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121 lines
3.1 KiB
JavaScript
121 lines
3.1 KiB
JavaScript
var Stream = require('stream');
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var util = require('util');
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var Response = module.exports = function (res) {
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this.offset = 0;
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this.readable = true;
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};
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util.inherits(Response, Stream);
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var capable = {
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streaming : true,
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status2 : true
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};
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function parseHeaders (res) {
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var lines = res.getAllResponseHeaders().split(/\r?\n/);
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var headers = {};
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for (var i = 0; i < lines.length; i++) {
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var line = lines[i];
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if (line === '') continue;
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var m = line.match(/^([^:]+):\s*(.*)/);
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if (m) {
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var key = m[1].toLowerCase(), value = m[2];
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if (headers[key] !== undefined) {
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if (isArray(headers[key])) {
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headers[key].push(value);
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}
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else {
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headers[key] = [ headers[key], value ];
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}
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}
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else {
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headers[key] = value;
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}
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}
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else {
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headers[line] = true;
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}
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}
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return headers;
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}
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Response.prototype.getResponse = function (xhr) {
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var respType = String(xhr.responseType).toLowerCase();
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if (respType === 'blob') return xhr.responseBlob || xhr.response;
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if (respType === 'arraybuffer') return xhr.response;
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return xhr.responseText;
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}
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Response.prototype.getHeader = function (key) {
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return this.headers[key.toLowerCase()];
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};
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Response.prototype.handle = function (res) {
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if (res.readyState === 2 && capable.status2) {
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try {
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this.statusCode = res.status;
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this.headers = parseHeaders(res);
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}
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catch (err) {
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capable.status2 = false;
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}
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if (capable.status2) {
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this.emit('ready');
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}
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}
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else if (capable.streaming && res.readyState === 3) {
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try {
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if (!this.statusCode) {
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this.statusCode = res.status;
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this.headers = parseHeaders(res);
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this.emit('ready');
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}
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}
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catch (err) {}
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try {
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this._emitData(res);
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}
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catch (err) {
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capable.streaming = false;
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}
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}
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else if (res.readyState === 4) {
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if (!this.statusCode) {
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this.statusCode = res.status;
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this.emit('ready');
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}
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this._emitData(res);
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if (res.error) {
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this.emit('error', this.getResponse(res));
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}
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else this.emit('end');
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this.emit('close');
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}
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};
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Response.prototype._emitData = function (res) {
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var respBody = this.getResponse(res);
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if (respBody.toString().match(/ArrayBuffer/)) {
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this.emit('data', new Uint8Array(respBody, this.offset));
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this.offset = respBody.byteLength;
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return;
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}
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if (respBody.length > this.offset) {
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this.emit('data', respBody.slice(this.offset));
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this.offset = respBody.length;
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}
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};
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var isArray = Array.isArray || function (xs) {
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return Object.prototype.toString.call(xs) === '[object Array]';
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};
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