You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
328 lines
8.2 KiB
328 lines
8.2 KiB
var capability = require('./capability')
|
|
var inherits = require('inherits')
|
|
var response = require('./response')
|
|
var stream = require('readable-stream')
|
|
var toArrayBuffer = require('to-arraybuffer')
|
|
|
|
var IncomingMessage = response.IncomingMessage
|
|
var rStates = response.readyStates
|
|
|
|
function decideMode (preferBinary, useFetch) {
|
|
if (capability.fetch && useFetch) {
|
|
return 'fetch'
|
|
} else if (capability.mozchunkedarraybuffer) {
|
|
return 'moz-chunked-arraybuffer'
|
|
} else if (capability.msstream) {
|
|
return 'ms-stream'
|
|
} else if (capability.arraybuffer && preferBinary) {
|
|
return 'arraybuffer'
|
|
} else if (capability.vbArray && preferBinary) {
|
|
return 'text:vbarray'
|
|
} else {
|
|
return 'text'
|
|
}
|
|
}
|
|
|
|
var ClientRequest = module.exports = function (opts) {
|
|
var self = this
|
|
stream.Writable.call(self)
|
|
|
|
self._opts = opts
|
|
self._body = []
|
|
self._headers = {}
|
|
if (opts.auth)
|
|
self.setHeader('Authorization', 'Basic ' + new Buffer(opts.auth).toString('base64'))
|
|
Object.keys(opts.headers).forEach(function (name) {
|
|
self.setHeader(name, opts.headers[name])
|
|
})
|
|
|
|
var preferBinary
|
|
var useFetch = true
|
|
if (opts.mode === 'disable-fetch' || ('requestTimeout' in opts && !capability.abortController)) {
|
|
// If the use of XHR should be preferred. Not typically needed.
|
|
useFetch = false
|
|
preferBinary = true
|
|
} else if (opts.mode === 'prefer-streaming') {
|
|
// If streaming is a high priority but binary compatibility and
|
|
// the accuracy of the 'content-type' header aren't
|
|
preferBinary = false
|
|
} else if (opts.mode === 'allow-wrong-content-type') {
|
|
// If streaming is more important than preserving the 'content-type' header
|
|
preferBinary = !capability.overrideMimeType
|
|
} else if (!opts.mode || opts.mode === 'default' || opts.mode === 'prefer-fast') {
|
|
// Use binary if text streaming may corrupt data or the content-type header, or for speed
|
|
preferBinary = true
|
|
} else {
|
|
throw new Error('Invalid value for opts.mode')
|
|
}
|
|
self._mode = decideMode(preferBinary, useFetch)
|
|
self._fetchTimer = null
|
|
|
|
self.on('finish', function () {
|
|
self._onFinish()
|
|
})
|
|
}
|
|
|
|
inherits(ClientRequest, stream.Writable)
|
|
|
|
ClientRequest.prototype.setHeader = function (name, value) {
|
|
var self = this
|
|
var lowerName = name.toLowerCase()
|
|
// This check is not necessary, but it prevents warnings from browsers about setting unsafe
|
|
// headers. To be honest I'm not entirely sure hiding these warnings is a good thing, but
|
|
// http-browserify did it, so I will too.
|
|
if (unsafeHeaders.indexOf(lowerName) !== -1)
|
|
return
|
|
|
|
self._headers[lowerName] = {
|
|
name: name,
|
|
value: value
|
|
}
|
|
}
|
|
|
|
ClientRequest.prototype.getHeader = function (name) {
|
|
var header = this._headers[name.toLowerCase()]
|
|
if (header)
|
|
return header.value
|
|
return null
|
|
}
|
|
|
|
ClientRequest.prototype.removeHeader = function (name) {
|
|
var self = this
|
|
delete self._headers[name.toLowerCase()]
|
|
}
|
|
|
|
ClientRequest.prototype._onFinish = function () {
|
|
var self = this
|
|
|
|
if (self._destroyed)
|
|
return
|
|
var opts = self._opts
|
|
|
|
var headersObj = self._headers
|
|
var body = null
|
|
if (opts.method !== 'GET' && opts.method !== 'HEAD') {
|
|
if (capability.arraybuffer) {
|
|
body = toArrayBuffer(Buffer.concat(self._body))
|
|
} else if (capability.blobConstructor) {
|
|
body = new global.Blob(self._body.map(function (buffer) {
|
|
return toArrayBuffer(buffer)
|
|
}), {
|
|
type: (headersObj['content-type'] || {}).value || ''
|
|
})
|
|
} else {
|
|
// get utf8 string
|
|
body = Buffer.concat(self._body).toString()
|
|
}
|
|
}
|
|
|
|
// create flattened list of headers
|
|
var headersList = []
|
|
Object.keys(headersObj).forEach(function (keyName) {
|
|
var name = headersObj[keyName].name
|
|
var value = headersObj[keyName].value
|
|
if (Array.isArray(value)) {
|
|
value.forEach(function (v) {
|
|
headersList.push([name, v])
|
|
})
|
|
} else {
|
|
headersList.push([name, value])
|
|
}
|
|
})
|
|
|
|
if (self._mode === 'fetch') {
|
|
var signal = null
|
|
var fetchTimer = null
|
|
if (capability.abortController) {
|
|
var controller = new AbortController()
|
|
signal = controller.signal
|
|
self._fetchAbortController = controller
|
|
|
|
if ('requestTimeout' in opts && opts.requestTimeout !== 0) {
|
|
self._fetchTimer = global.setTimeout(function () {
|
|
self.emit('requestTimeout')
|
|
if (self._fetchAbortController)
|
|
self._fetchAbortController.abort()
|
|
}, opts.requestTimeout)
|
|
}
|
|
}
|
|
|
|
global.fetch(self._opts.url, {
|
|
method: self._opts.method,
|
|
headers: headersList,
|
|
body: body || undefined,
|
|
mode: 'cors',
|
|
credentials: opts.withCredentials ? 'include' : 'same-origin',
|
|
signal: signal
|
|
}).then(function (response) {
|
|
self._fetchResponse = response
|
|
self._connect()
|
|
}, function (reason) {
|
|
global.clearTimeout(self._fetchTimer)
|
|
if (!self._destroyed)
|
|
self.emit('error', reason)
|
|
})
|
|
} else {
|
|
var xhr = self._xhr = new global.XMLHttpRequest()
|
|
try {
|
|
xhr.open(self._opts.method, self._opts.url, true)
|
|
} catch (err) {
|
|
process.nextTick(function () {
|
|
self.emit('error', err)
|
|
})
|
|
return
|
|
}
|
|
|
|
// Can't set responseType on really old browsers
|
|
if ('responseType' in xhr)
|
|
xhr.responseType = self._mode.split(':')[0]
|
|
|
|
if ('withCredentials' in xhr)
|
|
xhr.withCredentials = !!opts.withCredentials
|
|
|
|
if (self._mode === 'text' && 'overrideMimeType' in xhr)
|
|
xhr.overrideMimeType('text/plain; charset=x-user-defined')
|
|
|
|
if ('requestTimeout' in opts) {
|
|
xhr.timeout = opts.requestTimeout
|
|
xhr.ontimeout = function () {
|
|
self.emit('requestTimeout')
|
|
}
|
|
}
|
|
|
|
headersList.forEach(function (header) {
|
|
xhr.setRequestHeader(header[0], header[1])
|
|
})
|
|
|
|
self._response = null
|
|
xhr.onreadystatechange = function () {
|
|
switch (xhr.readyState) {
|
|
case rStates.LOADING:
|
|
case rStates.DONE:
|
|
self._onXHRProgress()
|
|
break
|
|
}
|
|
}
|
|
// Necessary for streaming in Firefox, since xhr.response is ONLY defined
|
|
// in onprogress, not in onreadystatechange with xhr.readyState = 3
|
|
if (self._mode === 'moz-chunked-arraybuffer') {
|
|
xhr.onprogress = function () {
|
|
self._onXHRProgress()
|
|
}
|
|
}
|
|
|
|
xhr.onerror = function () {
|
|
if (self._destroyed)
|
|
return
|
|
self.emit('error', new Error('XHR error'))
|
|
}
|
|
|
|
try {
|
|
xhr.send(body)
|
|
} catch (err) {
|
|
process.nextTick(function () {
|
|
self.emit('error', err)
|
|
})
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Checks if xhr.status is readable and non-zero, indicating no error.
|
|
* Even though the spec says it should be available in readyState 3,
|
|
* accessing it throws an exception in IE8
|
|
*/
|
|
function statusValid (xhr) {
|
|
try {
|
|
var status = xhr.status
|
|
return (status !== null && status !== 0)
|
|
} catch (e) {
|
|
return false
|
|
}
|
|
}
|
|
|
|
ClientRequest.prototype._onXHRProgress = function () {
|
|
var self = this
|
|
|
|
if (!statusValid(self._xhr) || self._destroyed)
|
|
return
|
|
|
|
if (!self._response)
|
|
self._connect()
|
|
|
|
self._response._onXHRProgress()
|
|
}
|
|
|
|
ClientRequest.prototype._connect = function () {
|
|
var self = this
|
|
|
|
if (self._destroyed)
|
|
return
|
|
|
|
self._response = new IncomingMessage(self._xhr, self._fetchResponse, self._mode, self._fetchTimer)
|
|
self._response.on('error', function(err) {
|
|
self.emit('error', err)
|
|
})
|
|
|
|
self.emit('response', self._response)
|
|
}
|
|
|
|
ClientRequest.prototype._write = function (chunk, encoding, cb) {
|
|
var self = this
|
|
|
|
self._body.push(chunk)
|
|
cb()
|
|
}
|
|
|
|
ClientRequest.prototype.abort = ClientRequest.prototype.destroy = function () {
|
|
var self = this
|
|
self._destroyed = true
|
|
global.clearTimeout(self._fetchTimer)
|
|
if (self._response)
|
|
self._response._destroyed = true
|
|
if (self._xhr)
|
|
self._xhr.abort()
|
|
else if (self._fetchAbortController)
|
|
self._fetchAbortController.abort()
|
|
}
|
|
|
|
ClientRequest.prototype.end = function (data, encoding, cb) {
|
|
var self = this
|
|
if (typeof data === 'function') {
|
|
cb = data
|
|
data = undefined
|
|
}
|
|
|
|
stream.Writable.prototype.end.call(self, data, encoding, cb)
|
|
}
|
|
|
|
ClientRequest.prototype.flushHeaders = function () {}
|
|
ClientRequest.prototype.setTimeout = function () {}
|
|
ClientRequest.prototype.setNoDelay = function () {}
|
|
ClientRequest.prototype.setSocketKeepAlive = function () {}
|
|
|
|
// Taken from http://www.w3.org/TR/XMLHttpRequest/#the-setrequestheader%28%29-method
|
|
var unsafeHeaders = [
|
|
'accept-charset',
|
|
'accept-encoding',
|
|
'access-control-request-headers',
|
|
'access-control-request-method',
|
|
'connection',
|
|
'content-length',
|
|
'cookie',
|
|
'cookie2',
|
|
'date',
|
|
'dnt',
|
|
'expect',
|
|
'host',
|
|
'keep-alive',
|
|
'origin',
|
|
'referer',
|
|
'te',
|
|
'trailer',
|
|
'transfer-encoding',
|
|
'upgrade',
|
|
'user-agent',
|
|
'via'
|
|
]
|