462 lines
12 KiB
JavaScript
462 lines
12 KiB
JavaScript
(function(self) {
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'use strict';
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if (self.fetch) {
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return
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}
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var support = {
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searchParams: 'URLSearchParams' in self,
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iterable: 'Symbol' in self && 'iterator' in Symbol,
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blob: 'FileReader' in self && 'Blob' in self && (function() {
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try {
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new Blob()
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return true
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} catch(e) {
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return false
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}
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})(),
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formData: 'FormData' in self,
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arrayBuffer: 'ArrayBuffer' in self
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}
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if (support.arrayBuffer) {
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var viewClasses = [
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'[object Int8Array]',
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'[object Uint8Array]',
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'[object Uint8ClampedArray]',
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'[object Int16Array]',
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'[object Uint16Array]',
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'[object Int32Array]',
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'[object Uint32Array]',
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'[object Float32Array]',
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'[object Float64Array]'
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]
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var isDataView = function(obj) {
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return obj && DataView.prototype.isPrototypeOf(obj)
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}
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var isArrayBufferView = ArrayBuffer.isView || function(obj) {
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return obj && viewClasses.indexOf(Object.prototype.toString.call(obj)) > -1
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}
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}
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function normalizeName(name) {
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if (typeof name !== 'string') {
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name = String(name)
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}
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if (/[^a-z0-9\-#$%&'*+.\^_`|~]/i.test(name)) {
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throw new TypeError('Invalid character in header field name')
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}
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return name.toLowerCase()
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}
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function normalizeValue(value) {
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if (typeof value !== 'string') {
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value = String(value)
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}
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return value
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}
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// Build a destructive iterator for the value list
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function iteratorFor(items) {
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var iterator = {
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next: function() {
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var value = items.shift()
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return {done: value === undefined, value: value}
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}
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}
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if (support.iterable) {
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iterator[Symbol.iterator] = function() {
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return iterator
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}
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}
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return iterator
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}
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function Headers(headers) {
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this.map = {}
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if (headers instanceof Headers) {
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headers.forEach(function(value, name) {
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this.append(name, value)
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}, this)
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} else if (Array.isArray(headers)) {
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headers.forEach(function(header) {
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this.append(header[0], header[1])
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}, this)
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} else if (headers) {
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Object.getOwnPropertyNames(headers).forEach(function(name) {
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this.append(name, headers[name])
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}, this)
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}
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}
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Headers.prototype.append = function(name, value) {
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name = normalizeName(name)
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value = normalizeValue(value)
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var oldValue = this.map[name]
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this.map[name] = oldValue ? oldValue+','+value : value
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}
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Headers.prototype['delete'] = function(name) {
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delete this.map[normalizeName(name)]
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}
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Headers.prototype.get = function(name) {
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name = normalizeName(name)
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return this.has(name) ? this.map[name] : null
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}
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Headers.prototype.has = function(name) {
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return this.map.hasOwnProperty(normalizeName(name))
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}
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Headers.prototype.set = function(name, value) {
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this.map[normalizeName(name)] = normalizeValue(value)
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}
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Headers.prototype.forEach = function(callback, thisArg) {
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for (var name in this.map) {
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if (this.map.hasOwnProperty(name)) {
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callback.call(thisArg, this.map[name], name, this)
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}
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}
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}
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Headers.prototype.keys = function() {
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var items = []
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this.forEach(function(value, name) { items.push(name) })
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return iteratorFor(items)
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}
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Headers.prototype.values = function() {
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var items = []
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this.forEach(function(value) { items.push(value) })
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return iteratorFor(items)
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}
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Headers.prototype.entries = function() {
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var items = []
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this.forEach(function(value, name) { items.push([name, value]) })
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return iteratorFor(items)
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}
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if (support.iterable) {
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Headers.prototype[Symbol.iterator] = Headers.prototype.entries
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}
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function consumed(body) {
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if (body.bodyUsed) {
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return Promise.reject(new TypeError('Already read'))
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}
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body.bodyUsed = true
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}
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function fileReaderReady(reader) {
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return new Promise(function(resolve, reject) {
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reader.onload = function() {
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resolve(reader.result)
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}
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reader.onerror = function() {
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reject(reader.error)
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}
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})
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}
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function readBlobAsArrayBuffer(blob) {
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var reader = new FileReader()
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var promise = fileReaderReady(reader)
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reader.readAsArrayBuffer(blob)
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return promise
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}
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function readBlobAsText(blob) {
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var reader = new FileReader()
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var promise = fileReaderReady(reader)
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reader.readAsText(blob)
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return promise
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}
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function readArrayBufferAsText(buf) {
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var view = new Uint8Array(buf)
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var chars = new Array(view.length)
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for (var i = 0; i < view.length; i++) {
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chars[i] = String.fromCharCode(view[i])
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}
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return chars.join('')
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}
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function bufferClone(buf) {
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if (buf.slice) {
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return buf.slice(0)
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} else {
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var view = new Uint8Array(buf.byteLength)
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view.set(new Uint8Array(buf))
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return view.buffer
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}
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}
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function Body() {
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this.bodyUsed = false
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this._initBody = function(body) {
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this._bodyInit = body
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if (!body) {
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this._bodyText = ''
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} else if (typeof body === 'string') {
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this._bodyText = body
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} else if (support.blob && Blob.prototype.isPrototypeOf(body)) {
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this._bodyBlob = body
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} else if (support.formData && FormData.prototype.isPrototypeOf(body)) {
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this._bodyFormData = body
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} else if (support.searchParams && URLSearchParams.prototype.isPrototypeOf(body)) {
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this._bodyText = body.toString()
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} else if (support.arrayBuffer && support.blob && isDataView(body)) {
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this._bodyArrayBuffer = bufferClone(body.buffer)
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// IE 10-11 can't handle a DataView body.
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this._bodyInit = new Blob([this._bodyArrayBuffer])
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} else if (support.arrayBuffer && (ArrayBuffer.prototype.isPrototypeOf(body) || isArrayBufferView(body))) {
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this._bodyArrayBuffer = bufferClone(body)
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} else {
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throw new Error('unsupported BodyInit type')
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}
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if (!this.headers.get('content-type')) {
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if (typeof body === 'string') {
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this.headers.set('content-type', 'text/plain;charset=UTF-8')
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} else if (this._bodyBlob && this._bodyBlob.type) {
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this.headers.set('content-type', this._bodyBlob.type)
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} else if (support.searchParams && URLSearchParams.prototype.isPrototypeOf(body)) {
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this.headers.set('content-type', 'application/x-www-form-urlencoded;charset=UTF-8')
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}
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}
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}
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if (support.blob) {
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this.blob = function() {
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var rejected = consumed(this)
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if (rejected) {
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return rejected
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}
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if (this._bodyBlob) {
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return Promise.resolve(this._bodyBlob)
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} else if (this._bodyArrayBuffer) {
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return Promise.resolve(new Blob([this._bodyArrayBuffer]))
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} else if (this._bodyFormData) {
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throw new Error('could not read FormData body as blob')
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} else {
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return Promise.resolve(new Blob([this._bodyText]))
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}
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}
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this.arrayBuffer = function() {
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if (this._bodyArrayBuffer) {
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return consumed(this) || Promise.resolve(this._bodyArrayBuffer)
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} else {
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return this.blob().then(readBlobAsArrayBuffer)
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}
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}
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}
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this.text = function() {
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var rejected = consumed(this)
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if (rejected) {
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return rejected
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}
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if (this._bodyBlob) {
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return readBlobAsText(this._bodyBlob)
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} else if (this._bodyArrayBuffer) {
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return Promise.resolve(readArrayBufferAsText(this._bodyArrayBuffer))
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} else if (this._bodyFormData) {
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throw new Error('could not read FormData body as text')
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} else {
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return Promise.resolve(this._bodyText)
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}
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}
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if (support.formData) {
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this.formData = function() {
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return this.text().then(decode)
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}
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}
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this.json = function() {
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return this.text().then(JSON.parse)
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}
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return this
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}
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// HTTP methods whose capitalization should be normalized
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var methods = ['DELETE', 'GET', 'HEAD', 'OPTIONS', 'POST', 'PUT']
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function normalizeMethod(method) {
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var upcased = method.toUpperCase()
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return (methods.indexOf(upcased) > -1) ? upcased : method
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}
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function Request(input, options) {
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options = options || {}
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var body = options.body
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if (input instanceof Request) {
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if (input.bodyUsed) {
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throw new TypeError('Already read')
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}
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this.url = input.url
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this.credentials = input.credentials
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if (!options.headers) {
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this.headers = new Headers(input.headers)
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}
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this.method = input.method
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this.mode = input.mode
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if (!body && input._bodyInit != null) {
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body = input._bodyInit
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input.bodyUsed = true
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}
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} else {
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this.url = String(input)
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}
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this.credentials = options.credentials || this.credentials || 'omit'
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if (options.headers || !this.headers) {
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this.headers = new Headers(options.headers)
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}
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this.method = normalizeMethod(options.method || this.method || 'GET')
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this.mode = options.mode || this.mode || null
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this.referrer = null
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if ((this.method === 'GET' || this.method === 'HEAD') && body) {
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throw new TypeError('Body not allowed for GET or HEAD requests')
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}
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this._initBody(body)
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}
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Request.prototype.clone = function() {
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return new Request(this, { body: this._bodyInit })
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}
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function decode(body) {
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var form = new FormData()
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body.trim().split('&').forEach(function(bytes) {
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if (bytes) {
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var split = bytes.split('=')
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var name = split.shift().replace(/\+/g, ' ')
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var value = split.join('=').replace(/\+/g, ' ')
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form.append(decodeURIComponent(name), decodeURIComponent(value))
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}
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})
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return form
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}
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function parseHeaders(rawHeaders) {
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var headers = new Headers()
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rawHeaders.split(/\r?\n/).forEach(function(line) {
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var parts = line.split(':')
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var key = parts.shift().trim()
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if (key) {
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var value = parts.join(':').trim()
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headers.append(key, value)
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}
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})
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return headers
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}
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Body.call(Request.prototype)
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function Response(bodyInit, options) {
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if (!options) {
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options = {}
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}
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this.type = 'default'
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this.status = 'status' in options ? options.status : 200
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this.ok = this.status >= 200 && this.status < 300
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this.statusText = 'statusText' in options ? options.statusText : 'OK'
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this.headers = new Headers(options.headers)
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this.url = options.url || ''
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this._initBody(bodyInit)
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}
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Body.call(Response.prototype)
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Response.prototype.clone = function() {
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return new Response(this._bodyInit, {
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status: this.status,
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statusText: this.statusText,
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headers: new Headers(this.headers),
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url: this.url
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})
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}
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Response.error = function() {
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var response = new Response(null, {status: 0, statusText: ''})
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response.type = 'error'
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return response
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}
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var redirectStatuses = [301, 302, 303, 307, 308]
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Response.redirect = function(url, status) {
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if (redirectStatuses.indexOf(status) === -1) {
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throw new RangeError('Invalid status code')
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}
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return new Response(null, {status: status, headers: {location: url}})
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}
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self.Headers = Headers
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self.Request = Request
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self.Response = Response
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self.fetch = function(input, init) {
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return new Promise(function(resolve, reject) {
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var request = new Request(input, init)
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var xhr = new XMLHttpRequest()
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xhr.onload = function() {
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var options = {
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status: xhr.status,
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statusText: xhr.statusText,
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headers: parseHeaders(xhr.getAllResponseHeaders() || '')
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}
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options.url = 'responseURL' in xhr ? xhr.responseURL : options.headers.get('X-Request-URL')
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var body = 'response' in xhr ? xhr.response : xhr.responseText
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resolve(new Response(body, options))
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}
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xhr.onerror = function() {
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reject(new TypeError('Network request failed'))
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}
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xhr.ontimeout = function() {
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reject(new TypeError('Network request failed'))
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}
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xhr.open(request.method, request.url, true)
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if (request.credentials === 'include') {
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xhr.withCredentials = true
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}
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if ('responseType' in xhr && support.blob) {
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xhr.responseType = 'blob'
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}
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request.headers.forEach(function(value, name) {
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xhr.setRequestHeader(name, value)
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})
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xhr.send(typeof request._bodyInit === 'undefined' ? null : request._bodyInit)
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})
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}
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self.fetch.polyfill = true
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})(typeof self !== 'undefined' ? self : this);
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