Reload image bypassing the cache

Source/web/ContextMenuClientImpl.cpp

 /*
  * Copyright (C) 2009, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 28 matching lines @@
 #include "core/dom/Document.h"
 #include "core/dom/DocumentMarkerController.h"
 #include "core/editing/Editor.h"
 #include "core/editing/SpellChecker.h"
 #include "core/frame/FrameHost.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/PinchViewport.h"
 #include "core/frame/Settings.h"
 #include "core/html/HTMLAnchorElement.h"
 #include "core/html/HTMLFormElement.h"
+#include "core/html/HTMLImageElement.h"
 #include "core/html/HTMLInputElement.h"
 #include "core/html/HTMLMediaElement.h"
 #include "core/html/HTMLPlugInElement.h"
 #include "core/html/MediaError.h"
 #include "core/layout/HitTestResult.h"
 #include "core/layout/LayoutPart.h"
 #include "core/loader/DocumentLoader.h"
 #include "core/loader/FrameLoader.h"
 #include "core/loader/HistoryItem.h"
 #include "core/page/ContextMenuController.h"
@@ skipping 164 matching lines @@
         data.mediaType = WebContextMenuData::MediaTypeCanvas;
         data.hasImageContents = true;
     } else if (!r.absoluteImageURL().isEmpty()) {
         data.srcURL = r.absoluteImageURL();
         data.mediaType = WebContextMenuData::MediaTypeImage;
         data.mediaFlags |= WebContextMenuData::MediaCanPrint;
 
         // An image can be null for many reasons, like being blocked, no image
         // data received from server yet.
         data.hasImageContents = r.image() && !r.image()->isNull();
+        if (data.hasImageContents) {
+            // We know that if absoluteImageURL() is not empty, then this
+            // is a image element.
+            HTMLImageElement* imageElement = toHTMLImageElement(r.innerNodeOrImageMapImage());
+            // TODO: Change "via" to "chrome-proxy" once the server starts sending lo-fi responses.
+            data.imageChromeProxyResponseHeader = imageElement->imageLoader().image()->response().httpHeaderField("via").utf8().data();

[Nate Chapin, 2015/05/01 18:46:51]

What is "via"? It seems wrong to be digging down into response headers here.

[megjablon, 2015/05/01 19:15:23]

We need a way of telling the context menu that an image was a lo-fi image. The
server sends (or will send soon) the response header "chrome-proxy: q=low" for
lo-fi images. I'm currently using the Data Saver via header until this becomes
available. This lo-fi specific logic definitely needs to be moved out of here.
Can I just surface all the response headers to the context menu?

+        }
     } else if (!r.absoluteMediaURL().isEmpty()) {
         data.srcURL = r.absoluteMediaURL();
 
         // We know that if absoluteMediaURL() is not empty, then this
         // is a media element.
         HTMLMediaElement* mediaElement = toHTMLMediaElement(r.innerNode());
         if (isHTMLVideoElement(*mediaElement))
             data.mediaType = WebContextMenuData::MediaTypeVideo;
         else if (isHTMLAudioElement(*mediaElement))
             data.mediaType = WebContextMenuData::MediaTypeAudio;
@@ skipping 192 matching lines @@
         outputItems[i] = subItems[i];
     subMenuItems.swap(outputItems);
 }
 
 void ContextMenuClientImpl::populateCustomMenuItems(const ContextMenu* defaultMenu, WebContextMenuData* data)
 {
     populateSubMenuItems(defaultMenu->items(), data->customItems);
 }
 
 } // namespace blink