Add GetPluginRefererURL to PPB_URLUtil_Dev interface to get the 'Referer' HTTP header value that wa…

content/renderer/pepper/pepper_plugin_instance_impl.cc

 // Copyright (c) 2012 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.
 
 #include "content/renderer/pepper/pepper_plugin_instance_impl.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
@@ skipping 75 matching lines @@
 #include "skia/ext/platform_canvas.h"
 #include "skia/ext/platform_device.h"
 #include "third_party/WebKit/public/platform/WebGamepads.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/public/platform/WebURL.h"
 #include "third_party/WebKit/public/platform/WebURLError.h"
 #include "third_party/WebKit/public/platform/WebURLRequest.h"
 #include "third_party/WebKit/public/web/WebBindings.h"
 #include "third_party/WebKit/public/web/WebCompositionUnderline.h"
 #include "third_party/WebKit/public/web/WebCursorInfo.h"
+#include "third_party/WebKit/public/web/WebDataSource.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
 #include "third_party/WebKit/public/web/WebElement.h"
 #include "third_party/WebKit/public/web/WebFrame.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "third_party/WebKit/public/web/WebPluginContainer.h"
 #include "third_party/WebKit/public/web/WebPrintParams.h"
 #include "third_party/WebKit/public/web/WebPrintScalingOption.h"
 #include "third_party/WebKit/public/web/WebScopedUserGesture.h"
 #include "third_party/WebKit/public/web/WebSecurityOrigin.h"
 #include "third_party/WebKit/public/web/WebUserGestureIndicator.h"
@@ skipping 2385 matching lines @@
                                                       components);
 }
 
 PP_Var PepperPluginInstanceImpl::GetPluginInstanceURL(
     PP_Instance instance,
     PP_URLComponents_Dev* components) {
   return ppapi::PPB_URLUtil_Shared::GenerateURLReturn(plugin_url_,
                                                       components);
 }
 
+PP_Var PepperPluginInstanceImpl::GetPluginReferrerURL(
+    PP_Instance instance,
+    PP_URLComponents_Dev* components) {
+  WebKit::WebDocument document = container()->element().document();
+  if (!full_frame_)
+    return ppapi::PPB_URLUtil_Shared::GenerateURLReturn(document.url(),

[Tom Sepez, 2013/08/29 20:07:56]

Does this leak info that would have otherwise been hidden, given that referrers
are suppressed for HTTPS to HTTP or HTTPS to HTTPS (different origin) requests?

[bbudge, 2013/09/06 20:35:45]

It's a Dev interface, so can't be used by apps from the web store. It's used
mostly for testing. We might need a note that this shouldn't ever be exposed to
real apps.

Also, it's not proxied to NaCl and likely won't ever be, since the
implementation pulls in suprising things, including ICU.

+                                                        components);
+  WebFrame* frame = document.frame();
+  if (!frame)
+    return PP_MakeUndefined();
+  const WebURLRequest& request = frame->dataSource()->originalRequest();
+  WebString referer = request.httpHeaderField("Referer");
+  if (referer.isEmpty())
+    return PP_MakeUndefined();
+  return ppapi::PPB_URLUtil_Shared::GenerateURLReturn(GURL(referer),
+                                                      components);
+}
+
 PP_ExternalPluginResult PepperPluginInstanceImpl::ResetAsProxied(
     scoped_refptr<PluginModule> module) {
   // Save the original module and switch over to the new one now that this
   // plugin is using the IPC-based proxy.
   original_module_ = module_;
   module_ = module;
 
   // Don't send any messages to the plugin until DidCreate() has finished.
   message_channel_->QueueJavaScriptMessages();
 
@@ skipping 389 matching lines @@
     // Running out-of-process. Initiate an IPC call to notify the plugin
     // process.
     ppapi::proxy::HostDispatcher* dispatcher =
         ppapi::proxy::HostDispatcher::GetForInstance(pp_instance());
     dispatcher->Send(new PpapiMsg_PPPInstance_HandleDocumentLoad(
         ppapi::API_ID_PPP_INSTANCE, pp_instance(), pending_host_id, data));
   }
 }
 
 }  // namespace content