Hypertext Transfer Protocol version 2 (HTTP/2) Parameters

Created

  • 2015-02-20

Last Updated

  • 2022-08-17

Available Formats

HTTP/2 Frame Type

Registration Procedure(s)

  • IETF Review or IESG Approval

Reference

Available Formats

Code Frame Type Reference
0x00 DATA RFC 9113, Section 6.1
0x01 HEADERS RFC 9113, Section 6.2
0x02 PRIORITY RFC 9113, Section 6.3
0x03 RST_STREAM RFC 9113, Section 6.4
0x04 SETTINGS RFC 9113, Section 6.5
0x05 PUSH_PROMISE RFC 9113, Section 6.6
0x06 PING RFC 9113, Section 6.7
0x07 GOAWAY RFC 9113, Section 6.8
0x08 WINDOW_UPDATE RFC 9113, Section 6.9
0x09 CONTINUATION RFC 9113, Section 6.10
0x0a ALTSVC RFC 7838, Section 4
0x0b Unassigned
0x0c ORIGIN RFC 8336
0x0d-0x0f Unassigned
0x10 PRIORITY_UPDATE RFC 9218
0x11-0xff Unassigned

HTTP/2 Settings

Registration Procedure(s)

  • Expert Review

Expert(s)

  • Martin Thomson (primary), Julian Reschke (secondary)

Reference

Available Formats

Code Name Initial Value Reference
0x00 Reserved RFC 9113
0x01 HEADER_TABLE_SIZE 4096 RFC 9113, Section 6.5.2
0x02 ENABLE_PUSH 1 RFC 9113, Section 6.5.2
0x03 MAX_CONCURRENT_STREAMS (infinite) RFC 9113, Section 6.5.2
0x04 INITIAL_WINDOW_SIZE 65535 RFC 9113, Section 6.5.2
0x05 MAX_FRAME_SIZE 16384 RFC 9113, Section 6.5.2
0x06 MAX_HEADER_LIST_SIZE (infinite) RFC 9113, Section 6.5.2
0x07 Unassigned
0x08 SETTINGS_ENABLE_CONNECT_PROTOCOL 0 RFC 8441
0x09 SETTINGS_NO_RFC7540_PRIORITIES 0 RFC 9218
0x0a-0x0f Unassigned
0x10 TLS_RENEG_PERMITTED 0x00 MS-HTTP2E; Gabriel_Montenegro
0x11-0x4d43 Unassigned
0x4d44 SETTINGS_ENABLE_METADATA 0 draft-beky-httpbis-metadata-02
0x4d45-0xffff Unassigned

HTTP/2 Error Code

Registration Procedure(s)

  • Expert Review

Expert(s)

  • Martin Thomson (primary), Julian Reschke (secondary)

Reference

Available Formats

Code Name Description Reference
0x00 NO_ERROR Graceful shutdown RFC 9113, Section 7
0x01 PROTOCOL_ERROR Protocol error detected RFC 9113, Section 7
0x02 INTERNAL_ERROR Implementation fault RFC 9113, Section 7
0x03 FLOW_CONTROL_ERROR Flow-control limits exceeded RFC 9113, Section 7
0x04 SETTINGS_TIMEOUT Settings not acknowledged RFC 9113, Section 7
0x05 STREAM_CLOSED Frame received for closed stream RFC 9113, Section 7
0x06 FRAME_SIZE_ERROR Frame size incorrect RFC 9113, Section 7
0x07 REFUSED_STREAM Stream not processed RFC 9113, Section 7
0x08 CANCEL Stream cancelled RFC 9113, Section 7
0x09 COMPRESSION_ERROR Compression state not updated RFC 9113, Section 7
0x0a CONNECT_ERROR TCP connection error for CONNECT method RFC 9113, Section 7
0x0b ENHANCE_YOUR_CALM Processing capacity exceeded RFC 9113, Section 7
0x0c INADEQUATE_SECURITY Negotiated TLS parameters not acceptable RFC 9113, Section 7
0x0d HTTP_1_1_REQUIRED Use HTTP/1.1 for the request RFC 9113, Section 7
0x0e-0xffffffff Unassigned

Contact Information

Name Contact URI Last Updated
Gabriel_Montenegro gabriel.montenegro&microsoft.com 2018-08-02