relnote: add new unused functions for client side of QUIC server push.

net/quic/spdy_utils.cc

 // Copyright (c) 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.
 
 #include "net/quic/spdy_utils.h"
 
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
 #include "net/spdy/spdy_frame_builder.h"
 #include "net/spdy/spdy_framer.h"
 #include "net/spdy/spdy_protocol.h"
+#include "url/gurl.h"
 
 using std::string;
 using std::vector;
 
 namespace net {
 
 // static
 string SpdyUtils::SerializeUncompressedHeaders(const SpdyHeaderBlock& headers) {
   SpdyMajorVersion spdy_version = HTTP2;
 
@@ skipping 72 matching lines @@
       return false;
     }
 
     // TODO(rjshade): Check for other forbidden keys, following the HTTP/2 spec.
   }
 
   DVLOG(1) << "Successfully parsed Trailers.";
   return true;
 }
 
+// static
+string SpdyUtils::GetUrlFromHeaderBlock(const SpdyHeaderBlock& headers) {
+  SpdyHeaderBlock::const_iterator it = headers.find(":scheme");
+  if (it == headers.end())
+    return "";
+  std::string url = it->second.as_string();
+
+  url.append("://");
+
+  it = headers.find(":authority");
+  if (it == headers.end())
+    return "";
+  url.append(it->second.as_string());
+
+  it = headers.find(":path");
+  if (it == headers.end())
+    return "";
+  url.append(it->second.as_string());
+  return url;
+}
+
+// static
+bool SpdyUtils::UrlIsValid(const SpdyHeaderBlock& headers) {
+  string url(GetUrlFromHeaderBlock(headers));
+  return url != "" && GURL(url).is_valid();
+}
+
 }  // namespace net