public class Http2Protocol
extends java.lang.Object
Defines constants as defined in the HTTP/2 specification.
https://tools.ietf.org/html/rfc7540
Modifier and Type | Class and Description |
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static class |
Http2Protocol.ErrorCode |
static class |
Http2Protocol.ErrorCode$ |
static class |
Http2Protocol.Flags$ |
static class |
Http2Protocol.FrameType |
static class |
Http2Protocol.FrameType$ |
static class |
Http2Protocol.SettingIdentifier |
static class |
Http2Protocol.SettingIdentifier$ |
Constructor and Description |
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Http2Protocol() |
Modifier and Type | Method and Description |
---|---|
static org.apache.pekko.util.ByteString |
ClientConnectionPreface()
The client connection preface starts with a sequence of 24 octets,
which in hex notation is:
0x505249202a20485454502f322e300d0a0d0a534d0d0a0d0a
That is, the connection preface starts with the string "PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n".
|
static int |
InitialMaxConcurrentStreams()
Indicates the maximum number of concurrent streams that the sender will allow.
|
static int |
InitialMaxFrameSize()
The initial frame size for both incoming and outgoing frames as defined by the
specification.
|
static int |
InitialMaxHeaderListSize()
This advisory setting informs a peer of the maximum size of header list that the sender is prepared to accept, in octets.
|
static int |
InitialMaxHeaderTableSize()
Initial maximum size of the header compression table used to decode header blocks, in octets.
|
static int |
InitialWindowSize()
The initial window size for both new streams and the overall connection
as defined by the specification.
|
static int |
MaxFrameSize()
Maximum frame size that can be written.
|
static int |
MinFrameSize()
Minimum frame size that can be written.
|
static int |
NoStreamId()
The stream id to be used for frames not associated with any individual stream
as defined by the specification.
|
static boolean |
PushPromiseEnabledDefault() |
public static final int InitialMaxConcurrentStreams()
A value of 0 for SETTINGS_MAX_CONCURRENT_STREAMS SHOULD NOT be treated as special by endpoints. A zero value does prevent the creation of new streams; however, this can also happen for any limit that is exhausted with active streams. Servers SHOULD only set a zero value for short durations; if a server does not wish to accept requests, closing the connection is more appropriate.
public static final int InitialWindowSize()
See https://tools.ietf.org/html/rfc7540#section-5.2.1: 4. The initial value for the flow-control window is 65,535 octets for both new streams and the overall connection.
public static final int InitialMaxFrameSize()
The frame size can be changed by changing SETTINGS_MAX_FRAME_SIZE.
See https://tools.ietf.org/html/rfc7540#section-6.5.2:
SETTINGS_MAX_FRAME_SIZE (0x5): Indicates the size of the largest frame payload that the sender is willing to receive, in octets.
The initial value is 2^14 (16,384) octets. The value advertised by an endpoint MUST be between this initial value and the maximum allowed frame size (2^24-1 or 16,777,215 octets), inclusive. Values outside this range MUST be treated as a connection error (Section 5.4.1) of type PROTOCOL_ERROR.
public static final int MinFrameSize()
See http://httpwg.org/specs/rfc7540.html#rfc.section.4.2
The size of a frame payload is limited by the maximum size that a receiver advertises in the SETTINGS_MAX_FRAME_SIZE setting. This setting can have any value between 2^14^ (16,384) and 2^24^-1 (16,777,215) octets, inclusive.
public static final int MaxFrameSize()
See http://httpwg.org/specs/rfc7540.html#rfc.section.4.2
The size of a frame payload is limited by the maximum size that a receiver advertises in the SETTINGS_MAX_FRAME_SIZE setting. This setting can have any value between 2^14^ (16,384) and 2^24^-1 (16,777,215) octets, inclusive.
public static final int InitialMaxHeaderTableSize()
See http://httpwg.org/specs/rfc7540.html#SettingValues
public static final int InitialMaxHeaderListSize()
The value is based on the uncompressed size of header fields, including the length of the name and value in octets plus an overhead of 32 octets for each header field. For any given request, a lower limit than what is advertised MAY be enforced.
See http://httpwg.org/specs/rfc7540.html#SettingValues
public static final int NoStreamId()
See https://tools.ietf.org/html/rfc7540#section-4.1:
Stream Identifier: A stream identifier (see Section 5.1.1) expressed as an unsigned 31-bit integer. The value 0x0 is reserved for frames that are associated with the connection as a whole as opposed to an individual stream.
public static final boolean PushPromiseEnabledDefault()
public static org.apache.pekko.util.ByteString ClientConnectionPreface()
0x505249202a20485454502f322e300d0a0d0a534d0d0a0d0a
That is, the connection preface starts with the string "PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n".