├── README.md
├── examples
    ├── 01-events.js
    ├── 02.1-readableStream.js
    ├── 02.2-read-iterators.js
    ├── 02.3-redableStream.js
    ├── 03.writableStream.js
    ├── 04.1-piping.js
    ├── 04.2-piping
    │   ├── index.js
    │   ├── package-lock.json
    │   ├── package.json
    │   └── test.csv
    ├── 05-childProcess.js
    ├── 0x-readStream.js
    ├── logger.log
    └── test.csv
├── notes.txt
└── remote-access-app
    ├── .gitignore
    ├── .gitmodules
    ├── README.md
    ├── client
        ├── Procfile
        ├── deps
        │   └── socket.io.slim.js
        ├── index.html
        ├── package-lock.json
        ├── package.json
        ├── resources
        │   ├── bootstrap.min.css
        │   └── desktop.png
        ├── sharer
        │   ├── app.js
        │   ├── index.html
        │   └── screen.js
        └── watcher
        │   ├── app.js
        │   └── index.html
    └── server
        ├── index.html
        ├── package-lock.json
        ├── package.json
        └── server.js


/README.md:
--------------------------------------------------------------------------------
 1 | # talk-deep-dive-into-nodejs-streams
 2 | 
 3 | - All code sources are in [./examples](./examples)
 4 | - There's a remote app using Node.js Streams + WebRTC (plus) in [./remote-access-app](./remote-access-app)
 5 | 
 6 | ## Event
 7 | 
 8 | - Slides in [example](erickwendel.com)
 9 | - Event link: [Geegle.us](https://geekle.us)
10 | 


--------------------------------------------------------------------------------
/examples/01-events.js:
--------------------------------------------------------------------------------
 1 | const log = (...args) => console.log(...args)
 2 | const EventEmitter = require('events')
 3 | class Downloader extends EventEmitter { }
 4 | 
 5 | const downloader = new Downloader()
 6 | downloader.on('data', msg => log('msg arrived!', msg))
 7 | downloader.on('error', msg => log('error!', msg))
 8 | 
 9 | downloader.on('my-custom-event', msg => log('custom!', msg))
10 | 
11 | setInterval(() => {
12 |     downloader.emit('my-custom-event', { message: 'Hello!' })
13 |     downloader.emit('data', 'Hey there!')    
14 | }, 1000);
15 | 
16 | 
17 | 
18 | 


--------------------------------------------------------------------------------
/examples/02.1-readableStream.js:
--------------------------------------------------------------------------------
 1 | let counter = 0
 2 | const log = (...args) => console.log(`[${++counter}]`, ...args)
 3 | const { Readable } = require('stream')
 4 | const readable = new Readable()
 5 | 
 6 | readable.on("resume", _ => log(`resuming..`))
 7 | readable.on("pause", _ => log(`pausing..`))
 8 | readable.on("end", _ => log(`No more data!`))
 9 | readable.on("close", () => log(`closing..`))
10 | 
11 | readable.on("error", msg => log(`Caught error!: ${msg}`))
12 | readable.on("data", msg => log(`Chunk read: ${msg}`))
13 | 
14 | readable.push("ping")
15 | readable.pause()
16 | readable.push("pong")
17 | readable.resume()
18 | readable.push(null)
19 | 
20 | readable.emit("error", new Error('**raising error!!'))
21 | 
22 | 


--------------------------------------------------------------------------------
/examples/02.2-read-iterators.js:
--------------------------------------------------------------------------------
 1 | const { createReadStream } = require('fs')
 2 | const rs = createReadStream("/dev/urandom");
 3 | 
 4 | ;
 5 | (async () => {
 6 |     for await (const chunk of rs) {
 7 |         console.log('words:\n', chunk.toString())
 8 |     }
 9 | })()
10 | 
11 | 


--------------------------------------------------------------------------------
/examples/02.3-redableStream.js:
--------------------------------------------------------------------------------
1 | const log = (...args) => console.log(...args)
2 | const { createReadStream } = require("fs");
3 | // forcing multiple events splitting in bytes
4 | const rs = createReadStream(__filename, { highWaterMark: 100});
5 | let eventCounter = 0
6 | rs.on("data", msg => log(`${[++eventCounter]}`, msg.toString()))
7 | 


--------------------------------------------------------------------------------
/examples/03.writableStream.js:
--------------------------------------------------------------------------------
 1 | let counter = 0
 2 | const log = (...args) => console.log(`[${++counter}]`, ...args)
 3 | const { createWriteStream, promises: { readFile } } = require('fs')
 4 | ;(async () => {
 5 |     const filename = `test.csv`
 6 |     const ws = createWriteStream(filename)
 7 |     ws.on("open", _ => log('opened!'))
 8 |     ws.on("close", _ => log('close!'))
 9 |     ws.on("drain", _ => log('drain!'))
10 |     ws.on("finish", _ => log('finished!'))
11 |     ws.on("error", (error) => log('error!', error.toString()))
12 | 
13 |     ws.write('name,age\n')
14 |     ws.write(`Erick,25\n`)
15 |     ws.write(`Mary,20\n`)
16 |     ws.write(`Jose,30\n`)
17 |     ws.emit('error', new Error('raising error!'))
18 |     ws.end("Footer: I'm done bro")
19 |     
20 |     log(`\n${(await readFile(filename)).toString()}`)
21 | })()
22 | 
23 | 
24 | 
25 | 
26 | 


--------------------------------------------------------------------------------
/examples/04.1-piping.js:
--------------------------------------------------------------------------------
 1 | // process.stdin.pipe(process.stdout)
 2 | 
 3 | const { Transform } = require('stream')
 4 | const {
 5 |     createWriteStream,
 6 |     readFileSync
 7 | } = require('fs')
 8 | 
 9 | const filename = `${__dirname}/logger.log`
10 |  
11 | const mapCommands = new Transform({
12 |     transform(chunk, enc, cb) {
13 |         const cmd = chunk.toString().trim()
14 |         if (!cmd) return cb()
15 | 
16 |         const at = new Date().toISOString()
17 |         const item = `cmd: ${cmd},at: ${at},\n`
18 | 
19 |         cb(null, item)
20 |     }
21 | })
22 | 
23 | console.log('Write commands and then <Ctrl> + C to show output')
24 | process.stdin
25 |     .pipe(mapCommands)
26 |     .pipe(createWriteStream(filename))
27 | 
28 | process.on("SIGINT", msg => {
29 |     console.log()
30 |     console.log(readFileSync(filename).toString())
31 |     process.exit(0)
32 | })


--------------------------------------------------------------------------------
/examples/04.2-piping/index.js:
--------------------------------------------------------------------------------
 1 | let counter = 0
 2 | const log = (...args) => console.log(`[${++counter}]`, ...args)
 3 | 
 4 | const { createReadStream } = require('fs')
 5 | const { Transform, Writable, pipeline } = require('stream')
 6 | const csvtojson = require('csvtojson')
 7 | 
 8 | const { promisify } = require('util')
 9 | const pipelineAsync = promisify(pipeline)
10 | const datasource = `${__dirname}/test.csv`
11 | const currentYear = new Date().getFullYear()
12 | 
13 | const mapAge = new Transform({
14 |     objectMode: true,
15 |     transform: (chunk, enc, cb) => {
16 |         const item = JSON.parse(chunk)
17 |         const age = currentYear - item.birthYear
18 |         if (age < 0) {
19 |             const message = 'invalid age'
20 |             const error = JSON.stringify({ message, item })
21 |             return cb(error)
22 |         }
23 | 
24 |         const data = JSON.stringify({
25 |             name: item.name,
26 |             age
27 |         })
28 | 
29 |         return cb(null, data)
30 |     }
31 | })
32 | 
33 | const showOutput = new Writable({
34 |     write: (chunk, encoding, cb) => {
35 |         const data = JSON.parse(chunk)
36 | 
37 |         log('name', chunk.toString())
38 |         cb()
39 |     }
40 | })
41 | 
42 | 
43 | createReadStream(datasource)
44 |     .pipe(csvtojson())
45 |     .on("error", msg => log('csvtojson error!', msg))
46 | 
47 |     .pipe(mapAge)
48 |     .on("error", msg => log('mapAge error!', msg))
49 | 
50 |     .pipe(showOutput)
51 |     .on("error", msg => log('showOutput error!', msg))
52 | 
53 | 
54 | { 
55 |     (async () => {
56 |         try {
57 |             await pipelineAsync(
58 |                 createReadStream(datasource),
59 |                 csvtojson(),
60 |                 mapAge,
61 |                 showOutput,
62 |             )
63 |             console.log('finished!')
64 |         } catch (error) {
65 |             log('error on pipeline!', error)
66 |         }
67 | 
68 |     })()
69 | }
70 | 


--------------------------------------------------------------------------------
/examples/04.2-piping/package-lock.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "04.2-piping",
 3 |   "version": "1.0.0",
 4 |   "lockfileVersion": 1,
 5 |   "requires": true,
 6 |   "dependencies": {
 7 |     "bluebird": {
 8 |       "version": "3.7.2",
 9 |       "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.7.2.tgz",
10 |       "integrity": "sha512-XpNj6GDQzdfW+r2Wnn7xiSAd7TM3jzkxGXBGTtWKuSXv1xUV+azxAm8jdWZN06QTQk+2N2XB9jRDkvbmQmcRtg=="
11 |     },
12 |     "csvtojson": {
13 |       "version": "2.0.10",
14 |       "resolved": "https://registry.npmjs.org/csvtojson/-/csvtojson-2.0.10.tgz",
15 |       "integrity": "sha512-lUWFxGKyhraKCW8Qghz6Z0f2l/PqB1W3AO0HKJzGIQ5JRSlR651ekJDiGJbBT4sRNNv5ddnSGVEnsxP9XRCVpQ==",
16 |       "requires": {
17 |         "bluebird": "^3.5.1",
18 |         "lodash": "^4.17.3",
19 |         "strip-bom": "^2.0.0"
20 |       }
21 |     },
22 |     "is-utf8": {
23 |       "version": "0.2.1",
24 |       "resolved": "https://registry.npmjs.org/is-utf8/-/is-utf8-0.2.1.tgz",
25 |       "integrity": "sha1-Sw2hRCEE0bM2NA6AeX6GXPOffXI="
26 |     },
27 |     "lodash": {
28 |       "version": "4.17.15",
29 |       "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.15.tgz",
30 |       "integrity": "sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A=="
31 |     },
32 |     "strip-bom": {
33 |       "version": "2.0.0",
34 |       "resolved": "https://registry.npmjs.org/strip-bom/-/strip-bom-2.0.0.tgz",
35 |       "integrity": "sha1-YhmoVhZSBJHzV4i9vxRHqZx+aw4=",
36 |       "requires": {
37 |         "is-utf8": "^0.2.0"
38 |       }
39 |     }
40 |   }
41 | }
42 | 


--------------------------------------------------------------------------------
/examples/04.2-piping/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "04.2-piping",
 3 |   "version": "1.0.0",
 4 |   "description": "",
 5 |   "main": "index.js",
 6 |   "scripts": {
 7 |     "test": "echo \"Error: no test specified\" && exit 1"
 8 |   },
 9 |   "keywords": [],
10 |   "author": "",
11 |   "license": "ISC",
12 |   "dependencies": {
13 |     "csvtojson": "^2.0.10"
14 |   }
15 | }
16 | 


--------------------------------------------------------------------------------
/examples/04.2-piping/test.csv:
--------------------------------------------------------------------------------
1 | name,birthYear
2 | Erick,1995
3 | Mary,1970
4 | Ana,2021
5 | Jose,1965


--------------------------------------------------------------------------------
/examples/05-childProcess.js:
--------------------------------------------------------------------------------
 1 | 
 2 | "use strict";
 3 | const { promisify } = require('util')
 4 | const { pipeline: pipeSync } = require('stream')
 5 | const pipeline = promisify(pipeSync)
 6 | 
 7 | const { spawn } = require("child_process");
 8 | const subprocess = spawn(
 9 |     "sh",
10 |     [
11 |         "-c",
12 |         `
13 |         node -e "setInterval(() => {
14 |             console.log(process.pid)
15 |         }, 500);"
16 |         `
17 |     ],
18 |     {
19 |         stdio: "pipe",
20 |     }
21 | );
22 | 
23 | 
24 | pipeline(
25 |     subprocess.stdout,
26 |     async function* (source) {
27 |         for await (const chunk of source) {
28 |             console.log('chunk', chunk.toString())
29 |             yield chunk
30 |         }
31 |     }
32 | ).catch(err => console.log('error', err))
33 | 
34 | setTimeout(() => {
35 |     subprocess.kill(); // Does not terminate the Node.js process in the shell.
36 | }, 2000);


--------------------------------------------------------------------------------
/examples/0x-readStream.js:
--------------------------------------------------------------------------------
 1 | const { Duplex } = require('stream')
 2 | let counter = 0
 3 | const dp = new Duplex({
 4 |     write(c, e, cb) {
 5 |         console.log('c', c.toString())
 6 |         cb(null, c)
 7 |     },
 8 |     // called on creation!
 9 |     read(size) {
10 |         console.log('called!', size)
11 |         
12 |         // this.push(`${++counter}`)
13 |         // if (counter > 10)
14 |         //     this.push(null)
15 |     }
16 | })
17 | 
18 | dp.on("data", msg => console.log('msg', msg.toString()))
19 | // dp.push("1")
20 | // dp.push("2")
21 | // dp.push(null)
22 | 
23 | dp.write("avc")
24 | dp.write("acc")
25 | 
26 | dpc.pipe((dest) => dest1 => {
27 |     console.log('called!!')
28 | })


--------------------------------------------------------------------------------
/examples/logger.log:
--------------------------------------------------------------------------------
1 | cmd: git clone,at: 2020-05-23T23:51:55.422Z,
2 | cmd: git status,at: 2020-05-23T23:51:57.829Z,
3 | cmd: echo 'hey dude',at: 2020-05-23T23:52:01.339Z,
4 | cmd: test,at: 2020-05-23T23:52:02.577Z,
5 | 


--------------------------------------------------------------------------------
/examples/test.csv:
--------------------------------------------------------------------------------
1 | name,age
2 | Erick,25
3 | Mary,20
4 | Jose,30
5 | Footer: I'm done bro


--------------------------------------------------------------------------------
/notes.txt:
--------------------------------------------------------------------------------
  1 | What
  2 | Why
  3 | Where
  4 | How 
  5 | 
  6 | 
  7 | - Deep Dive on Node.js Streams 
  8 | 
  9 | - Problem 
 10 |     single thread
 11 |     - vs traditional approach 
 12 |         - axios.get ... wait download 05 gb 
 13 |         - process on file 
 14 |         - remove file 
 15 |             -> time to feedback 
 16 |             -> storage 
 17 |             -> memory usage 
 18 | 
 19 |     high volume of data 
 20 |     events
 21 |     error handling 
 22 | 
 23 | What
 24 | 
 25 |     - Node.js has Streams since v0
 26 |     - Created to upload videos feature
 27 |     Concepts:
 28 |         - Event emitter class 
 29 |             -> on.data 
 30 |             -> on.error
 31 |       
 32 |     - Divided in categories:
 33 |         - Readable Streams 
 34 |             -> read from a source and emit new events
 35 |             -> read a file and emit each chunk
 36 | 
 37 |         - Writable Streams 
 38 |             -> output, such as new file or redirect to other stream 
 39 |         - Duplex Streams
 40 |             -> Readable events table
 41 |             -> Writable events table
 42 |             -> produces the both events 
 43 |             -> differences
 44 | 
 45 |         - Transform Streams 
 46 |             -> change each chunk 
 47 | When 
 48 |     on-demand processing 
 49 |     If you need to handle large files 
 50 |     If you need to handle videos on demand 
 51 |     If you need to download and process on demand
 52 |     If you need to handle large events 
 53 |         - team viewer 
 54 |     .. to process data on demand in general
 55 |         - many automated processes running in the machine building reports
 56 |         - emit events to each other 
 57 | 
 58 | How
 59 |     
 60 |     Simple example of a readable stream pipe to writable 
 61 |         - animation on events of readable 
 62 |         - animation on events of writable 
 63 |     Controlling streams flow 
 64 |         - resume, pause stop and push null 
 65 |         https://github.com/ErickWendel/nodejs-certification/blob/master/draft/index8.js (this)
 66 |         https://github.com/ErickWendel/nodejs-certification/blob/master/draft/index16.js (r)
 67 |         https://github.com/ErickWendel/nodejs-certification/blob/master/draft/index7.js (pause, resume)
 68 |     Iterators
 69 |         for await..
 70 | 
 71 |     Piping 
 72 |         = examples using normal pipe 
 73 |             - process.stdin.pipe().pipe(process.stdout)
 74 |             However, notice there are no proper error handlers attached. If a chunk of data were to fail to be properly received, the Readable source or gzip stream will not be destroyed.
 75 | 
 76 |         = customizing pipe function
 77 |         = examples using Pipeline from node 
 78 |         = only pipe a readable stream 
 79 |     show csvToJSON
 80 | 
 81 |     Using child_processes 
 82 |         avoid running in node.js main thread 
 83 |             https://github.com/ErickWendel/nodejs-certification/blob/master/draft/examples/get-data-from-child.js
 84 |     Donwloading large data (kaggle)
 85 |         -> show show to download data with percentil 
 86 | 
 87 |     Promises vs Streams 
 88 |         promises hapens once 
 89 |         bad practice
 90 |             new Promise(r -> ev.on('data') => )
 91 |     Back pressure
 92 |         - DEBUG=* -> find streams debugger
 93 |         mechanism to handle high data volume 
 94 | 
 95 |         more in 
 96 |             https://nodejs.org/es/docs/guides/backpressuring-in-streams/#lifecycle-of-pipe
 97 |             get image
 98 | 
 99 |         If the consumer is unable to consume data as fast as the producer can produce it, then the producer will be paused until the consumer catches up.
100 |     Node 14 
101 |         - calls destroy after finishing by default
102 |             -> show video using node 11 and node 14
103 | 
104 | Conclusion
105 |     Node.js streams are beautiful, try it out 
106 | 
107 | 
108 | 
109 | https://giphy.com
110 | https://www.electronjs.org/docs/api/desktop-capturer
111 | https://nodejs.org/es/docs/guides/backpressuring-in-streams/#lifecycle-of-pipe
112 | https://github.com/ErickWendel/nodejs-certification/blob/master/draft/index9.js
113 | https://devhints.io/nodejs-stream
114 | https://github.com/substack/stream-handbook
115 | 
116 | https://s3.amazonaws.com/four.livejournal/20091117/jsconf.pdf
117 | https://nodejs.org/docs/
118 | https://nodejs.org/docs/v0.1.100/api.html
119 | https://medium.com/autodesk-tlv/streams-in-depth-in-node-js-c8cc7f1eb0d6
120 | http://codewinds.com/blog/2013-08-31-nodejs-duplex-streams.html#what_is_a_duplex_stream_
121 | https://stackoverflow.com/questions/18335499/nodejs-whats-the-difference-between-a-duplex-stream-and-a-transform-stream
122 | https://nodejs.org/api/stream.html
123 | 


--------------------------------------------------------------------------------
/remote-access-app/.gitignore:
--------------------------------------------------------------------------------
1 | node_modules
2 | saved_recordings


--------------------------------------------------------------------------------
/remote-access-app/.gitmodules:
--------------------------------------------------------------------------------
1 | [submodule "server-remote-viewer"]
2 | 	path = server-remote-viewer
3 | 	url = https://git.heroku.com/server-remote-viewer.git
4 | [submodule "app-remote-viewer"]
5 | 	path = app-remote-viewer
6 | 	url = https://git.heroku.com/app-remote-viewer.git
7 | 


--------------------------------------------------------------------------------
/remote-access-app/README.md:
--------------------------------------------------------------------------------
 1 | # remote access app using WebRTC
 2 | 
 3 | ## Starting
 4 | 
 5 | - You'll find the front end in /app. There are two projects in which;
 6 | 
 7 | 1. watcher: app for receiving incoming video, audio and screen
 8 | 2. sharer: app for sharing video, audio and screen
 9 | 
10 | - On `server` folder, you'll run it to start websocket server i which is responsible to delegate incoming connections
11 | 
12 | ## Runing
13 | 
14 | - To run, you'll need to use the socket server URL. If empty, default is `localhost:4000`
15 | 


--------------------------------------------------------------------------------
/remote-access-app/client/Procfile:
--------------------------------------------------------------------------------
1 | web: npm start


--------------------------------------------------------------------------------
/remote-access-app/client/deps/socket.io.slim.js:
--------------------------------------------------------------------------------
1 | /*!
2 |  * Socket.IO v2.3.0
3 |  * (c) 2014-2019 Guillermo Rauch
4 |  * Released under the MIT License.
5 |  */
6 | !function(t,e){"object"==typeof exports&&"object"==typeof module?module.exports=e():"function"==typeof define&&define.amd?define([],e):"object"==typeof exports?exports.io=e():t.io=e()}(this,function(){return function(t){function e(n){if(r[n])return r[n].exports;var o=r[n]={exports:{},id:n,loaded:!1};return t[n].call(o.exports,o,o.exports,e),o.loaded=!0,o.exports}var r={};return e.m=t,e.c=r,e.p="",e(0)}([function(t,e,r){"use strict";function n(t,e){"object"===("undefined"==typeof t?"undefined":o(t))&&(e=t,t=void 0),e=e||{};var r,n=i(t),s=n.source,p=n.id,h=n.path,u=c[p]&&h in c[p].nsps,f=e.forceNew||e["force new connection"]||!1===e.multiplex||u;return f?r=a(s,e):(c[p]||(c[p]=a(s,e)),r=c[p]),n.query&&!e.query&&(e.query=n.query),r.socket(n.path,e)}var o="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(t){return typeof t}:function(t){return t&&"function"==typeof Symbol&&t.constructor===Symbol&&t!==Symbol.prototype?"symbol":typeof 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r=/^(?:(?![^:@]+:[^:@\/]*@)(http|https|ws|wss):\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?((?:[a-f0-9]{0,4}:){2,7}[a-f0-9]{0,4}|[^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/,n=["source","protocol","authority","userInfo","user","password","host","port","relative","path","directory","file","query","anchor"];t.exports=function(t){var e=t,o=t.indexOf("["),i=t.indexOf("]");o!=-1&&i!=-1&&(t=t.substring(0,o)+t.substring(o,i).replace(/:/g,";")+t.substring(i,t.length));for(var s=r.exec(t||""),a={},c=14;c--;)a[n[c]]=s[c]||"";return o!=-1&&i!=-1&&(a.source=e,a.host=a.host.substring(1,a.host.length-1).replace(/;/g,":"),a.authority=a.authority.replace("[","").replace("]","").replace(/;/g,":"),a.ipv6uri=!0),a}},function(t,e){"use strict";t.exports=function(){return function(){}}},function(t,e,r){function n(){}function o(t){var r=""+t.type;if(e.BINARY_EVENT!==t.type&&e.BINARY_ACK!==t.type||(r+=t.attachments+"-"),t.nsp&&"/"!==t.nsp&&(r+=t.nsp+","),null!=t.id&&(r+=t.id),null!=t.data){var n=i(t.data);if(n===!1)return m;r+=n}return r}function i(t){try{return JSON.stringify(t)}catch(t){return!1}}function s(t,e){function r(t){var r=l.deconstructPacket(t),n=o(r.packet),i=r.buffers;i.unshift(n),e(i)}l.removeBlobs(t,r)}function a(){this.reconstructor=null}function c(t){var r=0,n={type:Number(t.charAt(0))};if(null==e.types[n.type])return u("unknown packet type "+n.type);if(e.BINARY_EVENT===n.type||e.BINARY_ACK===n.type){for(var o="";"-"!==t.charAt(++r)&&(o+=t.charAt(r),r!=t.length););if(o!=Number(o)||"-"!==t.charAt(r))throw new Error("Illegal attachments");n.attachments=Number(o)}if("/"===t.charAt(r+1))for(n.nsp="";++r;){var i=t.charAt(r);if(","===i)break;if(n.nsp+=i,r===t.length)break}else n.nsp="/";var s=t.charAt(r+1);if(""!==s&&Number(s)==s){for(n.id="";++r;){var i=t.charAt(r);if(null==i||Number(i)!=i){--r;break}if(n.id+=t.charAt(r),r===t.length)break}n.id=Number(n.id)}if(t.charAt(++r)){var a=p(t.substr(r)),c=a!==!1&&(n.type===e.ERROR||d(a));if(!c)return u("invalid payload");n.data=a}return n}function p(t){try{return JSON.parse(t)}catch(t){return!1}}function h(t){this.reconPack=t,this.buffers=[]}function u(t){return{type:e.ERROR,data:"parser error: "+t}}var f=(r(3)("socket.io-parser"),r(5)),l=r(6),d=r(7),y=r(8);e.protocol=4,e.types=["CONNECT","DISCONNECT","EVENT","ACK","ERROR","BINARY_EVENT","BINARY_ACK"],e.CONNECT=0,e.DISCONNECT=1,e.EVENT=2,e.ACK=3,e.ERROR=4,e.BINARY_EVENT=5,e.BINARY_ACK=6,e.Encoder=n,e.Decoder=a;var m=e.ERROR+'"encode error"';n.prototype.encode=function(t,r){if(e.BINARY_EVENT===t.type||e.BINARY_ACK===t.type)s(t,r);else{var n=o(t);r([n])}},f(a.prototype),a.prototype.add=function(t){var r;if("string"==typeof t)r=c(t),e.BINARY_EVENT===r.type||e.BINARY_ACK===r.type?(this.reconstructor=new h(r),0===this.reconstructor.reconPack.attachments&&this.emit("decoded",r)):this.emit("decoded",r);else{if(!y(t)&&!t.base64)throw new Error("Unknown type: "+t);if(!this.reconstructor)throw new Error("got binary data when not reconstructing a packet");r=this.reconstructor.takeBinaryData(t),r&&(this.reconstructor=null,this.emit("decoded",r))}},a.prototype.destroy=function(){this.reconstructor&&this.reconstructor.finishedReconstruction()},h.prototype.takeBinaryData=function(t){if(this.buffers.push(t),this.buffers.length===this.reconPack.attachments){var e=l.reconstructPacket(this.reconPack,this.buffers);return this.finishedReconstruction(),e}return null},h.prototype.finishedReconstruction=function(){this.reconPack=null,this.buffers=[]}},function(t,e,r){function n(t){if(t)return o(t)}function o(t){for(var e in n.prototype)t[e]=n.prototype[e];return t}t.exports=n,n.prototype.on=n.prototype.addEventListener=function(t,e){return this._callbacks=this._callbacks||{},(this._callbacks["$"+t]=this._callbacks["$"+t]||[]).push(e),this},n.prototype.once=function(t,e){function r(){this.off(t,r),e.apply(this,arguments)}return r.fn=e,this.on(t,r),this},n.prototype.off=n.prototype.removeListener=n.prototype.removeAllListeners=n.prototype.removeEventListener=function(t,e){if(this._callbacks=this._callbacks||{},0==arguments.length)return this._callbacks={},this;var r=this._callbacks["$"+t];if(!r)return this;if(1==arguments.length)return delete this._callbacks["$"+t],this;for(var n,o=0;o<r.length;o++)if(n=r[o],n===e||n.fn===e){r.splice(o,1);break}return this},n.prototype.emit=function(t){this._callbacks=this._callbacks||{};var e=[].slice.call(arguments,1),r=this._callbacks["$"+t];if(r){r=r.slice(0);for(var n=0,o=r.length;n<o;++n)r[n].apply(this,e)}return this},n.prototype.listeners=function(t){return this._callbacks=this._callbacks||{},this._callbacks["$"+t]||[]},n.prototype.hasListeners=function(t){return!!this.listeners(t).length}},function(t,e,r){function n(t,e){if(!t)return t;if(s(t)){var r={_placeholder:!0,num:e.length};return e.push(t),r}if(i(t)){for(var o=new Array(t.length),a=0;a<t.length;a++)o[a]=n(t[a],e);return o}if("object"==typeof t&&!(t instanceof Date)){var o={};for(var c in t)o[c]=n(t[c],e);return o}return t}function o(t,e){if(!t)return t;if(t&&t._placeholder)return e[t.num];if(i(t))for(var r=0;r<t.length;r++)t[r]=o(t[r],e);else if("object"==typeof t)for(var n in t)t[n]=o(t[n],e);return t}var i=r(7),s=r(8),a=Object.prototype.toString,c="function"==typeof Blob||"undefined"!=typeof Blob&&"[object BlobConstructor]"===a.call(Blob),p="function"==typeof File||"undefined"!=typeof File&&"[object FileConstructor]"===a.call(File);e.deconstructPacket=function(t){var e=[],r=t.data,o=t;return o.data=n(r,e),o.attachments=e.length,{packet:o,buffers:e}},e.reconstructPacket=function(t,e){return t.data=o(t.data,e),t.attachments=void 0,t},e.removeBlobs=function(t,e){function r(t,a,h){if(!t)return t;if(c&&t instanceof Blob||p&&t instanceof File){n++;var u=new FileReader;u.onload=function(){h?h[a]=this.result:o=this.result,--n||e(o)},u.readAsArrayBuffer(t)}else if(i(t))for(var f=0;f<t.length;f++)r(t[f],f,t);else if("object"==typeof t&&!s(t))for(var l in t)r(t[l],l,t)}var n=0,o=t;r(o),n||e(o)}},function(t,e){var r={}.toString;t.exports=Array.isArray||function(t){return"[object Array]"==r.call(t)}},function(t,e){function r(t){return n&&Buffer.isBuffer(t)||o&&(t instanceof ArrayBuffer||i(t))}t.exports=r;var n="function"==typeof Buffer&&"function"==typeof Buffer.isBuffer,o="function"==typeof ArrayBuffer,i=function(t){return"function"==typeof ArrayBuffer.isView?ArrayBuffer.isView(t):t.buffer instanceof ArrayBuffer}},function(t,e,r){"use strict";function n(t,e){if(!(this instanceof n))return new n(t,e);t&&"object"===("undefined"==typeof t?"undefined":o(t))&&(e=t,t=void 0),e=e||{},e.path=e.path||"/socket.io",this.nsps={},this.subs=[],this.opts=e,this.reconnection(e.reconnection!==!1),this.reconnectionAttempts(e.reconnectionAttempts||1/0),this.reconnectionDelay(e.reconnectionDelay||1e3),this.reconnectionDelayMax(e.reconnectionDelayMax||5e3),this.randomizationFactor(e.randomizationFactor||.5),this.backoff=new f({min:this.reconnectionDelay(),max:this.reconnectionDelayMax(),jitter:this.randomizationFactor()}),this.timeout(null==e.timeout?2e4:e.timeout),this.readyState="closed",this.uri=t,this.connecting=[],this.lastPing=null,this.encoding=!1,this.packetBuffer=[];var r=e.parser||c;this.encoder=new r.Encoder,this.decoder=new r.Decoder,this.autoConnect=e.autoConnect!==!1,this.autoConnect&&this.open()}var o="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(t){return typeof t}:function(t){return t&&"function"==typeof Symbol&&t.constructor===Symbol&&t!==Symbol.prototype?"symbol":typeof t},i=r(10),s=r(33),a=r(5),c=r(4),p=r(35),h=r(36),u=(r(3)("socket.io-client:manager"),r(32)),f=r(37),l=Object.prototype.hasOwnProperty;t.exports=n,n.prototype.emitAll=function(){this.emit.apply(this,arguments);for(var t in this.nsps)l.call(this.nsps,t)&&this.nsps[t].emit.apply(this.nsps[t],arguments)},n.prototype.updateSocketIds=function(){for(var t in this.nsps)l.call(this.nsps,t)&&(this.nsps[t].id=this.generateId(t))},n.prototype.generateId=function(t){return("/"===t?"":t+"#")+this.engine.id},a(n.prototype),n.prototype.reconnection=function(t){return arguments.length?(this._reconnection=!!t,this):this._reconnection},n.prototype.reconnectionAttempts=function(t){return arguments.length?(this._reconnectionAttempts=t,this):this._reconnectionAttempts},n.prototype.reconnectionDelay=function(t){return arguments.length?(this._reconnectionDelay=t,this.backoff&&this.backoff.setMin(t),this):this._reconnectionDelay},n.prototype.randomizationFactor=function(t){return arguments.length?(this._randomizationFactor=t,this.backoff&&this.backoff.setJitter(t),this):this._randomizationFactor},n.prototype.reconnectionDelayMax=function(t){return arguments.length?(this._reconnectionDelayMax=t,this.backoff&&this.backoff.setMax(t),this):this._reconnectionDelayMax},n.prototype.timeout=function(t){return arguments.length?(this._timeout=t,this):this._timeout},n.prototype.maybeReconnectOnOpen=function(){!this.reconnecting&&this._reconnection&&0===this.backoff.attempts&&this.reconnect()},n.prototype.open=n.prototype.connect=function(t,e){if(~this.readyState.indexOf("open"))return this;this.engine=i(this.uri,this.opts);var r=this.engine,n=this;this.readyState="opening",this.skipReconnect=!1;var o=p(r,"open",function(){n.onopen(),t&&t()}),s=p(r,"error",function(e){if(n.cleanup(),n.readyState="closed",n.emitAll("connect_error",e),t){var r=new Error("Connection error");r.data=e,t(r)}else n.maybeReconnectOnOpen()});if(!1!==this._timeout){var a=this._timeout,c=setTimeout(function(){o.destroy(),r.close(),r.emit("error","timeout"),n.emitAll("connect_timeout",a)},a);this.subs.push({destroy:function(){clearTimeout(c)}})}return this.subs.push(o),this.subs.push(s),this},n.prototype.onopen=function(){this.cleanup(),this.readyState="open",this.emit("open");var t=this.engine;this.subs.push(p(t,"data",h(this,"ondata"))),this.subs.push(p(t,"ping",h(this,"onping"))),this.subs.push(p(t,"pong",h(this,"onpong"))),this.subs.push(p(t,"error",h(this,"onerror"))),this.subs.push(p(t,"close",h(this,"onclose"))),this.subs.push(p(this.decoder,"decoded",h(this,"ondecoded")))},n.prototype.onping=function(){this.lastPing=new Date,this.emitAll("ping")},n.prototype.onpong=function(){this.emitAll("pong",new Date-this.lastPing)},n.prototype.ondata=function(t){this.decoder.add(t)},n.prototype.ondecoded=function(t){this.emit("packet",t)},n.prototype.onerror=function(t){this.emitAll("error",t)},n.prototype.socket=function(t,e){function r(){~u(o.connecting,n)||o.connecting.push(n)}var n=this.nsps[t];if(!n){n=new s(this,t,e),this.nsps[t]=n;var o=this;n.on("connecting",r),n.on("connect",function(){n.id=o.generateId(t)}),this.autoConnect&&r()}return n},n.prototype.destroy=function(t){var e=u(this.connecting,t);~e&&this.connecting.splice(e,1),this.connecting.length||this.close()},n.prototype.packet=function(t){var e=this;t.query&&0===t.type&&(t.nsp+="?"+t.query),e.encoding?e.packetBuffer.push(t):(e.encoding=!0,this.encoder.encode(t,function(r){for(var n=0;n<r.length;n++)e.engine.write(r[n],t.options);e.encoding=!1,e.processPacketQueue()}))},n.prototype.processPacketQueue=function(){if(this.packetBuffer.length>0&&!this.encoding){var t=this.packetBuffer.shift();this.packet(t)}},n.prototype.cleanup=function(){for(var t=this.subs.length,e=0;e<t;e++){var r=this.subs.shift();r.destroy()}this.packetBuffer=[],this.encoding=!1,this.lastPing=null,this.decoder.destroy()},n.prototype.close=n.prototype.disconnect=function(){this.skipReconnect=!0,this.reconnecting=!1,"opening"===this.readyState&&this.cleanup(),this.backoff.reset(),this.readyState="closed",this.engine&&this.engine.close()},n.prototype.onclose=function(t){this.cleanup(),this.backoff.reset(),this.readyState="closed",this.emit("close",t),this._reconnection&&!this.skipReconnect&&this.reconnect()},n.prototype.reconnect=function(){if(this.reconnecting||this.skipReconnect)return this;var t=this;if(this.backoff.attempts>=this._reconnectionAttempts)this.backoff.reset(),this.emitAll("reconnect_failed"),this.reconnecting=!1;else{var e=this.backoff.duration();this.reconnecting=!0;var r=setTimeout(function(){t.skipReconnect||(t.emitAll("reconnect_attempt",t.backoff.attempts),t.emitAll("reconnecting",t.backoff.attempts),t.skipReconnect||t.open(function(e){e?(t.reconnecting=!1,t.reconnect(),t.emitAll("reconnect_error",e.data)):t.onreconnect()}))},e);this.subs.push({destroy:function(){clearTimeout(r)}})}},n.prototype.onreconnect=function(){var t=this.backoff.attempts;this.reconnecting=!1,this.backoff.reset(),this.updateSocketIds(),this.emitAll("reconnect",t)}},function(t,e,r){t.exports=r(11),t.exports.parser=r(18)},function(t,e,r){function n(t,e){return this instanceof n?(e=e||{},t&&"object"==typeof t&&(e=t,t=null),t?(t=p(t),e.hostname=t.host,e.secure="https"===t.protocol||"wss"===t.protocol,e.port=t.port,t.query&&(e.query=t.query)):e.host&&(e.hostname=p(e.host).host),this.secure=null!=e.secure?e.secure:"undefined"!=typeof location&&"https:"===location.protocol,e.hostname&&!e.port&&(e.port=this.secure?"443":"80"),this.agent=e.agent||!1,this.hostname=e.hostname||("undefined"!=typeof location?location.hostname:"localhost"),this.port=e.port||("undefined"!=typeof location&&location.port?location.port:this.secure?443:80),this.query=e.query||{},"string"==typeof this.query&&(this.query=h.decode(this.query)),this.upgrade=!1!==e.upgrade,this.path=(e.path||"/engine.io").replace(/\/$/,"")+"/",this.forceJSONP=!!e.forceJSONP,this.jsonp=!1!==e.jsonp,this.forceBase64=!!e.forceBase64,this.enablesXDR=!!e.enablesXDR,this.withCredentials=!1!==e.withCredentials,this.timestampParam=e.timestampParam||"t",this.timestampRequests=e.timestampRequests,this.transports=e.transports||["polling","websocket"],this.transportOptions=e.transportOptions||{},this.readyState="",this.writeBuffer=[],this.prevBufferLen=0,this.policyPort=e.policyPort||843,this.rememberUpgrade=e.rememberUpgrade||!1,this.binaryType=null,this.onlyBinaryUpgrades=e.onlyBinaryUpgrades,this.perMessageDeflate=!1!==e.perMessageDeflate&&(e.perMessageDeflate||{}),!0===this.perMessageDeflate&&(this.perMessageDeflate={}),this.perMessageDeflate&&null==this.perMessageDeflate.threshold&&(this.perMessageDeflate.threshold=1024),this.pfx=e.pfx||null,this.key=e.key||null,this.passphrase=e.passphrase||null,this.cert=e.cert||null,this.ca=e.ca||null,this.ciphers=e.ciphers||null,this.rejectUnauthorized=void 0===e.rejectUnauthorized||e.rejectUnauthorized,this.forceNode=!!e.forceNode,this.isReactNative="undefined"!=typeof navigator&&"string"==typeof navigator.product&&"reactnative"===navigator.product.toLowerCase(),("undefined"==typeof self||this.isReactNative)&&(e.extraHeaders&&Object.keys(e.extraHeaders).length>0&&(this.extraHeaders=e.extraHeaders),e.localAddress&&(this.localAddress=e.localAddress)),this.id=null,this.upgrades=null,this.pingInterval=null,this.pingTimeout=null,this.pingIntervalTimer=null,this.pingTimeoutTimer=null,void this.open()):new n(t,e)}function o(t){var e={};for(var r in t)t.hasOwnProperty(r)&&(e[r]=t[r]);return e}var i=r(12),s=r(5),a=(r(3)("engine.io-client:socket"),r(32)),c=r(18),p=r(2),h=r(26);t.exports=n,n.priorWebsocketSuccess=!1,s(n.prototype),n.protocol=c.protocol,n.Socket=n,n.Transport=r(17),n.transports=r(12),n.parser=r(18),n.prototype.createTransport=function(t){var e=o(this.query);e.EIO=c.protocol,e.transport=t;var r=this.transportOptions[t]||{};this.id&&(e.sid=this.id);var n=new i[t]({query:e,socket:this,agent:r.agent||this.agent,hostname:r.hostname||this.hostname,port:r.port||this.port,secure:r.secure||this.secure,path:r.path||this.path,forceJSONP:r.forceJSONP||this.forceJSONP,jsonp:r.jsonp||this.jsonp,forceBase64:r.forceBase64||this.forceBase64,enablesXDR:r.enablesXDR||this.enablesXDR,withCredentials:r.withCredentials||this.withCredentials,timestampRequests:r.timestampRequests||this.timestampRequests,timestampParam:r.timestampParam||this.timestampParam,policyPort:r.policyPort||this.policyPort,pfx:r.pfx||this.pfx,key:r.key||this.key,passphrase:r.passphrase||this.passphrase,cert:r.cert||this.cert,ca:r.ca||this.ca,ciphers:r.ciphers||this.ciphers,rejectUnauthorized:r.rejectUnauthorized||this.rejectUnauthorized,perMessageDeflate:r.perMessageDeflate||this.perMessageDeflate,extraHeaders:r.extraHeaders||this.extraHeaders,forceNode:r.forceNode||this.forceNode,localAddress:r.localAddress||this.localAddress,requestTimeout:r.requestTimeout||this.requestTimeout,protocols:r.protocols||void 0,isReactNative:this.isReactNative});return n},n.prototype.open=function(){var t;if(this.rememberUpgrade&&n.priorWebsocketSuccess&&this.transports.indexOf("websocket")!==-1)t="websocket";else{if(0===this.transports.length){var e=this;return void setTimeout(function(){e.emit("error","No transports available")},0)}t=this.transports[0]}this.readyState="opening";try{t=this.createTransport(t)}catch(t){return this.transports.shift(),void this.open()}t.open(),this.setTransport(t)},n.prototype.setTransport=function(t){var e=this;this.transport&&this.transport.removeAllListeners(),this.transport=t,t.on("drain",function(){e.onDrain()}).on("packet",function(t){e.onPacket(t)}).on("error",function(t){e.onError(t)}).on("close",function(){e.onClose("transport close")})},n.prototype.probe=function(t){function e(){if(u.onlyBinaryUpgrades){var t=!this.supportsBinary&&u.transport.supportsBinary;h=h||t}h||(p.send([{type:"ping",data:"probe"}]),p.once("packet",function(t){if(!h)if("pong"===t.type&&"probe"===t.data){if(u.upgrading=!0,u.emit("upgrading",p),!p)return;n.priorWebsocketSuccess="websocket"===p.name,u.transport.pause(function(){h||"closed"!==u.readyState&&(c(),u.setTransport(p),p.send([{type:"upgrade"}]),u.emit("upgrade",p),p=null,u.upgrading=!1,u.flush())})}else{var e=new Error("probe error");e.transport=p.name,u.emit("upgradeError",e)}}))}function r(){h||(h=!0,c(),p.close(),p=null)}function o(t){var e=new Error("probe error: "+t);e.transport=p.name,r(),u.emit("upgradeError",e)}function i(){o("transport closed")}function s(){o("socket closed")}function a(t){p&&t.name!==p.name&&r()}function c(){p.removeListener("open",e),p.removeListener("error",o),p.removeListener("close",i),u.removeListener("close",s),u.removeListener("upgrading",a)}var p=this.createTransport(t,{probe:1}),h=!1,u=this;n.priorWebsocketSuccess=!1,p.once("open",e),p.once("error",o),p.once("close",i),this.once("close",s),this.once("upgrading",a),p.open()},n.prototype.onOpen=function(){if(this.readyState="open",n.priorWebsocketSuccess="websocket"===this.transport.name,this.emit("open"),this.flush(),"open"===this.readyState&&this.upgrade&&this.transport.pause)for(var t=0,e=this.upgrades.length;t<e;t++)this.probe(this.upgrades[t])},n.prototype.onPacket=function(t){if("opening"===this.readyState||"open"===this.readyState||"closing"===this.readyState)switch(this.emit("packet",t),this.emit("heartbeat"),t.type){case"open":this.onHandshake(JSON.parse(t.data));break;case"pong":this.setPing(),this.emit("pong");break;case"error":var e=new Error("server error");e.code=t.data,this.onError(e);break;case"message":this.emit("data",t.data),this.emit("message",t.data)}},n.prototype.onHandshake=function(t){this.emit("handshake",t),this.id=t.sid,this.transport.query.sid=t.sid,this.upgrades=this.filterUpgrades(t.upgrades),this.pingInterval=t.pingInterval,this.pingTimeout=t.pingTimeout,this.onOpen(),"closed"!==this.readyState&&(this.setPing(),this.removeListener("heartbeat",this.onHeartbeat),this.on("heartbeat",this.onHeartbeat))},n.prototype.onHeartbeat=function(t){clearTimeout(this.pingTimeoutTimer);var e=this;e.pingTimeoutTimer=setTimeout(function(){"closed"!==e.readyState&&e.onClose("ping timeout")},t||e.pingInterval+e.pingTimeout)},n.prototype.setPing=function(){var t=this;clearTimeout(t.pingIntervalTimer),t.pingIntervalTimer=setTimeout(function(){t.ping(),t.onHeartbeat(t.pingTimeout)},t.pingInterval)},n.prototype.ping=function(){var t=this;this.sendPacket("ping",function(){t.emit("ping")})},n.prototype.onDrain=function(){this.writeBuffer.splice(0,this.prevBufferLen),this.prevBufferLen=0,0===this.writeBuffer.length?this.emit("drain"):this.flush()},n.prototype.flush=function(){"closed"!==this.readyState&&this.transport.writable&&!this.upgrading&&this.writeBuffer.length&&(this.transport.send(this.writeBuffer),this.prevBufferLen=this.writeBuffer.length,this.emit("flush"))},n.prototype.write=n.prototype.send=function(t,e,r){return this.sendPacket("message",t,e,r),this},n.prototype.sendPacket=function(t,e,r,n){if("function"==typeof e&&(n=e,e=void 0),"function"==typeof r&&(n=r,r=null),"closing"!==this.readyState&&"closed"!==this.readyState){r=r||{},r.compress=!1!==r.compress;var o={type:t,data:e,options:r};this.emit("packetCreate",o),this.writeBuffer.push(o),n&&this.once("flush",n),this.flush()}},n.prototype.close=function(){function t(){n.onClose("forced close"),n.transport.close()}function e(){n.removeListener("upgrade",e),n.removeListener("upgradeError",e),t()}function r(){n.once("upgrade",e),n.once("upgradeError",e)}if("opening"===this.readyState||"open"===this.readyState){this.readyState="closing";var n=this;this.writeBuffer.length?this.once("drain",function(){this.upgrading?r():t()}):this.upgrading?r():t()}return this},n.prototype.onError=function(t){n.priorWebsocketSuccess=!1,this.emit("error",t),this.onClose("transport error",t)},n.prototype.onClose=function(t,e){if("opening"===this.readyState||"open"===this.readyState||"closing"===this.readyState){var r=this;clearTimeout(this.pingIntervalTimer),clearTimeout(this.pingTimeoutTimer),this.transport.removeAllListeners("close"),this.transport.close(),this.transport.removeAllListeners(),this.readyState="closed",this.id=null,this.emit("close",t,e),r.writeBuffer=[],r.prevBufferLen=0}},n.prototype.filterUpgrades=function(t){for(var e=[],r=0,n=t.length;r<n;r++)~a(this.transports,t[r])&&e.push(t[r]);return e}},function(t,e,r){function n(t){var e,r=!1,n=!1,a=!1!==t.jsonp;if("undefined"!=typeof location){var c="https:"===location.protocol,p=location.port;p||(p=c?443:80),r=t.hostname!==location.hostname||p!==t.port,n=t.secure!==c}if(t.xdomain=r,t.xscheme=n,e=new o(t),"open"in e&&!t.forceJSONP)return new i(t);if(!a)throw new Error("JSONP disabled");return new s(t)}var o=r(13),i=r(15),s=r(29),a=r(30);e.polling=n,e.websocket=a},function(t,e,r){var n=r(14);t.exports=function(t){var e=t.xdomain,r=t.xscheme,o=t.enablesXDR;try{if("undefined"!=typeof XMLHttpRequest&&(!e||n))return new XMLHttpRequest}catch(t){}try{if("undefined"!=typeof XDomainRequest&&!r&&o)return new XDomainRequest}catch(t){}if(!e)try{return new(self[["Active"].concat("Object").join("X")])("Microsoft.XMLHTTP")}catch(t){}}},function(t,e){try{t.exports="undefined"!=typeof XMLHttpRequest&&"withCredentials"in new XMLHttpRequest}catch(e){t.exports=!1}},function(t,e,r){function n(){}function o(t){if(c.call(this,t),this.requestTimeout=t.requestTimeout,this.extraHeaders=t.extraHeaders,"undefined"!=typeof location){var e="https:"===location.protocol,r=location.port;r||(r=e?443:80),this.xd="undefined"!=typeof location&&t.hostname!==location.hostname||r!==t.port,this.xs=t.secure!==e}}function i(t){this.method=t.method||"GET",this.uri=t.uri,this.xd=!!t.xd,this.xs=!!t.xs,this.async=!1!==t.async,this.data=void 0!==t.data?t.data:null,this.agent=t.agent,this.isBinary=t.isBinary,this.supportsBinary=t.supportsBinary,this.enablesXDR=t.enablesXDR,this.withCredentials=t.withCredentials,this.requestTimeout=t.requestTimeout,this.pfx=t.pfx,this.key=t.key,this.passphrase=t.passphrase,this.cert=t.cert,this.ca=t.ca,this.ciphers=t.ciphers,this.rejectUnauthorized=t.rejectUnauthorized,this.extraHeaders=t.extraHeaders,this.create()}function s(){for(var t in i.requests)i.requests.hasOwnProperty(t)&&i.requests[t].abort()}var a=r(13),c=r(16),p=r(5),h=r(27);r(3)("engine.io-client:polling-xhr");if(t.exports=o,t.exports.Request=i,h(o,c),o.prototype.supportsBinary=!0,o.prototype.request=function(t){return t=t||{},t.uri=this.uri(),t.xd=this.xd,t.xs=this.xs,t.agent=this.agent||!1,t.supportsBinary=this.supportsBinary,t.enablesXDR=this.enablesXDR,t.withCredentials=this.withCredentials,t.pfx=this.pfx,t.key=this.key,t.passphrase=this.passphrase,t.cert=this.cert,t.ca=this.ca,t.ciphers=this.ciphers,t.rejectUnauthorized=this.rejectUnauthorized,t.requestTimeout=this.requestTimeout,t.extraHeaders=this.extraHeaders,new i(t)},o.prototype.doWrite=function(t,e){var r="string"!=typeof t&&void 0!==t,n=this.request({method:"POST",data:t,isBinary:r}),o=this;n.on("success",e),n.on("error",function(t){o.onError("xhr post error",t)}),this.sendXhr=n},o.prototype.doPoll=function(){var t=this.request(),e=this;t.on("data",function(t){e.onData(t)}),t.on("error",function(t){e.onError("xhr poll error",t)}),this.pollXhr=t},p(i.prototype),i.prototype.create=function(){var t={agent:this.agent,xdomain:this.xd,xscheme:this.xs,enablesXDR:this.enablesXDR};t.pfx=this.pfx,t.key=this.key,t.passphrase=this.passphrase,t.cert=this.cert,t.ca=this.ca,t.ciphers=this.ciphers,t.rejectUnauthorized=this.rejectUnauthorized;var e=this.xhr=new a(t),r=this;try{e.open(this.method,this.uri,this.async);try{if(this.extraHeaders){e.setDisableHeaderCheck&&e.setDisableHeaderCheck(!0);for(var n in this.extraHeaders)this.extraHeaders.hasOwnProperty(n)&&e.setRequestHeader(n,this.extraHeaders[n])}}catch(t){}if("POST"===this.method)try{this.isBinary?e.setRequestHeader("Content-type","application/octet-stream"):e.setRequestHeader("Content-type","text/plain;charset=UTF-8")}catch(t){}try{e.setRequestHeader("Accept","*/*")}catch(t){}"withCredentials"in e&&(e.withCredentials=this.withCredentials),this.requestTimeout&&(e.timeout=this.requestTimeout),this.hasXDR()?(e.onload=function(){r.onLoad()},e.onerror=function(){r.onError(e.responseText)}):e.onreadystatechange=function(){if(2===e.readyState)try{var t=e.getResponseHeader("Content-Type");(r.supportsBinary&&"application/octet-stream"===t||"application/octet-stream; charset=UTF-8"===t)&&(e.responseType="arraybuffer")}catch(t){}4===e.readyState&&(200===e.status||1223===e.status?r.onLoad():setTimeout(function(){r.onError("number"==typeof e.status?e.status:0)},0))},e.send(this.data)}catch(t){return void setTimeout(function(){r.onError(t)},0)}"undefined"!=typeof document&&(this.index=i.requestsCount++,i.requests[this.index]=this)},i.prototype.onSuccess=function(){this.emit("success"),this.cleanup()},i.prototype.onData=function(t){this.emit("data",t),this.onSuccess()},i.prototype.onError=function(t){this.emit("error",t),this.cleanup(!0)},i.prototype.cleanup=function(t){if("undefined"!=typeof this.xhr&&null!==this.xhr){if(this.hasXDR()?this.xhr.onload=this.xhr.onerror=n:this.xhr.onreadystatechange=n,t)try{this.xhr.abort()}catch(t){}"undefined"!=typeof document&&delete i.requests[this.index],this.xhr=null}},i.prototype.onLoad=function(){var t;try{var e;try{e=this.xhr.getResponseHeader("Content-Type")}catch(t){}t="application/octet-stream"===e||"application/octet-stream; charset=UTF-8"===e?this.xhr.response||this.xhr.responseText:this.xhr.responseText}catch(t){this.onError(t)}null!=t&&this.onData(t)},i.prototype.hasXDR=function(){return"undefined"!=typeof XDomainRequest&&!this.xs&&this.enablesXDR},i.prototype.abort=function(){this.cleanup()},i.requestsCount=0,i.requests={},"undefined"!=typeof document)if("function"==typeof attachEvent)attachEvent("onunload",s);else if("function"==typeof addEventListener){var u="onpagehide"in self?"pagehide":"unload";addEventListener(u,s,!1)}},function(t,e,r){function n(t){var e=t&&t.forceBase64;p&&!e||(this.supportsBinary=!1),o.call(this,t)}var o=r(17),i=r(26),s=r(18),a=r(27),c=r(28);r(3)("engine.io-client:polling");t.exports=n;var p=function(){var t=r(13),e=new t({xdomain:!1});return null!=e.responseType}();a(n,o),n.prototype.name="polling",n.prototype.doOpen=function(){this.poll()},n.prototype.pause=function(t){function e(){r.readyState="paused",t()}var r=this;if(this.readyState="pausing",this.polling||!this.writable){var n=0;this.polling&&(n++,this.once("pollComplete",function(){--n||e()})),this.writable||(n++,this.once("drain",function(){--n||e()}))}else e()},n.prototype.poll=function(){this.polling=!0,this.doPoll(),this.emit("poll")},n.prototype.onData=function(t){var e=this,r=function(t,r,n){return"opening"===e.readyState&&e.onOpen(),"close"===t.type?(e.onClose(),!1):void e.onPacket(t)};s.decodePayload(t,this.socket.binaryType,r),"closed"!==this.readyState&&(this.polling=!1,this.emit("pollComplete"),"open"===this.readyState&&this.poll())},n.prototype.doClose=function(){function t(){e.write([{type:"close"}])}var e=this;"open"===this.readyState?t():this.once("open",t)},n.prototype.write=function(t){var e=this;this.writable=!1;var r=function(){e.writable=!0,e.emit("drain")};s.encodePayload(t,this.supportsBinary,function(t){e.doWrite(t,r)})},n.prototype.uri=function(){var t=this.query||{},e=this.secure?"https":"http",r="";!1!==this.timestampRequests&&(t[this.timestampParam]=c()),this.supportsBinary||t.sid||(t.b64=1),t=i.encode(t),this.port&&("https"===e&&443!==Number(this.port)||"http"===e&&80!==Number(this.port))&&(r=":"+this.port),t.length&&(t="?"+t);var n=this.hostname.indexOf(":")!==-1;return e+"://"+(n?"["+this.hostname+"]":this.hostname)+r+this.path+t}},function(t,e,r){function n(t){this.path=t.path,this.hostname=t.hostname,this.port=t.port,this.secure=t.secure,this.query=t.query,this.timestampParam=t.timestampParam,this.timestampRequests=t.timestampRequests,this.readyState="",this.agent=t.agent||!1,this.socket=t.socket,this.enablesXDR=t.enablesXDR,this.withCredentials=t.withCredentials,this.pfx=t.pfx,this.key=t.key,this.passphrase=t.passphrase,this.cert=t.cert,this.ca=t.ca,this.ciphers=t.ciphers,this.rejectUnauthorized=t.rejectUnauthorized,this.forceNode=t.forceNode,this.isReactNative=t.isReactNative,this.extraHeaders=t.extraHeaders,this.localAddress=t.localAddress}var o=r(18),i=r(5);t.exports=n,i(n.prototype),n.prototype.onError=function(t,e){var r=new Error(t);return r.type="TransportError",r.description=e,this.emit("error",r),this},n.prototype.open=function(){return"closed"!==this.readyState&&""!==this.readyState||(this.readyState="opening",this.doOpen()),this},n.prototype.close=function(){return"opening"!==this.readyState&&"open"!==this.readyState||(this.doClose(),this.onClose()),this},n.prototype.send=function(t){if("open"!==this.readyState)throw new Error("Transport not open");
7 | this.write(t)},n.prototype.onOpen=function(){this.readyState="open",this.writable=!0,this.emit("open")},n.prototype.onData=function(t){var e=o.decodePacket(t,this.socket.binaryType);this.onPacket(e)},n.prototype.onPacket=function(t){this.emit("packet",t)},n.prototype.onClose=function(){this.readyState="closed",this.emit("close")}},function(t,e,r){function n(t,r){var n="b"+e.packets[t.type]+t.data.data;return r(n)}function o(t,r,n){if(!r)return e.encodeBase64Packet(t,n);var o=t.data,i=new Uint8Array(o),s=new Uint8Array(1+o.byteLength);s[0]=v[t.type];for(var a=0;a<i.length;a++)s[a+1]=i[a];return n(s.buffer)}function i(t,r,n){if(!r)return e.encodeBase64Packet(t,n);var o=new FileReader;return o.onload=function(){e.encodePacket({type:t.type,data:o.result},r,!0,n)},o.readAsArrayBuffer(t.data)}function s(t,r,n){if(!r)return e.encodeBase64Packet(t,n);if(g)return i(t,r,n);var o=new Uint8Array(1);o[0]=v[t.type];var s=new w([o.buffer,t.data]);return n(s)}function a(t){try{t=d.decode(t,{strict:!1})}catch(t){return!1}return t}function c(t,e,r){for(var n=new Array(t.length),o=l(t.length,r),i=function(t,r,o){e(r,function(e,r){n[t]=r,o(e,n)})},s=0;s<t.length;s++)i(s,t[s],o)}var p,h=r(19),u=r(20),f=r(21),l=r(22),d=r(23);"undefined"!=typeof ArrayBuffer&&(p=r(24));var y="undefined"!=typeof navigator&&/Android/i.test(navigator.userAgent),m="undefined"!=typeof navigator&&/PhantomJS/i.test(navigator.userAgent),g=y||m;e.protocol=3;var v=e.packets={open:0,close:1,ping:2,pong:3,message:4,upgrade:5,noop:6},b=h(v),k={type:"error",data:"parser error"},w=r(25);e.encodePacket=function(t,e,r,i){"function"==typeof e&&(i=e,e=!1),"function"==typeof r&&(i=r,r=null);var a=void 0===t.data?void 0:t.data.buffer||t.data;if("undefined"!=typeof ArrayBuffer&&a instanceof ArrayBuffer)return o(t,e,i);if("undefined"!=typeof w&&a instanceof w)return s(t,e,i);if(a&&a.base64)return n(t,i);var c=v[t.type];return void 0!==t.data&&(c+=r?d.encode(String(t.data),{strict:!1}):String(t.data)),i(""+c)},e.encodeBase64Packet=function(t,r){var n="b"+e.packets[t.type];if("undefined"!=typeof w&&t.data instanceof w){var o=new FileReader;return o.onload=function(){var t=o.result.split(",")[1];r(n+t)},o.readAsDataURL(t.data)}var i;try{i=String.fromCharCode.apply(null,new Uint8Array(t.data))}catch(e){for(var s=new Uint8Array(t.data),a=new Array(s.length),c=0;c<s.length;c++)a[c]=s[c];i=String.fromCharCode.apply(null,a)}return n+=btoa(i),r(n)},e.decodePacket=function(t,r,n){if(void 0===t)return k;if("string"==typeof t){if("b"===t.charAt(0))return e.decodeBase64Packet(t.substr(1),r);if(n&&(t=a(t),t===!1))return k;var o=t.charAt(0);return Number(o)==o&&b[o]?t.length>1?{type:b[o],data:t.substring(1)}:{type:b[o]}:k}var i=new Uint8Array(t),o=i[0],s=f(t,1);return w&&"blob"===r&&(s=new w([s])),{type:b[o],data:s}},e.decodeBase64Packet=function(t,e){var r=b[t.charAt(0)];if(!p)return{type:r,data:{base64:!0,data:t.substr(1)}};var n=p.decode(t.substr(1));return"blob"===e&&w&&(n=new w([n])),{type:r,data:n}},e.encodePayload=function(t,r,n){function o(t){return t.length+":"+t}function i(t,n){e.encodePacket(t,!!s&&r,!1,function(t){n(null,o(t))})}"function"==typeof r&&(n=r,r=null);var s=u(t);return r&&s?w&&!g?e.encodePayloadAsBlob(t,n):e.encodePayloadAsArrayBuffer(t,n):t.length?void c(t,i,function(t,e){return n(e.join(""))}):n("0:")},e.decodePayload=function(t,r,n){if("string"!=typeof t)return e.decodePayloadAsBinary(t,r,n);"function"==typeof r&&(n=r,r=null);var o;if(""===t)return n(k,0,1);for(var i,s,a="",c=0,p=t.length;c<p;c++){var h=t.charAt(c);if(":"===h){if(""===a||a!=(i=Number(a)))return n(k,0,1);if(s=t.substr(c+1,i),a!=s.length)return n(k,0,1);if(s.length){if(o=e.decodePacket(s,r,!1),k.type===o.type&&k.data===o.data)return n(k,0,1);var u=n(o,c+i,p);if(!1===u)return}c+=i,a=""}else a+=h}return""!==a?n(k,0,1):void 0},e.encodePayloadAsArrayBuffer=function(t,r){function n(t,r){e.encodePacket(t,!0,!0,function(t){return r(null,t)})}return t.length?void c(t,n,function(t,e){var n=e.reduce(function(t,e){var r;return r="string"==typeof e?e.length:e.byteLength,t+r.toString().length+r+2},0),o=new Uint8Array(n),i=0;return e.forEach(function(t){var e="string"==typeof t,r=t;if(e){for(var n=new Uint8Array(t.length),s=0;s<t.length;s++)n[s]=t.charCodeAt(s);r=n.buffer}e?o[i++]=0:o[i++]=1;for(var a=r.byteLength.toString(),s=0;s<a.length;s++)o[i++]=parseInt(a[s]);o[i++]=255;for(var n=new Uint8Array(r),s=0;s<n.length;s++)o[i++]=n[s]}),r(o.buffer)}):r(new ArrayBuffer(0))},e.encodePayloadAsBlob=function(t,r){function n(t,r){e.encodePacket(t,!0,!0,function(t){var e=new Uint8Array(1);if(e[0]=1,"string"==typeof t){for(var n=new Uint8Array(t.length),o=0;o<t.length;o++)n[o]=t.charCodeAt(o);t=n.buffer,e[0]=0}for(var i=t instanceof ArrayBuffer?t.byteLength:t.size,s=i.toString(),a=new Uint8Array(s.length+1),o=0;o<s.length;o++)a[o]=parseInt(s[o]);if(a[s.length]=255,w){var c=new w([e.buffer,a.buffer,t]);r(null,c)}})}c(t,n,function(t,e){return r(new w(e))})},e.decodePayloadAsBinary=function(t,r,n){"function"==typeof r&&(n=r,r=null);for(var o=t,i=[];o.byteLength>0;){for(var s=new Uint8Array(o),a=0===s[0],c="",p=1;255!==s[p];p++){if(c.length>310)return n(k,0,1);c+=s[p]}o=f(o,2+c.length),c=parseInt(c);var h=f(o,0,c);if(a)try{h=String.fromCharCode.apply(null,new Uint8Array(h))}catch(t){var u=new Uint8Array(h);h="";for(var p=0;p<u.length;p++)h+=String.fromCharCode(u[p])}i.push(h),o=f(o,c)}var l=i.length;i.forEach(function(t,o){n(e.decodePacket(t,r,!0),o,l)})}},function(t,e){t.exports=Object.keys||function(t){var e=[],r=Object.prototype.hasOwnProperty;for(var n in t)r.call(t,n)&&e.push(n);return e}},function(t,e,r){function n(t){if(!t||"object"!=typeof t)return!1;if(o(t)){for(var e=0,r=t.length;e<r;e++)if(n(t[e]))return!0;return!1}if("function"==typeof 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r}t.exports=r},function(t,e){"use strict";function r(t,e,r){return t.on(e,r),{destroy:function(){t.removeListener(e,r)}}}t.exports=r},function(t,e){var r=[].slice;t.exports=function(t,e){if("string"==typeof e&&(e=t[e]),"function"!=typeof e)throw new Error("bind() requires a function");var n=r.call(arguments,2);return function(){return e.apply(t,n.concat(r.call(arguments)))}}},function(t,e){function r(t){t=t||{},this.ms=t.min||100,this.max=t.max||1e4,this.factor=t.factor||2,this.jitter=t.jitter>0&&t.jitter<=1?t.jitter:0,this.attempts=0}t.exports=r,r.prototype.duration=function(){var t=this.ms*Math.pow(this.factor,this.attempts++);if(this.jitter){var e=Math.random(),r=Math.floor(e*this.jitter*t);t=0==(1&Math.floor(10*e))?t-r:t+r}return 0|Math.min(t,this.max)},r.prototype.reset=function(){this.attempts=0},r.prototype.setMin=function(t){this.ms=t},r.prototype.setMax=function(t){this.max=t},r.prototype.setJitter=function(t){this.jitter=t}}])});
9 | //# sourceMappingURL=socket.io.slim.js.map


--------------------------------------------------------------------------------
/remote-access-app/client/index.html:
--------------------------------------------------------------------------------
 1 | <!DOCTYPE html>
 2 | <html lang="en">
 3 |   <head>
 4 |     <meta charset="UTF-8" />
 5 |     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
 6 |     <title>Remote Access App</title>
 7 |     <link href="./resources/bootstrap.min.css" rel="stylesheet" />
 8 |     <style>
 9 |       body {
10 |         background: white;
11 |         display: -webkit-flex;
12 |         margin: 400px;
13 |         -webkit-justify-content: center;
14 |         -webkit-align-items: center;
15 |         -webkit-flex-direction: column;
16 |       }
17 |     </style>
18 |   </head>
19 |   <body>
20 |         
21 |     <div class="row">
22 |         <div class="col-md-12">
23 |             <div class="nav nav-pills flex-column ">
24 |                 <a class="flex-sm-fill text-sm-center nav-link btn btn-info " href="watcher/index.html" target="__blank">Watcher</a>
25 |             </div>
26 |             <br/>
27 |             <div class="nav nav-pills flex-column ">
28 |                 <a class="flex-sm-fill text-sm-center nav-link btn btn-success " href="sharer/index.html" target="__blank">Sharer</a>
29 |             </div>
30 |         </div>
31 | 
32 |     </div>
33 |   </body>
34 | </html>
35 | 


--------------------------------------------------------------------------------
/remote-access-app/client/package-lock.json:
--------------------------------------------------------------------------------
  1 | {
  2 |   "name": "client",
  3 |   "version": "1.0.0",
  4 |   "lockfileVersion": 1,
  5 |   "requires": true,
  6 |   "dependencies": {
  7 |     "accepts": {
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  9 |       "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
 10 |       "integrity": "sha512-Il80Qs2WjYlJIBNzNkK6KYqlVMTbZLXgHx2oT0pU/fjRHyEp+PEfEPY0R3WCwAGVOtauxh1hOxNgIf5bv7dQpA==",
 11 |       "requires": {
 12 |         "mime-types": "~2.1.24",
 13 |         "negotiator": "0.6.2"
 14 |       }
 15 |     },
 16 |     "after": {
 17 |       "version": "0.8.2",
 18 |       "resolved": "https://registry.npmjs.org/after/-/after-0.8.2.tgz",
 19 |       "integrity": "sha1-/ts5T58OAqqXaOcCvaI7UF+ufh8="
 20 |     },
 21 |     "arraybuffer.slice": {
 22 |       "version": "0.0.7",
 23 |       "resolved": "https://registry.npmjs.org/arraybuffer.slice/-/arraybuffer.slice-0.0.7.tgz",
 24 |       "integrity": "sha512-wGUIVQXuehL5TCqQun8OW81jGzAWycqzFF8lFp+GOM5BXLYj3bKNsYC4daB7n6XjCqxQA/qgTJ+8ANR3acjrog=="
 25 |     },
 26 |     "async": {
 27 |       "version": "2.6.3",
 28 |       "resolved": "https://registry.npmjs.org/async/-/async-2.6.3.tgz",
 29 |       "integrity": "sha512-zflvls11DCy+dQWzTW2dzuilv8Z5X/pjfmZOWba6TNIVDm+2UDaJmXSOXlasHKfNBs8oo3M0aT50fDEWfKZjXg==",
 30 |       "dev": true,
 31 |       "requires": {
 32 |         "lodash": "^4.17.14"
 33 |       }
 34 |     },
 35 |     "async-limiter": {
 36 |       "version": "1.0.1",
 37 |       "resolved": "https://registry.npmjs.org/async-limiter/-/async-limiter-1.0.1.tgz",
 38 |       "integrity": "sha512-csOlWGAcRFJaI6m+F2WKdnMKr4HhdhFVBk0H/QbJFMCr+uO2kwohwXQPxw/9OCxp05r5ghVBFSyioixx3gfkNQ=="
 39 |     },
 40 |     "backo2": {
 41 |       "version": "1.0.2",
 42 |       "resolved": "https://registry.npmjs.org/backo2/-/backo2-1.0.2.tgz",
 43 |       "integrity": "sha1-MasayLEpNjRj41s+u2n038+6eUc="
 44 |     },
 45 |     "base64-arraybuffer": {
 46 |       "version": "0.1.5",
 47 |       "resolved": "https://registry.npmjs.org/base64-arraybuffer/-/base64-arraybuffer-0.1.5.tgz",
 48 |       "integrity": "sha1-c5JncZI7Whl0etZmqlzUv5xunOg="
 49 |     },
 50 |     "base64id": {
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444 |                 "ms": "2.0.0"
445 |               }
446 |             }
447 |           }
448 |         }
449 |       }
450 |     },
451 |     "socket.io-parser": {
452 |       "version": "3.4.0",
453 |       "resolved": "https://registry.npmjs.org/socket.io-parser/-/socket.io-parser-3.4.0.tgz",
454 |       "integrity": "sha512-/G/VOI+3DBp0+DJKW4KesGnQkQPFmUCbA/oO2QGT6CWxU7hLGWqU3tyuzeSK/dqcyeHsQg1vTe9jiZI8GU9SCQ==",
455 |       "requires": {
456 |         "component-emitter": "1.2.1",
457 |         "debug": "~4.1.0",
458 |         "isarray": "2.0.1"
459 |       }
460 |     },
461 |     "to-array": {
462 |       "version": "0.1.4",
463 |       "resolved": "https://registry.npmjs.org/to-array/-/to-array-0.1.4.tgz",
464 |       "integrity": "sha1-F+bBH3PdTz10zaek/zI46a2b+JA="
465 |     },
466 |     "union": {
467 |       "version": "0.5.0",
468 |       "resolved": "https://registry.npmjs.org/union/-/union-0.5.0.tgz",
469 |       "integrity": "sha512-N6uOhuW6zO95P3Mel2I2zMsbsanvvtgn6jVqJv4vbVcz/JN0OkL9suomjQGmWtxJQXOCqUJvquc1sMeNz/IwlA==",
470 |       "dev": true,
471 |       "requires": {
472 |         "qs": "^6.4.0"
473 |       }
474 |     },
475 |     "url-join": {
476 |       "version": "2.0.5",
477 |       "resolved": "https://registry.npmjs.org/url-join/-/url-join-2.0.5.tgz",
478 |       "integrity": "sha1-WvIvGMBSoACkjXuCxenC4v7tpyg=",
479 |       "dev": true
480 |     },
481 |     "ws": {
482 |       "version": "7.3.0",
483 |       "resolved": "https://registry.npmjs.org/ws/-/ws-7.3.0.tgz",
484 |       "integrity": "sha512-iFtXzngZVXPGgpTlP1rBqsUK82p9tKqsWRPg5L56egiljujJT3vGAYnHANvFxBieXrTFavhzhxW52jnaWV+w2w=="
485 |     },
486 |     "xmlhttprequest-ssl": {
487 |       "version": "1.5.5",
488 |       "resolved": "https://registry.npmjs.org/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.5.5.tgz",
489 |       "integrity": "sha1-wodrBhaKrcQOV9l+gRkayPQ5iz4="
490 |     },
491 |     "yeast": {
492 |       "version": "0.1.2",
493 |       "resolved": "https://registry.npmjs.org/yeast/-/yeast-0.1.2.tgz",
494 |       "integrity": "sha1-AI4G2AlDIMNy28L47XagymyKxBk="
495 |     }
496 |   }
497 | }
498 | 


--------------------------------------------------------------------------------
/remote-access-app/client/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "client",
 3 |   "version": "1.0.0",
 4 |   "description": "",
 5 |   "main": "index.js",
 6 |   "scripts": {
 7 |     "start": "npx http-server -p $PORT ."
 8 |   },
 9 |   "keywords": [],
10 |   "author": "",
11 |   "license": "ISC",
12 |   "dependencies": {
13 |     "socket.io": "^2.3.0",
14 |     "socket.io-client": "^2.3.0",
15 |     "http-server": "^0.12.3"
16 |   }
17 | }
18 | 


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/remote-access-app/client/resources/desktop.png:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/ErickWendel/talk-deep-dive-into-nodejs-streams/3f041416f2e73fb005de6a4adb2beca736efe255/remote-access-app/client/resources/desktop.png


--------------------------------------------------------------------------------
/remote-access-app/client/sharer/app.js:
--------------------------------------------------------------------------------
 1 | let host = prompt('What is your socket server host?')
 2 | if (!host) host = "http://localhost:4000"
 3 | 
 4 | const socket = io.connect(host);
 5 | 
 6 | async function initialize() {
 7 |   console.log('initializing..')
 8 |   const remoteScreen = new RemoteScreen({ socket })
 9 |   await remoteScreen.showSources();
10 | }
11 | 
12 | window.onload = async function () {
13 |   socket.on('connect', initialize);
14 | }
15 | 
16 | 
17 | 
18 | 
19 | 


--------------------------------------------------------------------------------
/remote-access-app/client/sharer/index.html:
--------------------------------------------------------------------------------
 1 | <html>
 2 |   <head> 
 3 |     <title>Sharer!</title>
 4 |     <link href="./../resources/bootstrap.min.css" rel="stylesheet" />
 5 |     <style>
 6 |      
 7 |       body {
 8 |         background: white;
 9 |         display: -webkit-flex;
10 |         -webkit-justify-content: center;
11 |         -webkit-align-items: center;
12 |         -webkit-flex-direction: column;
13 |       }
14 |       video {
15 |         width: 800px; 
16 |         background: rgba(0, 0, 0, 0.25);
17 |      
18 |         background: white url(../resources/desktop.png) center no-repeat;
19 |         border: 1px solid black;
20 |         box-shadow: 0 1px 1px rgba(0, 0, 0, 0.2);
21 |       }  
22 |     </style>
23 |   </head>
24 |   <body>
25 |      
26 |     <section class="select">
27 |       <label for="audioSource">Audio source: </label>
28 |       <select id="audioSource"></select>
29 |     </section>
30 | 
31 |     <section class="select">
32 |       <label for="videoSource">Video source: </label>
33 |       <select id="videoSource"></select>
34 |     </section>
35 |     
36 |     <div class="row">
37 |       <div class="col">
38 |         <video id="camera" autoplay></video>
39 |       </div>
40 |       <div class="col">
41 |         <video id="screen" autoplay></video>
42 |       </div>
43 |     </div>
44 | 
45 |     <!-- <video autoplay></video>  -->
46 | 
47 |     <script src="./../deps/socket.io.slim.js"></script>
48 |     <script src="./screen.js"></script>
49 |     <script src="./app.js"></script>
50 |   </body>
51 | </html>
52 | 


--------------------------------------------------------------------------------
/remote-access-app/client/sharer/screen.js:
--------------------------------------------------------------------------------
  1 | // const { name: appName } = require('./../package.json')
  2 | const peerConnections = {};
  3 | const config = {
  4 |     iceServers: [
  5 |         {
  6 |             urls: ["stun:stun.l.google.com:19302"]
  7 |         }
  8 |     ]
  9 | };
 10 | const videoCamera = document.getElementById('camera')
 11 | const videoScreen = document.getElementById('screen')
 12 | 
 13 | const audioSelect = document.querySelector("select#audioSource");
 14 | const videoSelect = document.querySelector("select#videoSource");
 15 | 
 16 | 
 17 | function getDevices() {
 18 |     return navigator.mediaDevices.enumerateDevices();
 19 | }
 20 | 
 21 | function gotDevices(deviceInfos) {
 22 |     window.deviceInfos = deviceInfos;
 23 |     for (const deviceInfo of deviceInfos) {
 24 |         const option = document.createElement("option");
 25 |         option.value = deviceInfo.deviceId;
 26 |         if (deviceInfo.kind === "audioinput") {
 27 |             option.text = deviceInfo.label || `Microphone ${audioSelect.length + 1}`;
 28 |             audioSelect.appendChild(option);
 29 |         } else if (deviceInfo.kind === "videoinput") {
 30 |             option.text = deviceInfo.label || `Camera ${videoSelect.length + 1}`;
 31 |             videoSelect.appendChild(option);
 32 |         }
 33 |     }
 34 | }
 35 | 
 36 | async function getCameraStream() {
 37 |     if (window.cameraScreen) {
 38 |         window.cameraScreen.getTracks().forEach(track => {
 39 |             track.stop();
 40 |         });
 41 |     }
 42 |     const audioSource = audioSelect.value;
 43 |     const videoSource = videoSelect.value;
 44 |     const constraints = {
 45 |         audio: { deviceId: audioSource ? { exact: audioSource } : undefined },
 46 |         video: { deviceId: videoSource ? { exact: videoSource } : undefined }
 47 |     };
 48 |     const str = await navigator.mediaDevices.getUserMedia(constraints)
 49 |     return handleSelects(str)
 50 | }
 51 | 
 52 | function handleSelects(stream) {
 53 |     window.cameraScreen = stream;
 54 |     audioSelect.selectedIndex = [...audioSelect.options].findIndex(
 55 |         option => option.text === stream.getAudioTracks()[0].label
 56 |     );
 57 |     videoCamera.selectedIndex = [...videoSelect.options].findIndex(
 58 |         option => option.text === stream.getVideoTracks()[0].label
 59 |     );
 60 |     videoCamera.srcObject = stream;
 61 |     socket.emit("broadcaster");
 62 | }
 63 | 
 64 | function handleError(error) {
 65 |     console.error("Error: ", error);
 66 | }
 67 | 
 68 | 
 69 | class RemoteScreen {
 70 |     constructor({ socket }) {
 71 |         this.socket = socket
 72 |         this.registerSocketEvents(socket)
 73 |     }
 74 | 
 75 |     registerSocketEvents(socket) {
 76 |         socket.on("answer", (id, description) => {
 77 |             peerConnections[id].setRemoteDescription(description);
 78 |         });
 79 | 
 80 |         socket.on("watcher", id => {
 81 |             const peerConnection = new RTCPeerConnection(config);
 82 |             peerConnections[id] = peerConnection;
 83 | 
 84 |             const screenStream = videoScreen.srcObject;
 85 |             const cameraStream = videoCamera.srcObject;
 86 |  
 87 |             screenStream.getTracks()
 88 |                 .forEach(track => peerConnection.addTrack(track, screenStream));
 89 | 
 90 |             cameraStream.getTracks()
 91 |                 .forEach(track => peerConnection.addTrack(track, cameraStream));
 92 | 
 93 | 
 94 |             peerConnection.onicecandidate = event => {
 95 |                 if (event.candidate) {
 96 |                     socket.emit("candidate", id, event.candidate);
 97 |                 }
 98 |             };
 99 | 
100 |             peerConnection
101 |                 .createOffer()
102 |                 .then(sdp => peerConnection.setLocalDescription(sdp))
103 |                 .then(() => {
104 |                     socket.emit("offer", id, peerConnection.localDescription);
105 |                 });
106 |         });
107 | 
108 |         socket.on("candidate", (id, candidate) => {
109 |             peerConnections[id].addIceCandidate(new RTCIceCandidate(candidate));
110 |         });
111 | 
112 |         socket.on("disconnectPeer", id => {
113 |             peerConnections[id].close();
114 |             delete peerConnections[id];
115 |         });
116 | 
117 |         window.onunload = window.onbeforeunload = () => {
118 |             socket.close();
119 |         };
120 |     }
121 |     async handleScreen() {
122 |         const screen = await navigator.mediaDevices.getDisplayMedia()
123 |         this.shareScreen(screen)
124 |     }
125 |     async handleCamera() {
126 |         const str = await getCameraStream()
127 |         const devices = await getDevices(str)
128 |         await gotDevices(devices)
129 |     }
130 |     async  showSources() {
131 | 
132 | 
133 |         await Promise.all([
134 |             this.handleScreen(),
135 |             this.handleCamera()
136 |         ])
137 | 
138 |         this.socket.emit("broadcaster");
139 | 
140 |         audioSelect.onchange = getCameraStream;
141 |         videoSelect.onchange = getCameraStream;
142 |     }
143 | 
144 |     shareScreen(screen) {
145 | 
146 |         if (!screen) {
147 |             console.log('Desktop Capture access rejected.');
148 |             return;
149 |         }
150 |         if (window.stream) {
151 |             window.stream
152 |                 .getTracks()
153 |                 .forEach(track => track.stop());
154 |         }
155 | 
156 |         console.log("Desktop sharing started.. desktop_id:" + screen.id);
157 | 
158 |         try {
159 |             videoScreen.srcObject = screen
160 |             window.stream = screen;
161 | 
162 |             videoScreen.onloadedmetadata = (e) => videoScreen.play()
163 |         } catch (e) {
164 |             console.log('ERROR***', e)
165 |             // System Preferences / Security & Privacy / Camera / Checkbox next to "Chrome"
166 |         }
167 | 
168 |     }
169 | 
170 | }
171 | 


--------------------------------------------------------------------------------
/remote-access-app/client/watcher/app.js:
--------------------------------------------------------------------------------
 1 | let peerConnection;
 2 | const config = {
 3 |     iceServers: [
 4 |         {
 5 |             urls: ["stun:stun.l.google.com:19302"]
 6 |         }
 7 |     ]
 8 | };
 9 | let host = prompt('What is your socket server host?')
10 | if (!host) host = "http://localhost:4000"
11 | 
12 | const socket = io.connect(host);
13 | const camera = document.getElementById('camera')
14 | const video = document.getElementById('screen')
15 | 
16 | socket.on("offer", (id, description) => {
17 |     peerConnection = new RTCPeerConnection(config);
18 |     peerConnection
19 |         .setRemoteDescription(description)
20 |         .then(() => peerConnection.createAnswer())
21 |         .then(sdp => peerConnection.setLocalDescription(sdp))
22 |         .then(() => {
23 |             socket.emit("answer", id, peerConnection.localDescription);
24 |         });
25 | 
26 |     peerConnection.ontrack = event => {
27 |         const item = event.streams[0]
28 |         const isCamera = item.getVideoTracks().length && item.getAudioTracks().length 
29 |         
30 |         if(isCamera) {
31 |             camera.srcObject = item;
32 |             return;
33 |         }
34 | 
35 |         video.srcObject = item; 
36 |     };
37 |     peerConnection.onicecandidate = event => {
38 |         if (event.candidate) {
39 |             socket.emit("candidate", id, event.candidate);
40 |         }
41 |     };
42 | });
43 | 
44 | socket.on("candidate", (id, candidate) => {
45 |     peerConnection
46 |         .addIceCandidate(new RTCIceCandidate(candidate))
47 |         .catch(e => console.error(e));
48 | });
49 | 
50 | socket.on("connect", () => {
51 |     console.log('connected!')
52 |     socket.emit("watcher");
53 | });
54 | 
55 | socket.on("broadcaster", () => {
56 |     console.log('broadcaster!')
57 |     socket.emit("watcher");
58 | });
59 | 
60 | socket.on("disconnectPeer", () => {
61 |     console.log('disconnectPeer!')
62 |     peerConnection.close();
63 | });
64 | 
65 | window.onunload = window.onbeforeunload = () => {
66 |     socket.close();
67 | };
68 | 
69 | 


--------------------------------------------------------------------------------
/remote-access-app/client/watcher/index.html:
--------------------------------------------------------------------------------
 1 | <html>
 2 |   <head>
 3 |     <title>Watcher</title>
 4 |     <link href="./../resources/bootstrap.min.css" rel="stylesheet" />
 5 |     <style>
 6 |       body {
 7 |         background: white;
 8 |         display: -webkit-flex;
 9 |         -webkit-justify-content: center;
10 |         -webkit-align-items: center;
11 |         -webkit-flex-direction: column;
12 |       }
13 |       video {
14 |         width: 800px;
15 |         background: rgba(0, 0, 0, 0.25);
16 | 
17 |         background: white url(../resources/desktop.png) center no-repeat;
18 |         border: 1px solid black;
19 |         box-shadow: 0 1px 1px rgba(0, 0, 0, 0.2);
20 |       }
21 |     </style>
22 |     <script src="../deps/socket.io.slim.js"></script>
23 |   </head>
24 |   <body>
25 |     <div class="row">
26 |       <div class="col">
27 |         <video id="camera" autoplay></video>
28 |       </div>
29 |       <div class="col">
30 |         <video id="screen" autoplay></video>
31 |       </div>
32 |     </div> 
33 | 
34 |     <script src="app.js"></script>
35 |   </body>
36 | </html>
37 | 


--------------------------------------------------------------------------------
/remote-access-app/server/index.html:
--------------------------------------------------------------------------------
 1 | <!DOCTYPE html>
 2 | <html lang="en">
 3 | <head>
 4 |     <meta charset="UTF-8">
 5 |     <meta name="viewport" content="width=device-width, initial-scale=1.0">
 6 |     <title>Hello world1</title>
 7 | </head>
 8 | <body>
 9 |     Hello!
10 | </body>
11 | </html>


--------------------------------------------------------------------------------
/remote-access-app/server/package-lock.json:
--------------------------------------------------------------------------------
   1 | {
   2 |   "name": "server",
   3 |   "version": "1.0.0",
   4 |   "lockfileVersion": 1,
   5 |   "requires": true,
   6 |   "dependencies": {
   7 |     "@sindresorhus/is": {
   8 |       "version": "0.14.0",
   9 |       "resolved": "https://registry.npmjs.org/@sindresorhus/is/-/is-0.14.0.tgz",
  10 |       "integrity": "sha512-9NET910DNaIPngYnLLPeg+Ogzqsi9uM4mSboU5y6p8S5DzMTVEsJZrawi+BoDNUVBa2DhJqQYUFvMDfgU062LQ==",
  11 |       "dev": true
  12 |     },
  13 |     "@szmarczak/http-timer": {
  14 |       "version": "1.1.2",
  15 |       "resolved": "https://registry.npmjs.org/@szmarczak/http-timer/-/http-timer-1.1.2.tgz",
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  17 |       "dev": true,
  18 |       "requires": {
  19 |         "defer-to-connect": "^1.0.1"
  20 |       }
  21 |     },
  22 |     "@types/color-name": {
  23 |       "version": "1.1.1",
  24 |       "resolved": "https://registry.npmjs.org/@types/color-name/-/color-name-1.1.1.tgz",
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  26 |       "dev": true
  27 |     },
  28 |     "abbrev": {
  29 |       "version": "1.1.1",
  30 |       "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz",
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  32 |       "dev": true
  33 |     },
  34 |     "accepts": {
  35 |       "version": "1.3.7",
  36 |       "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
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  38 |       "requires": {
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  40 |         "negotiator": "0.6.2"
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  42 |     },
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  83 |         "color-convert": "^2.0.1"
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  87 |       "version": "3.1.1",
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  91 |       "requires": {
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  93 |         "picomatch": "^2.0.4"
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 100 |     },
 101 |     "async-limiter": {
 102 |       "version": "1.0.1",
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 105 |     },
 106 |     "backo2": {
 107 |       "version": "1.0.2",
 108 |       "resolved": "https://registry.npmjs.org/backo2/-/backo2-1.0.2.tgz",
 109 |       "integrity": "sha1-MasayLEpNjRj41s+u2n038+6eUc="
 110 |     },
 111 |     "balanced-match": {
 112 |       "version": "1.0.0",
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 114 |       "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
 115 |       "dev": true
 116 |     },
 117 |     "base64-arraybuffer": {
 118 |       "version": "0.1.5",
 119 |       "resolved": "https://registry.npmjs.org/base64-arraybuffer/-/base64-arraybuffer-0.1.5.tgz",
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1256 |     "url-parse-lax": {
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1259 |       "integrity": "sha1-FrXK/Afb42dsGxmZF3gj1lA6yww=",
1260 |       "dev": true,
1261 |       "requires": {
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1263 |       }
1264 |     },
1265 |     "widest-line": {
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1272 |       }
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1277 |       "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
1278 |       "dev": true
1279 |     },
1280 |     "write-file-atomic": {
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1282 |       "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-3.0.3.tgz",
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1285 |       "requires": {
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1288 |         "signal-exit": "^3.0.2",
1289 |         "typedarray-to-buffer": "^3.1.5"
1290 |       }
1291 |     },
1292 |     "ws": {
1293 |       "version": "7.3.0",
1294 |       "resolved": "https://registry.npmjs.org/ws/-/ws-7.3.0.tgz",
1295 |       "integrity": "sha512-iFtXzngZVXPGgpTlP1rBqsUK82p9tKqsWRPg5L56egiljujJT3vGAYnHANvFxBieXrTFavhzhxW52jnaWV+w2w=="
1296 |     },
1297 |     "xdg-basedir": {
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1300 |       "integrity": "sha512-PSNhEJDejZYV7h50BohL09Er9VaIefr2LMAf3OEmpCkjOi34eYyQYAXUTjEQtZJTKcF0E2UKTh+osDLsgNim9Q==",
1301 |       "dev": true
1302 |     },
1303 |     "xmlhttprequest-ssl": {
1304 |       "version": "1.5.5",
1305 |       "resolved": "https://registry.npmjs.org/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.5.5.tgz",
1306 |       "integrity": "sha1-wodrBhaKrcQOV9l+gRkayPQ5iz4="
1307 |     },
1308 |     "yeast": {
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1311 |       "integrity": "sha1-AI4G2AlDIMNy28L47XagymyKxBk="
1312 |     }
1313 |   }
1314 | }
1315 | 


--------------------------------------------------------------------------------
/remote-access-app/server/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "server",
 3 |   "version": "1.0.0",
 4 |   "description": "A minimal Electron application",
 5 |   "main": "main.js",
 6 |   "scripts": {
 7 |     "start": "node server.js",
 8 |     "start:old": "nodemon --exec electron ."
 9 |   },
10 |   "repository": "https://github.com/electron/electron-quick-start",
11 |   "keywords": [
12 |     "Electron",
13 |     "quick",
14 |     "start",
15 |     "tutorial",
16 |     "demo"
17 |   ],
18 |   "author": "Erick Wendel",
19 |   "license": "CC0-1.0",
20 |   "devDependencies": {
21 |     "nodemon": "^2.0.3"
22 |   },
23 |   "dependencies": {
24 |     "socket.io": "^2.3.0"
25 |   }
26 | }
27 | 


--------------------------------------------------------------------------------
/remote-access-app/server/server.js:
--------------------------------------------------------------------------------
 1 | const { promises: { readFile } } = require('fs');
 2 | 
 3 | const server = require('http').createServer(handler)
 4 | const io = require('socket.io')(server); 
 5 | 
 6 | 
 7 | let broadcaster
 8 | const port = process.env.PORT || 4000
 9 | 
10 | async function handler(req, res) {
11 |     const data = await readFile(__dirname + '/index.html')
12 |     res.writeHead(200);
13 |     res.end(data);
14 | }
15 | 
16 | 
17 | io.sockets.on("error", e => console.log(e));
18 | io.sockets.on("connection", socket => {
19 |     console.log('connection received!', socket.id)
20 | 
21 |     socket.on("broadcaster", () => {
22 |         broadcaster = socket.id;
23 |         socket.broadcast.emit("broadcaster");
24 |     });
25 |     socket.on("watcher", () => {
26 |         socket.to(broadcaster).emit("watcher", socket.id);
27 |     });
28 |     socket.on("offer", (id, message) => {
29 |         console.log('offer', message)
30 |         socket.to(id).emit("offer", socket.id, message);
31 |     });
32 |     socket.on("answer", (id, message) => {
33 |         console.log('answer', message)
34 |         socket.to(id).emit("answer", socket.id, message);
35 |     });
36 |     socket.on("candidate", (id, message) => {
37 |         console.log('candidate', message)
38 |         socket.to(id).emit("candidate", socket.id, message);
39 |     });
40 |     socket.on("disconnect", () => {
41 |         socket.to(broadcaster).emit("disconnectPeer", socket.id);
42 |     });
43 | 
44 |    
45 | });
46 | 
47 | server.listen(port, () => console.log(`Server is running on port ${port}`));
48 | 
49 | 
50 | //Move the mouse down by 100 pixels.
51 | // setInterval(() => {
52 | 
53 | //     const mouse = robot.getMousePos();
54 | //     console.log("Mouse is at x:" + mouse.x + " y:" + mouse.y);
55 | //     // robot.moveMouse(mouse.x, mouse.y + 100);
56 | // }, 1000);
57 | 
58 | //Left click!
59 | // robot.mouseClick();


--------------------------------------------------------------------------------