -> settings
124 | 
125 | -- The following two functions can be used to combine multiple CSS or JS files
126 | -- at compile time to decrease the number of http requests.
127 | -- Sample usage (inside a Widget):
128 | --
129 | -- > $(combineStylesheets 'StaticR [style1_css, style2_css])
130 | 
131 | combineStylesheets :: Name -> [Route Static] -> Q Exp
132 | combineStylesheets = combineStylesheets'
133 |     (appSkipCombining compileTimeAppSettings)
134 |     combineSettings
135 | 
136 | combineScripts :: Name -> [Route Static] -> Q Exp
137 | combineScripts = combineScripts'
138 |     (appSkipCombining compileTimeAppSettings)
139 |     combineSettings
140 | 


--------------------------------------------------------------------------------
/src/listings/yesod-demo/src/Application.hs:
--------------------------------------------------------------------------------
  1 | {-# LANGUAGE ViewPatterns          #-}
  2 | {-# LANGUAGE MultiParamTypeClasses #-}
  3 | {-# LANGUAGE NoImplicitPrelude     #-}
  4 | {-# LANGUAGE OverloadedStrings     #-}
  5 | {-# LANGUAGE RecordWildCards       #-}
  6 | {-# LANGUAGE TemplateHaskell       #-}
  7 | {-# LANGUAGE TypeFamilies          #-}
  8 | {-# OPTIONS_GHC -fno-warn-orphans #-}
  9 | 
 10 | module Application
 11 |   ( getApplicationDev
 12 |   , appMain
 13 |   , develMain
 14 |   , makeFoundation
 15 |   , makeLogWare
 16 |     -- * for DevelMain
 17 |   , getApplicationRepl
 18 |   , shutdownApp
 19 |     -- * for GHCI
 20 |   , handler
 21 |   ) where
 22 | 
 23 | import           Control.Monad.Logger                 (liftLoc)
 24 | import           Data.HashMap.Strict                  as HM
 25 | import           Import
 26 | import           Language.Haskell.TH.Syntax           (qLocation)
 27 | import           Network.Wai                          (Middleware)
 28 | import           Network.Wai.Handler.Warp             (Settings,
 29 |                                                        defaultSettings,
 30 |                                                        defaultShouldDisplayException,
 31 |                                                        getPort, runSettings,
 32 |                                                        setHost, setOnException,
 33 |                                                        setPort)
 34 | import           Network.Wai.Middleware.RequestLogger (Destination (Logger),
 35 |                                                        IPAddrSource (..),
 36 |                                                        OutputFormat (..),
 37 |                                                        destination,
 38 |                                                        mkRequestLogger,
 39 |                                                        outputFormat)
 40 | import           System.Log.FastLogger                (defaultBufSize,
 41 |                                                        newStdoutLoggerSet,
 42 |                                                        toLogStr)
 43 | 
 44 | import           Handler.Common
 45 | import           Handler.Home
 46 | import           Article
 47 | 
 48 | -- This line actually creates our YesodDispatch instance. It is the second half
 49 | -- of the call to mkYesodData which occurs in Foundation.hs. Please see the
 50 | -- comments there for more details.
 51 | mkYesodDispatch "App" resourcesApp
 52 | 
 53 | -- | This function allocates resources (such as a database connection pool),
 54 | -- performs initialization and returns a foundation datatype value. This is also
 55 | -- the place to put your migrate statements to have automatic database
 56 | -- migrations handled by Yesod.
 57 | makeFoundation :: AppSettings -> IO App
 58 | makeFoundation appSettings
 59 |     -- Some basic initializations: HTTP connection manager, logger, and static
 60 |     -- subsite.
 61 |  = do
 62 |   appHttpManager <- newManager
 63 |   appLogger <- newStdoutLoggerSet defaultBufSize >>= makeYesodLogger
 64 |   appStatic <-
 65 |     (if appMutableStatic appSettings
 66 |        then staticDevel
 67 |        else static)
 68 |       (appStaticDir appSettings)
 69 |   let appArticles =
 70 |         HM.fromList
 71 |         [ (articleId a, a)
 72 |         | a <-
 73 |             [ Article
 74 |                 (ArticleId "fast-and-fearless")
 75 |                 "Fast and Fearless Evolution of Server-Side Web Applications"
 76 |                 "Lorem ipsum dolor sit amet..."
 77 |             , Article
 78 |                 (ArticleId "introducing-yesod")
 79 |                 "Introducing Yesod"
 80 |                 "Lorem ipsum dolor sit amet..."
 81 |             ]
 82 |         ]
 83 |   appArticleComments <- newMVar $
 84 |         HM.fromList
 85 |         [ (ArticleId "fast-and-fearless", [Comment "Alice" "This was nice.", Comment "Bob" "Whoa!"])
 86 |         , (ArticleId "introducing-yesod", [Comment "Carol" "Wonderful post! Keep them coming.", Comment "Mallory" "I have have opinions. You suck."])
 87 |         ]
 88 |     -- Return the foundation
 89 |   return App {..}
 90 | 
 91 | -- | Convert our foundation to a WAI Application by calling @toWaiAppPlain@ and
 92 | -- applying some additional middlewares.
 93 | makeApplication :: App -> IO Application
 94 | makeApplication foundation = do
 95 |   logWare <- makeLogWare foundation
 96 |     -- Create the WAI application and apply middlewares
 97 |   appPlain <- toWaiAppPlain foundation
 98 |   return $ logWare $ defaultMiddlewaresNoLogging appPlain
 99 | 
100 | makeLogWare :: App -> IO Middleware
101 | makeLogWare foundation =
102 |   mkRequestLogger
103 |     def
104 |     { outputFormat =
105 |         if appDetailedRequestLogging $ appSettings foundation
106 |           then Detailed True
107 |           else Apache
108 |                  (if appIpFromHeader $ appSettings foundation
109 |                     then FromFallback
110 |                     else FromSocket)
111 |     , destination = Logger $ loggerSet $ appLogger foundation
112 |     }
113 | 
114 | -- | Warp settings for the given foundation value.
115 | warpSettings :: App -> Settings
116 | warpSettings foundation =
117 |   setPort (appPort $ appSettings foundation) $
118 |   setHost (appHost $ appSettings foundation) $
119 |   setOnException
120 |     (\_req e ->
121 |        when (defaultShouldDisplayException e) $
122 |        messageLoggerSource
123 |          foundation
124 |          (appLogger foundation)
125 |          $(qLocation >>= liftLoc)
126 |          "yesod"
127 |          LevelError
128 |          (toLogStr $ "Exception from Warp: " ++ show e))
129 |     defaultSettings
130 | 
131 | -- | For yesod devel, return the Warp settings and WAI Application.
132 | getApplicationDev :: IO (Settings, Application)
133 | getApplicationDev = do
134 |   settings <- getAppSettings
135 |   foundation <- makeFoundation settings
136 |   wsettings <- getDevSettings $ warpSettings foundation
137 |   app <- makeApplication foundation
138 |   return (wsettings, app)
139 | 
140 | getAppSettings :: IO AppSettings
141 | getAppSettings = loadYamlSettings [configSettingsYml] [] useEnv
142 | 
143 | -- | main function for use by yesod devel
144 | develMain :: IO ()
145 | develMain = develMainHelper getApplicationDev
146 | 
147 | -- | The @main@ function for an executable running this site.
148 | appMain :: IO ()
149 | appMain
150 |     -- Get the settings from all relevant sources
151 |  = do
152 |   settings <-
153 |     loadYamlSettingsArgs
154 |         -- fall back to compile-time values, set to [] to require values at runtime
155 |       [configSettingsYmlValue]
156 |         -- allow environment variables to override
157 |       useEnv
158 |     -- Generate the foundation from the settings
159 |   foundation <- makeFoundation settings
160 |     -- Generate a WAI Application from the foundation
161 |   app <- makeApplication foundation
162 |     -- Run the application with Warp
163 |   runSettings (warpSettings foundation) app
164 | 
165 | --------------------------------------------------------------
166 | -- Functions for DevelMain.hs (a way to run the app from GHCi)
167 | --------------------------------------------------------------
168 | getApplicationRepl :: IO (Int, App, Application)
169 | getApplicationRepl = do
170 |   settings <- getAppSettings
171 |   foundation <- makeFoundation settings
172 |   wsettings <- getDevSettings $ warpSettings foundation
173 |   app1 <- makeApplication foundation
174 |   return (getPort wsettings, foundation, app1)
175 | 
176 | shutdownApp :: App -> IO ()
177 | shutdownApp _ = return ()
178 | 
179 | ---------------------------------------------
180 | -- Functions for use in development with GHCi
181 | ---------------------------------------------
182 | -- | Run a handler
183 | handler :: Handler a -> IO a
184 | handler h = getAppSettings >>= makeFoundation >>= flip unsafeHandler h
185 | 


--------------------------------------------------------------------------------
/src/listings/yesod-demo/src/Foundation.hs:
--------------------------------------------------------------------------------
  1 | {-# LANGUAGE MultiParamTypeClasses #-}
  2 | {-# LANGUAGE NoImplicitPrelude     #-}
  3 | {-# LANGUAGE OverloadedStrings     #-}
  4 | {-# LANGUAGE TemplateHaskell       #-}
  5 | {-# LANGUAGE TypeFamilies          #-}
  6 | {-# LANGUAGE ViewPatterns          #-}
  7 | 
  8 | module Foundation where
  9 | 
 10 | import qualified Data.CaseInsensitive as CI
 11 | import           Data.HashMap.Strict  (HashMap)
 12 | import qualified Data.Text.Encoding   as TE
 13 | import           Import.NoFoundation
 14 | import           Text.Hamlet          (hamletFile)
 15 | import           Text.Jasmine         (minifym)
 16 | import           Yesod.Core.Types     (Logger)
 17 | import qualified Yesod.Core.Unsafe    as Unsafe
 18 | import           Yesod.Default.Util   (addStaticContentExternal)
 19 | 
 20 | import           Article
 21 | 
 22 | -- | The foundation datatype for your application. This can be a good place to
 23 | -- keep settings and values requiring initialization before your application
 24 | -- starts running, such as database connections. Every handler will have
 25 | -- access to the data present here.
 26 | data App = App
 27 |   { appSettings        :: AppSettings
 28 |   , appStatic          :: Static -- ^ Settings for static file serving.
 29 |   , appHttpManager     :: Manager
 30 |   , appLogger          :: Logger
 31 |   , appArticles        :: HashMap ArticleId Article
 32 |   , appArticleComments :: MVar (HashMap ArticleId [Comment])
 33 |   }
 34 | 
 35 | data MenuItem = MenuItem
 36 |   { menuItemLabel          :: Text
 37 |   , menuItemRoute          :: Route App
 38 |   , menuItemAccessCallback :: Bool
 39 |   }
 40 | 
 41 | data MenuTypes
 42 |   = NavbarLeft MenuItem
 43 |   | NavbarRight MenuItem
 44 | 
 45 | -- This is where we define all of the routes in our application. For a full
 46 | -- explanation of the syntax, please see:
 47 | -- http://www.yesodweb.com/book/routing-and-handlers
 48 | --
 49 | -- Note that this is really half the story; in Application.hs, mkYesodDispatch
 50 | -- generates the rest of the code. Please see the following documentation
 51 | -- for an explanation for this split:
 52 | -- http://www.yesodweb.com/book/scaffolding-and-the-site-template#scaffolding-and-the-site-template_foundation_and_application_modules
 53 | --
 54 | -- This function also generates the following type synonyms:
 55 | -- type Handler = HandlerT App IO
 56 | -- type Widget = WidgetT App IO ()
 57 | mkYesodData "App" $(parseRoutesFile "config/routes")
 58 | 
 59 | -- | A convenient synonym for creating forms.
 60 | type Form x = Html -> MForm (HandlerT App IO) (FormResult x, Widget)
 61 | 
 62 | -- Please see the documentation for the Yesod typeclass. There are a number
 63 | -- of settings which can be configured by overriding methods here.
 64 | instance Yesod App
 65 |     -- Controls the base of generated URLs. For more information on modifying,
 66 |     -- see: https://github.com/yesodweb/yesod/wiki/Overriding-approot
 67 |                                                                       where
 68 |   approot =
 69 |     ApprootRequest $ \app req ->
 70 |       case appRoot $ appSettings app of
 71 |         Nothing   -> getApprootText guessApproot app req
 72 |         Just root -> root
 73 |     -- Store session data on the client in encrypted cookies,
 74 |     -- default session idle timeout is 120 minutes
 75 |   makeSessionBackend _ =
 76 |     Just <$>
 77 |     defaultClientSessionBackend
 78 |       120 -- timeout in minutes
 79 |       "config/client_session_key.aes"
 80 |     -- Yesod Middleware allows you to run code before and after each handler function.
 81 |     -- The defaultYesodMiddleware adds the response header "Vary: Accept, Accept-Language" and performs authorization checks.
 82 |     -- Some users may also want to add the defaultCsrfMiddleware, which:
 83 |     --   a) Sets a cookie with a CSRF token in it.
 84 |     --   b) Validates that incoming write requests include that token in either a header or POST parameter.
 85 |     -- To add it, chain it together with the defaultMiddleware: yesodMiddleware = defaultYesodMiddleware . defaultCsrfMiddleware
 86 |     -- For details, see the CSRF documentation in the Yesod.Core.Handler module of the yesod-core package.
 87 |   yesodMiddleware = defaultYesodMiddleware
 88 |   defaultLayout widget = do
 89 |     master <- getYesod
 90 |     mmsg <- getMessage
 91 |     mcurrentRoute <- getCurrentRoute
 92 |         -- Define the menu items of the header.
 93 |     let menuItems =
 94 |           [ NavbarLeft $
 95 |             MenuItem
 96 |             { menuItemLabel = "Home"
 97 |             , menuItemRoute = HomeR
 98 |             , menuItemAccessCallback = True
 99 |             }
100 |           ]
101 |     let navbarLeftMenuItems = [x | NavbarLeft x <- menuItems]
102 |     let navbarRightMenuItems = [x | NavbarRight x <- menuItems]
103 |     let navbarLeftFilteredMenuItems =
104 |           [x | x <- navbarLeftMenuItems, menuItemAccessCallback x]
105 |     let navbarRightFilteredMenuItems =
106 |           [x | x <- navbarRightMenuItems, menuItemAccessCallback x]
107 |         -- We break up the default layout into two components:
108 |         -- default-layout is the contents of the body tag, and
109 |         -- default-layout-wrapper is the entire page. Since the final
110 |         -- value passed to hamletToRepHtml cannot be a widget, this allows
111 |         -- you to use normal widget features in default-layout.
112 |     pc <-
113 |       widgetToPageContent $ do
114 |         addStylesheet $ StaticR css_bootstrap_css
115 |         $(widgetFile "default-layout")
116 |     withUrlRenderer $(hamletFile "templates/default-layout-wrapper.hamlet")
117 |     -- Routes not requiring authenitcation.
118 |   isAuthorized FaviconR _ = return Authorized
119 |   isAuthorized RobotsR _  = return Authorized
120 |     -- Default to Authorized for now.
121 |   isAuthorized _ _        = return Authorized
122 |     -- This function creates static content files in the static folder
123 |     -- and names them based on a hash of their content. This allows
124 |     -- expiration dates to be set far in the future without worry of
125 |     -- users receiving stale content.
126 |   addStaticContent ext mime content = do
127 |     master <- getYesod
128 |     let staticDir = appStaticDir $ appSettings master
129 |     addStaticContentExternal
130 |       minifym
131 |       genFileName
132 |       staticDir
133 |       (StaticR . flip StaticRoute [])
134 |       ext
135 |       mime
136 |       content
137 |         -- Generate a unique filename based on the content itself
138 |     where
139 |       genFileName lbs = "autogen-" ++ base64md5 lbs
140 |     -- What messages should be logged. The following includes all messages when
141 |     -- in development, and warnings and errors in production.
142 |   shouldLog app _source level =
143 |     appShouldLogAll (appSettings app) ||
144 |     level == LevelWarn || level == LevelError
145 |   makeLogger = return . appLogger
146 | 
147 | -- This instance is required to use forms. You can modify renderMessage to
148 | -- achieve customized and internationalized form validation messages.
149 | instance RenderMessage App FormMessage where
150 |   renderMessage _ _ = defaultFormMessage
151 | 
152 | -- Useful when writing code that is re-usable outside of the Handler context.
153 | -- An example is background jobs that send email.
154 | -- This can also be useful for writing code that works across multiple Yesod applications.
155 | instance HasHttpManager App where
156 |   getHttpManager = appHttpManager
157 | 
158 | unsafeHandler :: App -> Handler a -> IO a
159 | unsafeHandler = Unsafe.fakeHandlerGetLogger appLogger
160 | -- Note: Some functionality previously present in the scaffolding has been
161 | -- moved to documentation in the Wiki. Following are some hopefully helpful
162 | -- links:
163 | --
164 | -- https://github.com/yesodweb/yesod/wiki/Sending-email
165 | -- https://github.com/yesodweb/yesod/wiki/Serve-static-files-from-a-separate-domain
166 | -- https://github.com/yesodweb/yesod/wiki/i18n-messages-in-the-scaffolding
167 | 


--------------------------------------------------------------------------------
/src/listings/airship-demo/LICENSE:
--------------------------------------------------------------------------------
  1 | Mozilla Public License Version 2.0
  2 | ==================================
  3 | 
  4 | 1. Definitions
  5 | --------------
  6 | 
  7 | 1.1. "Contributor"
  8 |     means each individual or legal entity that creates, contributes to
  9 |     the creation of, or owns Covered Software.
 10 | 
 11 | 1.2. "Contributor Version"
 12 |     means the combination of the Contributions of others (if any) used
 13 |     by a Contributor and that particular Contributor's Contribution.
 14 | 
 15 | 1.3. "Contribution"
 16 |     means Covered Software of a particular Contributor.
 17 | 
 18 | 1.4. "Covered Software"
 19 |     means Source Code Form to which the initial Contributor has attached
 20 |     the notice in Exhibit A, the Executable Form of such Source Code
 21 |     Form, and Modifications of such Source Code Form, in each case
 22 |     including portions thereof.
 23 | 
 24 | 1.5. "Incompatible With Secondary Licenses"
 25 |     means
 26 | 
 27 |     (a) that the initial Contributor has attached the notice described
 28 |         in Exhibit B to the Covered Software; or
 29 | 
 30 |     (b) that the Covered Software was made available under the terms of
 31 |         version 1.1 or earlier of the License, but not also under the
 32 |         terms of a Secondary License.
 33 | 
 34 | 1.6. "Executable Form"
 35 |     means any form of the work other than Source Code Form.
 36 | 
 37 | 1.7. "Larger Work"
 38 |     means a work that combines Covered Software with other material, in
 39 |     a separate file or files, that is not Covered Software.
 40 | 
 41 | 1.8. "License"
 42 |     means this document.
 43 | 
 44 | 1.9. "Licensable"
 45 |     means having the right to grant, to the maximum extent possible,
 46 |     whether at the time of the initial grant or subsequently, any and
 47 |     all of the rights conveyed by this License.
 48 | 
 49 | 1.10. "Modifications"
 50 |     means any of the following:
 51 | 
 52 |     (a) any file in Source Code Form that results from an addition to,
 53 |         deletion from, or modification of the contents of Covered
 54 |         Software; or
 55 | 
 56 |     (b) any new file in Source Code Form that contains any Covered
 57 |         Software.
 58 | 
 59 | 1.11. "Patent Claims" of a Contributor
 60 |     means any patent claim(s), including without limitation, method,
 61 |     process, and apparatus claims, in any patent Licensable by such
 62 |     Contributor that would be infringed, but for the grant of the
 63 |     License, by the making, using, selling, offering for sale, having
 64 |     made, import, or transfer of either its Contributions or its
 65 |     Contributor Version.
 66 | 
 67 | 1.12. "Secondary License"
 68 |     means either the GNU General Public License, Version 2.0, the GNU
 69 |     Lesser General Public License, Version 2.1, the GNU Affero General
 70 |     Public License, Version 3.0, or any later versions of those
 71 |     licenses.
 72 | 
 73 | 1.13. "Source Code Form"
 74 |     means the form of the work preferred for making modifications.
 75 | 
 76 | 1.14. "You" (or "Your")
 77 |     means an individual or a legal entity exercising rights under this
 78 |     License. For legal entities, "You" includes any entity that
 79 |     controls, is controlled by, or is under common control with You. For
 80 |     purposes of this definition, "control" means (a) the power, direct
 81 |     or indirect, to cause the direction or management of such entity,
 82 |     whether by contract or otherwise, or (b) ownership of more than
 83 |     fifty percent (50%) of the outstanding shares or beneficial
 84 |     ownership of such entity.
 85 | 
 86 | 2. License Grants and Conditions
 87 | --------------------------------
 88 | 
 89 | 2.1. Grants
 90 | 
 91 | Each Contributor hereby grants You a world-wide, royalty-free,
 92 | non-exclusive license:
 93 | 
 94 | (a) under intellectual property rights (other than patent or trademark)
 95 |     Licensable by such Contributor to use, reproduce, make available,
 96 |     modify, display, perform, distribute, and otherwise exploit its
 97 |     Contributions, either on an unmodified basis, with Modifications, or
 98 |     as part of a Larger Work; and
 99 | 
100 | (b) under Patent Claims of such Contributor to make, use, sell, offer
101 |     for sale, have made, import, and otherwise transfer either its
102 |     Contributions or its Contributor Version.
103 | 
104 | 2.2. Effective Date
105 | 
106 | The licenses granted in Section 2.1 with respect to any Contribution
107 | become effective for each Contribution on the date the Contributor first
108 | distributes such Contribution.
109 | 
110 | 2.3. Limitations on Grant Scope
111 | 
112 | The licenses granted in this Section 2 are the only rights granted under
113 | this License. No additional rights or licenses will be implied from the
114 | distribution or licensing of Covered Software under this License.
115 | Notwithstanding Section 2.1(b) above, no patent license is granted by a
116 | Contributor:
117 | 
118 | (a) for any code that a Contributor has removed from Covered Software;
119 |     or
120 | 
121 | (b) for infringements caused by: (i) Your and any other third party's
122 |     modifications of Covered Software, or (ii) the combination of its
123 |     Contributions with other software (except as part of its Contributor
124 |     Version); or
125 | 
126 | (c) under Patent Claims infringed by Covered Software in the absence of
127 |     its Contributions.
128 | 
129 | This License does not grant any rights in the trademarks, service marks,
130 | or logos of any Contributor (except as may be necessary to comply with
131 | the notice requirements in Section 3.4).
132 | 
133 | 2.4. Subsequent Licenses
134 | 
135 | No Contributor makes additional grants as a result of Your choice to
136 | distribute the Covered Software under a subsequent version of this
137 | License (see Section 10.2) or under the terms of a Secondary License (if
138 | permitted under the terms of Section 3.3).
139 | 
140 | 2.5. Representation
141 | 
142 | Each Contributor represents that the Contributor believes its
143 | Contributions are its original creation(s) or it has sufficient rights
144 | to grant the rights to its Contributions conveyed by this License.
145 | 
146 | 2.6. Fair Use
147 | 
148 | This License is not intended to limit any rights You have under
149 | applicable copyright doctrines of fair use, fair dealing, or other
150 | equivalents.
151 | 
152 | 2.7. Conditions
153 | 
154 | Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
155 | in Section 2.1.
156 | 
157 | 3. Responsibilities
158 | -------------------
159 | 
160 | 3.1. Distribution of Source Form
161 | 
162 | All distribution of Covered Software in Source Code Form, including any
163 | Modifications that You create or to which You contribute, must be under
164 | the terms of this License. You must inform recipients that the Source
165 | Code Form of the Covered Software is governed by the terms of this
166 | License, and how they can obtain a copy of this License. You may not
167 | attempt to alter or restrict the recipients' rights in the Source Code
168 | Form.
169 | 
170 | 3.2. Distribution of Executable Form
171 | 
172 | If You distribute Covered Software in Executable Form then:
173 | 
174 | (a) such Covered Software must also be made available in Source Code
175 |     Form, as described in Section 3.1, and You must inform recipients of
176 |     the Executable Form how they can obtain a copy of such Source Code
177 |     Form by reasonable means in a timely manner, at a charge no more
178 |     than the cost of distribution to the recipient; and
179 | 
180 | (b) You may distribute such Executable Form under the terms of this
181 |     License, or sublicense it under different terms, provided that the
182 |     license for the Executable Form does not attempt to limit or alter
183 |     the recipients' rights in the Source Code Form under this License.
184 | 
185 | 3.3. Distribution of a Larger Work
186 | 
187 | You may create and distribute a Larger Work under terms of Your choice,
188 | provided that You also comply with the requirements of this License for
189 | the Covered Software. If the Larger Work is a combination of Covered
190 | Software with a work governed by one or more Secondary Licenses, and the
191 | Covered Software is not Incompatible With Secondary Licenses, this
192 | License permits You to additionally distribute such Covered Software
193 | under the terms of such Secondary License(s), so that the recipient of
194 | the Larger Work may, at their option, further distribute the Covered
195 | Software under the terms of either this License or such Secondary
196 | License(s).
197 | 
198 | 3.4. Notices
199 | 
200 | You may not remove or alter the substance of any license notices
201 | (including copyright notices, patent notices, disclaimers of warranty,
202 | or limitations of liability) contained within the Source Code Form of
203 | the Covered Software, except that You may alter any license notices to
204 | the extent required to remedy known factual inaccuracies.
205 | 
206 | 3.5. Application of Additional Terms
207 | 
208 | You may choose to offer, and to charge a fee for, warranty, support,
209 | indemnity or liability obligations to one or more recipients of Covered
210 | Software. However, You may do so only on Your own behalf, and not on
211 | behalf of any Contributor. You must make it absolutely clear that any
212 | such warranty, support, indemnity, or liability obligation is offered by
213 | You alone, and You hereby agree to indemnify every Contributor for any
214 | liability incurred by such Contributor as a result of warranty, support,
215 | indemnity or liability terms You offer. You may include additional
216 | disclaimers of warranty and limitations of liability specific to any
217 | jurisdiction.
218 | 
219 | 4. Inability to Comply Due to Statute or Regulation
220 | ---------------------------------------------------
221 | 
222 | If it is impossible for You to comply with any of the terms of this
223 | License with respect to some or all of the Covered Software due to
224 | statute, judicial order, or regulation then You must: (a) comply with
225 | the terms of this License to the maximum extent possible; and (b)
226 | describe the limitations and the code they affect. Such description must
227 | be placed in a text file included with all distributions of the Covered
228 | Software under this License. Except to the extent prohibited by statute
229 | or regulation, such description must be sufficiently detailed for a
230 | recipient of ordinary skill to be able to understand it.
231 | 
232 | 5. Termination
233 | --------------
234 | 
235 | 5.1. The rights granted under this License will terminate automatically
236 | if You fail to comply with any of its terms. However, if You become
237 | compliant, then the rights granted under this License from a particular
238 | Contributor are reinstated (a) provisionally, unless and until such
239 | Contributor explicitly and finally terminates Your grants, and (b) on an
240 | ongoing basis, if such Contributor fails to notify You of the
241 | non-compliance by some reasonable means prior to 60 days after You have
242 | come back into compliance. Moreover, Your grants from a particular
243 | Contributor are reinstated on an ongoing basis if such Contributor
244 | notifies You of the non-compliance by some reasonable means, this is the
245 | first time You have received notice of non-compliance with this License
246 | from such Contributor, and You become compliant prior to 30 days after
247 | Your receipt of the notice.
248 | 
249 | 5.2. If You initiate litigation against any entity by asserting a patent
250 | infringement claim (excluding declaratory judgment actions,
251 | counter-claims, and cross-claims) alleging that a Contributor Version
252 | directly or indirectly infringes any patent, then the rights granted to
253 | You by any and all Contributors for the Covered Software under Section
254 | 2.1 of this License shall terminate.
255 | 
256 | 5.3. In the event of termination under Sections 5.1 or 5.2 above, all
257 | end user license agreements (excluding distributors and resellers) which
258 | have been validly granted by You or Your distributors under this License
259 | prior to termination shall survive termination.
260 | 
261 | ************************************************************************
262 | *                                                                      *
263 | *  6. Disclaimer of Warranty                                           *
264 | *  -------------------------                                           *
265 | *                                                                      *
266 | *  Covered Software is provided under this License on an "as is"       *
267 | *  basis, without warranty of any kind, either expressed, implied, or  *
268 | *  statutory, including, without limitation, warranties that the       *
269 | *  Covered Software is free of defects, merchantable, fit for a        *
270 | *  particular purpose or non-infringing. The entire risk as to the     *
271 | *  quality and performance of the Covered Software is with You.        *
272 | *  Should any Covered Software prove defective in any respect, You     *
273 | *  (not any Contributor) assume the cost of any necessary servicing,   *
274 | *  repair, or correction. This disclaimer of warranty constitutes an   *
275 | *  essential part of this License. No use of any Covered Software is   *
276 | *  authorized under this License except under this disclaimer.         *
277 | *                                                                      *
278 | ************************************************************************
279 | 
280 | ************************************************************************
281 | *                                                                      *
282 | *  7. Limitation of Liability                                          *
283 | *  --------------------------                                          *
284 | *                                                                      *
285 | *  Under no circumstances and under no legal theory, whether tort      *
286 | *  (including negligence), contract, or otherwise, shall any           *
287 | *  Contributor, or anyone who distributes Covered Software as          *
288 | *  permitted above, be liable to You for any direct, indirect,         *
289 | *  special, incidental, or consequential damages of any character      *
290 | *  including, without limitation, damages for lost profits, loss of    *
291 | *  goodwill, work stoppage, computer failure or malfunction, or any    *
292 | *  and all other commercial damages or losses, even if such party      *
293 | *  shall have been informed of the possibility of such damages. This   *
294 | *  limitation of liability shall not apply to liability for death or   *
295 | *  personal injury resulting from such party's negligence to the       *
296 | *  extent applicable law prohibits such limitation. Some               *
297 | *  jurisdictions do not allow the exclusion or limitation of           *
298 | *  incidental or consequential damages, so this exclusion and          *
299 | *  limitation may not apply to You.                                    *
300 | *                                                                      *
301 | ************************************************************************
302 | 
303 | 8. Litigation
304 | -------------
305 | 
306 | Any litigation relating to this License may be brought only in the
307 | courts of a jurisdiction where the defendant maintains its principal
308 | place of business and such litigation shall be governed by laws of that
309 | jurisdiction, without reference to its conflict-of-law provisions.
310 | Nothing in this Section shall prevent a party's ability to bring
311 | cross-claims or counter-claims.
312 | 
313 | 9. Miscellaneous
314 | ----------------
315 | 
316 | This License represents the complete agreement concerning the subject
317 | matter hereof. If any provision of this License is held to be
318 | unenforceable, such provision shall be reformed only to the extent
319 | necessary to make it enforceable. Any law or regulation which provides
320 | that the language of a contract shall be construed against the drafter
321 | shall not be used to construe this License against a Contributor.
322 | 
323 | 10. Versions of the License
324 | ---------------------------
325 | 
326 | 10.1. New Versions
327 | 
328 | Mozilla Foundation is the license steward. Except as provided in Section
329 | 10.3, no one other than the license steward has the right to modify or
330 | publish new versions of this License. Each version will be given a
331 | distinguishing version number.
332 | 
333 | 10.2. Effect of New Versions
334 | 
335 | You may distribute the Covered Software under the terms of the version
336 | of the License under which You originally received the Covered Software,
337 | or under the terms of any subsequent version published by the license
338 | steward.
339 | 
340 | 10.3. Modified Versions
341 | 
342 | If you create software not governed by this License, and you want to
343 | create a new license for such software, you may create and use a
344 | modified version of this License if you rename the license and remove
345 | any references to the name of the license steward (except to note that
346 | such modified license differs from this License).
347 | 
348 | 10.4. Distributing Source Code Form that is Incompatible With Secondary
349 | Licenses
350 | 
351 | If You choose to distribute Source Code Form that is Incompatible With
352 | Secondary Licenses under the terms of this version of the License, the
353 | notice described in Exhibit B of this License must be attached.
354 | 
355 | Exhibit A - Source Code Form License Notice
356 | -------------------------------------------
357 | 
358 |   This Source Code Form is subject to the terms of the Mozilla Public
359 |   License, v. 2.0. If a copy of the MPL was not distributed with this
360 |   file, You can obtain one at http://mozilla.org/MPL/2.0/.
361 | 
362 | If it is not possible or desirable to put the notice in a particular
363 | file, then You may include the notice in a location (such as a LICENSE
364 | file in a relevant directory) where a recipient would be likely to look
365 | for such a notice.
366 | 
367 | You may add additional accurate notices of copyright ownership.
368 | 
369 | Exhibit B - "Incompatible With Secondary Licenses" Notice
370 | ---------------------------------------------------------
371 | 
372 |   This Source Code Form is "Incompatible With Secondary Licenses", as
373 |   defined by the Mozilla Public License, v. 2.0.
374 | 


--------------------------------------------------------------------------------
/src/listings/scotty-demo/LICENSE:
--------------------------------------------------------------------------------
  1 | Mozilla Public License Version 2.0
  2 | ==================================
  3 | 
  4 | 1. Definitions
  5 | --------------
  6 | 
  7 | 1.1. "Contributor"
  8 |     means each individual or legal entity that creates, contributes to
  9 |     the creation of, or owns Covered Software.
 10 | 
 11 | 1.2. "Contributor Version"
 12 |     means the combination of the Contributions of others (if any) used
 13 |     by a Contributor and that particular Contributor's Contribution.
 14 | 
 15 | 1.3. "Contribution"
 16 |     means Covered Software of a particular Contributor.
 17 | 
 18 | 1.4. "Covered Software"
 19 |     means Source Code Form to which the initial Contributor has attached
 20 |     the notice in Exhibit A, the Executable Form of such Source Code
 21 |     Form, and Modifications of such Source Code Form, in each case
 22 |     including portions thereof.
 23 | 
 24 | 1.5. "Incompatible With Secondary Licenses"
 25 |     means
 26 | 
 27 |     (a) that the initial Contributor has attached the notice described
 28 |         in Exhibit B to the Covered Software; or
 29 | 
 30 |     (b) that the Covered Software was made available under the terms of
 31 |         version 1.1 or earlier of the License, but not also under the
 32 |         terms of a Secondary License.
 33 | 
 34 | 1.6. "Executable Form"
 35 |     means any form of the work other than Source Code Form.
 36 | 
 37 | 1.7. "Larger Work"
 38 |     means a work that combines Covered Software with other material, in
 39 |     a separate file or files, that is not Covered Software.
 40 | 
 41 | 1.8. "License"
 42 |     means this document.
 43 | 
 44 | 1.9. "Licensable"
 45 |     means having the right to grant, to the maximum extent possible,
 46 |     whether at the time of the initial grant or subsequently, any and
 47 |     all of the rights conveyed by this License.
 48 | 
 49 | 1.10. "Modifications"
 50 |     means any of the following:
 51 | 
 52 |     (a) any file in Source Code Form that results from an addition to,
 53 |         deletion from, or modification of the contents of Covered
 54 |         Software; or
 55 | 
 56 |     (b) any new file in Source Code Form that contains any Covered
 57 |         Software.
 58 | 
 59 | 1.11. "Patent Claims" of a Contributor
 60 |     means any patent claim(s), including without limitation, method,
 61 |     process, and apparatus claims, in any patent Licensable by such
 62 |     Contributor that would be infringed, but for the grant of the
 63 |     License, by the making, using, selling, offering for sale, having
 64 |     made, import, or transfer of either its Contributions or its
 65 |     Contributor Version.
 66 | 
 67 | 1.12. "Secondary License"
 68 |     means either the GNU General Public License, Version 2.0, the GNU
 69 |     Lesser General Public License, Version 2.1, the GNU Affero General
 70 |     Public License, Version 3.0, or any later versions of those
 71 |     licenses.
 72 | 
 73 | 1.13. "Source Code Form"
 74 |     means the form of the work preferred for making modifications.
 75 | 
 76 | 1.14. "You" (or "Your")
 77 |     means an individual or a legal entity exercising rights under this
 78 |     License. For legal entities, "You" includes any entity that
 79 |     controls, is controlled by, or is under common control with You. For
 80 |     purposes of this definition, "control" means (a) the power, direct
 81 |     or indirect, to cause the direction or management of such entity,
 82 |     whether by contract or otherwise, or (b) ownership of more than
 83 |     fifty percent (50%) of the outstanding shares or beneficial
 84 |     ownership of such entity.
 85 | 
 86 | 2. License Grants and Conditions
 87 | --------------------------------
 88 | 
 89 | 2.1. Grants
 90 | 
 91 | Each Contributor hereby grants You a world-wide, royalty-free,
 92 | non-exclusive license:
 93 | 
 94 | (a) under intellectual property rights (other than patent or trademark)
 95 |     Licensable by such Contributor to use, reproduce, make available,
 96 |     modify, display, perform, distribute, and otherwise exploit its
 97 |     Contributions, either on an unmodified basis, with Modifications, or
 98 |     as part of a Larger Work; and
 99 | 
100 | (b) under Patent Claims of such Contributor to make, use, sell, offer
101 |     for sale, have made, import, and otherwise transfer either its
102 |     Contributions or its Contributor Version.
103 | 
104 | 2.2. Effective Date
105 | 
106 | The licenses granted in Section 2.1 with respect to any Contribution
107 | become effective for each Contribution on the date the Contributor first
108 | distributes such Contribution.
109 | 
110 | 2.3. Limitations on Grant Scope
111 | 
112 | The licenses granted in this Section 2 are the only rights granted under
113 | this License. No additional rights or licenses will be implied from the
114 | distribution or licensing of Covered Software under this License.
115 | Notwithstanding Section 2.1(b) above, no patent license is granted by a
116 | Contributor:
117 | 
118 | (a) for any code that a Contributor has removed from Covered Software;
119 |     or
120 | 
121 | (b) for infringements caused by: (i) Your and any other third party's
122 |     modifications of Covered Software, or (ii) the combination of its
123 |     Contributions with other software (except as part of its Contributor
124 |     Version); or
125 | 
126 | (c) under Patent Claims infringed by Covered Software in the absence of
127 |     its Contributions.
128 | 
129 | This License does not grant any rights in the trademarks, service marks,
130 | or logos of any Contributor (except as may be necessary to comply with
131 | the notice requirements in Section 3.4).
132 | 
133 | 2.4. Subsequent Licenses
134 | 
135 | No Contributor makes additional grants as a result of Your choice to
136 | distribute the Covered Software under a subsequent version of this
137 | License (see Section 10.2) or under the terms of a Secondary License (if
138 | permitted under the terms of Section 3.3).
139 | 
140 | 2.5. Representation
141 | 
142 | Each Contributor represents that the Contributor believes its
143 | Contributions are its original creation(s) or it has sufficient rights
144 | to grant the rights to its Contributions conveyed by this License.
145 | 
146 | 2.6. Fair Use
147 | 
148 | This License is not intended to limit any rights You have under
149 | applicable copyright doctrines of fair use, fair dealing, or other
150 | equivalents.
151 | 
152 | 2.7. Conditions
153 | 
154 | Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
155 | in Section 2.1.
156 | 
157 | 3. Responsibilities
158 | -------------------
159 | 
160 | 3.1. Distribution of Source Form
161 | 
162 | All distribution of Covered Software in Source Code Form, including any
163 | Modifications that You create or to which You contribute, must be under
164 | the terms of this License. You must inform recipients that the Source
165 | Code Form of the Covered Software is governed by the terms of this
166 | License, and how they can obtain a copy of this License. You may not
167 | attempt to alter or restrict the recipients' rights in the Source Code
168 | Form.
169 | 
170 | 3.2. Distribution of Executable Form
171 | 
172 | If You distribute Covered Software in Executable Form then:
173 | 
174 | (a) such Covered Software must also be made available in Source Code
175 |     Form, as described in Section 3.1, and You must inform recipients of
176 |     the Executable Form how they can obtain a copy of such Source Code
177 |     Form by reasonable means in a timely manner, at a charge no more
178 |     than the cost of distribution to the recipient; and
179 | 
180 | (b) You may distribute such Executable Form under the terms of this
181 |     License, or sublicense it under different terms, provided that the
182 |     license for the Executable Form does not attempt to limit or alter
183 |     the recipients' rights in the Source Code Form under this License.
184 | 
185 | 3.3. Distribution of a Larger Work
186 | 
187 | You may create and distribute a Larger Work under terms of Your choice,
188 | provided that You also comply with the requirements of this License for
189 | the Covered Software. If the Larger Work is a combination of Covered
190 | Software with a work governed by one or more Secondary Licenses, and the
191 | Covered Software is not Incompatible With Secondary Licenses, this
192 | License permits You to additionally distribute such Covered Software
193 | under the terms of such Secondary License(s), so that the recipient of
194 | the Larger Work may, at their option, further distribute the Covered
195 | Software under the terms of either this License or such Secondary
196 | License(s).
197 | 
198 | 3.4. Notices
199 | 
200 | You may not remove or alter the substance of any license notices
201 | (including copyright notices, patent notices, disclaimers of warranty,
202 | or limitations of liability) contained within the Source Code Form of
203 | the Covered Software, except that You may alter any license notices to
204 | the extent required to remedy known factual inaccuracies.
205 | 
206 | 3.5. Application of Additional Terms
207 | 
208 | You may choose to offer, and to charge a fee for, warranty, support,
209 | indemnity or liability obligations to one or more recipients of Covered
210 | Software. However, You may do so only on Your own behalf, and not on
211 | behalf of any Contributor. You must make it absolutely clear that any
212 | such warranty, support, indemnity, or liability obligation is offered by
213 | You alone, and You hereby agree to indemnify every Contributor for any
214 | liability incurred by such Contributor as a result of warranty, support,
215 | indemnity or liability terms You offer. You may include additional
216 | disclaimers of warranty and limitations of liability specific to any
217 | jurisdiction.
218 | 
219 | 4. Inability to Comply Due to Statute or Regulation
220 | ---------------------------------------------------
221 | 
222 | If it is impossible for You to comply with any of the terms of this
223 | License with respect to some or all of the Covered Software due to
224 | statute, judicial order, or regulation then You must: (a) comply with
225 | the terms of this License to the maximum extent possible; and (b)
226 | describe the limitations and the code they affect. Such description must
227 | be placed in a text file included with all distributions of the Covered
228 | Software under this License. Except to the extent prohibited by statute
229 | or regulation, such description must be sufficiently detailed for a
230 | recipient of ordinary skill to be able to understand it.
231 | 
232 | 5. Termination
233 | --------------
234 | 
235 | 5.1. The rights granted under this License will terminate automatically
236 | if You fail to comply with any of its terms. However, if You become
237 | compliant, then the rights granted under this License from a particular
238 | Contributor are reinstated (a) provisionally, unless and until such
239 | Contributor explicitly and finally terminates Your grants, and (b) on an
240 | ongoing basis, if such Contributor fails to notify You of the
241 | non-compliance by some reasonable means prior to 60 days after You have
242 | come back into compliance. Moreover, Your grants from a particular
243 | Contributor are reinstated on an ongoing basis if such Contributor
244 | notifies You of the non-compliance by some reasonable means, this is the
245 | first time You have received notice of non-compliance with this License
246 | from such Contributor, and You become compliant prior to 30 days after
247 | Your receipt of the notice.
248 | 
249 | 5.2. If You initiate litigation against any entity by asserting a patent
250 | infringement claim (excluding declaratory judgment actions,
251 | counter-claims, and cross-claims) alleging that a Contributor Version
252 | directly or indirectly infringes any patent, then the rights granted to
253 | You by any and all Contributors for the Covered Software under Section
254 | 2.1 of this License shall terminate.
255 | 
256 | 5.3. In the event of termination under Sections 5.1 or 5.2 above, all
257 | end user license agreements (excluding distributors and resellers) which
258 | have been validly granted by You or Your distributors under this License
259 | prior to termination shall survive termination.
260 | 
261 | ************************************************************************
262 | *                                                                      *
263 | *  6. Disclaimer of Warranty                                           *
264 | *  -------------------------                                           *
265 | *                                                                      *
266 | *  Covered Software is provided under this License on an "as is"       *
267 | *  basis, without warranty of any kind, either expressed, implied, or  *
268 | *  statutory, including, without limitation, warranties that the       *
269 | *  Covered Software is free of defects, merchantable, fit for a        *
270 | *  particular purpose or non-infringing. The entire risk as to the     *
271 | *  quality and performance of the Covered Software is with You.        *
272 | *  Should any Covered Software prove defective in any respect, You     *
273 | *  (not any Contributor) assume the cost of any necessary servicing,   *
274 | *  repair, or correction. This disclaimer of warranty constitutes an   *
275 | *  essential part of this License. No use of any Covered Software is   *
276 | *  authorized under this License except under this disclaimer.         *
277 | *                                                                      *
278 | ************************************************************************
279 | 
280 | ************************************************************************
281 | *                                                                      *
282 | *  7. Limitation of Liability                                          *
283 | *  --------------------------                                          *
284 | *                                                                      *
285 | *  Under no circumstances and under no legal theory, whether tort      *
286 | *  (including negligence), contract, or otherwise, shall any           *
287 | *  Contributor, or anyone who distributes Covered Software as          *
288 | *  permitted above, be liable to You for any direct, indirect,         *
289 | *  special, incidental, or consequential damages of any character      *
290 | *  including, without limitation, damages for lost profits, loss of    *
291 | *  goodwill, work stoppage, computer failure or malfunction, or any    *
292 | *  and all other commercial damages or losses, even if such party      *
293 | *  shall have been informed of the possibility of such damages. This   *
294 | *  limitation of liability shall not apply to liability for death or   *
295 | *  personal injury resulting from such party's negligence to the       *
296 | *  extent applicable law prohibits such limitation. Some               *
297 | *  jurisdictions do not allow the exclusion or limitation of           *
298 | *  incidental or consequential damages, so this exclusion and          *
299 | *  limitation may not apply to You.                                    *
300 | *                                                                      *
301 | ************************************************************************
302 | 
303 | 8. Litigation
304 | -------------
305 | 
306 | Any litigation relating to this License may be brought only in the
307 | courts of a jurisdiction where the defendant maintains its principal
308 | place of business and such litigation shall be governed by laws of that
309 | jurisdiction, without reference to its conflict-of-law provisions.
310 | Nothing in this Section shall prevent a party's ability to bring
311 | cross-claims or counter-claims.
312 | 
313 | 9. Miscellaneous
314 | ----------------
315 | 
316 | This License represents the complete agreement concerning the subject
317 | matter hereof. If any provision of this License is held to be
318 | unenforceable, such provision shall be reformed only to the extent
319 | necessary to make it enforceable. Any law or regulation which provides
320 | that the language of a contract shall be construed against the drafter
321 | shall not be used to construe this License against a Contributor.
322 | 
323 | 10. Versions of the License
324 | ---------------------------
325 | 
326 | 10.1. New Versions
327 | 
328 | Mozilla Foundation is the license steward. Except as provided in Section
329 | 10.3, no one other than the license steward has the right to modify or
330 | publish new versions of this License. Each version will be given a
331 | distinguishing version number.
332 | 
333 | 10.2. Effect of New Versions
334 | 
335 | You may distribute the Covered Software under the terms of the version
336 | of the License under which You originally received the Covered Software,
337 | or under the terms of any subsequent version published by the license
338 | steward.
339 | 
340 | 10.3. Modified Versions
341 | 
342 | If you create software not governed by this License, and you want to
343 | create a new license for such software, you may create and use a
344 | modified version of this License if you rename the license and remove
345 | any references to the name of the license steward (except to note that
346 | such modified license differs from this License).
347 | 
348 | 10.4. Distributing Source Code Form that is Incompatible With Secondary
349 | Licenses
350 | 
351 | If You choose to distribute Source Code Form that is Incompatible With
352 | Secondary Licenses under the terms of this version of the License, the
353 | notice described in Exhibit B of this License must be attached.
354 | 
355 | Exhibit A - Source Code Form License Notice
356 | -------------------------------------------
357 | 
358 |   This Source Code Form is subject to the terms of the Mozilla Public
359 |   License, v. 2.0. If a copy of the MPL was not distributed with this
360 |   file, You can obtain one at http://mozilla.org/MPL/2.0/.
361 | 
362 | If it is not possible or desirable to put the notice in a particular
363 | file, then You may include the notice in a location (such as a LICENSE
364 | file in a relevant directory) where a recipient would be likely to look
365 | for such a notice.
366 | 
367 | You may add additional accurate notices of copyright ownership.
368 | 
369 | Exhibit B - "Incompatible With Secondary Licenses" Notice
370 | ---------------------------------------------------------
371 | 
372 |   This Source Code Form is "Incompatible With Secondary Licenses", as
373 |   defined by the Mozilla Public License, v. 2.0.
374 | 


--------------------------------------------------------------------------------
/src/slides.md:
--------------------------------------------------------------------------------
  1 | ---
  2 | title: Fast and Fearless Evolution of Server-Side Web Applications
  3 | author: Oskar Wickström
  4 | date: |
  5 |   \includegraphics[width=3cm]{../../src/mpowered.png}
  6 | theme: Boadilla
  7 | classoption:
  8 |   - dvipsnames
  9 |   - aspectratio=169
 10 | ---
 11 | 
 12 | ## Outline
 13 | 
 14 | * Introduction
 15 | * Web Applications
 16 | * Writing Web Applications with Haskell
 17 |     - Scotty
 18 |     - Yesod
 19 |     - Airship
 20 | * Client-Side Technologies
 21 | 
 22 | \notelist{
 23 |   \item Today, after a high-level introduction, we'll talk about web applications
 24 |   \item Specifically, we will talk about writing webapps in Haskell
 25 |   \item I'll demonstrate some frameworks available
 26 |   \item And say a few words about client-side technologies
 27 | }
 28 | 
 29 | # Introduction
 30 | 
 31 | ## Evolving Software
 32 | 
 33 | * New features
 34 | * Bug fixes
 35 | * Refactoring
 36 | * External factors
 37 |     - New regulation
 38 |     - Deprecation of software and services
 39 | * Recruiting
 40 | 
 41 | \notelist{
 42 |   \item There are many reasons to evolve software
 43 |   \item We will probably have ...
 44 | }
 45 | 
 46 | ## Risks
 47 | 
 48 | * Evolving software, we face risks:
 49 |     - Delay
 50 |     - Error
 51 |     - Burnout
 52 | * These risks make it scary to evolve freely
 53 | 
 54 | \notelist{
 55 |   \item When evolving software, we risk: ...
 56 |   \item These things hurt not only ourselves, but: Customers, partners, internal relations
 57 |   \item The risks make it scary to evolve our software freely
 58 |   \item The change you want to make can be too risky
 59 |   \item I think the fear of evolving software freely has a huge impact on our systems
 60 | }
 61 | 
 62 | ## Tooling
 63 | 
 64 | * We can reduce fear with better tools
 65 |     - Stronger correctness guarantees
 66 |     - Robustness
 67 |     - Faster feedback
 68 |     - Communicates intent
 69 | * Functional programming
 70 | * Type systems
 71 | * Error handling
 72 | 
 73 | # Web Applications
 74 | 
 75 | ## Web Applications
 76 | 
 77 | * Many of us work with the web somehow
 78 | * Single-page apps (SPAs) are in vogue
 79 |     - More like desktop apps
 80 |     - Reinventing parts of the browser
 81 |     - No Javascript, no application
 82 | * Universal webapps (aka "isomorphic")
 83 | 
 84 | \notelist{
 85 |   \item Many of us work with the web in one way or another ... (internet)
 86 |   \item Currently, single-page apps are trendy. These work more like ...
 87 |   \item Now, you might think "What about universal webapps?"
 88 |   \item They are about initial rendering, not about transparently running the same application client-side and server-side
 89 | }
 90 | 
 91 | ## Reminder
 92 | 
 93 | \centering{\Large{$\text{Newer} \not\Longrightarrow \text{Better}$}}
 94 | 
 95 | \notelist{
 96 |   \item This is my friendly reminder: Never does not imply better
 97 |   \item While the single-page app tech is very new and flashy, it might not be a good choice for your project
 98 | }
 99 | 
100 | ## Server-Side Web Applications
101 | 
102 | * Do not dismiss server-side web applications
103 | * Progressive enhancement
104 | * 80/20 rule
105 | * Use client-side code where you need it!
106 | * PJAX
107 | 
108 | \notelist{
109 |   \item I urge you not to dismiss server-side web applications
110 |   \item Rather, have that as a default choice
111 |   \item You can use what's known as "Progressive Enhancement", where ...
112 |   \item Also important to recognize: All code is not equally valuable
113 |   \item Pages for Settings, Login, Documentation, etc
114 |   \item Use client-side code where you need it, where you get a return on the investment
115 |   \item If you want more snappy navigation, things like PJAX go a long way
116 | }
117 | 
118 | ## Static Typing for Server-Side Web
119 | 
120 | * Compile-time checking
121 |     - Run-time robustness with defined behaviour
122 |     - Use types for correct-by-construction
123 |     - Machine-verified living documentation, communicates intent
124 | * Safely evolve our codebase
125 |     - Reduce fear of change throughout the codebase
126 |     - Modify core domain, follow the errors
127 |     - Not split by an API
128 | * Focus tests on our domain
129 |     - No need to write tests for type errors
130 |     - Domain code free of side effects
131 | 
132 | \notelist{
133 |   \item Combining server-side web with static typing, we get a lot of benefits
134 | }
135 | 
136 | ## Functional Statically Typed Web
137 | 
138 | \begin{columns}[T,onlytextwidth]
139 |   \begin{column}{.7\textwidth}
140 |     \begin{minipage}{\textwidth}
141 |       \begin{itemize}
142 |         \item Many languages, many frameworks!
143 |         \item Look for the patterns and safety
144 |         \item Less power is more power
145 |         \item Today's focus is Haskell
146 |       \end{itemize}
147 |     \end{minipage}
148 |   \end{column}
149 |   \begin{column}{.3\textwidth}
150 |     \begin{minipage}{\textwidth}
151 |       \includegraphics[width=2.5cm]{../../src/haskell.png}
152 |     \end{minipage}
153 |   \end{column}
154 | \end{columns}
155 | 
156 | \notelist{
157 |   \item There are many languages and frameworks in this spirit
158 |   \item Base your decisions on the underlying patterns and safety guarantees
159 |   \item This often comes down to: Less power is more power
160 |   \item As Michael explained this morning, as you can't sneak in side-effects in Haskell, libraries like STM can give strong guarantees
161 |   \item My examples will use Haskell for that reason
162 | }
163 | 
164 | # Writing Web Applications with Haskell
165 | 
166 | ## Underpinnings
167 | 
168 | * Web Application Interface (WAI)
169 |     - Common interface betwen web applications and web servers
170 |     - Mix frameworks in one application
171 |     - Comparable with Java Servlet API
172 | * Warp
173 |     - WAI web server
174 |     - Uses GHC's lightweight threads
175 | 
176 | \notelist{
177 |   \item The Haskell web frameworks we'll look at all build on WAI, ...
178 |   \item Warp is a popular and fast web server for WAI
179 | }
180 | 
181 | ## Frameworks
182 | 
183 | * Scotty
184 | * Spock
185 | * Yesod
186 | * Happstack
187 | * Snap
188 | * Airship
189 | * Servant
190 | * MFlow
191 | 
192 | \notelist{
193 |   \item In the Haskell ecosystem, there are many web frameworks.
194 |   \item This list is not exhaustive
195 |   \item We will look at three of these frameworks: Scotty, Yesod, and Airship
196 | }
197 | 
198 | # Scotty
199 | 
200 | ## Scotty
201 | 
202 | * Inspired by Ruby's Sinatra
203 | * Features
204 |     - Routing and parameters
205 |     - Web server setup
206 |     - Extensible
207 | * "Build your own framework"
208 | 
209 | \notelist{
210 |   \item Inspired by Ruby's Sinatra
211 |   \item It provides routing, parameters, and form parsing
212 |   \item It is easy to get started, setting up a web server
213 |   \item Scotty is extensible. I'm not going to say it, but it has to do with the M-word.
214 |   \item Scotty is very small, and if you build something bigger, you'll likely have to "build your own framework"
215 | }
216 | 
217 | ## Scotty Routing
218 | 
219 | ``` {.haskell include=src/listings/scotty-demo/src/Scotty.hs snippet=app}
220 | ```
221 | 
222 | \notelist{
223 |   \item This is a Scotty app with two routes
224 |   \item (explain code)
225 | }
226 | 
227 | ## Scotty Server
228 | 
229 | ``` {.haskell include=src/listings/scotty-demo/src/Scotty.hs snippet=main}
230 | ```
231 | 
232 | \notelist{
233 |   \item This is how we run it
234 |   \item Now, usually you need to render larger chunks of HTML
235 | }
236 | 
237 | ## HTML Templates
238 | 
239 | ``` {.haskell}
240 | get "/greet-with-template/:who" $ do
241 |   who <- param "who"
242 |   html $
243 |        "<!DOCTYPE html>\
244 |        \<html lang=\"en\">\
245 |        \<head>\
246 |        \  <meta charset=\"UTF-8\">\
247 |        \  <title>My Page</title>\
248 |        \  <link rel=\"stylesheet\"\
249 |        \        href=" <> bootstrapCss <> "\">\
250 |        \</head>\
251 |        \<body>\
252 |        \  <div class=\"jumbotron\">\
253 |        \     <h1>Hello, " <> who <> "!</h1>\
254 |        \  </div>\
255 |        \</body>\
256 |        \</html>"
257 | ```
258 | 
259 | \notelist{
260 |   \item Let's say we do this
261 |   \item It is very hard to read
262 |   \item Sure, we could refactor to separate view functions
263 |   \item The bigger issue is that we're doing stringly-typed programming
264 |   \item \textbf{Can anyone tell me what's wrong here?}
265 | }
266 | 
267 | ## HTML Template Error!
268 | 
269 | \begin{textblock*}{0cm}(2.5cm,4.0cm)
270 | \begin{tikzpicture}
271 | \node at(0, 0) [draw, stringcolor,line width=3pt,ellipse, minimum width=80pt, minimum height=20pt]{};
272 | \end{tikzpicture}
273 | \end{textblock*}
274 | 
275 | ``` {.haskell}
276 | get "/greet-with-template/:who" $ do
277 |   who <- param "who"
278 |   html $
279 |        "<!DOCTYPE html>\
280 |        \<html lang=\"en\">\
281 |        \<head>\
282 |        \  <meta charset=\"UTF-8\">\
283 |        \  <title>My Page</title>\
284 |        \  <link rel=\"stylesheet\"\
285 |        \        href=" <> bootstrapCss <> "\">\
286 |        \</head>\
287 |        \<body>\
288 |        \  <div class=\"jumbotron\">\
289 |        \     <h1>Hello, " <> who <> "!</h1>\
290 |        \  </div>\
291 |        \</body>\
292 |        \</html>"
293 | ```
294 | 
295 | \notelist{
296 |   \item We are missing an escaped double quote here
297 |   \item The string literal's quote makes it extra hard to see
298 |   \item So, let's not do this.
299 | }
300 | 
301 | ## DSLs for HTML
302 | 
303 | * Instead of HTML in strings, we use DSLs
304 | * Embedded:
305 |     - Blaze
306 |     - Lucid
307 | * External:
308 |     - Heist
309 |     - Hamlet
310 | * Type safety
311 | * Composable
312 | 
313 | \notelist{
314 |   \item Instead we use a markup DSL
315 |   \item There are embedded and external DSLs for HTML
316 |   \item Embedded means the markup is written in regular Haskell, in Haskell source files
317 |   \item Two popular libraries are Blaze and Lucid
318 |   \item For external HTML templating languages, we can use Heist or Hamlet
319 |   \item The external ones are typically written in separate files, but can also be embedded using quasi-quoting
320 |   \item These languages give us type-safe templates that are composable
321 |   \item They help us produce valid HTML
322 | }
323 | 
324 | ## Lucid HTML Template
325 | 
326 | ``` {.haskell include=src/listings/scotty-demo/src/Scotty.hs snippet=lucid-template}
327 | ```
328 | 
329 | \notelist{
330 |   \item Here we see the equivalent template in Lucid
331 |   \item Elements are nested using function application
332 |   \item Elements are juxtaposed using do notation
333 |   \item Attributes are set using a list of pairs
334 |   \item Notice how some functions do not take any child content
335 |   \item `meta` and `link` in HTML are empty elements
336 |   \item In this way, Lucid and the type system help us construct valid HTML
337 | }
338 | 
339 | ## Rendering Lucid with Scotty
340 | 
341 | ``` {.haskell include=src/listings/scotty-demo/src/Scotty.hs snippet=lucid-handler dedent=2}
342 | ```
343 | 
344 | \notelist{
345 |   \item We can render Lucid in a handler like this
346 | }
347 | 
348 | ## Result
349 | 
350 | ![](../../src/lucid-hello.png){width=75%}
351 | 
352 | \notelist{
353 |   \item Looking at the result in a web browser, we can inspect the rendered HTML
354 | }
355 | 
356 | ## Side Effects in Scotty
357 | 
358 | * We need more than sending HTML responses
359 | * We want to do IO:
360 |     - Database queries
361 |     - Logging
362 |     - External service calls
363 | * IO in Scotty handlers using `liftIO`
364 | 
365 | \notelist{
366 |   \item So far, we have only sent HTML over the wire
367 |   \item We most likely need side-effects to do something useful
368 |   \item (read list)
369 |   \item We use `liftIO` in Scotty handlers to do IO
370 | }
371 | 
372 | ## IO in Scotty
373 | 
374 | * Given these definitions:
375 | 
376 |     ``` {.haskell include=src/listings/scotty-demo/src/Scotty.hs snippet=addNewComment}
377 |     ```
378 | * We can \textit{lift} the IO action into a handler:
379 | 
380 |     ``` {.haskell include=src/listings/scotty-demo/src/Scotty.hs snippet=article-handler dedent=2}
381 |     ```
382 | 
383 | \notelist{
384 |   \item Let's look at an example of using `liftIO`
385 |   \item Given these definitions... (explain rest)
386 | }
387 | 
388 | 
389 | ## Starting with Scotty
390 | 
391 | * Easy to get started, learn the basics
392 | * What you don't get:
393 |     - Templating
394 |     - Sessions
395 |     - Authentication and Authorization
396 |     - Logging
397 |     - Persistence
398 | * Have a look at Spock\fnote{\url{https://www.spock.li}} for more features
399 | 
400 | \notelist{
401 |   \item I recommend starting out with Scotty if you're new to Haskell web development
402 |   \item Once your applications grows, you will probably need to bring in libraries
403 |   \item You might need to bring in ... (read list)
404 |   \item For a slightly larger feature set, and type-safe routing, have a look at Spock
405 | }
406 | 
407 | # Yesod
408 | 
409 | ## Yesod
410 | 
411 | * "One-stop shop" for Haskell web development
412 |     - A framework
413 |     - Batteries included
414 |     - Still very modular
415 | * Also runs on WAI
416 | 
417 | \notelist {
418 |   \item Yesod can be called a "one-stop shop" for Haskell web development
419 |   \item It is a framework with many batteries included
420 |   \item Still, it is implemented to be modular
421 |   \item Things are there by default, but you can swap them out if you need
422 |   \item Yesod runs on WAI using the Warp server
423 | }
424 | 
425 | ## Batteries Included with Yesod
426 | 
427 | \begin{columns}[T,onlytextwidth]
428 |   \begin{column}{.5\textwidth}
429 |     \begin{minipage}{\textwidth}
430 |       \begin{itemize}
431 |         \item Type-safe routing
432 |         \item External templates for:
433 |           \begin{itemize}
434 |             \item HTML
435 |             \item CSS
436 |             \item Javascript (and TypeScript)
437 |           \end{itemize}
438 |         \item Widgets
439 |         \item Forms
440 |         \item Sessions
441 |       \end{itemize}
442 |     \end{minipage}
443 |   \end{column}
444 |   \begin{column}{.5\textwidth}
445 |     \begin{minipage}{\textwidth}
446 |       \begin{itemize}
447 |         \item Integration with Persistent
448 |         \item Authentication and Authorization
449 |         \item Internationalization
450 |         \item Logging
451 |         \item Configuration
452 |         \item Auto-reloading web server
453 |       \end{itemize}
454 |     \end{minipage}
455 |   \end{column}
456 | \end{columns}
457 | 
458 | \notelist {
459 |   \item These are some of the features you get ... (read list)
460 | }
461 | 
462 | ## Getting Started
463 | 
464 | * Use a template (see `stack templates`)
465 | * There will be things you don't understand at first
466 | * Start out exploring:
467 |     - Routing
468 |     - Templates (HTML, CSS, Javascript)
469 |     - The "Foundation" type
470 |     - Getting something done!
471 | * Over time, you'll understand the scaffolding
472 | * Use the auto-reloading web server
473 |     - Install `yesod-bin`, run `yesod devel`
474 | 
475 | \notelist {
476 |   \item I recommend starting by using a template
477 |   \item (read list)
478 | }
479 | 
480 | ## Routes Configuration
481 | 
482 | ``` {.changelog include=src/listings/yesod-demo/config/routes snippet=routes}
483 | ```
484 | 
485 | \notelist {
486 |   \item Routes are configured in a separate file
487 |   \item We define a root path ...
488 | }
489 | 
490 | ## A Simple Handler
491 | 
492 | ``` {.haskell include=src/listings/yesod-demo/src/Handler/Home.hs snippet=get-home-handler}
493 | ```
494 | 
495 | \notelist {
496 |   \item The handler for a route is found by a naming convention
497 |   \item "HomeR GET" corresponds to the "getHomeR" definition
498 | }
499 | 
500 | ## Hamlet Template
501 | 
502 | ``` {.hamlet include=src/listings/yesod-demo/templates/homepage.hamlet}
503 | ```
504 | 
505 | \notelist {
506 |   \item This is "homepage.hamlet"
507 | }
508 | 
509 | ## Routing with Path Pieces
510 | 
511 | ``` {.haskell include=src/listings/yesod-demo/src/Handler/Home.hs snippet=get-article-handler}
512 | ```
513 | 
514 | \notelist {
515 |   \item Routes with "PathPieces" captured have handlers with arguments
516 |   \item The route for a particular article captured an "ArticleId" in the routes file
517 |   \item This handler therefore has an "ArticleId" argument
518 | }
519 | 
520 | ## Article Hamlet Template
521 | 
522 | ``` {.hamlet include=src/listings/yesod-demo/templates/article.hamlet}
523 | ```
524 | 
525 | ## Widgets
526 | 
527 | * Reusable components of HTML, CSS, and Javascript
528 | * We used widgets in handlers:
529 | 
530 | 	```{.haskell}
531 |   $(widgetFile "article")
532 | 	```
533 | 
534 | * Yesod tries to find matching widget files:
535 | 
536 | 	```{.changelog}
537 | 	templates/article.hamlet
538 | 	templates/article.cassius
539 | 	templates/article.lucius
540 | 	templates/article.julius
541 | 	```
542 | 
543 | * Can refer to bindings in Haskell code
544 | * Only include small parts, or use external resources
545 | 
546 | \notelist {
547 |   \item Let's have a look at the concept of a "Widget"
548 |   \item (read list)
549 | }
550 | 
551 | ## Lucius (CSS Templates)
552 | 
553 | ``` {.css include=src/listings/yesod-demo/templates/article.lucius}
554 | ```
555 | 
556 | \notelist {
557 |   \item Here's some simple styling of comments
558 |   \item This is a Lucius file
559 |   \item You can interpolate Haskell values, but I'm not doing that here
560 | }
561 | 
562 | ## Home Page Result
563 | 
564 | ![](../../src/yesod-home.png){width=75%}
565 | 
566 | \notelist {
567 |   \item Using a web browser, the home page looks like this
568 | }
569 | 
570 | ## Article Page Result
571 | 
572 | ![](../../src/yesod-article.png){width=75%}
573 | 
574 | \notelist {
575 |   \item And the article page now has comments rendered
576 | }
577 | 
578 | ## Yesod Forms
579 | 
580 | * Write forms using applicative or monadic style
581 | * Use the same structure for rendering, parsing, and validation
582 | * There are various renderers available
583 | 
584 | \notelist {
585 |   \item The next powerful feature of Yesod that I want to show is forms
586 |   \item (read list)
587 | }
588 | 
589 | ## Comment Form
590 | 
591 | ``` {.haskell include=src/listings/yesod-demo/src/Handler/Home.hs snippet=comment-form}
592 | ```
593 | 
594 | \notelist {
595 |   \item This is a definition of a Yesod Form
596 |   \item It is a form for Comments
597 |   \item It has a text field for the commenter name
598 |   \item And it has a text area for the comment contents
599 |   \item This is a single definition for both rendering the form, and parsing incoming form data
600 | }
601 | 
602 | ## Rendering a Form
603 | 
604 | ``` {.haskell include=src/listings/yesod-demo/src/Handler/Home.hs snippet=get-article-with-form-handler}
605 | ```
606 | 
607 | \notelist {
608 |   \item Here's how we use the form in a handler
609 |   \item First, we get the article and its comments
610 |   \item Then, we use "generateFormPost"
611 |   \item We get a widget back, that is included in the HTML template below
612 | }
613 | 
614 | ## Including The Form Widget
615 | 
616 | ``` {.hamlet}
617 | <form role=form
618 |       method=post
619 |       action=@{ArticleCommentsR id'}
620 |       enctype=#{commentFormEnc}>
621 |   ^{commentFormWidget}
622 |   <button type="submit" .btn .btn-default>Submit
623 | ```
624 | 
625 | ## Parsing and Validating the Form
626 | 
627 | ``` {.haskell include=src/listings/yesod-demo/src/Handler/Home.hs snippet=article-comment-handler}
628 | ```
629 | 
630 | \notelist {
631 |   \item The POST handler uses "runFormPost" to parse the form data, and render a new form
632 |   \item If it was success in parsing it, we add the comment and redirect back
633 |   \item Otherwise, we rerender the form
634 |   \item The neat thing is that Yesod will render validation errors automatically
635 | }
636 | 
637 | ## Comment Form Result
638 | 
639 | ![](../../src/yesod-form.png){width=75%}
640 | 
641 | \notelist {
642 |   \item In the browser, we see the rendered form
643 | }
644 | 
645 | ## Yesod Recap
646 | 
647 | * Very capable, hit the ground running
648 | * We only looked at some core features
649 | * Worth learning
650 | 
651 | \notelist{
652 |   \item To summarize the part on Yesod ...
653 |   \item Yesod has much of you might need
654 |   \item You don't have to build your own framework, at least not for some time
655 |   \item I think it's worth learning if you want to build web apps in Haskell
656 |   \item But if you're beginning Haskell, start with Scotty or Spock
657 | }
658 | 
659 | # Airship
660 | 
661 | \notelist {
662 |   \item The last framework we'll look at is Airship
663 | }
664 | 
665 | ## Airship
666 | 
667 | * Inspired by Webmachine from Erlang
668 | * Define RESTful resources
669 | * Override fields in the default resource
670 | * Tie together resources with routing
671 | 
672 | \notelist {
673 |   \item Airship is inspired by Webmachine from Erlang
674 |   \item It is centered around RESTful resources
675 |   \item You use the default resource, which does all the sensible defaults
676 |   \item Then you override methods to implement your resource
677 |   \item Resources are tied together using a routing DSL (...)
678 | }
679 | 
680 | ## Airship Routes
681 | 
682 | ``` {.haskell include=src/listings/airship-demo/src/Main.hs snippet=app-routes}
683 | ```
684 | 
685 | \notelist {
686 |   \item In this example, we define two routes ...
687 | }
688 | 
689 | ## Defining Resources
690 | 
691 | ``` {.haskell}
692 | articleResource :: Resource IO
693 | articleResource =
694 |   defaultResource
695 |   {
696 | 	-- overrides ...
697 |   }
698 | ```
699 | 
700 | \notelist {
701 |   \item A resource overrides fields in the default resource
702 | }
703 | 
704 | ## resourceExists
705 | 
706 | ``` {.changelog}
707 | ...
708 | ```
709 | 
710 | ``` {.haskell include=src/listings/airship-demo/src/Main.hs snippet=resourceExists}
711 | ```
712 | 
713 | ``` {.changelog}
714 | ...
715 | ```
716 | 
717 | \notelist {
718 |   \item This overrides basically answers: is this a 404 Not Found?
719 | }
720 | 
721 | ## contentTypesProvided
722 | 
723 | ``` {.changelog}
724 | ...
725 | ```
726 | 
727 | ``` {.haskell include=src/listings/airship-demo/src/Main.hs snippet=contentTypesProvided}
728 | ```
729 | 
730 | ``` {.changelog}
731 | ...
732 | ```
733 | 
734 | \notelist {
735 |   \item This override is a bit more involved
736 |   \item Here we bind a special function for constructing an HTML response
737 |   \item Then, in case the content type is text/html, we get the article, and render it
738 |   \item If it has another content type, based on the Accept header, we do nothing
739 |   \item Airship handles that for us
740 | }
741 | 
742 | ## 404 Not Found
743 | 
744 | ``` bash
745 | $ curl -i 'localhost:3000'
746 | HTTP/1.1 404 Not Found
747 | Transfer-Encoding: chunked
748 | Date: Tue, 12 Dec 2017 15:43:29 GMT
749 | Server: Warp/3.2.13
750 | Content-Type: text/html
751 | 
752 | Not found!
753 | ```
754 | 
755 | \notelist {
756 |   \item Let's test our server using curl
757 |   \item Requesting a non-existing resource we get 404 Not Found
758 | }
759 | 
760 | ## 405 Method Not Allowed
761 | 
762 | ``` bash
763 | $ curl -i -X PUT 'localhost:3000/articles/1'
764 | HTTP/1.1 405 Method Not Allowed
765 | Transfer-Encoding: chunked
766 | Date: Tue, 12 Dec 2017 15:44:21 GMT
767 | Server: Warp/3.2.13
768 | Allow: GET,HEAD,POST
769 | ```
770 | 
771 | \notelist {
772 |   \item Requesting the article with PUT we get 405 Method Not Allowed
773 | }
774 | 
775 | ## 406 Not Acceptable
776 | 
777 | ``` bash
778 | $ curl -i -H 'Accept: text/plain' 'localhost:3000/articles/1'
779 | HTTP/1.1 406 Not Acceptable
780 | Transfer-Encoding: chunked
781 | Date: Tue, 12 Dec 2017 15:48:27 GMT
782 | Server: Warp/3.2.13
783 | ```
784 | 
785 | \notelist {
786 |   \item Passing "Accept: text/plain", we get 406 Not Acceptable
787 | }
788 | 
789 | ## 200 OK
790 | 
791 | ``` bash
792 | $ curl -i 'localhost:3000/articles/1'
793 | HTTP/1.1 200 OK
794 | Transfer-Encoding: chunked
795 | Date: Tue, 12 Dec 2017 15:45:29 GMT
796 | Server: Warp/3.2.13
797 | Content-Type: text/html
798 | 
799 | <h1>Airship Webmachines!</h1><p>Lorem ipsum...</p>
800 | ```
801 | 
802 | \notelist {
803 |   \item And finally, we can do a GET request and get the HTML
804 | }
805 | 
806 | ## Airship Overrides
807 | 
808 | ```{.changelog}
809 | allowMissingPost           lastModified
810 | allowedMethods             languageAvailable
811 | contentTypesAccepted       malformedRequest
812 | contentTypesProvided       movedPermanently
813 | deleteCompleted            movedTemporarily
814 | deleteResource             multipleChoices
815 | entityTooLarge             previouslyExisted
816 |   forbidden                  processPost
817 | generateETag               resourceExists
818 | implemented                serviceAvailable
819 | isAuthorized               uriTooLong
820 | isConflict                  validContentHeaders
821 | knownContentType
822 | ```
823 | 
824 | \notelist {
825 |   \item I only showed you two, but there are many more overrides
826 | }
827 | 
828 | ## Airship Considerations
829 | 
830 | * It is more low-level/barebones
831 | * Again, "build your own framework"
832 | * Suited for RESTful APIs
833 | 
834 | \notelist {
835 |   \item Airship is a bit rough on the edges
836 |   \item I didn't show you the setup to get it running
837 |   \item It requires some effort to integrate with other libraries
838 |   \item But if you're building a RESTful API, Airship might be a great choice!
839 | }
840 | 
841 | # Client-Side Technologies
842 | 
843 | ## Client-Side Technologies
844 | 
845 | Need to do a single-page app?
846 | 
847 | * PureScript, Elm, etc
848 | * Consider Haskell for your backend
849 | * With Servant, you can use `servant-purescript` or `servant-elm`
850 | 
851 | \notelist {
852 |   \item If you need to do a single-page app, or a single-page component of a greater system, consider...
853 |   \item These are in the same spirit, more or less
854 |   \item Consider Haskell for your backend, even it's only serving JSON
855 |   \item You can use all the frameworks I've shown to build web APIs
856 |   \item Also, there is Servant, to get a lot of type-safety in web APIs
857 |   \item Servant can be integrated with PureScript and Elm to share types
858 | }
859 | 
860 | # Summary
861 | 
862 | \notelist {
863 |   \item I'd like to end this talk with some key takeaways
864 | }
865 | 
866 | ##
867 | 
868 | \centering{
869 |   \includegraphics[width=4cm]{../../src/brain.png}
870 |   \Large{Evolve software fearlessly using better tools \\ for modeling and communication.}
871 | }
872 | 
873 | \notelist {
874 |   \item Evolve software fearlessly using better tools for modeling and communication.
875 |   \item Your program is a communication between you, your colleagues, and the computer
876 |   \item Use tools that support that communication
877 |   \item Use tools that support \textbf{evolving} your ideas, not only implementing your first idea
878 | }
879 | 
880 | ##
881 | 
882 | \centering{
883 |   \includegraphics[width=5cm]{../../src/tokens.jpeg}
884 |   \vspace{.5cm}
885 |   \Large{Spend your complexity budget carefully.}
886 | }
887 | 
888 | \notelist {
889 |   \item Spend your complexity budget carefully.
890 |   \item Large parts of your web application are of lower value than core business parts
891 |   \item Reach for simple tools with less risk in those areas
892 |   \item When needed, use more advanced and complex tools where you get return on investment
893 | }
894 | 
895 | ##
896 | 
897 | \centering{
898 |   \includegraphics[width=2cm]{../../src/mwa-logo.png}
899 |   \vspace{.5cm}
900 |   \Large{Explore the wonderful world of functional\\and statically typed server-side web.}
901 | }
902 | 
903 | \notelist {
904 |   \item There is so much good stuff in statically typed functional programming
905 |   \item Combine that with server-side web development and you have a very good toolbox
906 |   \item Thank you for listening! Here are links to...
907 | }
908 | 
909 | ## Links
910 | 
911 | * Slides and code: [github.com/owickstrom/fast-and-fearless-evolution-of-server-side-webapps](https://github.com/owickstrom/fast-and-fearless-evolution-of-server-side-webapps)
912 | * Website: [https://wickstrom.tech](https://wickstrom.tech)
913 | * Twitter: [\@owickstrom](https://twitter.com/owickstrom)
914 | 
915 | # Questions?
916 | 


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