320 lines
8.1 KiB
JavaScript
320 lines
8.1 KiB
JavaScript
'use strict'
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const url = require('url')
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const {EventEmitter} = require('events')
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const util = require('util')
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const Readable = require('stream').Readable
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const binding = process.atomBinding('net')
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const {net, Net} = binding
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const {URLRequest} = net
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Object.setPrototypeOf(Net.prototype, EventEmitter.prototype)
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Object.setPrototypeOf(URLRequest.prototype, EventEmitter.prototype)
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let kSupportedProtocols = new Set()
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kSupportedProtocols.add('http:')
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kSupportedProtocols.add('https:')
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class IncomingMessage extends Readable {
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constructor (urlRequest) {
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super()
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this._url_request = urlRequest
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this._shouldPush = false;
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this._data = [];
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this._url_request.on('data', (event, chunk) => {
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this._storeInternalData(chunk)
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this._pushInternalData()
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})
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this._url_request.on('end', () => {
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this._storeInternalData(null)
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this._pushInternalData()
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})
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}
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get statusCode () {
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return this._url_request.statusCode
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}
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get statusMessage () {
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return this._url_request.statusMessage
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}
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get headers () {
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return this._url_request.rawResponseHeaders
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}
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get httpVersion () {
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return `${this.httpVersionMajor}.${this.httpVersionMinor}`
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}
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get httpVersionMajor () {
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return this._url_request.httpVersionMajor
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}
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get httpVersionMinor () {
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return this._url_request.httpVersionMinor
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}
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get rawHeaders () {
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return this._url_request.rawResponseHeaders
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}
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_storeInternalData(chunk) {
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this._data.push(chunk)
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}
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_pushInternalData() {
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while (this._shouldPush && this._data.length > 0) {
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const chunk = this._data.shift()
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this._shouldPush = this.push(chunk)
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}
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}
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_read() {
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this._shouldPush = true
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this._pushInternalData()
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}
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}
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URLRequest.prototype._emitRequestEvent = function (async, ...rest) {
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if (async) {
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process.nextTick(() => {
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this._request.emit.apply(this._request, rest)
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})
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} else {
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this._request.emit.apply(this._request, rest)
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}
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}
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URLRequest.prototype._emitResponseEvent = function (async, ...rest) {
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if (async) {
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process.nextTick(() => {
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this._request.emit.apply(this._request, rest)
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})
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} else {
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this._response.emit.apply(this._response, rest)
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}
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}
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class ClientRequest extends EventEmitter {
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constructor (options, callback) {
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super()
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if (typeof options === 'string') {
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options = url.parse(options)
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} else {
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options = util._extend({}, options)
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}
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const method = (options.method || 'GET').toUpperCase()
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let urlStr = options.url
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if (!urlStr) {
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let urlObj = {}
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const protocol = options.protocol || 'http'
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if (!kSupportedProtocols.has(protocol)) {
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throw new Error('Protocol "' + protocol + '" not supported. ')
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}
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urlObj.protocol = protocol
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if (options.host) {
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urlObj.host = options.host
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} else {
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if (options.hostname) {
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urlObj.hostname = options.hostname
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} else {
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urlObj.hostname = 'localhost'
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}
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if (options.port) {
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urlObj.port = options.port
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}
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}
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const path = options.path || '/'
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if (options.path && / /.test(options.path)) {
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// The actual regex is more like /[^A-Za-z0-9\-._~!$&'()*+,;=/:@]/
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// with an additional rule for ignoring percentage-escaped characters
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// but that's a) hard to capture in a regular expression that performs
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// well, and b) possibly too restrictive for real-world usage. That's
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// why it only scans for spaces because those are guaranteed to create
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// an invalid request.
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throw new TypeError('Request path contains unescaped characters.')
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}
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urlObj.path = path
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urlStr = url.format(urlObj)
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}
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const sessionName = options.session || ''
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let urlRequest = new URLRequest({
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method: method,
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url: urlStr,
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session: sessionName
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})
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// Set back and forward links.
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this._url_request = urlRequest
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urlRequest._request = this
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if (options.headers) {
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const keys = Object.keys(options.headers)
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for (let i = 0, l = keys.length; i < l; i++) {
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const key = keys[i]
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this.setHeader(key, options.headers[key])
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}
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}
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// Set when the request uses chunked encoding. Can be switched
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// to true only once and never set back to false.
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this._chunkedEncoding = false
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// This is a copy of the extra headers structure held by the native
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// net::URLRequest. The main reason is to keep the getHeader API synchronous
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// after the request starts.
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this._extra_headers = {}
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urlRequest.on('response', () => {
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const response = new IncomingMessage(urlRequest)
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urlRequest._response = response
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this.emit('response', response)
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})
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if (callback) {
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this.once('response', callback)
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}
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}
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get chunkedEncoding () {
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return this._chunkedEncoding
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}
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set chunkedEncoding (value) {
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if (!this._url_request.notStarted) {
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throw new Error('Can\'t set the transfer encoding, headers have been sent.')
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}
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this._chunkedEncoding = value
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}
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setHeader (name, value) {
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if (typeof name !== 'string') {
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throw new TypeError('`name` should be a string in setHeader(name, value).')
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}
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if (value === undefined) {
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throw new Error('`value` required in setHeader("' + name + '", value).')
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}
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if (!this._url_request.notStarted) {
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throw new Error('Can\'t set headers after they are sent.')
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}
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const key = name.toLowerCase()
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this._extra_headers[key] = value
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this._url_request.setExtraHeader(name, value)
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}
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getHeader (name) {
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if (arguments.length < 1) {
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throw new Error('`name` is required for getHeader(name).')
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}
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if (!this._extra_headers) {
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return
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}
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const key = name.toLowerCase()
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return this._extra_headers[key]
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}
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removeHeader (name) {
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if (arguments.length < 1) {
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throw new Error('`name` is required for removeHeader(name).')
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}
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if (!this._url_request.notStarted) {
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throw new Error('Can\'t remove headers after they are sent.')
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}
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const key = name.toLowerCase()
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delete this._extra_headers[key]
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this._url_request.removeExtraHeader(name)
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}
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_write (chunk, encoding, callback, isLast) {
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let chunkIsString = typeof chunk === 'string'
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let chunkIsBuffer = chunk instanceof Buffer
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if (!chunkIsString && !chunkIsBuffer) {
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throw new TypeError('First argument must be a string or Buffer.')
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}
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if (chunkIsString) {
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// We convert all strings into binary buffers.
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chunk = Buffer.from(chunk, encoding)
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}
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// Headers are assumed to be sent on first call to _writeBuffer,
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// i.e. after the first call to write or end.
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let result = this._url_request.write(chunk, isLast)
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// Since writing to the network is asynchronous, we conservatively
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// assume that request headers are written after delivering the first
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// buffer to the network IO thread.
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if (!this._url_request.notStarted) {
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this._url_request.setChunkedUpload(this.chunkedEncoding)
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}
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// The write callback is fired asynchronously to mimic Node.js.
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if (callback) {
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process.nextTick(callback)
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}
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return result
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}
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write (data, encoding, callback) {
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if (this._url_request.finished) {
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let error = new Error('Write after end.')
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process.nextTick(writeAfterEndNT, this, error, callback)
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return true
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}
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return this._write(data, encoding, callback, false)
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}
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end (data, encoding, callback) {
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if (this._url_request.finished) {
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return false
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}
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if (typeof data === 'function') {
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callback = data
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encoding = null
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data = null
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} else if (typeof encoding === 'function') {
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callback = encoding
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encoding = null
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}
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data = data || ''
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return this._write(data, encoding, callback, true)
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}
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abort () {
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this._url_request.cancel()
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}
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}
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function writeAfterEndNT (self, error, callback) {
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self.emit('error', error)
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if (callback) callback(error)
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}
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Net.prototype.request = function (options, callback) {
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return new ClientRequest(options, callback)
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}
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net.ClientRequest = ClientRequest
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module.exports = net
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