mediawiki-extensions-Multim.../tests/qunit/mmv/provider/mmv.provider.Image.test.js

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/*
* This file is part of the MediaWiki extension MultimediaViewer.
*
* MultimediaViewer is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* MultimediaViewer is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with MultimediaViewer. If not, see <http://www.gnu.org/licenses/>.
*/
( function ( mw, $ ) {
QUnit.module( 'mmv.provider.Image', QUnit.newMwEnvironment() );
QUnit.test( 'Image constructor sanity check', 1, function ( assert ) {
var imageProvider = new mw.mmv.provider.Image();
assert.ok( imageProvider );
} );
QUnit.test( 'Image load success', 2, function ( assert ) {
Use cross-origin img attribute instead of data URI After lots of experimenting with Wireshark and current Chrome + Firefox on Ubuntu 13.10, this is my current understanding of the caching when preloading images with AJAX requests: * on Chrome, the image request always comes from browser cache * Firefox makes two separate requests by default * Firefox with img.crossOrigin = 'anonymous' makes two separate requests, but the second one is a 304 (does not load the image twice) * when the image has already been cached by the browser (but not in this session), Chrome skips both requests; Firefox skips the AJAX request, but sends the normal one, and it returns with 304. "wish I knew this when I started" things: * the Chrome DevTools has an option to disable cache. When this is enabled, requests in the same document context still come from cache (so if I load the page, fire an AJAX request, then without reloading the page, fire an AJAX request to the same URL, then the second request will be cached), but an AJAX request - image request pair is an exception from this. * when using Ctrl-F5 in Firefox, requests on that page will never hit the cache (even AJAX request fired after user activity; even if two identical requests follow each other). When using clear cache + normal reload, this is not the case. * if the image does not have an Allow-Origin header and is loaded with crossOrigin=true, Firefox will refuse to load it. Chrome will log an error in the console saying it refused to load it, but will actually load it. * Wireshark rocks. Pushed some tech debt (browser + domain whitelist) into other tickets: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/232 https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/233 Reverted commits: 8a8d74f01d3dbd6d0c43b7fadc5284d204091761. 63021d0b0e95442cce101f9f92de8f0ff97d5f49. Change-Id: I84ab2f3ac0a9706926adf7fe8726ecd9e9f843e0 Bug: 61542 Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/207
2014-02-23 21:46:18 +00:00
var url = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQAQMAAAAlPW0'
+ 'iAAAABlBMVEUAAAD///+l2Z/dAAAAM0lEQVR4nGP4/5/h/1+G/58ZDrAz3D/McH'
+ '8yw83NDDeNGe4Ug9C9zwz3gVLMDA/A6P9/AFGGFyjOXZtQAAAAAElFTkSuQmCC',
imageProvider = new mw.mmv.provider.Image();
imageProvider.imagePreloadingSupported = function () { return false; };
imageProvider.performance.recordEntry = $.noop;
QUnit.stop();
Use cross-origin img attribute instead of data URI After lots of experimenting with Wireshark and current Chrome + Firefox on Ubuntu 13.10, this is my current understanding of the caching when preloading images with AJAX requests: * on Chrome, the image request always comes from browser cache * Firefox makes two separate requests by default * Firefox with img.crossOrigin = 'anonymous' makes two separate requests, but the second one is a 304 (does not load the image twice) * when the image has already been cached by the browser (but not in this session), Chrome skips both requests; Firefox skips the AJAX request, but sends the normal one, and it returns with 304. "wish I knew this when I started" things: * the Chrome DevTools has an option to disable cache. When this is enabled, requests in the same document context still come from cache (so if I load the page, fire an AJAX request, then without reloading the page, fire an AJAX request to the same URL, then the second request will be cached), but an AJAX request - image request pair is an exception from this. * when using Ctrl-F5 in Firefox, requests on that page will never hit the cache (even AJAX request fired after user activity; even if two identical requests follow each other). When using clear cache + normal reload, this is not the case. * if the image does not have an Allow-Origin header and is loaded with crossOrigin=true, Firefox will refuse to load it. Chrome will log an error in the console saying it refused to load it, but will actually load it. * Wireshark rocks. Pushed some tech debt (browser + domain whitelist) into other tickets: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/232 https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/233 Reverted commits: 8a8d74f01d3dbd6d0c43b7fadc5284d204091761. 63021d0b0e95442cce101f9f92de8f0ff97d5f49. Change-Id: I84ab2f3ac0a9706926adf7fe8726ecd9e9f843e0 Bug: 61542 Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/207
2014-02-23 21:46:18 +00:00
imageProvider.get( url ).then( function( image ) {
assert.ok( image instanceof HTMLImageElement,
'success handler was called with the image element');
assert.strictEqual( image.src, url, 'image src is correct');
QUnit.start();
Use cross-origin img attribute instead of data URI After lots of experimenting with Wireshark and current Chrome + Firefox on Ubuntu 13.10, this is my current understanding of the caching when preloading images with AJAX requests: * on Chrome, the image request always comes from browser cache * Firefox makes two separate requests by default * Firefox with img.crossOrigin = 'anonymous' makes two separate requests, but the second one is a 304 (does not load the image twice) * when the image has already been cached by the browser (but not in this session), Chrome skips both requests; Firefox skips the AJAX request, but sends the normal one, and it returns with 304. "wish I knew this when I started" things: * the Chrome DevTools has an option to disable cache. When this is enabled, requests in the same document context still come from cache (so if I load the page, fire an AJAX request, then without reloading the page, fire an AJAX request to the same URL, then the second request will be cached), but an AJAX request - image request pair is an exception from this. * when using Ctrl-F5 in Firefox, requests on that page will never hit the cache (even AJAX request fired after user activity; even if two identical requests follow each other). When using clear cache + normal reload, this is not the case. * if the image does not have an Allow-Origin header and is loaded with crossOrigin=true, Firefox will refuse to load it. Chrome will log an error in the console saying it refused to load it, but will actually load it. * Wireshark rocks. Pushed some tech debt (browser + domain whitelist) into other tickets: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/232 https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/233 Reverted commits: 8a8d74f01d3dbd6d0c43b7fadc5284d204091761. 63021d0b0e95442cce101f9f92de8f0ff97d5f49. Change-Id: I84ab2f3ac0a9706926adf7fe8726ecd9e9f843e0 Bug: 61542 Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/207
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} );
} );
QUnit.test( 'Image caching', 6, function ( assert ) {
Use cross-origin img attribute instead of data URI After lots of experimenting with Wireshark and current Chrome + Firefox on Ubuntu 13.10, this is my current understanding of the caching when preloading images with AJAX requests: * on Chrome, the image request always comes from browser cache * Firefox makes two separate requests by default * Firefox with img.crossOrigin = 'anonymous' makes two separate requests, but the second one is a 304 (does not load the image twice) * when the image has already been cached by the browser (but not in this session), Chrome skips both requests; Firefox skips the AJAX request, but sends the normal one, and it returns with 304. "wish I knew this when I started" things: * the Chrome DevTools has an option to disable cache. When this is enabled, requests in the same document context still come from cache (so if I load the page, fire an AJAX request, then without reloading the page, fire an AJAX request to the same URL, then the second request will be cached), but an AJAX request - image request pair is an exception from this. * when using Ctrl-F5 in Firefox, requests on that page will never hit the cache (even AJAX request fired after user activity; even if two identical requests follow each other). When using clear cache + normal reload, this is not the case. * if the image does not have an Allow-Origin header and is loaded with crossOrigin=true, Firefox will refuse to load it. Chrome will log an error in the console saying it refused to load it, but will actually load it. * Wireshark rocks. Pushed some tech debt (browser + domain whitelist) into other tickets: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/232 https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/233 Reverted commits: 8a8d74f01d3dbd6d0c43b7fadc5284d204091761. 63021d0b0e95442cce101f9f92de8f0ff97d5f49. Change-Id: I84ab2f3ac0a9706926adf7fe8726ecd9e9f843e0 Bug: 61542 Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/207
2014-02-23 21:46:18 +00:00
var url = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQAQMAAAAlPW0'
+ 'iAAAABlBMVEUAAAD///+l2Z/dAAAAM0lEQVR4nGP4/5/h/1+G/58ZDrAz3D/McH'
+ '8yw83NDDeNGe4Ug9C9zwz3gVLMDA/A6P9/AFGGFyjOXZtQAAAAAElFTkSuQmCC',
url2 = 'data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==',
result,
imageProvider = new mw.mmv.provider.Image();
imageProvider.imagePreloadingSupported = function () { return false; };
imageProvider.performance.recordEntry = $.noop;
QUnit.stop();
Use cross-origin img attribute instead of data URI After lots of experimenting with Wireshark and current Chrome + Firefox on Ubuntu 13.10, this is my current understanding of the caching when preloading images with AJAX requests: * on Chrome, the image request always comes from browser cache * Firefox makes two separate requests by default * Firefox with img.crossOrigin = 'anonymous' makes two separate requests, but the second one is a 304 (does not load the image twice) * when the image has already been cached by the browser (but not in this session), Chrome skips both requests; Firefox skips the AJAX request, but sends the normal one, and it returns with 304. "wish I knew this when I started" things: * the Chrome DevTools has an option to disable cache. When this is enabled, requests in the same document context still come from cache (so if I load the page, fire an AJAX request, then without reloading the page, fire an AJAX request to the same URL, then the second request will be cached), but an AJAX request - image request pair is an exception from this. * when using Ctrl-F5 in Firefox, requests on that page will never hit the cache (even AJAX request fired after user activity; even if two identical requests follow each other). When using clear cache + normal reload, this is not the case. * if the image does not have an Allow-Origin header and is loaded with crossOrigin=true, Firefox will refuse to load it. Chrome will log an error in the console saying it refused to load it, but will actually load it. * Wireshark rocks. Pushed some tech debt (browser + domain whitelist) into other tickets: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/232 https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/233 Reverted commits: 8a8d74f01d3dbd6d0c43b7fadc5284d204091761. 63021d0b0e95442cce101f9f92de8f0ff97d5f49. Change-Id: I84ab2f3ac0a9706926adf7fe8726ecd9e9f843e0 Bug: 61542 Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/207
2014-02-23 21:46:18 +00:00
imageProvider.get( url ).then( function( image ) {
result = image;
assert.ok( image instanceof HTMLImageElement,
'success handler was called with the image element');
Use cross-origin img attribute instead of data URI After lots of experimenting with Wireshark and current Chrome + Firefox on Ubuntu 13.10, this is my current understanding of the caching when preloading images with AJAX requests: * on Chrome, the image request always comes from browser cache * Firefox makes two separate requests by default * Firefox with img.crossOrigin = 'anonymous' makes two separate requests, but the second one is a 304 (does not load the image twice) * when the image has already been cached by the browser (but not in this session), Chrome skips both requests; Firefox skips the AJAX request, but sends the normal one, and it returns with 304. "wish I knew this when I started" things: * the Chrome DevTools has an option to disable cache. When this is enabled, requests in the same document context still come from cache (so if I load the page, fire an AJAX request, then without reloading the page, fire an AJAX request to the same URL, then the second request will be cached), but an AJAX request - image request pair is an exception from this. * when using Ctrl-F5 in Firefox, requests on that page will never hit the cache (even AJAX request fired after user activity; even if two identical requests follow each other). When using clear cache + normal reload, this is not the case. * if the image does not have an Allow-Origin header and is loaded with crossOrigin=true, Firefox will refuse to load it. Chrome will log an error in the console saying it refused to load it, but will actually load it. * Wireshark rocks. Pushed some tech debt (browser + domain whitelist) into other tickets: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/232 https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/233 Reverted commits: 8a8d74f01d3dbd6d0c43b7fadc5284d204091761. 63021d0b0e95442cce101f9f92de8f0ff97d5f49. Change-Id: I84ab2f3ac0a9706926adf7fe8726ecd9e9f843e0 Bug: 61542 Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/207
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assert.strictEqual( image.src, url, 'image src is correct');
QUnit.start();
} );
QUnit.stop();
imageProvider.get( url ).then( function( image ) {
assert.strictEqual( image, result, 'image element is cached and not regenerated' );
assert.strictEqual( image.src, url, 'image src is correct');
QUnit.start();
} );
Use cross-origin img attribute instead of data URI After lots of experimenting with Wireshark and current Chrome + Firefox on Ubuntu 13.10, this is my current understanding of the caching when preloading images with AJAX requests: * on Chrome, the image request always comes from browser cache * Firefox makes two separate requests by default * Firefox with img.crossOrigin = 'anonymous' makes two separate requests, but the second one is a 304 (does not load the image twice) * when the image has already been cached by the browser (but not in this session), Chrome skips both requests; Firefox skips the AJAX request, but sends the normal one, and it returns with 304. "wish I knew this when I started" things: * the Chrome DevTools has an option to disable cache. When this is enabled, requests in the same document context still come from cache (so if I load the page, fire an AJAX request, then without reloading the page, fire an AJAX request to the same URL, then the second request will be cached), but an AJAX request - image request pair is an exception from this. * when using Ctrl-F5 in Firefox, requests on that page will never hit the cache (even AJAX request fired after user activity; even if two identical requests follow each other). When using clear cache + normal reload, this is not the case. * if the image does not have an Allow-Origin header and is loaded with crossOrigin=true, Firefox will refuse to load it. Chrome will log an error in the console saying it refused to load it, but will actually load it. * Wireshark rocks. Pushed some tech debt (browser + domain whitelist) into other tickets: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/232 https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/233 Reverted commits: 8a8d74f01d3dbd6d0c43b7fadc5284d204091761. 63021d0b0e95442cce101f9f92de8f0ff97d5f49. Change-Id: I84ab2f3ac0a9706926adf7fe8726ecd9e9f843e0 Bug: 61542 Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/207
2014-02-23 21:46:18 +00:00
QUnit.stop();
imageProvider.get( url2 ).then( function( image ) {
assert.notStrictEqual( image, result, 'image element for different url is not cached' );
assert.strictEqual( image.src, url2, 'image src is correct');
QUnit.start();
} );
} );
QUnit.test( 'Image load XHR progress funneling', 7, function ( assert ) {
var i = 0,
imageProvider = new mw.mmv.provider.Image(),
oldPerformance = imageProvider.performance,
fakeURL = 'fakeURL',
response = 'response';
imageProvider.performance.delay = 0;
imageProvider.imagePreloadingSupported = function () { return true; };
imageProvider.rawGet = function () { return $.Deferred().resolve(); };
imageProvider.performance.newXHR = function () {
return { readyState: 4,
response: response,
send: function () {
var self = this;
// The timeout is necessary because without it notify() happens before
// the imageProvider has time to chain its progress() to the returned deferred
setTimeout( function () {
self.onprogress( { lengthComputable: true, loaded : 10, total : 20 } );
self.onreadystatechange();
} );
},
open: $.noop };
};
QUnit.stop();
imageProvider.performance.recordEntry = function ( type, total, url ) {
QUnit.start();
assert.strictEqual( type, 'image', 'Type matches' );
assert.strictEqual( url, fakeURL, 'URL matches' );
imageProvider.performance = oldPerformance;
return $.Deferred().resolve();
};
QUnit.stop();
Use cross-origin img attribute instead of data URI After lots of experimenting with Wireshark and current Chrome + Firefox on Ubuntu 13.10, this is my current understanding of the caching when preloading images with AJAX requests: * on Chrome, the image request always comes from browser cache * Firefox makes two separate requests by default * Firefox with img.crossOrigin = 'anonymous' makes two separate requests, but the second one is a 304 (does not load the image twice) * when the image has already been cached by the browser (but not in this session), Chrome skips both requests; Firefox skips the AJAX request, but sends the normal one, and it returns with 304. "wish I knew this when I started" things: * the Chrome DevTools has an option to disable cache. When this is enabled, requests in the same document context still come from cache (so if I load the page, fire an AJAX request, then without reloading the page, fire an AJAX request to the same URL, then the second request will be cached), but an AJAX request - image request pair is an exception from this. * when using Ctrl-F5 in Firefox, requests on that page will never hit the cache (even AJAX request fired after user activity; even if two identical requests follow each other). When using clear cache + normal reload, this is not the case. * if the image does not have an Allow-Origin header and is loaded with crossOrigin=true, Firefox will refuse to load it. Chrome will log an error in the console saying it refused to load it, but will actually load it. * Wireshark rocks. Pushed some tech debt (browser + domain whitelist) into other tickets: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/232 https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/233 Reverted commits: 8a8d74f01d3dbd6d0c43b7fadc5284d204091761. 63021d0b0e95442cce101f9f92de8f0ff97d5f49. Change-Id: I84ab2f3ac0a9706926adf7fe8726ecd9e9f843e0 Bug: 61542 Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/207
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imageProvider.get( fakeURL )
.fail( function () {
QUnit.start();
assert.ok( false, 'Image failed to (pretend to) load' );
} )
.then( function () {
QUnit.start();
assert.ok( true, 'Image was pretend-loaded' );
} )
.progress( function ( response, percent ) {
if ( i === 0 ) {
assert.strictEqual( percent, 50, 'Correctly propagated a 50% progress event' );
assert.strictEqual( response, response, 'Partial response propagated' );
} else if ( i === 1 ) {
assert.strictEqual( percent, 100, 'Correctly propagated a 100% progress event' );
assert.strictEqual( response, response, 'Partial response propagated' );
} else {
assert.ok( false, 'Only 2 progress events should propagate' );
}
i++;
} );
} );
QUnit.asyncTest( 'Image load fail', 1, function ( assert ) {
var imageProvider = new mw.mmv.provider.Image();
imageProvider.imagePreloadingSupported = function () { return false; };
imageProvider.performance.recordEntry = $.noop;
Use cross-origin img attribute instead of data URI After lots of experimenting with Wireshark and current Chrome + Firefox on Ubuntu 13.10, this is my current understanding of the caching when preloading images with AJAX requests: * on Chrome, the image request always comes from browser cache * Firefox makes two separate requests by default * Firefox with img.crossOrigin = 'anonymous' makes two separate requests, but the second one is a 304 (does not load the image twice) * when the image has already been cached by the browser (but not in this session), Chrome skips both requests; Firefox skips the AJAX request, but sends the normal one, and it returns with 304. "wish I knew this when I started" things: * the Chrome DevTools has an option to disable cache. When this is enabled, requests in the same document context still come from cache (so if I load the page, fire an AJAX request, then without reloading the page, fire an AJAX request to the same URL, then the second request will be cached), but an AJAX request - image request pair is an exception from this. * when using Ctrl-F5 in Firefox, requests on that page will never hit the cache (even AJAX request fired after user activity; even if two identical requests follow each other). When using clear cache + normal reload, this is not the case. * if the image does not have an Allow-Origin header and is loaded with crossOrigin=true, Firefox will refuse to load it. Chrome will log an error in the console saying it refused to load it, but will actually load it. * Wireshark rocks. Pushed some tech debt (browser + domain whitelist) into other tickets: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/232 https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/233 Reverted commits: 8a8d74f01d3dbd6d0c43b7fadc5284d204091761. 63021d0b0e95442cce101f9f92de8f0ff97d5f49. Change-Id: I84ab2f3ac0a9706926adf7fe8726ecd9e9f843e0 Bug: 61542 Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/207
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imageProvider.get( 'doesntexist.png' ).fail( function() {
Use cross-origin img attribute instead of data URI After lots of experimenting with Wireshark and current Chrome + Firefox on Ubuntu 13.10, this is my current understanding of the caching when preloading images with AJAX requests: * on Chrome, the image request always comes from browser cache * Firefox makes two separate requests by default * Firefox with img.crossOrigin = 'anonymous' makes two separate requests, but the second one is a 304 (does not load the image twice) * when the image has already been cached by the browser (but not in this session), Chrome skips both requests; Firefox skips the AJAX request, but sends the normal one, and it returns with 304. "wish I knew this when I started" things: * the Chrome DevTools has an option to disable cache. When this is enabled, requests in the same document context still come from cache (so if I load the page, fire an AJAX request, then without reloading the page, fire an AJAX request to the same URL, then the second request will be cached), but an AJAX request - image request pair is an exception from this. * when using Ctrl-F5 in Firefox, requests on that page will never hit the cache (even AJAX request fired after user activity; even if two identical requests follow each other). When using clear cache + normal reload, this is not the case. * if the image does not have an Allow-Origin header and is loaded with crossOrigin=true, Firefox will refuse to load it. Chrome will log an error in the console saying it refused to load it, but will actually load it. * Wireshark rocks. Pushed some tech debt (browser + domain whitelist) into other tickets: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/232 https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/233 Reverted commits: 8a8d74f01d3dbd6d0c43b7fadc5284d204091761. 63021d0b0e95442cce101f9f92de8f0ff97d5f49. Change-Id: I84ab2f3ac0a9706926adf7fe8726ecd9e9f843e0 Bug: 61542 Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/207
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assert.ok( true, 'fail handler was called' );
QUnit.start();
} );
} );
QUnit.test( 'Image load with preloading supported', 1, function ( assert ) {
Use cross-origin img attribute instead of data URI After lots of experimenting with Wireshark and current Chrome + Firefox on Ubuntu 13.10, this is my current understanding of the caching when preloading images with AJAX requests: * on Chrome, the image request always comes from browser cache * Firefox makes two separate requests by default * Firefox with img.crossOrigin = 'anonymous' makes two separate requests, but the second one is a 304 (does not load the image twice) * when the image has already been cached by the browser (but not in this session), Chrome skips both requests; Firefox skips the AJAX request, but sends the normal one, and it returns with 304. "wish I knew this when I started" things: * the Chrome DevTools has an option to disable cache. When this is enabled, requests in the same document context still come from cache (so if I load the page, fire an AJAX request, then without reloading the page, fire an AJAX request to the same URL, then the second request will be cached), but an AJAX request - image request pair is an exception from this. * when using Ctrl-F5 in Firefox, requests on that page will never hit the cache (even AJAX request fired after user activity; even if two identical requests follow each other). When using clear cache + normal reload, this is not the case. * if the image does not have an Allow-Origin header and is loaded with crossOrigin=true, Firefox will refuse to load it. Chrome will log an error in the console saying it refused to load it, but will actually load it. * Wireshark rocks. Pushed some tech debt (browser + domain whitelist) into other tickets: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/232 https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/233 Reverted commits: 8a8d74f01d3dbd6d0c43b7fadc5284d204091761. 63021d0b0e95442cce101f9f92de8f0ff97d5f49. Change-Id: I84ab2f3ac0a9706926adf7fe8726ecd9e9f843e0 Bug: 61542 Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/207
2014-02-23 21:46:18 +00:00
var url = mw.config.get( 'wgScriptPath' ) + '/skins/vector/images/search-ltr.png',
imageProvider = new mw.mmv.provider.Image(),
endsWith = function ( a, b ) { return a.indexOf( b ) === a.length - b.length; };
imageProvider.imagePreloadingSupported = function () { return true; };
imageProvider.performance = {
record: function() { return $.Deferred().resolve(); }
};
QUnit.stop();
imageProvider.get( url ).done( function( image ) {
// can't test equality as browsers transform this to a full URL
assert.ok( endsWith( image.src, url ), 'local image loaded with correct source');
QUnit.start();
} ).fail( function () {
// do not hold up the tests if the image failed to load
assert.ok( false, 'uh-oh, couldnt load - might be a problem with the test installation' );
QUnit.start();
} );
} );
QUnit.test( 'Failed image load with preloading supported', 1, function ( assert ) {
Use cross-origin img attribute instead of data URI After lots of experimenting with Wireshark and current Chrome + Firefox on Ubuntu 13.10, this is my current understanding of the caching when preloading images with AJAX requests: * on Chrome, the image request always comes from browser cache * Firefox makes two separate requests by default * Firefox with img.crossOrigin = 'anonymous' makes two separate requests, but the second one is a 304 (does not load the image twice) * when the image has already been cached by the browser (but not in this session), Chrome skips both requests; Firefox skips the AJAX request, but sends the normal one, and it returns with 304. "wish I knew this when I started" things: * the Chrome DevTools has an option to disable cache. When this is enabled, requests in the same document context still come from cache (so if I load the page, fire an AJAX request, then without reloading the page, fire an AJAX request to the same URL, then the second request will be cached), but an AJAX request - image request pair is an exception from this. * when using Ctrl-F5 in Firefox, requests on that page will never hit the cache (even AJAX request fired after user activity; even if two identical requests follow each other). When using clear cache + normal reload, this is not the case. * if the image does not have an Allow-Origin header and is loaded with crossOrigin=true, Firefox will refuse to load it. Chrome will log an error in the console saying it refused to load it, but will actually load it. * Wireshark rocks. Pushed some tech debt (browser + domain whitelist) into other tickets: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/232 https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/233 Reverted commits: 8a8d74f01d3dbd6d0c43b7fadc5284d204091761. 63021d0b0e95442cce101f9f92de8f0ff97d5f49. Change-Id: I84ab2f3ac0a9706926adf7fe8726ecd9e9f843e0 Bug: 61542 Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/207
2014-02-23 21:46:18 +00:00
var url = 'nosuchimage.png',
imageProvider = new mw.mmv.provider.Image();
imageProvider.imagePreloadingSupported = function () { return true; };
imageProvider.performance = {
record: function() { return $.Deferred().resolve(); }
};
QUnit.stop();
imageProvider.get( url ).fail( function () {
assert.ok( true, 'Fail callback called for non-existing image' );
QUnit.start();
} );
} );
}( mediaWiki, jQuery ) );