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 #include "net/socket/ssl_client_socket.h"
  11 #include "net/ssl/ssl_config.h"
  12
  13 namespace net {
  14
  15 const char kAlternateProtocolHeader[] = "Alternate-Protocol";
  16
  17 namespace {
  18
  19 // The order of these strings much match the order of the enum definition
  20 // for AlternateProtocol.
  21 const char* const kAlternateProtocolStrings[] = {
  22     "npn-spdy/2",
  23     "npn-spdy/3",
  24     "npn-spdy/3.1",
  25     "npn-h2-14",  // HTTP/2 draft-14. Called SPDY4 internally.
  26     "npn-h2",
  27     "quic"};
  28
  29 static_assert(arraysize(kAlternateProtocolStrings) ==
  30                   NUM_VALID_ALTERNATE_PROTOCOLS,
  31               "kAlternateProtocolStrings has incorrect size");
  32
  33 }  // namespace
  34
  35 void HistogramAlternateProtocolUsage(AlternateProtocolUsage usage) {
  36   UMA_HISTOGRAM_ENUMERATION("Net.AlternateProtocolUsage", usage,
  37                             ALTERNATE_PROTOCOL_USAGE_MAX);
  38 }
  39
  40 void HistogramBrokenAlternateProtocolLocation(
  41     BrokenAlternateProtocolLocation location){
  42   UMA_HISTOGRAM_ENUMERATION("Net.AlternateProtocolBrokenLocation", location,
  43                             BROKEN_ALTERNATE_PROTOCOL_LOCATION_MAX);
  44 }
  45
  46 bool IsAlternateProtocolValid(AlternateProtocol protocol) {
  47   return protocol >= ALTERNATE_PROTOCOL_MINIMUM_VALID_VERSION &&
  48       protocol <= ALTERNATE_PROTOCOL_MAXIMUM_VALID_VERSION;
  49 }
  50
  51 const char* AlternateProtocolToString(AlternateProtocol protocol) {
  52   switch (protocol) {
  53     case DEPRECATED_NPN_SPDY_2:
  54     case NPN_SPDY_3:
  55     case NPN_SPDY_3_1:
  56     case NPN_SPDY_4_14:
  57     case NPN_SPDY_4:
  58     case QUIC:
  59       DCHECK(IsAlternateProtocolValid(protocol));
  60       return kAlternateProtocolStrings[
  61           protocol - ALTERNATE_PROTOCOL_MINIMUM_VALID_VERSION];
  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   return UNINITIALIZED_ALTERNATE_PROTOCOL;
  77 }
  78
  79 AlternateProtocol AlternateProtocolFromNextProto(NextProto next_proto) {
  80   switch (next_proto) {
  81     case kProtoDeprecatedSPDY2:
  82       return DEPRECATED_NPN_SPDY_2;
  83     case kProtoSPDY3:
  84       return NPN_SPDY_3;
  85     case kProtoSPDY31:
  86       return NPN_SPDY_3_1;
  87     case kProtoSPDY4_14:
  88       return NPN_SPDY_4_14;
  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 AlternateProtocolInfo::ToString() const {
 104   return base::StringPrintf("%d:%s p=%f", port,
 105                             AlternateProtocolToString(protocol), probability);
 106 }
 107
 108 // static
 109 void HttpServerProperties::ForceHTTP11(SSLConfig* ssl_config) {
 110   ssl_config->next_protos.clear();
 111   ssl_config->next_protos.push_back(kProtoHTTP11);
 112 }
 113
 114 }  // namespace net