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.
5 #include "net/http/http_server_properties.h"
7 #include "base/logging.h"
8 #include "base/metrics/histogram.h"
9 #include "base/strings/stringprintf.h"
13 const char kAlternateProtocolHeader
[] = "Alternate-Protocol";
17 // The order of these strings much match the order of the enum definition
18 // for AlternateProtocol.
19 const char* const kAlternateProtocolStrings
[] = {
23 "npn-h2-14", // HTTP/2 draft-14. Called SPDY4 internally.
24 "npn-h2-15", // HTTP/2 draft-15. Called SPDY4 internally.
29 arraysize(kAlternateProtocolStrings
) == NUM_VALID_ALTERNATE_PROTOCOLS
,
30 kAlternateProtocolStringsSize_kNumValidAlternateProtocols_not_equal
);
34 void HistogramAlternateProtocolUsage(AlternateProtocolUsage usage
) {
35 UMA_HISTOGRAM_ENUMERATION("Net.AlternateProtocolUsage", usage
,
36 ALTERNATE_PROTOCOL_USAGE_MAX
);
39 void HistogramBrokenAlternateProtocolLocation(
40 BrokenAlternateProtocolLocation location
){
41 UMA_HISTOGRAM_ENUMERATION("Net.AlternateProtocolBrokenLocation", location
,
42 BROKEN_ALTERNATE_PROTOCOL_LOCATION_MAX
);
45 bool IsAlternateProtocolValid(AlternateProtocol protocol
) {
46 return protocol
>= ALTERNATE_PROTOCOL_MINIMUM_VALID_VERSION
&&
47 protocol
<= ALTERNATE_PROTOCOL_MAXIMUM_VALID_VERSION
;
50 const char* AlternateProtocolToString(AlternateProtocol protocol
) {
52 case DEPRECATED_NPN_SPDY_2
:
58 DCHECK(IsAlternateProtocolValid(protocol
));
59 return kAlternateProtocolStrings
[
60 protocol
- ALTERNATE_PROTOCOL_MINIMUM_VALID_VERSION
];
61 case UNINITIALIZED_ALTERNATE_PROTOCOL
:
62 return "Uninitialized";
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
))
75 return UNINITIALIZED_ALTERNATE_PROTOCOL
;
78 AlternateProtocol
AlternateProtocolFromNextProto(NextProto next_proto
) {
80 case kProtoDeprecatedSPDY2
:
81 return DEPRECATED_NPN_SPDY_2
;
90 case kProtoQUIC1SPDY3
:
98 NOTREACHED() << "Invalid NextProto: " << next_proto
;
99 return UNINITIALIZED_ALTERNATE_PROTOCOL
;
102 std::string
AlternateProtocolInfo::ToString() const {
103 return base::StringPrintf("%d:%s p=%f%s", port
,
104 AlternateProtocolToString(protocol
),
106 is_broken
? " (broken)" : "");