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39
40#ifndef HTTP2PROTOCOL_P_H
41#define HTTP2PROTOCOL_P_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists for the convenience
48// of the Network Access API. This header file may change from
49// version to version without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include <QtNetwork/qnetworkreply.h>
55#include <QtCore/qloggingcategory.h>
56#include <QtCore/qmetatype.h>
57#include <QtCore/qglobal.h>
58#include <QtCore/qmap.h>
59
60// Different HTTP/2 constants/values as defined by RFC 7540.
61
62QT_BEGIN_NAMESPACE
63
64class QHttpNetworkRequest;
65class QHttp2Configuration;
66class QHttpNetworkReply;
67class QByteArray;
68class QString;
69
70namespace Http2
71{
72
73enum class Settings : quint16
74{
75 HEADER_TABLE_SIZE_ID = 0x1,
76 ENABLE_PUSH_ID = 0x2,
77 MAX_CONCURRENT_STREAMS_ID = 0x3,
78 INITIAL_WINDOW_SIZE_ID = 0x4,
79 MAX_FRAME_SIZE_ID = 0x5,
80 MAX_HEADER_LIST_SIZE_ID = 0x6
81};
82
83enum class FrameType : uchar
84{
85 DATA = 0x0,
86 HEADERS = 0x1,
87 PRIORITY = 0x2,
88 RST_STREAM = 0x3,
89 SETTINGS = 0x4,
90 PUSH_PROMISE = 0x5,
91 PING = 0x6,
92 GOAWAY = 0x7,
93 WINDOW_UPDATE = 0x8,
94 CONTINUATION = 0x9,
95 // ATTENTION: enumerators must be sorted.
96 // We use LAST_FRAME_TYPE to check if
97 // frame type is known, if not - this frame
98 // must be ignored, HTTP/2 5.1).
99 LAST_FRAME_TYPE
100};
101
102enum class FrameFlag : uchar
103{
104 EMPTY = 0x0, // Valid for any frame type.
105 ACK = 0x1, // Valid for PING, SETTINGS
106 END_STREAM = 0x1, // Valid for HEADERS, DATA
107 END_HEADERS = 0x4, // Valid for PUSH_PROMISE, HEADERS,
108 PADDED = 0x8, // Valid for PUSH_PROMISE, HEADERS, DATA
109 PRIORITY = 0x20 // Valid for HEADERS,
110};
111
112Q_DECLARE_FLAGS(FrameFlags, FrameFlag)
113Q_DECLARE_OPERATORS_FOR_FLAGS(FrameFlags)
114
115enum Http2PredefinedParameters
116{
117 // Old-style enum, so we
118 // can use as Http2::frameHeaderSize for example.
119 clientPrefaceLength = 24, // HTTP/2, 3.5
120 connectionStreamID = 0, // HTTP/2, 5.1.1
121 frameHeaderSize = 9, // HTTP/2, 4.1
122
123 // The initial allowed payload size. We would use it as an
124 // upper limit for a frame payload we send, until our peer
125 // updates us with a larger SETTINGS_MAX_FRAME_SIZE.
126
127 // The initial maximum payload size that an HTTP/2 frame
128 // can contain is 16384. It's also the minimal size that
129 // can be advertised via 'SETTINGS' frames. A real frame
130 // can have a payload smaller than 16384.
131 minPayloadLimit = 16384, // HTTP/2 6.5.2
132 // The maximum allowed payload size.
133 maxPayloadSize = (1 << 24) - 1, // HTTP/2 6.5.2
134
135 defaultSessionWindowSize = 65535, // HTTP/2 6.5.2
136 maxConcurrentStreams = 100 // HTTP/2, 6.5.2
137};
138
139// These are ints, const, they have internal linkage, it's ok to have them in
140// headers - no ODR violation.
141const quint32 lastValidStreamID((quint32(1) << 31) - 1); // HTTP/2, 5.1.1
142
143// The default size of 64K is too small and limiting: if we use it, we end up
144// sending WINDOW_UPDATE frames on a stream/session all the time, for each
145// 2 DATE frames of size 16K (also default) we'll send a WINDOW_UPDATE frame
146// for a given stream and have a download speed order of magnitude lower than
147// our own HTTP/1.1 protocol handler. We choose a bigger window size: normally,
148// HTTP/2 servers are not afraid to immediately set it to the possible max,
149// we do the same and split this window size between our concurrent streams.
150const qint32 maxSessionReceiveWindowSize((quint32(1) << 31) - 1);
151const qint32 qtDefaultStreamReceiveWindowSize = maxSessionReceiveWindowSize / maxConcurrentStreams;
152
153struct Frame configurationToSettingsFrame(const QHttp2Configuration &configuration);
154QByteArray settingsFrameToBase64(const Frame &settingsFrame);
155void appendProtocolUpgradeHeaders(const QHttp2Configuration &configuration, QHttpNetworkRequest *request);
156
157extern const Q_AUTOTEST_EXPORT char Http2clientPreface[clientPrefaceLength];
158
159enum class FrameStatus
160{
161 protocolError,
162 sizeError,
163 incompleteFrame,
164 goodFrame
165};
166
167enum Http2Error
168{
169 // Old-style enum to avoid excessive name
170 // qualification ...
171 // NB:
172 // I use the last enumerator to check
173 // that errorCode (quint32) is valid,
174 // so it needs to be the highest-numbered!
175 // HTTP/2 7:
176 HTTP2_NO_ERROR = 0x0,
177 PROTOCOL_ERROR = 0x1,
178 INTERNAL_ERROR = 0x2,
179 FLOW_CONTROL_ERROR = 0x3,
180 SETTINGS_TIMEOUT = 0x4,
181 STREAM_CLOSED = 0x5,
182 FRAME_SIZE_ERROR = 0x6,
183 REFUSE_STREAM = 0x7,
184 CANCEL = 0x8,
185 COMPRESSION_ERROR = 0x9,
186 CONNECT_ERROR = 0xa,
187 ENHANCE_YOUR_CALM = 0xb,
188 INADEQUATE_SECURITY = 0xc,
189 HTTP_1_1_REQUIRED = 0xd
190};
191
192void qt_error(quint32 errorCode, QNetworkReply::NetworkError &error, QString &errorString);
193QString qt_error_string(quint32 errorCode);
194QNetworkReply::NetworkError qt_error(quint32 errorCode);
195bool is_protocol_upgraded(const QHttpNetworkReply &reply);
196
197} // namespace Http2
198
199Q_DECLARE_LOGGING_CATEGORY(QT_HTTP2)
200
201QT_END_NAMESPACE
202
203Q_DECLARE_METATYPE(Http2::Settings)
204
205#endif
206

source code of qtbase/src/network/access/http2/http2protocol_p.h