Update HTTP/2 ALTSVC wireformat from draft-04 to draft-06.

net/spdy/spdy_alt_svc_wire_format.h

+// Copyright (c) 2015 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.
+
+// This file contains data structures and utility functions used for serializing
+// and parsing alternative service header values, common to HTTP/1.1 header
+// fields and HTTP/2 and QUIC ALTSVC frames.  See specification at
+// https://tools.ietf.org/id/draft-ietf-httpbis-alt-svc-06.html
+
+#ifndef NET_SPDY_SPDY_ALT_SVC_WIRE_FORMAT_H_
+#define NET_SPDY_SPDY_ALT_SVC_WIRE_FORMAT_H_
+
+#include "base/basictypes.h"
+#include "base/strings/string_piece.h"
+#include "net/base/net_export.h"
+
+using base::StringPiece;
+
+namespace net {
+
+namespace test {
+class SpdyAltSvcWireFormatPeer;
+}  // namespace test
+
+class NET_EXPORT_PRIVATE SpdyAltSvcWireFormat {
+ public:
+  friend class test::SpdyAltSvcWireFormatPeer;
+  static bool ParseHeaderFieldValue(StringPiece value,
+                                    std::string* protocol_id,
+                                    std::string* host,
+                                    uint16* port,
+                                    uint32* max_age,
+                                    double* p);
+  static std::string SerializeHeaderFieldValue(const std::string& protocol_id,
+                                               const std::string& host,
+                                               uint16 port,
+                                               uint32 max_age,
+                                               double p);
+
+ private:
+  static void SkipWhiteSpace(StringPiece::const_iterator* c,
+                             StringPiece::const_iterator end);
+  static bool PercentDecode(StringPiece::const_iterator c,
+                            StringPiece::const_iterator end,
+                            std::string* output);
+  static bool ParseAltAuthority(StringPiece::const_iterator c,
+                                StringPiece::const_iterator end,
+                                std::string* host,
+                                uint16* port);
+  static bool ParsePositiveInteger16(StringPiece::const_iterator c,
+                                     StringPiece::const_iterator end,
+                                     uint16* value);
+  static bool ParsePositiveInteger32(StringPiece::const_iterator c,
+                                     StringPiece::const_iterator end,
+                                     uint32* value);
+  static bool ParseProbability(StringPiece::const_iterator c,
+                               StringPiece::const_iterator end,
+                               double* p);
+};
+
+}  // namespace net
+
+#endif  // NET_SPDY_SPDY_ALT_SVC_WIRE_FORMAT_H_