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95 lines
3.1 KiB
95 lines
3.1 KiB
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
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/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */ |
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/* |
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Copyright 2013 Mozilla Foundation |
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Licensed under the Apache License, Version 2.0 (the "License"); |
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you may not use this file except in compliance with the License. |
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You may obtain a copy of the License at |
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http://www.apache.org/licenses/LICENSE-2.0 |
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Unless required by applicable law or agreed to in writing, software |
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distributed under the License is distributed on an "AS IS" BASIS, |
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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See the License for the specific language governing permissions and |
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limitations under the License. |
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*/ |
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/* globals chrome */ |
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'use strict'; |
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(function ExtensionRouterClosure() { |
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var VIEWER_URL = chrome.extension.getURL('content/web/viewer.html'); |
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var CRX_BASE_URL = chrome.extension.getURL('/'); |
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var schemes = [ |
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'http', |
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'https', |
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'ftp', |
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'file', |
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'chrome-extension', |
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// Chromium OS |
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'filesystem', |
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// Chromium OS, shorthand for filesystem:<origin>/external/ |
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'drive' |
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]; |
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/** |
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* @param {string} url The URL prefixed with chrome-extension://.../ |
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* @return {string|undefined} The percent-encoded URL of the (PDF) file. |
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*/ |
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function parseExtensionURL(url) { |
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url = url.substring(CRX_BASE_URL.length); |
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// Find the (url-encoded) colon and verify that the scheme is whitelisted. |
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var schemeIndex = url.search(/:|%3A/i); |
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if (schemeIndex === -1) { |
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return; |
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} |
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var scheme = url.slice(0, schemeIndex).toLowerCase(); |
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if (schemes.indexOf(scheme) >= 0) { |
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url = url.split('#')[0]; |
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if (url.charAt(schemeIndex) === ':') { |
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url = encodeURIComponent(url); |
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} |
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return url; |
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} |
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} |
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// TODO(rob): Use declarativeWebRequest once declared URL-encoding is |
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// supported, see http://crbug.com/273589 |
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// (or rewrite the query string parser in viewer.js to get it to |
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// recognize the non-URL-encoded PDF URL.) |
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chrome.webRequest.onBeforeRequest.addListener(function(details) { |
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// This listener converts chrome-extension://.../http://...pdf to |
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// chrome-extension://.../content/web/viewer.html?file=http%3A%2F%2F...pdf |
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var url = parseExtensionURL(details.url); |
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if (url) { |
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url = VIEWER_URL + '?file=' + url; |
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var i = details.url.indexOf('#'); |
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if (i > 0) { |
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url += details.url.slice(i); |
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} |
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console.log('Redirecting ' + details.url + ' to ' + url); |
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return { redirectUrl: url }; |
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} |
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}, { |
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types: ['main_frame', 'sub_frame'], |
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urls: schemes.map(function(scheme) { |
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// Format: "chrome-extension://[EXTENSIONID]/<scheme>*" |
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return CRX_BASE_URL + scheme + '*'; |
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}) |
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}, ['blocking']); |
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// When session restore is used, viewer pages may be loaded before the |
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// webRequest event listener is attached (= page not found). |
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// Reload these tabs. |
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chrome.tabs.query({ |
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url: CRX_BASE_URL + '*:*' |
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}, function(tabsFromLastSession) { |
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for (var i = 0; i < tabsFromLastSession.length; ++i) { |
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chrome.tabs.reload(tabsFromLastSession[i].id); |
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} |
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}); |
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console.log('Set up extension URL router.'); |
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})();
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