mirror of
https://github.com/mozilla/gecko-dev.git
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2cb38dd9d9
--- dom/ipc/manifestMessages.js | 78 ++++++++++------------ dom/manifest/ManifestObtainer.js | 9 ++- .../test/browser_ManifestObtainer_obtain.js | 45 +++++++++++++ 3 files changed, 90 insertions(+), 42 deletions(-)
100 lines
2.9 KiB
JavaScript
100 lines
2.9 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.*/
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/*
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* Manifest obtainer frame script implementation of:
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* http://www.w3.org/TR/appmanifest/#obtaining
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*
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* It searches a top-level browsing context for
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* a <link rel=manifest> element. Then fetches
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* and processes the linked manifest.
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*
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* BUG: https://bugzilla.mozilla.org/show_bug.cgi?id=1083410
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*/
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/*globals content, sendAsyncMessage, addMessageListener, Components*/
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'use strict';
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const {
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utils: Cu
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} = Components;
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const {
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ManifestProcessor
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} = Cu.import('resource://gre/modules/WebManifest.jsm', {});
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const {
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Task: {
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spawn, async
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}
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} = Components.utils.import('resource://gre/modules/Task.jsm', {});
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addMessageListener('DOM:ManifestObtainer:Obtain', async(function* (aMsg) {
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const response = {
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msgId: aMsg.data.msgId,
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success: true,
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result: undefined
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};
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try {
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response.result = yield fetchManifest();
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} catch (err) {
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response.result = cloneError(err);
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}
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sendAsyncMessage('DOM:ManifestObtainer:Obtain', response);
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}));
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function cloneError(aError) {
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const clone = {
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'fileName': String(aError.fileName),
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'lineNumber': String(aError.lineNumber),
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'columnNumber': String(aError.columnNumber),
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'stack': String(aError.stack),
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'message': String(aError.message),
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'name': String(aError.name)
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};
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return clone;
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}
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function fetchManifest() {
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return spawn(function* () {
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if (!content || content.top !== content) {
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let msg = 'Content window must be a top-level browsing context.';
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throw new Error(msg);
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}
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const elem = content.document.querySelector('link[rel~="manifest"]');
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if (!elem || !elem.getAttribute('href')) {
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let msg = 'No manifest to fetch.';
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throw new Error(msg);
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}
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// Throws on malformed URLs
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const manifestURL = new content.URL(elem.href, elem.baseURI);
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const reqInit = {
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mode: 'cors'
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};
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if (elem.crossOrigin === 'use-credentials') {
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reqInit.credentials = 'include';
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}
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const req = new content.Request(manifestURL, reqInit);
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req.setContext('manifest');
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const response = yield content.fetch(req);
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const manifest = yield processResponse(response, content);
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return manifest;
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});
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}
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function processResponse(aResp, aContentWindow) {
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return spawn(function* () {
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const badStatus = aResp.status < 200 || aResp.status >= 300;
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if (aResp.type === 'error' || badStatus) {
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let msg =
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`Fetch error: ${aResp.status} - ${aResp.statusText} at ${aResp.url}`;
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throw new Error(msg);
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}
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const text = yield aResp.text();
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const args = {
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jsonText: text,
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manifestURL: aResp.url,
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docURL: aContentWindow.location.href
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};
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const processor = new ManifestProcessor();
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const manifest = processor.process(args);
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return Cu.cloneInto(manifest, content);
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});
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}
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