├── .github └── workflows │ └── swift.yml ├── .gitignore ├── CONTRIBUTING.md ├── LICENSE ├── Makefile ├── Package.swift ├── README.md └── Sources ├── MacroLambda ├── LambdaExpress.swift └── ReExports.swift └── MacroLambdaCore ├── LambdaNIOConversions.swift ├── LambdaRequest.swift ├── LambdaResponse.swift ├── LambdaServer.swift ├── Process.swift ├── README.md └── lambda.swift /.github/workflows/swift.yml: -------------------------------------------------------------------------------- 1 | name: Build and Test 2 | 3 | on: 4 | push: 5 | pull_request: 6 | schedule: 7 | - cron: "25 9 * * 1" 8 | 9 | jobs: 10 | linux: 11 | runs-on: ubuntu-latest 12 | strategy: 13 | fail-fast: false 14 | matrix: 15 | image: 16 | - swift:5.9.2-focal 17 | - swift:5.10-jammy 18 | - swift:6.0-noble 19 | container: ${{ matrix.image }} 20 | steps: 21 | - name: Checkout Repository 22 | uses: actions/checkout@v4 23 | - name: Build Swift Debug Package 24 | run: swift build -c debug 25 | - name: Build Swift Release Package 26 | run: swift build -c release 27 | nextstep: 28 | runs-on: macos-latest 29 | steps: 30 | - name: Select latest available Xcode 31 | uses: maxim-lobanov/setup-xcode@v1.5.1 32 | with: 33 | xcode-version: latest 34 | - name: Checkout Repository 35 | uses: actions/checkout@v4 36 | - name: Build Swift Debug Package 37 | run: swift build -c debug 38 | - name: Build Swift Release Package 39 | run: swift build -c release 40 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # Xcode 2 | # 3 | # gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore 4 | 5 | ## User settings 6 | xcuserdata/ 7 | 8 | ## compatibility with Xcode 8 and earlier (ignoring not required starting Xcode 9) 9 | *.xcscmblueprint 10 | *.xccheckout 11 | 12 | ## compatibility with Xcode 3 and earlier (ignoring not required starting Xcode 4) 13 | build/ 14 | DerivedData/ 15 | *.moved-aside 16 | *.pbxuser 17 | !default.pbxuser 18 | *.mode1v3 19 | !default.mode1v3 20 | *.mode2v3 21 | !default.mode2v3 22 | *.perspectivev3 23 | !default.perspectivev3 24 | 25 | ## Obj-C/Swift specific 26 | *.hmap 27 | 28 | ## App packaging 29 | *.ipa 30 | *.dSYM.zip 31 | *.dSYM 32 | 33 | ## Playgrounds 34 | timeline.xctimeline 35 | playground.xcworkspace 36 | 37 | # Swift Package Manager 38 | # 39 | # Add this line if you want to avoid checking in source code from Swift Package Manager dependencies. 40 | # Packages/ 41 | # Package.pins 42 | # Package.resolved 43 | # *.xcodeproj 44 | # 45 | # Xcode automatically generates this directory with a .xcworkspacedata file and xcuserdata 46 | # hence it is not needed unless you have added a package configuration file to your project 47 | # .swiftpm 48 | 49 | .build/ 50 | 51 | # CocoaPods 52 | # 53 | # We recommend against adding the Pods directory to your .gitignore. However 54 | # you should judge for yourself, the pros and cons are mentioned at: 55 | # https://guides.cocoapods.org/using/using-cocoapods.html#should-i-check-the-pods-directory-into-source-control 56 | # 57 | # Pods/ 58 | # 59 | # Add this line if you want to avoid checking in source code from the Xcode workspace 60 | # *.xcworkspace 61 | 62 | # Carthage 63 | # 64 | # Add this line if you want to avoid checking in source code from Carthage dependencies. 65 | # Carthage/Checkouts 66 | 67 | Carthage/Build/ 68 | 69 | # Accio dependency management 70 | Dependencies/ 71 | .accio/ 72 | 73 | # fastlane 74 | # 75 | # It is recommended to not store the screenshots in the git repo. 76 | # Instead, use fastlane to re-generate the screenshots whenever they are needed. 77 | # For more information about the recommended setup visit: 78 | # https://docs.fastlane.tools/best-practices/source-control/#source-control 79 | 80 | fastlane/report.xml 81 | fastlane/Preview.html 82 | fastlane/screenshots/**/*.png 83 | fastlane/test_output 84 | 85 | # Code Injection 86 | # 87 | # After new code Injection tools there's a generated folder /iOSInjectionProject 88 | # https://github.com/johnno1962/injectionforxcode 89 | 90 | iOSInjectionProject/ 91 | 92 | # hh 93 | Package.resolved 94 | xcuserdata 95 | .docker.build 96 | .swiftpm 97 | 98 | -------------------------------------------------------------------------------- /CONTRIBUTING.md: -------------------------------------------------------------------------------- 1 | ## Legal 2 | 3 | By submitting a pull request, you represent that you have the right to license 4 | your contribution to ZeeZide and the community, and agree by submitting the patch 5 | that your contributions are licensed under the Apache 2.0 license. 6 | 7 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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The text should be enclosed in the appropriate 184 | comment syntax for the file format. We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright 2020 ZeeZide GmbH 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | -------------------------------------------------------------------------------- /Makefile: -------------------------------------------------------------------------------- 1 | # Makefile 2 | 3 | # local config 4 | SWIFT_BUILD=swift build 5 | SWIFT_CLEAN=swift package clean 6 | SWIFT_BUILD_DIR=.build 7 | SWIFT_TEST=swift test 8 | CONFIGURATION=release 9 | 10 | # docker config 11 | SWIFT_BUILD_IMAGE="swift:5.2.4" 12 | DOCKER_BUILD_DIR=".docker.build" 13 | SWIFT_DOCKER_BUILD_DIR="$(DOCKER_BUILD_DIR)/x86_64-unknown-linux/$(CONFIGURATION)" 14 | DOCKER_BUILD_PRODUCT="$(DOCKER_BUILD_DIR)/$(TOOL_NAME)" 15 | 16 | 17 | SWIFT_SOURCES=\ 18 | Sources/*/*/*.swift \ 19 | Sources/*/*/*/*.swift 20 | 21 | all: 22 | $(SWIFT_BUILD) -c $(CONFIGURATION) 23 | 24 | # Cannot test in `release` configuration?! 25 | test: 26 | $(SWIFT_TEST) 27 | 28 | clean : 29 | $(SWIFT_CLEAN) 30 | # We have a different definition of "clean", might be just German 31 | # pickyness. 32 | rm -rf $(SWIFT_BUILD_DIR) 33 | 34 | $(DOCKER_BUILD_PRODUCT): $(SWIFT_SOURCES) 35 | docker run --rm \ 36 | -v "$(PWD):/src" \ 37 | -v "$(PWD)/$(DOCKER_BUILD_DIR):/src/.build" \ 38 | "$(SWIFT_BUILD_IMAGE)" \ 39 | bash -c 'cd /src && swift build -c $(CONFIGURATION)' 40 | 41 | docker-all: $(DOCKER_BUILD_PRODUCT) 42 | 43 | docker-clean: 44 | rm $(DOCKER_BUILD_PRODUCT) 45 | 46 | docker-distclean: 47 | rm -rf $(DOCKER_BUILD_DIR) 48 | 49 | distclean: clean docker-distclean 50 | 51 | docker-emacs: 52 | docker run --rm -it \ 53 | -v "$(PWD):/src" \ 54 | -v "$(PWD)/$(DOCKER_BUILD_DIR):/src/.build" \ 55 | "$(SWIFT_BUILD_IMAGE)" \ 56 | emacs /src 57 | -------------------------------------------------------------------------------- /Package.swift: -------------------------------------------------------------------------------- 1 | // swift-tools-version:5.5 2 | 3 | import PackageDescription 4 | 5 | let package = Package( 6 | 7 | name: "MacroLambda", 8 | 9 | products: [ 10 | .library(name: "MacroLambdaCore", targets: [ "MacroLambdaCore" ]), 11 | .library(name: "MacroLambda", targets: [ "MacroLambda" ]) 12 | ], 13 | 14 | dependencies: [ 15 | .package(url: "https://github.com/Macro-swift/Macro.git", 16 | from: "1.0.0"), 17 | .package(url: "https://github.com/Macro-swift/MacroExpress.git", 18 | from: "1.0.0"), 19 | .package(url: "https://github.com/swift-server/swift-aws-lambda-runtime.git", 20 | from: "0.5.2") 21 | ], 22 | 23 | targets: [ 24 | .target(name: "MacroLambdaCore", dependencies: [ 25 | .product(name: "MacroCore" , package: "Macro"), 26 | .product(name: "http" , package: "Macro"), 27 | .product(name: "express" , package: "MacroExpress"), 28 | .product(name: "AWSLambdaRuntime" , package: "swift-aws-lambda-runtime"), 29 | .product(name: "AWSLambdaEvents" , package: "swift-aws-lambda-runtime") 30 | ], 31 | exclude: [ 32 | "README.md" 33 | ]), 34 | .target(name: "MacroLambda", dependencies: [ 35 | "MacroLambdaCore", 36 | .product(name: "AWSLambdaRuntime" , package: "swift-aws-lambda-runtime"), 37 | "MacroExpress" 38 | ]) 39 | ] 40 | ) 41 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 |

MacroLambda 2 | 4 |

5 | 6 | AWS Lambda [API Gateway](https://aws.amazon.com/api-gateway/) 7 | Support for Macro and MacroExpress 8 | (and all things built on-top). 9 | 10 | It allows deployment of arbitrary Macro applications as AWS Lambda functions, 11 | including MacroApp endpoints. 12 | 13 | Blog article: [Deploying Swift on AWS Lambda](http://www.alwaysrightinstitute.com/macrolambda/). 14 | 15 | The module is split into the `MacroLambda` module, 16 | which provides the Express runner (`Lambda.run(express-app)`) 17 | and `MacroLambdaCore` which only links against `http` and provides the 18 | `lambda.createServer` (the peer to `http.createServer`). 19 | 20 | There is a tutorial on getting started with those things: 21 | [Create your first HTTP endpoint with Swift on AWS Lambda](https://fabianfett.de/swift-on-aws-lambda-creating-your-first-http-endpoint). 22 | 23 | Note: The Swift Lambda Runtime requires Swift 5.2. 24 | 25 | ## Example 26 | 27 | ```swift 28 | import MacroLambda 29 | 30 | let app = Express() 31 | 32 | app.use(bodyParser.text()) 33 | 34 | app.post("/hello") { req, res, next in 35 | console.log("Client posted:", req.body.text ?? "-") 36 | res.send("Client body sent: \(req.body.text ?? "~nothing~")") 37 | } 38 | 39 | app.get { req, res, next in 40 | res.send("Welcome to Macro!") 41 | } 42 | 43 | Lambda.run(app) 44 | ``` 45 | 46 | ## Deployment 47 | 48 | Using `swift lambda` (`brew install SPMDestinations/tap/swift-lambda`): 49 | ``` 50 | $ swift lambda deploy -d 5.2 51 | ``` 52 | Tutorial available: [Deploying Swift on AWS Lambda](http://www.alwaysrightinstitute.com/macrolambda/). 53 | 54 | ## Environment Variables 55 | 56 | - `macro.core.numthreads` 57 | - `macro.core.iothreads` 58 | - `macro.core.retain.debug` 59 | - `macro.concat.maxsize` 60 | - `macro.streams.debug.rc` 61 | 62 | ### Links 63 | 64 | - [Deploying Swift on AWS Lambda](http://www.alwaysrightinstitute.com/macrolambda/) 65 | - WWDC 2020: [Use Swift on AWS Lambda with Xcode](https://developer.apple.com/videos/play/wwdc2020/10644/) 66 | - Tutorial: [Create your first HTTP endpoint with Swift on AWS Lambda](https://fabianfett.de/swift-on-aws-lambda-creating-your-first-http-endpoint) 67 | - [Swift AWS Lambda Runtime](https://github.com/swift-server/swift-aws-lambda-runtime) 68 | - Amazon Web Services [API Gateway](https://aws.amazon.com/api-gateway/) 69 | - [µExpress](http://www.alwaysrightinstitute.com/microexpress-nio2/) 70 | - [SwiftNIO](https://github.com/apple/swift-nio) 71 | 72 | ### Who 73 | 74 | **Macro** is brought to you by 75 | [Helge Heß](https://github.com/helje5/) / [ZeeZide](https://zeezide.de). 76 | We like feedback, GitHub stars, cool contract work, 77 | presumably any form of praise you can think of. 78 | 79 | There is a `#microexpress` channel on the 80 | [Noze.io Slack](http://slack.noze.io/). Feel free to join! 81 | -------------------------------------------------------------------------------- /Sources/MacroLambda/LambdaExpress.swift: -------------------------------------------------------------------------------- 1 | // 2 | // ReExports.swift 3 | // MacroLambda 4 | // 5 | // Created by Helge Heß 6 | // Copyright © 2020 ZeeZide GmbH. All rights reserved. 7 | // 8 | 9 | import enum AWSLambdaRuntime.Lambda 10 | 11 | public extension Lambda { 12 | 13 | static func run(_ middleware: MiddlewareObject) -> Never { 14 | let server = lambda.createServer(handler: middleware.requestHandler) 15 | _ = server.run() 16 | } 17 | } 18 | -------------------------------------------------------------------------------- /Sources/MacroLambda/ReExports.swift: -------------------------------------------------------------------------------- 1 | // 2 | // ReExports.swift 3 | // MacroLambda 4 | // 5 | // Created by Helge Heß 6 | // Copyright © 2020 ZeeZide GmbH. All rights reserved. 7 | // 8 | 9 | @_exported import MacroCore 10 | @_exported import MacroExpress 11 | 12 | import enum MacroLambdaCore.lambda 13 | public typealias lambda = MacroLambdaCore.lambda 14 | 15 | import enum AWSLambdaRuntime.Lambda 16 | public typealias Lambda = AWSLambdaRuntime.Lambda 17 | -------------------------------------------------------------------------------- /Sources/MacroLambdaCore/LambdaNIOConversions.swift: -------------------------------------------------------------------------------- 1 | // 2 | // LambdaNIOConversions.swift 3 | // MacroLambda 4 | // 5 | // Created by Helge Heß 6 | // Copyright © 2020-2021 ZeeZide GmbH. All rights reserved. 7 | // 8 | 9 | #if canImport(AWSLambdaEvents) 10 | import struct NIOHTTP1.HTTPRequestHead 11 | import struct NIOHTTP1.HTTPVersion 12 | import enum NIOHTTP1.HTTPMethod 13 | import struct NIOHTTP1.HTTPHeaders 14 | import enum NIOHTTP1.HTTPResponseStatus 15 | 16 | import struct AWSLambdaEvents.HTTPMethod 17 | import struct AWSLambdaEvents.HTTPHeaders 18 | import struct AWSLambdaEvents.HTTPMultiValueHeaders 19 | import struct AWSLambdaEvents.HTTPResponseStatus 20 | 21 | internal extension AWSLambdaEvents.HTTPMethod { 22 | 23 | @inlinable 24 | var asNIO: NIOHTTP1.HTTPMethod { 25 | switch self { 26 | case .GET : return .GET 27 | case .POST : return .POST 28 | case .PUT : return .PUT 29 | case .PATCH : return .PATCH 30 | case .DELETE : return .DELETE 31 | case .OPTIONS : return .OPTIONS 32 | case .HEAD : return .HEAD 33 | default : return .RAW(value: rawValue) 34 | } 35 | } 36 | } 37 | 38 | internal extension AWSLambdaEvents.HTTPHeaders { 39 | 40 | @inlinable 41 | var asNIO: NIOHTTP1.HTTPHeaders { 42 | get { 43 | var headers = NIOHTTP1.HTTPHeaders() 44 | for ( name, value ) in self { 45 | headers.add(name: name, value: value) 46 | } 47 | return headers 48 | } 49 | } 50 | } 51 | 52 | internal extension AWSLambdaEvents.HTTPMultiValueHeaders { 53 | 54 | @inlinable 55 | var asNIO: NIOHTTP1.HTTPHeaders { 56 | set { 57 | for ( name, value ) in newValue { 58 | self[name, default: []].append(value) 59 | } 60 | } 61 | get { 62 | var headers = NIOHTTP1.HTTPHeaders() 63 | for ( name, values ) in self { 64 | for value in values { 65 | headers.add(name: name, value: value) 66 | } 67 | } 68 | return headers 69 | } 70 | } 71 | } 72 | 73 | internal extension NIOHTTP1.HTTPHeaders { 74 | 75 | @inlinable 76 | func asLambda() -> ( headers : AWSLambdaEvents.HTTPHeaders?, 77 | cookies : [ String ]? ) 78 | { 79 | guard !isEmpty else { return ( nil, nil ) } 80 | 81 | // Those do no proper CI, lets hope they are consistent 82 | var headers = AWSLambdaEvents.HTTPHeaders() 83 | var cookies = [ String ]() 84 | headers.reserveCapacity(headers.count) 85 | 86 | // Schnüff, we don't get NIO's `compareCaseInsensitiveASCIIBytes` 87 | for ( name, value ) in self { 88 | // This is all not good. But neither is the JSON gateway :-) 89 | if name.caseInsensitiveCompare("Set-Cookie") == .orderedSame || 90 | name.caseInsensitiveCompare("Cookie") == .orderedSame 91 | { 92 | cookies.append(value) 93 | } 94 | else { 95 | if let existing = headers.removeValue(forKey: name) { 96 | // Don't know, SwiftLambda 0.4 dropped the multiheaders? What should 97 | // we do for dupes? 98 | if value .isEmpty {} 99 | else if existing.isEmpty { headers[name] = value } 100 | else { headers[name] = existing + ", " + value } 101 | } 102 | else { 103 | headers[name] = value 104 | } 105 | } 106 | } 107 | 108 | return ( headers : headers.isEmpty ? nil : headers, 109 | cookies : cookies.isEmpty ? nil : cookies ) 110 | } 111 | } 112 | 113 | internal extension NIOHTTP1.HTTPResponseStatus { 114 | 115 | @inlinable 116 | var asLambda : AWSLambdaEvents.HTTPResponseStatus { // why, o why 117 | return .init(code: UInt(code), reasonPhrase: reasonPhrase) 118 | } 119 | } 120 | 121 | internal extension AWSLambdaEvents.HTTPResponseStatus { 122 | 123 | @inlinable 124 | var asNIO : NIOHTTP1.HTTPResponseStatus { // why, o why 125 | return .init(statusCode: Int(code), 126 | reasonPhrase: reasonPhrase ?? "HTTP Status \(code)") 127 | } 128 | } 129 | #endif // canImport(AWSLambdaEvents) 130 | -------------------------------------------------------------------------------- /Sources/MacroLambdaCore/LambdaRequest.swift: -------------------------------------------------------------------------------- 1 | // 2 | // LambdaRequest.swift 3 | // MacroLambda 4 | // 5 | // Created by Helge Heß 6 | // Copyright © 2020 ZeeZide GmbH. All rights reserved. 7 | // 8 | 9 | #if canImport(AWSLambdaEvents) 10 | 11 | import struct Logging.Logger 12 | import struct NIOHTTP1.HTTPRequestHead 13 | import enum AWSLambdaEvents.APIGateway 14 | import struct MacroCore.Buffer 15 | import protocol MacroCore.EnvironmentKey 16 | import class http.IncomingMessage 17 | 18 | public extension IncomingMessage { 19 | 20 | convenience init(lambdaRequest : APIGateway.V2.Request, 21 | log : Logger = .init(label: "μ.http")) 22 | { 23 | // version doesn't matter, we don't really do HTTP 24 | var head = HTTPRequestHead( 25 | version : .init(major: 1, minor: 1), 26 | method : lambdaRequest.context.http.method.asNIO, 27 | uri : lambdaRequest.context.http.path 28 | ) 29 | head.headers = lambdaRequest.headers.asNIO 30 | 31 | if let cookies = lambdaRequest.cookies, !cookies.isEmpty { 32 | // So our "connect" module expects them in the headers, so we'd need 33 | // to serialize them again ... 34 | // The `IncomingMessage` also has a `cookies` getter, but I think that 35 | // isn't cached. 36 | for cookie in cookies { // that is weird too, is it right? 37 | head.headers.add(name: "Cookie", value: cookie) 38 | } 39 | } 40 | 41 | // TBD: there is also "pathParameters", what is that, URL fragments (#)? 42 | if let pathParams = lambdaRequest.pathParameters, !pathParams.isEmpty { 43 | log.warning("ignoring lambda path parameters: \(pathParams)") 44 | } 45 | 46 | if let qsParameters = lambdaRequest.queryStringParameters, 47 | !qsParameters.isEmpty 48 | { 49 | // TBD: is that included in the path? 50 | var isFirst = false 51 | if !head.uri.contains("?") { head.uri.append("?"); isFirst = true } 52 | for ( key, value ) in qsParameters { 53 | if isFirst { isFirst = false } 54 | else { head.uri += "&" } 55 | 56 | head.uri += 57 | key.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed) 58 | ?? key 59 | head.uri += "=" 60 | head.uri += 61 | value.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed) 62 | ?? value 63 | } 64 | } 65 | 66 | self.init(head, socket: nil, log: log) 67 | 68 | // and keep the whole thing 69 | lambdaGatewayRequest = lambdaRequest 70 | } 71 | 72 | internal func sendLambdaBody(_ lambdaRequest: APIGateway.V2.Request) { 73 | defer { push(nil) } 74 | 75 | guard let body = lambdaRequest.body else { return } 76 | do { 77 | if lambdaRequest.isBase64Encoded { 78 | push(try Buffer.from(body, "base64")) 79 | } 80 | else { 81 | push(try Buffer.from(body)) 82 | } 83 | } 84 | catch { 85 | emit(error: error) 86 | } 87 | } 88 | } 89 | 90 | 91 | enum LambdaRequestKey: EnvironmentKey { 92 | static let defaultValue : APIGateway.V2.Request? = nil 93 | static let loggingKey = "lambda-request" 94 | } 95 | 96 | public extension IncomingMessage { 97 | 98 | var lambdaGatewayRequest: APIGateway.V2.Request? { 99 | set { environment[LambdaRequestKey.self] = newValue } 100 | get { return environment[LambdaRequestKey.self] } 101 | } 102 | } 103 | #endif // canImport(AWSLambdaEvents) 104 | -------------------------------------------------------------------------------- /Sources/MacroLambdaCore/LambdaResponse.swift: -------------------------------------------------------------------------------- 1 | // 2 | // LambdaResponse.swift 3 | // MacroLambda 4 | // 5 | // Created by Helge Heß 6 | // Copyright © 2020-2021 ZeeZide GmbH. All rights reserved. 7 | // 8 | 9 | #if canImport(AWSLambdaEvents) 10 | import enum AWSLambdaEvents.APIGateway 11 | import class http.ServerResponse 12 | 13 | extension ServerResponse { 14 | 15 | var asLambdaGatewayResponse: APIGateway.V2.Response { 16 | assert(writableEnded, "sending ServerResponse which didn't end?!") 17 | 18 | let ( headers, cookies ) = self.headers.asLambda() 19 | 20 | let body : String? = { 21 | guard let writtenContent = writableBuffer, !writtenContent.isEmpty else { 22 | return nil 23 | } 24 | 25 | // TBD: We could make this more tolerant and use a String if the content 26 | // is textual and can be converted to UTF-8? Would make it faster as 27 | // well. 28 | do { 29 | return try writtenContent.toString("base64") 30 | } 31 | catch { // FIXME: make throwing 32 | log.error("could not convert body to base64: \(error)") 33 | return nil 34 | } 35 | }() 36 | 37 | return .init(statusCode : status.asLambda, 38 | headers : headers, 39 | body : body, 40 | isBase64Encoded : body != nil ? true : false, 41 | cookies : cookies) 42 | } 43 | } 44 | 45 | #endif // canImport(AWSLambdaEvents) 46 | -------------------------------------------------------------------------------- /Sources/MacroLambdaCore/LambdaServer.swift: -------------------------------------------------------------------------------- 1 | // 2 | // LambdaServer.swift 3 | // MacroLambda 4 | // 5 | // Created by Helge Heß 6 | // Copyright © 2020 ZeeZide GmbH. All rights reserved. 7 | // 8 | 9 | #if canImport(AWSLambdaEvents) && canImport(AWSLambdaRuntime) 10 | 11 | import func Foundation.setenv 12 | import func Foundation.exit 13 | import struct Logging.Logger 14 | import class NIO.EventLoopFuture 15 | import class MacroCore.ErrorEmitter 16 | import enum MacroCore.EventListenerSet 17 | import struct MacroCore.Buffer 18 | import class http.IncomingMessage 19 | import class http.ServerResponse 20 | import protocol AWSLambdaRuntime.EventLoopLambdaHandler 21 | import enum AWSLambdaRuntime.Lambda 22 | import enum AWSLambdaEvents.APIGateway 23 | import express 24 | 25 | extension lambda { 26 | 27 | /** 28 | * An `http.Server` lookalike, but for AWS Lambda functions addressed using 29 | * the AWS API Gateway V2. 30 | * 31 | * Create those server objects using `lambda.createServer`, example: 32 | * 33 | * let server = lambda.createServer { req, res in 34 | * req.log.info("request arrived in Macro land: \(req.url)") 35 | * res.writeHead(200, [ "Content-Type": "text/html" ]) 36 | * res.end("

Hello World

") 37 | * } 38 | * server.run() 39 | * 40 | * Note that the `run` function never returns. 41 | */ 42 | open class Server: ErrorEmitter { 43 | 44 | public let log : Logger 45 | private var didRetain = false 46 | 47 | @usableFromInline 48 | init(log: Logger = .init(label: "μ.http")) { 49 | self.log = log 50 | super.init() 51 | } 52 | deinit { 53 | if didRetain { 54 | core.release() 55 | didRetain = false 56 | } 57 | } 58 | 59 | override open func emit(error: Error) { 60 | log.error("server error: \(error)") 61 | super.emit(error: error) 62 | } 63 | 64 | 65 | // MARK: - Events 66 | 67 | // Note: This does NOT support once! 68 | private var _requestListeners = 69 | EventListenerSet<( IncomingMessage, ServerResponse )>() 70 | private var _expectListeners = 71 | EventListenerSet<( IncomingMessage, ServerResponse )>() 72 | private var _listeningListeners = 73 | EventListenerSet() 74 | 75 | private var hasRequestListeners : Bool { 76 | return !_requestListeners.isEmpty 77 | } 78 | 79 | @discardableResult 80 | public func onRequest(execute: 81 | @escaping ( IncomingMessage, ServerResponse ) -> Void) -> Self 82 | { 83 | _requestListeners.add(execute) 84 | return self 85 | } 86 | @discardableResult 87 | public func onCheckExpectation(execute: 88 | @escaping ( IncomingMessage, ServerResponse ) -> Void) -> Self 89 | { 90 | _expectListeners.add(execute) 91 | return self 92 | } 93 | 94 | @discardableResult 95 | public func onListening(execute: @escaping ( Server ) -> Void) -> Self { 96 | _listeningListeners.add(execute) 97 | if listening { execute(self) } 98 | return self 99 | } 100 | 101 | private func emitExpect(request: IncomingMessage, response: ServerResponse) 102 | -> Bool 103 | { 104 | var listeners = _expectListeners // Note: No `once` support! 105 | if listeners.isEmpty { 106 | response.status = .expectationFailed 107 | response.end() 108 | return false 109 | } 110 | else { 111 | listeners.emit(( request, response )) 112 | return true 113 | } 114 | } 115 | 116 | 117 | // MARK: - Handle Requests 118 | 119 | private func handle(request: IncomingMessage, response: ServerResponse) 120 | -> Bool 121 | { 122 | // aka onRequest 123 | var listeners = _requestListeners // Note: No `once` support! 124 | guard !listeners.isEmpty else { return false } 125 | 126 | listeners.emit(( request, response )) 127 | return true 128 | } 129 | 130 | private func feed(request: IncomingMessage, data: Buffer) { 131 | request.push(data) 132 | } 133 | 134 | private func end(request: IncomingMessage) { 135 | assert(!request.complete) 136 | #if false // we don't have that 137 | request.complete = true 138 | #endif 139 | } 140 | 141 | private func cancel(request: IncomingMessage, response: ServerResponse) { 142 | // TODO / TBD 143 | } 144 | 145 | private func emitError(_ error: Swift.Error, 146 | transaction: ( IncomingMessage, ServerResponse )?) 147 | { 148 | if let ( request, _ ) = transaction { 149 | // TBD: we also need to tell the response if the channel was closed? 150 | request.emit(error: error) 151 | } 152 | else { 153 | emit(error: error) 154 | } 155 | } 156 | 157 | private var didRun = false 158 | 159 | open var listening : Bool { 160 | return didRun 161 | } 162 | 163 | open func run(onRun : ( ( Server ) -> Void)? = nil) -> Never { 164 | assert(!didRun) 165 | guard !didRun else { 166 | fatalError("run called twice, which is impossible :-)") 167 | } 168 | didRun = true 169 | 170 | // Let "onListener" listeners know that we started running. 171 | if let onRun = onRun { onRun(self) } 172 | var listeners = _listeningListeners 173 | _listeningListeners.removeAll() 174 | listeners.emit(self) 175 | 176 | // Note: I think we can't set the core.eventLoopGroup here, because the 177 | // eventLoop is only available in the Lambda context? Not sure who 178 | // would even touch the MacroCore loop (vs using current). 179 | 180 | struct APIGatewayProxyLambda: EventLoopLambdaHandler { 181 | typealias In = APIGateway.V2.Request 182 | typealias Out = APIGateway.V2.Response 183 | 184 | let server : Server 185 | 186 | func handle(context: Lambda.Context, event: In) -> EventLoopFuture 187 | { 188 | let promise = context.eventLoop.makePromise(of: Out.self) 189 | server.handle(context: context, request: event) { result in 190 | promise.completeWith(result) 191 | } 192 | return promise.futureResult 193 | } 194 | } 195 | let proxy = APIGatewayProxyLambda(server: self) 196 | Lambda.run(proxy) 197 | Foundation.exit(0) // Because `run` is not marked as Never (Issue #151) 198 | } 199 | 200 | private func handle(context : Lambda.Context, 201 | request : APIGateway.V2.Request, 202 | callback : @escaping 203 | ( Result ) -> Void) 204 | { 205 | guard !self._requestListeners.isEmpty else { 206 | assertionFailure("no request listeners?!") 207 | return callback(.failure(ServerError.noRequestListeners)) 208 | } 209 | 210 | let req = IncomingMessage(lambdaRequest: request, log: context.logger) 211 | let res = ServerResponse(unsafeChannel: nil, log: context.logger) 212 | res.cork() 213 | res.request = req 214 | 215 | // The transaction ends when the response is done, not when the 216 | // request was read completely! 217 | var didFinish = false 218 | 219 | res.onceFinish { 220 | // convert res to gateway Response and call callback 221 | guard !didFinish else { 222 | return context.logger.error("TX already finished!") 223 | } 224 | didFinish = true 225 | 226 | callback(.success(res.asLambdaGatewayResponse)) 227 | } 228 | 229 | res.onError { error in 230 | guard !didFinish else { 231 | return context.logger.error("Follow up error: \(error)") 232 | } 233 | didFinish = true 234 | callback(.failure(error)) 235 | } 236 | 237 | // TODO: Process Expect. It's not really "ahead of sending the body", 238 | // but we still need to validate the preconditions. http.Server 239 | // has code for this. Do the same. 240 | 241 | do { // onRequest 242 | var listeners = self._requestListeners // Note: No `once` support! 243 | guard !listeners.isEmpty else { 244 | didFinish = true 245 | return callback(.failure(ServerError.noRequestListeners)) 246 | } 247 | 248 | listeners.emit(( req, res )) 249 | } 250 | 251 | // For a streaming push, we do the lambda-send here, after announcing the 252 | // head. 253 | if !res.writableEnded { // response is already closed 254 | req.sendLambdaBody(request) 255 | } 256 | else { 257 | assert(didFinish) 258 | } 259 | } 260 | } 261 | 262 | enum ServerError: Swift.Error { 263 | case noRequestListeners 264 | } 265 | } 266 | 267 | #endif // canImport(AWSLambdaEvents) && canImport(AWSLambdaRuntime) 268 | -------------------------------------------------------------------------------- /Sources/MacroLambdaCore/Process.swift: -------------------------------------------------------------------------------- 1 | // 2 | // lambda.swift 3 | // MacroLambda 4 | // 5 | // Created by Helge Heß 6 | // Copyright © 2020 ZeeZide GmbH. All rights reserved. 7 | // 8 | 9 | import let xsys.getenv 10 | import enum MacroCore.process 11 | 12 | public extension process { 13 | 14 | #if os(macOS) || os(iOS) || os(watchOS) || os(tvOS) || os(Windows) 15 | /** 16 | * Returns true if the server is running in an actual AWS Lambda 17 | * environment. (I.e. never true on macOS/iOS/etc) 18 | */ 19 | static let isRunningInLambda = false 20 | #else 21 | /** 22 | * Returns true if the server is running in an actual AWS Lambda 23 | * environment. (I.e. never true on macOS/iOS/etc) 24 | */ 25 | static let isRunningInLambda : Bool = { 26 | guard let s = xsys.getenv("AWS_LAMBDA_FUNCTION_NAME") else { 27 | return false 28 | } 29 | return s[0] != 0 30 | }() 31 | #endif 32 | } 33 | -------------------------------------------------------------------------------- /Sources/MacroLambdaCore/README.md: -------------------------------------------------------------------------------- 1 | # Macro http.lambda 2 | 3 | The files within simulate `http.createServer` but for AWS Lambda functions 4 | addressed using the 5 | AWS [API Gateway](https://aws.amazon.com/api-gateway/) V2. 6 | 7 | Tutorial: 8 | [Create your first HTTP endpoint with Swift on AWS Lambda](https://fabianfett.de/swift-on-aws-lambda-creating-your-first-http-endpoint)) 9 | 10 | Requests are regular `IncomingMessage` objects, responses are regular 11 | `ServerResponse` objects. 12 | 13 | Requests carry the additional `lambdaGatewayRequest` property to provide 14 | access to the full Lambda JSON structure. 15 | 16 | ## Example 17 | 18 | ```swift 19 | let server = lambda.createServer { req, res in 20 | req.log.info("request arrived in Macro land: \(req.url)") 21 | res.send("Hello You!") 22 | } 23 | server.run() 24 | ``` 25 | 26 | Note that the `run` function never returns. 27 | -------------------------------------------------------------------------------- /Sources/MacroLambdaCore/lambda.swift: -------------------------------------------------------------------------------- 1 | // 2 | // lambda.swift 3 | // MacroLambda 4 | // 5 | // Created by Helge Heß 6 | // Copyright © 2020 ZeeZide GmbH. All rights reserved. 7 | // 8 | 9 | #if canImport(AWSLambdaRuntime) 10 | 11 | public enum lambda {} 12 | 13 | #if canImport(AWSLambdaEvents) 14 | 15 | import func Foundation.setenv 16 | import class http.IncomingMessage 17 | import class http.ServerResponse 18 | 19 | public extension lambda { 20 | 21 | /** 22 | * An `http.createServer` lookalike, but for AWS Lambda functions addressed 23 | * using the AWS API Gateway V2. 24 | * 25 | * Requests are regular `IncomingMessage` objects, responses are regular 26 | * `ServerResponse` objects. 27 | * 28 | * Requests carry the additional `lambdaGatewayRequest` property to provide 29 | * access to the full Lambda JSON structure. 30 | * 31 | * Example: 32 | * 33 | * let server = createServer { req, res in 34 | * req.log.info("request arrived in Macro land: \(req.url)") 35 | * res.writeHead(200, [ "Content-Type": "text/html" ]) 36 | * res.end("

Hello World

") 37 | * } 38 | * server.run() 39 | * 40 | * Note that the `run` function never returns. 41 | */ 42 | @inlinable 43 | @discardableResult 44 | static func createServer(handler: ((IncomingMessage, ServerResponse) -> Void)? 45 | = nil) 46 | -> Server 47 | { 48 | // This is used the first time MacroCore.shared eventloop is accessed, 49 | // it shouldn't ever, but if it is, we just fork one thread :-) 50 | let magicKey = "macro.core.numthreads" 51 | setenv(magicKey, "1", 0 /* do not overwrite */) 52 | 53 | let server = Server() 54 | if let handler = handler { _ = server.onRequest(execute: handler) } 55 | return server 56 | } 57 | } 58 | 59 | #endif // canImport(AWSLambdaEvents) 60 | #endif // canImport(AWSLambdaRuntime) 61 | --------------------------------------------------------------------------------