src/net/http/http_server_properties.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "net/http/http_server_properties.h"
   6
   7 #include "base/logging.h"
   8 #include "base/metrics/histogram.h"
   9 #include "base/strings/stringprintf.h"
  10
  11 namespace net {
  12
  13 const char kAlternateProtocolHeader[] = "Alternate-Protocol";
  14
  15 namespace {
  16
  17 // The order of these strings much match the order of the enum definition
  18 // for AlternateProtocol.
  19 const char* const kAlternateProtocolStrings[] = {
  20   "npn-spdy/2",
  21   "npn-spdy/3",
  22   "npn-spdy/3.1",
  23   "npn-h2-11",  // HTTP/2 draft 11. Called SPDY4 internally.
  24   "quic"
  25 };
  26 const char kBrokenAlternateProtocol[] = "Broken";
  27
  28 COMPILE_ASSERT(
  29     arraysize(kAlternateProtocolStrings) == NUM_VALID_ALTERNATE_PROTOCOLS,
  30     kAlternateProtocolStringsSize_kNumValidAlternateProtocols_not_equal);
  31
  32 }  // namespace
  33
  34 void HistogramAlternateProtocolUsage(AlternateProtocolUsage usage) {
  35   UMA_HISTOGRAM_ENUMERATION("Net.AlternateProtocolUsage", usage,
  36                             ALTERNATE_PROTOCOL_USAGE_MAX);
  37 }
  38
  39 void HistogramBrokenAlternateProtocolLocation(
  40     BrokenAlternateProtocolLocation location){
  41   UMA_HISTOGRAM_ENUMERATION("Net.AlternateProtocolBrokenLocation", location,
  42                             BROKEN_ALTERNATE_PROTOCOL_LOCATION_MAX);
  43 }
  44
  45 bool IsAlternateProtocolValid(AlternateProtocol protocol) {
  46   return protocol >= ALTERNATE_PROTOCOL_MINIMUM_VALID_VERSION &&
  47       protocol <= ALTERNATE_PROTOCOL_MAXIMUM_VALID_VERSION;
  48 }
  49
  50 const char* AlternateProtocolToString(AlternateProtocol protocol) {
  51   switch (protocol) {
  52     case DEPRECATED_NPN_SPDY_2:
  53     case NPN_SPDY_3:
  54     case NPN_SPDY_3_1:
  55     case NPN_SPDY_4:
  56     case QUIC:
  57       DCHECK(IsAlternateProtocolValid(protocol));
  58       return kAlternateProtocolStrings[
  59           protocol - ALTERNATE_PROTOCOL_MINIMUM_VALID_VERSION];
  60     case ALTERNATE_PROTOCOL_BROKEN:
  61       return kBrokenAlternateProtocol;
  62     case UNINITIALIZED_ALTERNATE_PROTOCOL:
  63       return "Uninitialized";
  64   }
  65   NOTREACHED();
  66   return "";
  67 }
  68
  69 AlternateProtocol AlternateProtocolFromString(const std::string& str) {
  70   for (int i = ALTERNATE_PROTOCOL_MINIMUM_VALID_VERSION;
  71        i <= ALTERNATE_PROTOCOL_MAXIMUM_VALID_VERSION; ++i) {
  72     AlternateProtocol protocol = static_cast<AlternateProtocol>(i);
  73     if (str == AlternateProtocolToString(protocol))
  74       return protocol;
  75   }
  76   if (str == kBrokenAlternateProtocol)
  77     return ALTERNATE_PROTOCOL_BROKEN;
  78   return UNINITIALIZED_ALTERNATE_PROTOCOL;
  79 }
  80
  81 AlternateProtocol AlternateProtocolFromNextProto(NextProto next_proto) {
  82   switch (next_proto) {
  83     case kProtoDeprecatedSPDY2:
  84       return DEPRECATED_NPN_SPDY_2;
  85     case kProtoSPDY3:
  86       return NPN_SPDY_3;
  87     case kProtoSPDY31:
  88       return NPN_SPDY_3_1;
  89     case kProtoSPDY4:
  90       return NPN_SPDY_4;
  91     case kProtoQUIC1SPDY3:
  92       return QUIC;
  93
  94     case kProtoUnknown:
  95     case kProtoHTTP11:
  96       break;
  97   }
  98
  99   NOTREACHED() << "Invalid NextProto: " << next_proto;
 100   return UNINITIALIZED_ALTERNATE_PROTOCOL;
 101 }
 102
 103 std::string PortAlternateProtocolPair::ToString() const {
 104   return base::StringPrintf("%d:%s", port,
 105                             AlternateProtocolToString(protocol));
 106 }
 107
 108 }  // namespace net