Pass response headers to the PDF plugin

chrome/browser/resources/pdf/pdf.js

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 'use strict';
 
 <include src="../../../../ui/webui/resources/js/util.js">
 <include src="pdf_scripting_api.js">
 <include src="viewport.js">
 
@@ skipping 52 matching lines @@
   // with it. We also send a message indicating that extension has loaded and
   // is ready to receive messages.
   window.addEventListener('message', this.handleScriptingMessage_.bind(this),
                           false);
   this.sendScriptingMessage_({type: 'readyToReceive'});
 
   // If the viewer is started from a MIME type request, there will be a
   // background page and stream details object with the details of the request.
   // Otherwise, we take the query string of the URL to indicate the URL of the
   // PDF to load. This is used for print preview in particular.
-  var streamDetails;
   if (chrome.extension.getBackgroundPage &&
       chrome.extension.getBackgroundPage()) {
-    streamDetails = chrome.extension.getBackgroundPage().popStreamDetails();
+    this.streamDetails =
+        chrome.extension.getBackgroundPage().popStreamDetails();
   }
 
-  if (!streamDetails) {
+  if (!this.streamDetails) {
     // The URL of this page will be of the form
     // "chrome-extension://<extension id>?<pdf url>". We pull out the <pdf url>
     // part here.
     var url = window.location.search.substring(1);
-    streamDetails = {
+    this.streamDetails = {
       streamUrl: url,
-      originalUrl: url
+      originalUrl: url,
+      responseHeaders: ''
     };
   }
 
-  this.plugin_.setAttribute('src', streamDetails.streamUrl);
+  this.plugin_.setAttribute('src', this.streamDetails.originalUrl);
+  this.plugin_.setAttribute('stream-url', this.streamDetails.streamUrl);
+  var headers = '';
+  for (var header in this.streamDetails.responseHeaders) {
+    headers += header + ': ' +

[Lei Zhang, 2014/05/22 00:13:20]

Are we likely to run into any parsing problems with header entries that may
contain ': ' ?

+        this.streamDetails.responseHeaders[header] + '\n';
+  }
+  this.plugin_.setAttribute('headers', headers);
+
   if (window.top == window)
     this.plugin_.setAttribute('full-frame', '');
   document.body.appendChild(this.plugin_);
 
-  this.setupEventListeners_(streamDetails);
+  this.setupEventListeners_();
 }
 
 PDFViewer.prototype = {
   /**
    * @private
    * Sets up event listeners for key shortcuts and also the UI buttons.
-   * @param {Object} streamDetails the details of the original HTTP request for
-   *     the PDF.
    */
-  setupEventListeners_: function(streamDetails) {
+  setupEventListeners_: function() {
     // Setup the button event listeners.
     $('fit-to-width-button').addEventListener('click',
         this.viewport_.fitToWidth.bind(this.viewport_));
     $('fit-to-page-button').addEventListener('click',
         this.viewport_.fitToPage.bind(this.viewport_));
     $('zoom-in-button').addEventListener('click',
         this.viewport_.zoomIn.bind(this.viewport_));
     $('zoom-out-button').addEventListener('click',
         this.viewport_.zoomOut.bind(this.viewport_));
-    $('save-button-link').href = streamDetails.originalUrl;
+    $('save-button-link').href = this.streamDetails.originalUrl;
     $('print-button').addEventListener('click', this.print_.bind(this));
 
     // Setup keyboard event listeners.
     document.onkeydown = function(e) {
       switch (e.keyCode) {
         case 37:  // Left arrow key.
           // Go to the previous page if there are no horizontal scrollbars.
           if (!this.viewport_.documentHasScrollbars().x) {
             this.viewport_.goToPage(this.viewport_.getMostVisiblePage() - 1);
             // Since we do the movement of the page.
@@ skipping 154 matching lines @@
           position.x = message.data.x;
         if (message.data.y != undefined)
           position.y = message.data.y;
         this.viewport_.position = position;
         break;
       case 'setTranslatedStrings':
         this.passwordScreen_.text = message.data.getPasswordString;
         this.progressBar_.text = message.data.loadingString;
         this.errorScreen_.text = message.data.loadFailedString;
         break;
+      case 'cancelStreamUrl':
+        chrome.streamsPrivate.abort(this.streamDetails.streamUrl);
+        break;
     }
   },
 
   /**
    * @private
    * A callback that's called when the viewport changes.
    */
   viewportChangedCallback_: function() {
     if (!this.documentDimensions_)
       return;
@@ skipping 107 matching lines @@
 
   /**
    * @type {Viewport} the viewport of the PDF viewer.
    */
   get viewport() {
     return this.viewport_;
   }
 };
 
 var viewer = new PDFViewer();