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-h2-14",  // HTTP/2 draft-14. Called SPDY4 internally.
  24   "npn-h2-15",  // HTTP/2 draft-15. Called SPDY4 internally.
  25   "quic"
  26 };
  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_14:
  56     case NPN_SPDY_4_15:
  57     case QUIC:
  58       DCHECK(IsAlternateProtocolValid(protocol));
  59       return kAlternateProtocolStrings[
  60           protocol - ALTERNATE_PROTOCOL_MINIMUM_VALID_VERSION];
  61     case UNINITIALIZED_ALTERNATE_PROTOCOL:
  62       return "Uninitialized";
  63   }
  64   NOTREACHED();
  65   return "";
  66 }
  67
  68 AlternateProtocol AlternateProtocolFromString(const std::string& str) {
  69   for (int i = ALTERNATE_PROTOCOL_MINIMUM_VALID_VERSION;
  70        i <= ALTERNATE_PROTOCOL_MAXIMUM_VALID_VERSION; ++i) {
  71     AlternateProtocol protocol = static_cast<AlternateProtocol>(i);
  72     if (str == AlternateProtocolToString(protocol))
  73       return protocol;
  74   }
  75   return UNINITIALIZED_ALTERNATE_PROTOCOL;
  76 }
  77
  78 AlternateProtocol AlternateProtocolFromNextProto(NextProto next_proto) {
  79   switch (next_proto) {
  80     case kProtoDeprecatedSPDY2:
  81       return DEPRECATED_NPN_SPDY_2;
  82     case kProtoSPDY3:
  83       return NPN_SPDY_3;
  84     case kProtoSPDY31:
  85       return NPN_SPDY_3_1;
  86     case kProtoSPDY4_14:
  87       return NPN_SPDY_4_14;
  88     case kProtoSPDY4_15:
  89       return NPN_SPDY_4_15;
  90     case kProtoQUIC1SPDY3:
  91       return QUIC;
  92
  93     case kProtoUnknown:
  94     case kProtoHTTP11:
  95       break;
  96   }
  97
  98   NOTREACHED() << "Invalid NextProto: " << next_proto;
  99   return UNINITIALIZED_ALTERNATE_PROTOCOL;
 100 }
 101
 102 std::string AlternateProtocolInfo::ToString() const {
 103   return base::StringPrintf("%d:%s p=%f%s", port,
 104                             AlternateProtocolToString(protocol),
 105                             probability,
 106                             is_broken ? " (broken)" : "");
 107 }
 108
 109 }  // namespace net