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uci-socket
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replaced stream processing with more robust processing using buffer length using new JsonStream class

tls
David Kebler 2018-01-21 19:55:47 -08:00
parent 9d6a562cda
commit 1fe0d71e0e
7 changed files with 168 additions and 136 deletions
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20
package-lock.json generated
View File

@ -730,11 +730,6 @@
"integrity": "sha1-3zrhmayt+31ECqrgsp4icrJOxhk=",
"dev": true
},
"delimiter-stream": {
"version": "1.0.1",
"resolved": "http://trantor:8082/delimiter-stream/-/delimiter-stream-1.0.1.tgz",
"integrity": "sha1-XyUUUJNQcjq5lE2shvzYJ39TFBg="
},
"diff": {
"version": "3.3.1",
"resolved": "http://trantor:8082/diff/-/diff-3.3.1.tgz",
@ -2899,7 +2894,8 @@
"lodash": {
"version": "4.17.4",
"resolved": "http://trantor:8082/lodash/-/lodash-4.17.4.tgz",
"integrity": "sha1-eCA6TRwyiuHYbcpkYONptX9AVa4="
"integrity": "sha1-eCA6TRwyiuHYbcpkYONptX9AVa4=",
"dev": true
},
"longest": {
"version": "1.0.1",
@ -3044,7 +3040,8 @@
"moment": {
"version": "2.20.1",
"resolved": "http://trantor:8082/moment/-/moment-2.20.1.tgz",
"integrity": "sha512-Yh9y73JRljxW5QxN08Fner68eFLxM5ynNOAw2LbIB1YAGeQzZT8QFSUvkAz609Zf+IHhhaUxqZK8dG3W/+HEvg=="
"integrity": "sha512-Yh9y73JRljxW5QxN08Fner68eFLxM5ynNOAw2LbIB1YAGeQzZT8QFSUvkAz609Zf+IHhhaUxqZK8dG3W/+HEvg==",
"optional": true
},
"ms": {
"version": "2.0.0",
@ -3728,15 +3725,6 @@
"integrity": "sha1-tf3AjxKH6hF4Yo5BXiUTK3NkbG0=",
"dev": true
},
"simple-node-logger": {
"version": "0.93.33",
"resolved": "http://trantor:8082/simple-node-logger/-/simple-node-logger-0.93.33.tgz",
"integrity": "sha512-ppFuaDeacR1Vu+cP17kwOWQsx5C1vbIRa54qm5WgZBzQ5eBue/GWsDd4sr++ITnWZIoIOvjx5kEm5AhP7IqU+Q==",
"requires": {
"lodash": "4.17.4",
"moment": "2.20.1"
}
},
"slice-ansi": {
"version": "0.0.4",
"resolved": "http://trantor:8082/slice-ansi/-/slice-ansi-0.0.4.tgz",

4
package.json
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@ -42,8 +42,6 @@
"dependencies": {
"better-try-catch": "^0.6.2",
"bunyan": "^1.8.12",
"death": "^1.1.0",
"delimiter-stream": "^1.0.1",
"simple-node-logger": "^0.93.33"
"death": "^1.1.0"
}
}

5
readme.md
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@ -1 +1,4 @@
## Various Communication Protocol/Transport Testing
## Extensons of Nodejs net 'Socket` and `Server` classes
Sockets now pass JSON objects (message packets)
Allows extension or passing of custom packet processors (e.g. MQTT) at each end of the socket.

96
src/consumer.mjs
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@ -1,7 +1,8 @@
import { Socket } from 'net'
import btc from 'better-try-catch'
import bunyan from 'bunyan'
import Stream from 'delimiter-stream'
// import Stream from 'delimiter-stream'
import JsonStream from './json'
export default class Consumer extends Socket {
constructor (path, opts={}) {
@ -15,24 +16,40 @@ export default class Consumer extends Socket {
this._pp = opts.packetProcessor || 'processPacket'
this.keepAlive = opts.keepAlive ? opts.keepAlive : true
this._ready = false
this.timeout = opts.timeout || 1000
this.wait = opts.wait || 20
this.timeout = opts.timeout || 500
this.wait = opts.wait || 5
// logging
this.log_file=opts.log_file || './socket.log'
this.log_opts = {streams:[]}
this.log_opts.name = opts.name ? opts.name : 'uci-unix-socket-consumer'
this.log_opts.streams.push({level: 'info',path: this.log_file })
this.log_opts.name = opts.name ? opts.name : 'uci-socket-consumer'
// this.log_opts.streams.push({level: 'info',path: this.log_file })
if (opts.log) this.log_opts.streams.push({level: 'info',stream: process.stdout})
this.log = bunyan.createLogger(this.log_opts)
// bind to class for other class functions
this.connect = this.connect.bind(this)
this.ready = this.ready.bind(this)
}
ready() {return this._ready}
async connect (app) {
if (app) Object.assign(this, app)
this.listen()
async connect (app={}) {
this.stream = new JsonStream()
// first set the packet process
this._pp = app.pp || this._pp
this.pp = this.pp || this._pp
if (Object.keys(app).length === 0) app = this
// set a default processor if none provided
if (!app[this.pp]) {
this.pp = 'processPacket' // reset in case alt function is missing
app.processPacket = async (packet) => {
console.log('packet from socket')
console.dir(packet)
return packet }
}
this.listen(app)
this.log.info('listening')
return new Promise( (resolve,reject) => {
@ -47,73 +64,34 @@ export default class Consumer extends Socket {
super.connect({ port:this.port, host:this.host, path: this.path }, async () => {
this.log.info({path:this.path},'connecting')
this.setKeepAlive(this.keepAlive)
let [err, res] = await btc(isReady).bind(this)(this.ready.bind(this), this.wait, this.timeout)
let [err, res] = await btc(isReady).bind(this)(this.ready, this.wait, this.timeout)
if (err) reject(err)
this.log.info('handshake done, connected')
resolve(res)
})
// catch (err){
// console.log('===============',err)
// resolve('ready')
// }
// if (err) {
// console.log('===============',err)
// if (err.code === 'EISCONN') resolve('ready')
// else reject(err)
// }
}) //end promise
}
async send(packet) {
let [err, strbuf] = btc(JSON.stringify)(packet)
if (!err) {
this.log.info({packet:packet},'attempting to send packet to socket')
strbuf += '\n'
return new Promise((resolve, reject) => {
super.write(strbuf, (err) => {
if (err) reject(err)
else resolve('complete')
})
})
}
else { this.log.info({packet:packet}, 'bad packet JSON syntax')}
await this.write(this.stream.serialize(packet))
// throw new Error('Cannot send connection not ready')
}
async listen () {
async listen (app) {
let packet = new Stream()
this.on('data', this.stream.onData)
this.on('data', (chunk) => {
packet.write(chunk)
})
this.stream.on('message', messageProcess.bind(this))
packet.on('data', (strJSON) => {
let [err, packet] = btc(JSON.parse)(strJSON)
if (!err) {
async function messageProcess (packet) {
// console.log('incoming packet from server', packet)
if (packet.ready) {
this._ready = true
return }
// set packet processing
this.pp = this.pp || this._pp
// if no processor provided use this console logger one
if (!this[this.pp]) {
this.pp = 'processPacket'
this.processPacket = async (packet) => {
this.log.info({packet:packet},'process with default logger')
console.log('packet from socket')
console.dir(packet)
return packet }
await app[app.pp].bind(app)(packet)
}
this[this.pp].bind(this)(packet) // process the packet
}
else { this.log.info({strJSON: strJSON},'bad packet JSON syntax')}
})
}
} // end class
@ -124,10 +102,10 @@ function isReady(ready, wait=30, timeout=1000) {
let time = 0
return new Promise((resolve, reject) => {
(function waitReady(){
if (time > timeout) return reject('timeout trying to connect')
if (time > timeout) return reject(`timeout trying to connect after ${timeout}ms`)
if (ready()) return resolve('ready')
log.info('waiting for 30ms for handshake')
time += 30
log.info(`waiting ${wait}ms for handshake`)
time += wait
setTimeout(waitReady, wait)
})()
})

78
src/json.mjs Normal file
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@ -0,0 +1,78 @@
import {StringDecoder} from 'string_decoder'
import EventEmitter from 'events'
const decoder = new StringDecoder()
export default class JsonStream extends EventEmitter{
constructor(opts={}){
super()
this._contentLength = null
this._buffer = ''
this._delimeter = opts.delimiter || '#'
this.onData = this.onData.bind(this)
}
onData (data) {
data = decoder.write(data)
try {
this._handleData(data)
} catch (e) {
this.emit('error', { error: e })
}
}
serialize(message) {
var messageData = JSON.stringify(message)
var length = Buffer.byteLength(messageData, 'utf8')
var data = length + this._delimeter + messageData
return data
}
_handleData (data) {
this._buffer += data
if (this._contentLength == null) {
var i = this._buffer.indexOf(this._delimeter)
//Check if the buffer has a this._opts.delimeter or "#", if not, the end of the buffer string might be in the middle of a content length string
if (i !== -1) {
var rawContentLength = this._buffer.substring(0, i)
this._contentLength = parseInt(rawContentLength)
if (isNaN(this._contentLength)) {
this._contentLength = null
this._buffer = ''
var err = new Error('Invalid content length supplied ('+rawContentLength+') in: '+this._buffer)
err.code = 'E_INVALID_CONTENT_LENGTH'
throw err
}
this._buffer = this._buffer.substring(i+1)
}
}
if (this._contentLength != null) {
var length = Buffer.byteLength(this._buffer, 'utf8')
if (length == this._contentLength) {
this._handleMessage(this._buffer)
} else if (length > this._contentLength) {
var message = this._buffer.substring(0, this._contentLength)
var rest = this._buffer.substring(this._contentLength)
this._handleMessage(message)
this.onData(rest)
}
}
}
_handleMessage (data) {
this._contentLength = null
this._buffer = ''
var message
try {
message = JSON.parse(data)
} catch (e) {
var err = new Error('Could not parse JSON: '+e.message+'\nRequest data: '+data)
err.code = 'E_INVALID_JSON'
throw err
}
message = message || {}
this.emit('message', message)
}
}

75
src/socket.mjs
View File

@ -3,7 +3,8 @@ import { unlink as fileDelete } from 'fs'
import btc from 'better-try-catch'
import ON_DEATH from 'death' //this is intentionally ugly
import bunyan from 'bunyan'
import Stream from 'delimiter-stream'
// import Stream from 'delimiter-stream'
import JsonStream from './json'
export default class Socket extends Server {
constructor (path, opts={}) {
@ -17,15 +18,27 @@ export default class Socket extends Server {
// logging
this.log_file=opts.log_file || './socket.log'
this.log_opts = {streams:[]}
this.log_opts.name = opts.name ? opts.name : 'uci-unix-socket-consumer'
this.log_opts.streams.push({level: 'info',path: this.log_file })
this.log_opts.name = opts.name ? opts.name : 'uci-socket'
// this.log_opts.streams.push({level: 'info',path: this.log_file })
if (opts.log) this.log_opts.streams.push({level: 'info',stream: process.stdout})
this.log = bunyan.createLogger(this.log_opts)
//binding
} // end constructor
async create (app={}) {
async create () {
// first set the packet process
this._pp = app.pp || this._pp
this.pp = this.pp || this._pp
if (Object.keys(app).length === 0) app = this
// set a default processor if none provided
if (!app[this.pp]) {
this.pp = 'processPacket' // reset in case alt function is missing
app.processPacket = async (packet) => {
packet.res='echoed'
return packet }
}
return new Promise( async (resolve,reject) => {
@ -47,7 +60,7 @@ export default class Socket extends Server {
if (path) { // if TCP socket should already be dead
this.log.info({socket: path}, 'already exists...deleting')
await fileDelete(path)
return await this.listen.bind(this)(this.listen_opts)
return await this.listen.bind(this)(this.listen_opts,app)
}
}
// otherwise fatally exit
@ -55,15 +68,14 @@ export default class Socket extends Server {
reject(err)
})
let [err, res] = await btc(this.listen.bind(this))(this.listen_opts)
let [err, res] = await btc(this.listen.bind(this))(this.listen_opts,app)
if (err) reject(err)
resolve(res)
}) // end promise
} // end create
async listen (opts) {
async listen (opts,app) {
super.listen(opts, async (err, res) => {
@ -71,45 +83,19 @@ export default class Socket extends Server {
// this gets called for each client connection and is unique to each
this.on('connection', (socket) => {
this.log.info('server: new consumer connecting')
let packet = new Stream()
const stream = new JsonStream()
socket.on('data', async (chunk) => {
packet.write(chunk)
this.log.info('new consumer connecting sending handshake')
socket.write(stream.serialize({ready:true}))
socket.on('data', stream.onData)
stream.on('message', async function (packet) {
// console.log('incoming packet from consumer',packet)
socket.write(stream.serialize(await app[app.pp].bind(app)(packet)))
})
// when a complete JSON packet arrives process the packet
packet.on('data', async (strJSON) => {
let [err, packet] = btc(JSON.parse)(strJSON)
if (!err) {
this.log.info({packet:packet},'Server: packet received to socket')
// set default packet processing
this.pp = this.pp || this._pp
// console.log('==========',app.spp,'====',this.spp)
if (!this[this.pp]) {
this.processPacket = async (packet) => {
packet.res='echoed'
this.log.info({packet:packet},'packet being sent to consumer')
return packet }
}
socket.write(JSON.stringify(await this[this.pp].bind(this)(packet))+'\n' )
}
else {
this.log.info(`bad packet JSON syntax \n ${strJSON}`)
let error = {
error: 'bad packet JSON syntax sent',
packet: strJSON
}
socket.write(JSON.stringify(error))
}
}) // end incoming string stream listerner
this.log.info('Server: sending handshake to consumer')
socket.write('{"ready":true}\n')
}) // end connected consumer
this.log.info({socket: this.listen_opts},'socket created')
@ -118,6 +104,7 @@ export default class Socket extends Server {
}
async destroy () {
this.log.info('closing down socket')

18
test/socket.test.mjs
View File

@ -61,7 +61,6 @@ describe('Connects and Processes a payload in a JSON packet', function(){
if (this.times<10) return
try {
// expect(packet.payload).to.equal('unix payload')
expect(packet.payload).to.equal('unix payload')
resolve()
}
@ -92,11 +91,11 @@ describe('Connects and Processes a payload in a JSON packet', function(){
uconsumer.processPacket = function (packet) {
this.times++
// console.log(this.times,packet.payload)
if (this.times<10) return
try {
// expect(packet.payload).to.equal('unix payload')
expect(packet.payload).to.equal('unix payload')
expect(packet.payload).to.equal('consumer 1 unix payload')
resolve()
}
catch(error) {
@ -105,16 +104,17 @@ describe('Connects and Processes a payload in a JSON packet', function(){
}
uconsumer2.processPacket = function (packet) {
// console.log('processor2', packet.payload)
return packet
}
let [err] = await btc(uconsumer2.connect)()
console.log('connect error', err)
let packet = {payload:'unix payload'}
if (err) reject(err)
let packet1 = {payload:'consumer 1 unix payload'}
let packet2 = {payload:'consumer2 unix payload'}
for (var i = 0; i < 11; i++) {
uconsumer.send(packet)
uconsumer2.send(packet)
uconsumer.send(packet1)
uconsumer2.send(packet2)
}
}) //end promise
@ -169,4 +169,4 @@ describe('Connects and Processes a payload in a JSON packet', function(){
}) // end tcp socket 2 test
})
}) // end describe