83b780af81
Before commit: chrome-extension://EXTENSIONID/content/web/viewer.html?file=http%3A%2F%2Fexample.com%2Ffile.pdf After commit: chrome-extension://EXTENSIONID/http://example/file.pdf Technical details: - The extension's background page uses the webRequest API to intercept requests for <extension host>/<real path to pdf>, and redirect it to the viewer's URL. - viewer.js uses history.replaceState to rewrite the URL, so that it's easier for users to recognize and copy-paste URLs. - The fake paths /http:, /https:, /file:, etc. have been added to the web_accessible_resources section of the manifest file, in order to avoid seeing chrome-extension://invalid/ instead of the actual URL when using history back/forward to navigate from/to the PDF viewer. - Since the relative path resolving doesn't work because relative URLs are inaccurate, a <base> tag has been added. This method has already been proven to work in the Firefox add-on. Notes: - This commit has been cherry-picked from crx-using-streams-api. - Need to merge https://github.com/mozilla/pdf.js/pull/3582 to deal with a bug in Chrome <=30 - In Chrome, getting the contents of a FTP file is not possible, so there's no support for FTP files, even though the extension router recognizes the ftp: scheme.
55 lines
2.1 KiB
JavaScript
55 lines
2.1 KiB
JavaScript
/* -*- 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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// 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 = details.url.substring(CRX_BASE_URL.length);
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var matchingUrl = /^(?:https?|file|ftp|chrome-extension)(:|%3A)/.exec(url);
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if (matchingUrl) {
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// location.hash is restored when "#" is missing from URL.
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url = url.split('#')[0];
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if (matchingUrl[1] === ':') {
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url = encodeURIComponent(url);
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}
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url = VIEWER_URL + '?file=' + url;
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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: [
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CRX_BASE_URL + 'http*', // and https
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CRX_BASE_URL + 'file*',
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CRX_BASE_URL + 'ftp*',
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CRX_BASE_URL + 'chrome-extension*'
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]
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}, ['blocking']);
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console.log('Set up extension URL router.');
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})();
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