/**
* @license
* Copyright 2016 Google Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
const Gather = require('./gather');
const manifestParser = require('../lib/manifest-parser');
/* global document, XMLHttpRequest, __returnResults */
/* istanbul ignore next */
function getManifestContent() {
function post(response) {
// __returnResults is magically inserted by driver.evaluateAsync
__returnResults(response);
}
const manifestNode = document.querySelector('link[rel=manifest]');
if (!manifestNode) {
return post({error: 'No <link rel="manifest"> found in DOM.'});
}
const manifestURL = manifestNode.href;
if (!manifestURL) {
return post({error: 'No href found on <link rel="manifest">.'});
}
const req = new XMLHttpRequest();
req.open('GET', manifestURL);
req.onload = function() {
if (req.status !== 200) {
return post({
error: `Unable to fetch manifest at \
${manifestURL}: ${req.status} - ${req.statusText}`
});
}
post({manifestContent: req.response});
};
req.send();
}
class Manifest extends Gather {
get name() {
return 'manifest';
}
static _errorManifest(errorString) {
return {
raw: undefined,
value: undefined,
debugString: errorString
};
}
postProfiling(options) {
const driver = options.driver;
/**
* This re-fetches the manifest separately, which could
* potentially lead to a different asset. Using the original manifest
* resource is tracked in issue #83
*/
return driver.evaluateAsync(`(${getManifestContent.toString()}())`)
.then(returnedValue => {
if (!returnedValue) {
this.artifact = Manifest._errorManifest('Unable to retrieve manifest');
return;
}
if (returnedValue.error) {
this.artifact = Manifest._errorManifest(returnedValue.error);
} else {
this.artifact = manifestParser(returnedValue.manifestContent);
}
}, _ => {
this.artifact = Manifest._errorManifest('Unable to retrieve manifest');
return;
});
}
}
module.exports = Manifest;
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