forked from mirrors/gecko-dev
80327d3561
Differential Revision: https://phabricator.services.mozilla.com/D3729 --HG-- extra : rebase_source : e187b8e9a6b6db7ebc762adda5e489b25c7a7e43 extra : histedit_source : 868cb99d09954a51d6be321fcb516475ef70eb33
987 lines
31 KiB
JavaScript
987 lines
31 KiB
JavaScript
/* Copyright 2012 Mozilla Foundation
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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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"use strict";
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var EXPORTED_SYMBOLS = ["PdfStreamConverter"];
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const PDFJS_EVENT_ID = "pdf.js.message";
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const PREF_PREFIX = "pdfjs";
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const PDF_VIEWER_ORIGIN = "resource://pdf.js";
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const PDF_VIEWER_WEB_PAGE = "resource://pdf.js/web/viewer.html";
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const MAX_NUMBER_OF_PREFS = 50;
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const MAX_STRING_PREF_LENGTH = 128;
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ChromeUtils.import("resource://gre/modules/XPCOMUtils.jsm");
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ChromeUtils.import("resource://gre/modules/Services.jsm");
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ChromeUtils.defineModuleGetter(this, "NetUtil",
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"resource://gre/modules/NetUtil.jsm");
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ChromeUtils.defineModuleGetter(this, "NetworkManager",
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"resource://pdf.js/PdfJsNetwork.jsm");
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ChromeUtils.defineModuleGetter(this, "PrivateBrowsingUtils",
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"resource://gre/modules/PrivateBrowsingUtils.jsm");
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ChromeUtils.defineModuleGetter(this, "PdfJsTelemetry",
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"resource://pdf.js/PdfJsTelemetry.jsm");
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ChromeUtils.defineModuleGetter(this, "PdfjsContentUtils",
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"resource://pdf.js/PdfjsContentUtils.jsm");
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XPCOMUtils.defineLazyGlobalGetters(this, ["XMLHttpRequest"]);
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var Svc = {};
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XPCOMUtils.defineLazyServiceGetter(Svc, "mime",
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"@mozilla.org/mime;1",
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"nsIMIMEService");
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function getBoolPref(pref, def) {
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try {
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return Services.prefs.getBoolPref(pref);
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} catch (ex) {
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return def;
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}
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}
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function getIntPref(pref, def) {
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try {
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return Services.prefs.getIntPref(pref);
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} catch (ex) {
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return def;
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}
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}
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function getStringPref(pref, def) {
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try {
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return Services.prefs.getStringPref(pref);
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} catch (ex) {
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return def;
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}
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}
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function log(aMsg) {
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if (!getBoolPref(PREF_PREFIX + ".pdfBugEnabled", false)) {
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return;
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}
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var msg = "PdfStreamConverter.js: " + (aMsg.join ? aMsg.join("") : aMsg);
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Services.console.logStringMessage(msg);
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dump(msg + "\n");
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}
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function getDOMWindow(aChannel, aPrincipal) {
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var requestor = aChannel.notificationCallbacks ?
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aChannel.notificationCallbacks :
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aChannel.loadGroup.notificationCallbacks;
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var win = requestor.getInterface(Ci.nsIDOMWindow);
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// Ensure the window wasn't navigated to something that is not PDF.js.
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if (!win.document.nodePrincipal.equals(aPrincipal)) {
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return null;
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}
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return win;
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}
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function getLocalizedStrings(path) {
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var stringBundle =
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Services.strings.createBundle("chrome://pdf.js/locale/" + path);
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var map = {};
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for (let string of stringBundle.getSimpleEnumeration()) {
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var key = string.key, property = "textContent";
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var i = key.lastIndexOf(".");
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if (i >= 0) {
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property = key.substring(i + 1);
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key = key.substring(0, i);
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}
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if (!(key in map)) {
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map[key] = {};
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}
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map[key][property] = string.value;
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}
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return map;
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}
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function getLocalizedString(strings, id, property) {
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property = property || "textContent";
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if (id in strings) {
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return strings[id][property];
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}
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return id;
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}
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// PDF data storage
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function PdfDataListener(length) {
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this.length = length; // less than 0, if length is unknown
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this.buffers = [];
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this.loaded = 0;
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}
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PdfDataListener.prototype = {
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append: function PdfDataListener_append(chunk) {
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// In most of the cases we will pass data as we receive it, but at the
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// beginning of the loading we may accumulate some data.
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this.buffers.push(chunk);
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this.loaded += chunk.length;
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if (this.length >= 0 && this.length < this.loaded) {
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this.length = -1; // reset the length, server is giving incorrect one
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}
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this.onprogress(this.loaded, this.length >= 0 ? this.length : void 0);
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},
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readData: function PdfDataListener_readData() {
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if (this.buffers.length === 0) {
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return null;
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}
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if (this.buffers.length === 1) {
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return this.buffers.pop();
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}
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// There are multiple buffers that need to be combined into a single
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// buffer.
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let combinedLength = 0;
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for (let buffer of this.buffers) {
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combinedLength += buffer.length;
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}
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let combinedArray = new Uint8Array(combinedLength);
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let writeOffset = 0;
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while (this.buffers.length) {
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let buffer = this.buffers.shift();
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combinedArray.set(buffer, writeOffset);
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writeOffset += buffer.length;
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}
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return combinedArray;
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},
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finish: function PdfDataListener_finish() {
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this.isDataReady = true;
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if (this.oncompleteCallback) {
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this.oncompleteCallback(this.readData());
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}
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},
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error: function PdfDataListener_error(errorCode) {
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this.errorCode = errorCode;
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if (this.oncompleteCallback) {
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this.oncompleteCallback(null, errorCode);
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}
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},
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onprogress() {},
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get oncomplete() {
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return this.oncompleteCallback;
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},
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set oncomplete(value) {
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this.oncompleteCallback = value;
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if (this.isDataReady) {
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value(this.readData());
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}
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if (this.errorCode) {
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value(null, this.errorCode);
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}
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},
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};
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/**
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* All the privileged actions.
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*/
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class ChromeActions {
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constructor(domWindow, contentDispositionFilename) {
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this.domWindow = domWindow;
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this.contentDispositionFilename = contentDispositionFilename;
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this.telemetryState = {
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documentInfo: false,
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firstPageInfo: false,
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streamTypesUsed: [],
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fontTypesUsed: [],
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startAt: Date.now(),
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};
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}
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isInPrivateBrowsing() {
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return PrivateBrowsingUtils.isContentWindowPrivate(this.domWindow);
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}
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download(data, sendResponse) {
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var self = this;
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var originalUrl = data.originalUrl;
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var blobUrl = data.blobUrl || originalUrl;
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// The data may not be downloaded so we need just retry getting the pdf with
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// the original url.
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var originalUri = NetUtil.newURI(originalUrl);
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var filename = data.filename;
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if (typeof filename !== "string" ||
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(!/\.pdf$/i.test(filename) && !data.isAttachment)) {
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filename = "document.pdf";
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}
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var blobUri = NetUtil.newURI(blobUrl);
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var extHelperAppSvc =
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Cc["@mozilla.org/uriloader/external-helper-app-service;1"].
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getService(Ci.nsIExternalHelperAppService);
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var docIsPrivate = this.isInPrivateBrowsing();
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var netChannel = NetUtil.newChannel({
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uri: blobUri,
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loadUsingSystemPrincipal: true,
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});
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if ("nsIPrivateBrowsingChannel" in Ci &&
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netChannel instanceof Ci.nsIPrivateBrowsingChannel) {
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netChannel.setPrivate(docIsPrivate);
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}
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NetUtil.asyncFetch(netChannel, function(aInputStream, aResult) {
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if (!Components.isSuccessCode(aResult)) {
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if (sendResponse) {
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sendResponse(true);
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}
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return;
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}
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// Create a nsIInputStreamChannel so we can set the url on the channel
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// so the filename will be correct.
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var channel = Cc["@mozilla.org/network/input-stream-channel;1"].
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createInstance(Ci.nsIInputStreamChannel);
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channel.QueryInterface(Ci.nsIChannel);
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try {
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// contentDisposition/contentDispositionFilename is readonly before FF18
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channel.contentDisposition = Ci.nsIChannel.DISPOSITION_ATTACHMENT;
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if (self.contentDispositionFilename && !data.isAttachment) {
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channel.contentDispositionFilename = self.contentDispositionFilename;
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} else {
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channel.contentDispositionFilename = filename;
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}
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} catch (e) {}
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channel.setURI(originalUri);
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channel.loadInfo = netChannel.loadInfo;
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channel.contentStream = aInputStream;
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if ("nsIPrivateBrowsingChannel" in Ci &&
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channel instanceof Ci.nsIPrivateBrowsingChannel) {
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channel.setPrivate(docIsPrivate);
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}
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var listener = {
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extListener: null,
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onStartRequest(aRequest, aContext) {
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var loadContext = self.domWindow.docShell
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.QueryInterface(Ci.nsILoadContext);
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this.extListener = extHelperAppSvc.doContent(
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(data.isAttachment ? "application/octet-stream" :
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"application/pdf"),
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aRequest, loadContext, false);
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this.extListener.onStartRequest(aRequest, aContext);
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},
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onStopRequest(aRequest, aContext, aStatusCode) {
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if (this.extListener) {
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this.extListener.onStopRequest(aRequest, aContext, aStatusCode);
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}
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// Notify the content code we're done downloading.
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if (sendResponse) {
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sendResponse(false);
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}
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},
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onDataAvailable(aRequest, aContext, aDataInputStream, aOffset, aCount) {
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this.extListener.onDataAvailable(aRequest, aContext, aDataInputStream,
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aOffset, aCount);
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},
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};
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channel.asyncOpen2(listener);
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});
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}
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getLocale() {
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return Services.locale.getRequestedLocale() || "en-US";
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}
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getStrings(data) {
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try {
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// Lazy initialization of localizedStrings
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if (!("localizedStrings" in this)) {
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this.localizedStrings = getLocalizedStrings("viewer.properties");
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}
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var result = this.localizedStrings[data];
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return JSON.stringify(result || null);
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} catch (e) {
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log("Unable to retrieve localized strings: " + e);
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return "null";
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}
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}
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supportsIntegratedFind() {
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// Integrated find is only supported when we're not in a frame
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return this.domWindow.frameElement === null;
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}
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supportsDocumentFonts() {
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var prefBrowser = getIntPref("browser.display.use_document_fonts", 1);
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var prefGfx = getBoolPref("gfx.downloadable_fonts.enabled", true);
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return (!!prefBrowser && prefGfx);
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}
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supportsDocumentColors() {
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return getIntPref("browser.display.document_color_use", 0) !== 2;
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}
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supportedMouseWheelZoomModifierKeys() {
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return {
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ctrlKey: getIntPref("mousewheel.with_control.action", 3) === 3,
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metaKey: getIntPref("mousewheel.with_meta.action", 1) === 3,
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};
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}
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reportTelemetry(data) {
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var probeInfo = JSON.parse(data);
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switch (probeInfo.type) {
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case "documentInfo":
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if (!this.telemetryState.documentInfo) {
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PdfJsTelemetry.onDocumentVersion(probeInfo.version | 0);
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PdfJsTelemetry.onDocumentGenerator(probeInfo.generator | 0);
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if (probeInfo.formType) {
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PdfJsTelemetry.onForm(probeInfo.formType === "acroform");
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}
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this.telemetryState.documentInfo = true;
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}
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break;
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case "pageInfo":
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if (!this.telemetryState.firstPageInfo) {
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var duration = Date.now() - this.telemetryState.startAt;
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PdfJsTelemetry.onTimeToView(duration);
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this.telemetryState.firstPageInfo = true;
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}
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break;
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case "documentStats":
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// documentStats can be called several times for one documents.
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// if stream/font types are reported, trying not to submit the same
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// enumeration value multiple times.
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var documentStats = probeInfo.stats;
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if (!documentStats || typeof documentStats !== "object") {
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break;
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}
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var i, streamTypes = documentStats.streamTypes;
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if (Array.isArray(streamTypes)) {
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var STREAM_TYPE_ID_LIMIT = 20;
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for (i = 0; i < STREAM_TYPE_ID_LIMIT; i++) {
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if (streamTypes[i] &&
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!this.telemetryState.streamTypesUsed[i]) {
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PdfJsTelemetry.onStreamType(i);
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this.telemetryState.streamTypesUsed[i] = true;
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}
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}
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}
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var fontTypes = documentStats.fontTypes;
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if (Array.isArray(fontTypes)) {
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var FONT_TYPE_ID_LIMIT = 20;
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for (i = 0; i < FONT_TYPE_ID_LIMIT; i++) {
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if (fontTypes[i] &&
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!this.telemetryState.fontTypesUsed[i]) {
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PdfJsTelemetry.onFontType(i);
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this.telemetryState.fontTypesUsed[i] = true;
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}
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}
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}
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break;
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case "print":
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PdfJsTelemetry.onPrint();
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break;
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}
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}
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/**
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* @param {Object} args - Object with `featureId` and `url` properties.
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* @param {function} sendResponse - Callback function.
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*/
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fallback(args, sendResponse) {
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var featureId = args.featureId;
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var domWindow = this.domWindow;
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var strings = getLocalizedStrings("chrome.properties");
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var message;
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if (featureId === "forms") {
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message = getLocalizedString(strings, "unsupported_feature_forms");
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} else {
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message = getLocalizedString(strings, "unsupported_feature");
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}
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PdfJsTelemetry.onFallback();
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PdfjsContentUtils.displayWarning(domWindow, message,
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getLocalizedString(strings, "open_with_different_viewer"),
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getLocalizedString(strings, "open_with_different_viewer", "accessKey"));
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let winmm = domWindow.docShell.messageManager;
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winmm.addMessageListener("PDFJS:Child:fallbackDownload",
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function fallbackDownload(msg) {
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let data = msg.data;
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sendResponse(data.download);
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winmm.removeMessageListener("PDFJS:Child:fallbackDownload",
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fallbackDownload);
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});
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}
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updateFindControlState(data) {
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if (!this.supportsIntegratedFind()) {
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return;
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}
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// Verify what we're sending to the findbar.
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var result = data.result;
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var findPrevious = data.findPrevious;
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var findPreviousType = typeof findPrevious;
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if ((typeof result !== "number" || result < 0 || result > 3) ||
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(findPreviousType !== "undefined" && findPreviousType !== "boolean")) {
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return;
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}
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var winmm = this.domWindow.docShell.messageManager;
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winmm.sendAsyncMessage("PDFJS:Parent:updateControlState", data);
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}
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setPreferences(prefs, sendResponse) {
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var defaultBranch = Services.prefs.getDefaultBranch(PREF_PREFIX + ".");
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var numberOfPrefs = 0;
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var prefValue, prefName;
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for (var key in prefs) {
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if (++numberOfPrefs > MAX_NUMBER_OF_PREFS) {
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log("setPreferences - Exceeded the maximum number of preferences " +
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"that is allowed to be set at once.");
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break;
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} else if (!defaultBranch.getPrefType(key)) {
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continue;
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}
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prefValue = prefs[key];
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prefName = (PREF_PREFIX + "." + key);
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switch (typeof prefValue) {
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case "boolean":
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PdfjsContentUtils.setBoolPref(prefName, prefValue);
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break;
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case "number":
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PdfjsContentUtils.setIntPref(prefName, prefValue);
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break;
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case "string":
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if (prefValue.length > MAX_STRING_PREF_LENGTH) {
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log("setPreferences - Exceeded the maximum allowed length " +
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"for a string preference.");
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} else {
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PdfjsContentUtils.setStringPref(prefName, prefValue);
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}
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break;
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}
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}
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if (sendResponse) {
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sendResponse(true);
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}
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}
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getPreferences(prefs, sendResponse) {
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var defaultBranch = Services.prefs.getDefaultBranch(PREF_PREFIX + ".");
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var currentPrefs = {}, numberOfPrefs = 0;
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var prefValue, prefName;
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for (var key in prefs) {
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if (++numberOfPrefs > MAX_NUMBER_OF_PREFS) {
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log("getPreferences - Exceeded the maximum number of preferences " +
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"that is allowed to be fetched at once.");
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break;
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} else if (!defaultBranch.getPrefType(key)) {
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continue;
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}
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prefValue = prefs[key];
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prefName = (PREF_PREFIX + "." + key);
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switch (typeof prefValue) {
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case "boolean":
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currentPrefs[key] = getBoolPref(prefName, prefValue);
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break;
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case "number":
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currentPrefs[key] = getIntPref(prefName, prefValue);
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break;
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case "string":
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currentPrefs[key] = getStringPref(prefName, prefValue);
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break;
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}
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}
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let result = JSON.stringify(currentPrefs);
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if (sendResponse) {
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sendResponse(result);
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}
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return result;
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}
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}
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/**
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* This is for range requests.
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*/
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class RangedChromeActions extends ChromeActions {
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constructor(domWindow, contentDispositionFilename, originalRequest,
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rangeEnabled, streamingEnabled, dataListener) {
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super(domWindow, contentDispositionFilename);
|
|
this.dataListener = dataListener;
|
|
this.originalRequest = originalRequest;
|
|
this.rangeEnabled = rangeEnabled;
|
|
this.streamingEnabled = streamingEnabled;
|
|
|
|
this.pdfUrl = originalRequest.URI.spec;
|
|
this.contentLength = originalRequest.contentLength;
|
|
|
|
// Pass all the headers from the original request through
|
|
var httpHeaderVisitor = {
|
|
headers: {},
|
|
visitHeader(aHeader, aValue) {
|
|
if (aHeader === "Range") {
|
|
// When loading the PDF from cache, firefox seems to set the Range
|
|
// request header to fetch only the unfetched portions of the file
|
|
// (e.g. 'Range: bytes=1024-'). However, we want to set this header
|
|
// manually to fetch the PDF in chunks.
|
|
return;
|
|
}
|
|
this.headers[aHeader] = aValue;
|
|
},
|
|
};
|
|
if (originalRequest.visitRequestHeaders) {
|
|
originalRequest.visitRequestHeaders(httpHeaderVisitor);
|
|
}
|
|
|
|
var self = this;
|
|
var xhr_onreadystatechange = function xhr_onreadystatechange() {
|
|
if (this.readyState === 1) { // LOADING
|
|
var netChannel = this.channel;
|
|
if ("nsIPrivateBrowsingChannel" in Ci &&
|
|
netChannel instanceof Ci.nsIPrivateBrowsingChannel) {
|
|
var docIsPrivate = self.isInPrivateBrowsing();
|
|
netChannel.setPrivate(docIsPrivate);
|
|
}
|
|
}
|
|
};
|
|
var getXhr = function getXhr() {
|
|
var xhr = new XMLHttpRequest();
|
|
xhr.addEventListener("readystatechange", xhr_onreadystatechange);
|
|
return xhr;
|
|
};
|
|
|
|
this.networkManager = new NetworkManager(this.pdfUrl, {
|
|
httpHeaders: httpHeaderVisitor.headers,
|
|
getXhr,
|
|
});
|
|
|
|
// If we are in range request mode, this means we manually issued xhr
|
|
// requests, which we need to abort when we leave the page
|
|
domWindow.addEventListener("unload", function unload(e) {
|
|
domWindow.removeEventListener(e.type, unload);
|
|
self.abortLoading();
|
|
});
|
|
}
|
|
|
|
initPassiveLoading() {
|
|
var data;
|
|
if (!this.streamingEnabled) {
|
|
this.originalRequest.cancel(Cr.NS_BINDING_ABORTED);
|
|
this.originalRequest = null;
|
|
data = this.dataListener.readData();
|
|
this.dataListener = null;
|
|
} else {
|
|
data = this.dataListener.readData();
|
|
|
|
this.dataListener.onprogress = (loaded, total) => {
|
|
this.domWindow.postMessage({
|
|
pdfjsLoadAction: "progressiveRead",
|
|
loaded,
|
|
total,
|
|
chunk: this.dataListener.readData(),
|
|
}, PDF_VIEWER_ORIGIN);
|
|
};
|
|
this.dataListener.oncomplete = () => {
|
|
this.dataListener = null;
|
|
};
|
|
}
|
|
|
|
this.domWindow.postMessage({
|
|
pdfjsLoadAction: "supportsRangedLoading",
|
|
rangeEnabled: this.rangeEnabled,
|
|
streamingEnabled: this.streamingEnabled,
|
|
pdfUrl: this.pdfUrl,
|
|
length: this.contentLength,
|
|
data,
|
|
}, PDF_VIEWER_ORIGIN);
|
|
|
|
return true;
|
|
}
|
|
|
|
requestDataRange(args) {
|
|
if (!this.rangeEnabled) {
|
|
return;
|
|
}
|
|
|
|
var begin = args.begin;
|
|
var end = args.end;
|
|
var domWindow = this.domWindow;
|
|
// TODO(mack): Support error handler. We're not currently not handling
|
|
// errors from chrome code for non-range requests, so this doesn't
|
|
// seem high-pri
|
|
this.networkManager.requestRange(begin, end, {
|
|
onDone: function RangedChromeActions_onDone(aArgs) {
|
|
domWindow.postMessage({
|
|
pdfjsLoadAction: "range",
|
|
begin: aArgs.begin,
|
|
chunk: aArgs.chunk,
|
|
}, PDF_VIEWER_ORIGIN);
|
|
},
|
|
onProgress: function RangedChromeActions_onProgress(evt) {
|
|
domWindow.postMessage({
|
|
pdfjsLoadAction: "rangeProgress",
|
|
loaded: evt.loaded,
|
|
}, PDF_VIEWER_ORIGIN);
|
|
},
|
|
});
|
|
}
|
|
|
|
abortLoading() {
|
|
this.networkManager.abortAllRequests();
|
|
if (this.originalRequest) {
|
|
this.originalRequest.cancel(Cr.NS_BINDING_ABORTED);
|
|
this.originalRequest = null;
|
|
}
|
|
this.dataListener = null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This is for a single network stream.
|
|
*/
|
|
class StandardChromeActions extends ChromeActions {
|
|
constructor(domWindow, contentDispositionFilename, originalRequest,
|
|
dataListener) {
|
|
super(domWindow, contentDispositionFilename);
|
|
this.originalRequest = originalRequest;
|
|
this.dataListener = dataListener;
|
|
}
|
|
|
|
initPassiveLoading() {
|
|
if (!this.dataListener) {
|
|
return false;
|
|
}
|
|
|
|
this.dataListener.onprogress = (loaded, total) => {
|
|
this.domWindow.postMessage({
|
|
pdfjsLoadAction: "progress",
|
|
loaded,
|
|
total,
|
|
}, PDF_VIEWER_ORIGIN);
|
|
};
|
|
|
|
this.dataListener.oncomplete = (data, errorCode) => {
|
|
this.domWindow.postMessage({
|
|
pdfjsLoadAction: "complete",
|
|
data,
|
|
errorCode,
|
|
}, PDF_VIEWER_ORIGIN);
|
|
|
|
this.dataListener = null;
|
|
this.originalRequest = null;
|
|
};
|
|
|
|
return true;
|
|
}
|
|
|
|
abortLoading() {
|
|
if (this.originalRequest) {
|
|
this.originalRequest.cancel(Cr.NS_BINDING_ABORTED);
|
|
this.originalRequest = null;
|
|
}
|
|
this.dataListener = null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Event listener to trigger chrome privileged code.
|
|
*/
|
|
class RequestListener {
|
|
constructor(actions) {
|
|
this.actions = actions;
|
|
}
|
|
|
|
// Receive an event and synchronously or asynchronously responds.
|
|
receive(event) {
|
|
var message = event.target;
|
|
var doc = message.ownerDocument;
|
|
var action = event.detail.action;
|
|
var data = event.detail.data;
|
|
var sync = event.detail.sync;
|
|
var actions = this.actions;
|
|
if (!(action in actions)) {
|
|
log("Unknown action: " + action);
|
|
return;
|
|
}
|
|
var response;
|
|
if (sync) {
|
|
response = actions[action].call(this.actions, data);
|
|
event.detail.response = Cu.cloneInto(response, doc.defaultView);
|
|
} else {
|
|
if (!event.detail.responseExpected) {
|
|
doc.documentElement.removeChild(message);
|
|
response = null;
|
|
} else {
|
|
response = function sendResponse(aResponse) {
|
|
try {
|
|
var listener = doc.createEvent("CustomEvent");
|
|
let detail = Cu.cloneInto({ response: aResponse, },
|
|
doc.defaultView);
|
|
listener.initCustomEvent("pdf.js.response", true, false, detail);
|
|
return message.dispatchEvent(listener);
|
|
} catch (e) {
|
|
// doc is no longer accessible because the requestor is already
|
|
// gone. unloaded content cannot receive the response anyway.
|
|
return false;
|
|
}
|
|
};
|
|
}
|
|
actions[action].call(this.actions, data, response);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Forwards events from the eventElement to the contentWindow only if the
|
|
* content window matches the currently selected browser window.
|
|
*/
|
|
class FindEventManager {
|
|
constructor(contentWindow) {
|
|
this.contentWindow = contentWindow;
|
|
this.winmm = contentWindow.docShell.messageManager;
|
|
}
|
|
|
|
bind() {
|
|
var unload = (evt) => {
|
|
this.unbind();
|
|
this.contentWindow.removeEventListener(evt.type, unload);
|
|
};
|
|
this.contentWindow.addEventListener("unload", unload);
|
|
|
|
// We cannot directly attach listeners to for the find events
|
|
// since the FindBar is in the parent process. Instead we're
|
|
// asking the PdfjsChromeUtils to do it for us and forward
|
|
// all the find events to us.
|
|
this.winmm.sendAsyncMessage("PDFJS:Parent:addEventListener");
|
|
this.winmm.addMessageListener("PDFJS:Child:handleEvent", this);
|
|
}
|
|
|
|
receiveMessage(msg) {
|
|
var detail = msg.data.detail;
|
|
var type = msg.data.type;
|
|
var contentWindow = this.contentWindow;
|
|
|
|
detail = Cu.cloneInto(detail, contentWindow);
|
|
var forward = contentWindow.document.createEvent("CustomEvent");
|
|
forward.initCustomEvent(type, true, true, detail);
|
|
contentWindow.dispatchEvent(forward);
|
|
}
|
|
|
|
unbind() {
|
|
this.winmm.sendAsyncMessage("PDFJS:Parent:removeEventListener");
|
|
}
|
|
}
|
|
|
|
function PdfStreamConverter() {
|
|
}
|
|
|
|
PdfStreamConverter.prototype = {
|
|
QueryInterface: ChromeUtils.generateQI([Ci.nsIStreamConverter, Ci.nsIStreamListener, Ci.nsIRequestObserver]),
|
|
|
|
/*
|
|
* This component works as such:
|
|
* 1. asyncConvertData stores the listener
|
|
* 2. onStartRequest creates a new channel, streams the viewer
|
|
* 3. If range requests are supported:
|
|
* 3.1. Leave the request open until the viewer is ready to switch to
|
|
* range requests.
|
|
*
|
|
* If range rquests are not supported:
|
|
* 3.1. Read the stream as it's loaded in onDataAvailable to send
|
|
* to the viewer
|
|
*
|
|
* The convert function just returns the stream, it's just the synchronous
|
|
* version of asyncConvertData.
|
|
*/
|
|
|
|
// nsIStreamConverter::convert
|
|
convert(aFromStream, aFromType, aToType, aCtxt) {
|
|
throw Cr.NS_ERROR_NOT_IMPLEMENTED;
|
|
},
|
|
|
|
// nsIStreamConverter::asyncConvertData
|
|
asyncConvertData(aFromType, aToType, aListener, aCtxt) {
|
|
// Store the listener passed to us
|
|
this.listener = aListener;
|
|
},
|
|
|
|
// nsIStreamListener::onDataAvailable
|
|
onDataAvailable(aRequest, aContext, aInputStream, aOffset, aCount) {
|
|
if (!this.dataListener) {
|
|
return;
|
|
}
|
|
|
|
var binaryStream = this.binaryStream;
|
|
binaryStream.setInputStream(aInputStream);
|
|
let chunk = new ArrayBuffer(aCount);
|
|
binaryStream.readArrayBuffer(aCount, chunk);
|
|
this.dataListener.append(new Uint8Array(chunk));
|
|
},
|
|
|
|
// nsIRequestObserver::onStartRequest
|
|
onStartRequest(aRequest, aContext) {
|
|
// Setup the request so we can use it below.
|
|
var isHttpRequest = false;
|
|
try {
|
|
aRequest.QueryInterface(Ci.nsIHttpChannel);
|
|
isHttpRequest = true;
|
|
} catch (e) {}
|
|
|
|
var rangeRequest = false;
|
|
var streamRequest = false;
|
|
if (isHttpRequest) {
|
|
var contentEncoding = "identity";
|
|
try {
|
|
contentEncoding = aRequest.getResponseHeader("Content-Encoding");
|
|
} catch (e) {}
|
|
|
|
var acceptRanges;
|
|
try {
|
|
acceptRanges = aRequest.getResponseHeader("Accept-Ranges");
|
|
} catch (e) {}
|
|
|
|
var hash = aRequest.URI.ref;
|
|
var isPDFBugEnabled = getBoolPref(PREF_PREFIX + ".pdfBugEnabled", false);
|
|
rangeRequest = contentEncoding === "identity" &&
|
|
acceptRanges === "bytes" &&
|
|
aRequest.contentLength >= 0 &&
|
|
!getBoolPref(PREF_PREFIX + ".disableRange", false) &&
|
|
(!isPDFBugEnabled ||
|
|
!hash.toLowerCase().includes("disablerange=true"));
|
|
streamRequest = contentEncoding === "identity" &&
|
|
aRequest.contentLength >= 0 &&
|
|
!getBoolPref(PREF_PREFIX + ".disableStream", false) &&
|
|
(!isPDFBugEnabled ||
|
|
!hash.toLowerCase().includes("disablestream=true"));
|
|
}
|
|
|
|
aRequest.QueryInterface(Ci.nsIChannel);
|
|
|
|
aRequest.QueryInterface(Ci.nsIWritablePropertyBag);
|
|
|
|
var contentDispositionFilename;
|
|
try {
|
|
contentDispositionFilename = aRequest.contentDispositionFilename;
|
|
} catch (e) {}
|
|
|
|
// Change the content type so we don't get stuck in a loop.
|
|
aRequest.setProperty("contentType", aRequest.contentType);
|
|
aRequest.contentType = "text/html";
|
|
if (isHttpRequest) {
|
|
// We trust PDF viewer, using no CSP
|
|
aRequest.setResponseHeader("Content-Security-Policy", "", false);
|
|
aRequest.setResponseHeader("Content-Security-Policy-Report-Only", "",
|
|
false);
|
|
// The viewer does not need to handle HTTP Refresh header.
|
|
aRequest.setResponseHeader("Refresh", "", false);
|
|
}
|
|
|
|
PdfJsTelemetry.onViewerIsUsed();
|
|
PdfJsTelemetry.onDocumentSize(aRequest.contentLength);
|
|
|
|
// Creating storage for PDF data
|
|
var contentLength = aRequest.contentLength;
|
|
this.dataListener = new PdfDataListener(contentLength);
|
|
this.binaryStream = Cc["@mozilla.org/binaryinputstream;1"]
|
|
.createInstance(Ci.nsIBinaryInputStream);
|
|
|
|
// Create a new channel that is viewer loaded as a resource.
|
|
var channel = NetUtil.newChannel({
|
|
uri: PDF_VIEWER_WEB_PAGE,
|
|
loadUsingSystemPrincipal: true,
|
|
});
|
|
|
|
var listener = this.listener;
|
|
var dataListener = this.dataListener;
|
|
// Proxy all the request observer calls, when it gets to onStopRequest
|
|
// we can get the dom window. We also intentionally pass on the original
|
|
// request(aRequest) below so we don't overwrite the original channel and
|
|
// trigger an assertion.
|
|
var proxy = {
|
|
onStartRequest(request, context) {
|
|
listener.onStartRequest(aRequest, aContext);
|
|
},
|
|
onDataAvailable(request, context, inputStream, offset, count) {
|
|
listener.onDataAvailable(aRequest, aContext, inputStream,
|
|
offset, count);
|
|
},
|
|
onStopRequest(request, context, statusCode) {
|
|
var domWindow = getDOMWindow(channel, resourcePrincipal);
|
|
if (!Components.isSuccessCode(statusCode) || !domWindow) {
|
|
// The request may have been aborted and the document may have been
|
|
// replaced with something that is not PDF.js, abort attaching.
|
|
listener.onStopRequest(aRequest, context, statusCode);
|
|
return;
|
|
}
|
|
var actions;
|
|
if (rangeRequest || streamRequest) {
|
|
actions = new RangedChromeActions(
|
|
domWindow, contentDispositionFilename, aRequest,
|
|
rangeRequest, streamRequest, dataListener);
|
|
} else {
|
|
actions = new StandardChromeActions(
|
|
domWindow, contentDispositionFilename, aRequest, dataListener);
|
|
}
|
|
var requestListener = new RequestListener(actions);
|
|
domWindow.document.addEventListener(PDFJS_EVENT_ID, function(event) {
|
|
requestListener.receive(event);
|
|
}, false, true);
|
|
if (actions.supportsIntegratedFind()) {
|
|
var findEventManager = new FindEventManager(domWindow);
|
|
findEventManager.bind();
|
|
}
|
|
listener.onStopRequest(aRequest, aContext, statusCode);
|
|
|
|
if (domWindow.frameElement) {
|
|
var isObjectEmbed = domWindow.frameElement.tagName !== "IFRAME" ||
|
|
domWindow.frameElement.className === "previewPluginContentFrame";
|
|
PdfJsTelemetry.onEmbed(isObjectEmbed);
|
|
}
|
|
},
|
|
};
|
|
|
|
// Keep the URL the same so the browser sees it as the same.
|
|
channel.originalURI = aRequest.URI;
|
|
channel.loadGroup = aRequest.loadGroup;
|
|
channel.loadInfo.originAttributes = aRequest.loadInfo.originAttributes;
|
|
|
|
// We can use the resource principal when data is fetched by the chrome,
|
|
// e.g. useful for NoScript. Make make sure we reuse the origin attributes
|
|
// from the request channel to keep isolation consistent.
|
|
var uri = NetUtil.newURI(PDF_VIEWER_WEB_PAGE);
|
|
var resourcePrincipal =
|
|
Services.scriptSecurityManager.createCodebasePrincipal(uri,
|
|
aRequest.loadInfo.originAttributes);
|
|
aRequest.owner = resourcePrincipal;
|
|
|
|
channel.asyncOpen2(proxy);
|
|
},
|
|
|
|
// nsIRequestObserver::onStopRequest
|
|
onStopRequest(aRequest, aContext, aStatusCode) {
|
|
if (!this.dataListener) {
|
|
// Do nothing
|
|
return;
|
|
}
|
|
|
|
if (Components.isSuccessCode(aStatusCode)) {
|
|
this.dataListener.finish();
|
|
} else {
|
|
this.dataListener.error(aStatusCode);
|
|
}
|
|
delete this.dataListener;
|
|
delete this.binaryStream;
|
|
},
|
|
};
|
|
|