| <!DOCTYPE html> |
| <!-- |
| Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| Use of this source code is governed by a BSD-style license that can be |
| found in the LICENSE file. |
| --> |
| |
| <link rel="import" href="/tracing/base/base.html"> |
| |
| <script> |
| 'use strict'; |
| |
| tr.exportTo('tr.b', function() { |
| function guessBinary(url) { |
| return /[.]gz$/.test(url) || /[.]zip$/.test(url); |
| } |
| function get(url, async) { |
| var req = new XMLHttpRequest(); |
| req.overrideMimeType('text/plain; charset=x-user-defined'); |
| req.open('GET', url, async); |
| var isBinary = guessBinary(url); |
| if (isBinary && async) |
| req.responseType = 'arraybuffer'; |
| |
| if (!async) { |
| req.send(null); |
| if (req.status == 200) { |
| return req.responseText; |
| } else { |
| throw new Error('XHR failed with status ' + req.status); |
| } |
| } |
| |
| var p = new Promise(function(resolve, reject) { |
| req.onreadystatechange = function(aEvt) { |
| if (req.readyState == 4) { |
| window.setTimeout(function() { |
| if (req.status == 200) { |
| if (req.responseType === 'arraybuffer') |
| return resolve(req.response); |
| return resolve(req.responseText); |
| } else { |
| reject(new Error('XHR failed with status ' + req.status)); |
| } |
| }, 0); |
| } |
| }; |
| }); |
| req.send(); |
| return p; |
| } |
| |
| function getAsync(url) { |
| if (!tr.isHeadless) |
| return get(url, true); |
| var filename; |
| if (url.startsWith('file:///')) |
| filename = url.substring(7); |
| else |
| filename = global.hrefToAbsolutePath(url); |
| var isBinary = guessBinary(url); |
| return Promise.resolve().then(function() { |
| if (isBinary) |
| return readbuffer(filename); |
| return read(filename); |
| }); |
| } |
| |
| function getSync(url) { |
| if (!tr.isHeadless) |
| return get(url, false); |
| var filename; |
| if (url.startsWith('file:///')) |
| filename = url.substring(7); |
| else |
| filename = global.hrefToAbsolutePath(url); |
| var isBinary = guessBinary(url); |
| if (isBinary) |
| return readbuffer(filename); |
| return read(filename); |
| } |
| |
| return { |
| getAsync: getAsync, |
| getSync: getSync |
| }; |
| }); |
| </script> |
