Fixing 76356 -- plugin streams don't ask for byte range support, r=gagan, sr=darin

modules/plugin/base/src/nsPluginHostImpl.cpp

@@ -1581,40 +1581,43 @@ nsresult nsPluginStreamListenerPeer::SetUpStreamListener(nsIRequest *request,
     return NS_ERROR_NULL_POINTER;
   
 
-  /*
+  // get httpChannel to retrieve some info we need for nsIPluginStreamInfo setup
-
-   * Assumption
-
-   * By the time nsPluginStreamListenerPeer::OnDataAvailable() gets
-   * called, all the headers have been read.
-
-   */
-
-  nsCOMPtr<nsIHTTPHeaderListener> headerListener = 
-    do_QueryInterface(mPStreamListener);
-  if (headerListener) {
-    
   nsCOMPtr<nsIChannel> channel = do_QueryInterface(request);
   nsCOMPtr<nsIHTTPChannel> httpChannel = do_QueryInterface(channel);
-    if (httpChannel) {
-      ReadHeadersFromChannelAndPostToListener(httpChannel, headerListener);
-    }
-  }
 
+  /*
+   * Assumption
+   * By the time nsPluginStreamListenerPeer::OnDataAvailable() gets
+   * called, all the headers have been read.
+   */
+  nsCOMPtr<nsIHTTPHeaderListener> headerListener = do_QueryInterface(mPStreamListener);
+  if (headerListener && httpChannel) 
+    ReadHeadersFromChannelAndPostToListener(httpChannel, headerListener);
   
   mSetUpListener = PR_TRUE;
-  mPluginStreamInfo->SetSeekable(PR_FALSE);
+  
+  // set seekability
+  PRBool bSeekable = PR_FALSE;
+  if (httpChannel)
+  {
+    nsXPIDLCString range;
+    nsCOMPtr<nsIAtom> header(dont_AddRef(NS_NewAtom("accept-ranges")));
+    if(NS_SUCCEEDED(httpChannel->GetResponseHeader(header, getter_Copies(range))))
+    {
+      if (0 == PL_strcmp(range.get(), "bytes"))
+        bSeekable = PR_TRUE;
+    }
+  }
+  mPluginStreamInfo->SetSeekable(bSeekable);
  
   // get Last-Modified header for plugin info
-  
+  if (httpChannel) 
-  nsCOMPtr<nsIChannel> channel = do_QueryInterface(request);
+  {
-  nsCOMPtr<nsIHTTPChannel>	theHTTPChannel = do_QueryInterface(channel);
-  if (theHTTPChannel) {
     char * lastModified;
     nsCOMPtr<nsIAtom> header(dont_AddRef(NS_NewAtom("last-modified")));
-
+    httpChannel->GetResponseHeader(header, &lastModified);
-     theHTTPChannel->GetResponseHeader(header, &lastModified);
+    if (lastModified) 
-     if (lastModified) {
+    {
       PRTime time64;
       PR_ParseTimeString(lastModified, PR_TRUE, &time64);  //convert string time to interger time
  

modules/plugin/nglsrc/nsPluginHostImpl.cpp

@@ -1581,40 +1581,43 @@ nsresult nsPluginStreamListenerPeer::SetUpStreamListener(nsIRequest *request,
     return NS_ERROR_NULL_POINTER;
   
 
-  /*
+  // get httpChannel to retrieve some info we need for nsIPluginStreamInfo setup
-
-   * Assumption
-
-   * By the time nsPluginStreamListenerPeer::OnDataAvailable() gets
-   * called, all the headers have been read.
-
-   */
-
-  nsCOMPtr<nsIHTTPHeaderListener> headerListener = 
-    do_QueryInterface(mPStreamListener);
-  if (headerListener) {
-    
   nsCOMPtr<nsIChannel> channel = do_QueryInterface(request);
   nsCOMPtr<nsIHTTPChannel> httpChannel = do_QueryInterface(channel);
-    if (httpChannel) {
-      ReadHeadersFromChannelAndPostToListener(httpChannel, headerListener);
-    }
-  }
 
+  /*
+   * Assumption
+   * By the time nsPluginStreamListenerPeer::OnDataAvailable() gets
+   * called, all the headers have been read.
+   */
+  nsCOMPtr<nsIHTTPHeaderListener> headerListener = do_QueryInterface(mPStreamListener);
+  if (headerListener && httpChannel) 
+    ReadHeadersFromChannelAndPostToListener(httpChannel, headerListener);
   
   mSetUpListener = PR_TRUE;
-  mPluginStreamInfo->SetSeekable(PR_FALSE);
+  
+  // set seekability
+  PRBool bSeekable = PR_FALSE;
+  if (httpChannel)
+  {
+    nsXPIDLCString range;
+    nsCOMPtr<nsIAtom> header(dont_AddRef(NS_NewAtom("accept-ranges")));
+    if(NS_SUCCEEDED(httpChannel->GetResponseHeader(header, getter_Copies(range))))
+    {
+      if (0 == PL_strcmp(range.get(), "bytes"))
+        bSeekable = PR_TRUE;
+    }
+  }
+  mPluginStreamInfo->SetSeekable(bSeekable);
  
   // get Last-Modified header for plugin info
-  
+  if (httpChannel) 
-  nsCOMPtr<nsIChannel> channel = do_QueryInterface(request);
+  {
-  nsCOMPtr<nsIHTTPChannel>	theHTTPChannel = do_QueryInterface(channel);
-  if (theHTTPChannel) {
     char * lastModified;
     nsCOMPtr<nsIAtom> header(dont_AddRef(NS_NewAtom("last-modified")));
-
+    httpChannel->GetResponseHeader(header, &lastModified);
-     theHTTPChannel->GetResponseHeader(header, &lastModified);
+    if (lastModified) 
-     if (lastModified) {
+    {
       PRTime time64;
       PR_ParseTimeString(lastModified, PR_TRUE, &time64);  //convert string time to interger time