Internet Assigned Numbers Authority
Hypertext Transfer Protocol (HTTP) Parameters
Last Updated
2024-09-27
Available Formats
[IMG]
XML [IMG]
HTML [IMG]
Plain text
Registries included below
??HTTP Content Coding Registry
??HTTP Transfer Coding Registry
??HTTP Forwarded Parameters
??HTTP Preferences
??HTTP Range Unit Registry
HTTP Content Coding Registry
Registration Procedure(s)
IETF Review
Reference
[RFC9110, Section 16.6.1]
Available Formats
[IMG]
CSV
Name Description Reference Notes
aes128gcm AES-GCM encryption with a 128-bit content encryption [RFC8188]
key
br Brotli Compressed Data Format [RFC7932]
UNIX "compress" data format [Welch, T., "A Technique
compress for High Performance Data Compression", IEEE Computer [RFC9110] Section 8.4.1.1
17(6), June 1984.]
dcb "Dictionary-Compressed Brotli" data format. [RFC-ietf-httpbis-compression-dictionary-19] Section 4
dcz "Dictionary-Compressed Zstandard" data format. [RFC-ietf-httpbis-compression-dictionary-19] Section 5
deflate "deflate" compressed data ([RFC1951]) inside the [RFC9110] Section 8.4.1.2
"zlib" data format ([RFC1950])
exi W3C Efficient XML Interchange [W3C Recommendation: Efficient XML Interchange (EXI) Format]
gzip GZIP file format [RFC1952] [RFC9110] Section 8.4.1.3
identity Reserved [RFC9110] Section 12.5.3
pack200-gzip Network Transfer Format for Java Archives [JSR 200: Network Transfer Format for
Java][Kumar_Srinivasan][John_Rose]
x-compress Deprecated (alias for compress) [RFC9110] Section 8.4.1.1
x-gzip Deprecated (alias for gzip) [RFC9110] Section 8.4.1.3
zstd A stream of bytes compressed using the Zstandard [RFC9659][RFC8878]
protocol with a Window_Size of not more than 8 MB.
HTTP Transfer Coding Registry
Registration Procedure(s)
IETF Review
Reference
[RFC9112, Section 7.3]
Available Formats
[IMG]
CSV
Name Description Reference Notes
chunked Transfer in a series of chunks [RFC9112] Section 7.1
compress UNIX "compress" data format [Welch, T., "A Technique for High Performance Data Compression", IEEE Computer [RFC9112] Section 7.2
17(6), June 1984.]
deflate "deflate" compressed data ([RFC1951]) inside the "zlib" data format ([RFC1950]) [RFC9112] Section 7.2
gzip GZIP file format [RFC1952] [RFC9112] Section 7.2
identity (withdrawn in errata to [RFC2616]) [RFC2616] Section 3.6
trailers (reserved) [RFC9112] Section 12.3
x-compress Deprecated (alias for compress) [RFC9112] Section 7.2
x-gzip Deprecated (alias for gzip) [RFC9112] Section 7.2
HTTP Forwarded Parameters
Registration Procedure(s)
IETF Review
Reference
[RFC7239]
Available Formats
[IMG]
CSV
Name Description Reference Notes
by IP-address of incoming interface of a proxy [RFC7239] Section 5.1
for IP-address of client making a request through a proxy [RFC7239] Section 5.2
host Host header field of the incoming request [RFC7239] Section 5.3
proto Application protocol used for incoming request [RFC7239] Section 5.4
HTTP Preferences
Registration Procedure(s)
Specification Required
Expert(s)
Julian Reschke
Reference
[RFC7240]
Note
Registration requests should be sent to the mailing list described in
[RFC7240]. If approved, designated experts should notify IANA within
two weeks. For assistance, please contact iana@iana.org.
Available Formats
[IMG]
CSV
Preference Value Description Reference
respond-async Indicates that the client prefers that the server [RFC7240], Section
respond asynchronously to a request. 4.1
When the value is "minimal", it indicates that the
client prefers that the server return a minimal
One of either "minimal" or response to a request. When the value is [RFC7240], Section
return "representation" "representation", it indicates that the client 4.2
prefers that the server include a representation of
the current state of the resource in response to a
request.
Indicates an upper bound to the length of time the [RFC7240], Section
wait client expects it will take the server to process 4.3
the request once it has been received.
When value is "strict", it indicates that the
client wishes the server to apply strict validation
and error handling to the processing of a request. [RFC7240], Section
handling One of either "strict" or "lenient" When the value is "lenient", it indicates that the 4.4
client wishes the server to apply lenient
validation and error handling to the processing of
the request.
The "depth-noroot" preference indicates that the
client wishes for the server to exclude the target
(root) resource from processing by the HTTP method
and only apply the HTTP method to the target
resource's subordinate resources. This preference
depth-noroot is only intended to be used with HTTP methods whose [RFC8144], Section 4
definitions explicitly provide support for the
Depth [RFC4918] header field. Furthermore, this
preference only applies when the Depth header field
has a value of "1" or "infinity" (either implicitly
or explicitly).
safe Indicates that safe (i.e., unobjectionable) content [RFC8674]
is preferred.
Indicates that the service is allowed to return
odata.allow-entityreferences references in place of resources that have [OData Version 4.01
previously been returned, with at least the Part 1: Protocol]
properties requested, in the same response.
Requests that the service invoke the specified URL
to signal some service state, such as the
odata.callback completion of an asynchronous result or [OData Version 4.01
availability of new or modified information. The Part 1: Protocol]
service state that triggers the change is dependent
upon the request.
Requests that the service attempt to continue
processing a request that encounters non-fatal
odata.continue-on-error errors, for example in a multi-part request. The [OData Version 4.01
response SHOULD indicate what portions of the Part 1: Protocol]
request were and were not able to be successfully
handled.
Comma-separated list of terms to include
or, when prefixed with a minus sign (-),
exclude from the response. Terms MUST be Specifies the set of annotations the client [OData Version 4.01
odata.include-annotations namespace-qualified and MAY specify just a requests to be included, where applicable, or Part 1: Protocol]
namespace to include or exclude all terms excluded in the response.
within that namespace. The special value
"*" matches all annotations.
A positive integer that represents the Requests that each collection within the response [OData Version 4.01
odata.maxpagesize maximum number of items each collection in contain no more than the number of items specified Part 1: Protocol]
a response SHOULD contain. as the positive integer value of this preference.
One of nulls - properties containing null
values may be omitted from the response Specifies whether a server can omit properties with [OData Version 4.01
omit-values defaults - properties containing the a null value or properties set to their default Part 1: Protocol]
property default value may be omitted from value from a response.
the response.
Requests that the service initiate change tracking [OData Version 4.01
odata.track-changes on the result of this request, according to the Part 1: Protocol]
underlying protocol.
HTTP Range Unit Registry
Registration Procedure(s)
IETF Review
Reference
[RFC9110, Section 16.5.1]
Available Formats
[IMG]
CSV
Name Description Reference Notes
bytes a range of octets [RFC9110] Section 14.1.2
none reserved as keyword to indicate range requests are not supported [RFC9110] Section 14.3
Contact Information
ID Name Contact URI Last Updated
[Kumar_Srinivasan] Kumar Srinivasan mailto:Kumar.Srinivasan&Sun.COM 2006-10-27
[John_Rose] John Rose mailto:John.Rose&Sun.COM 2006-10-27
Licensing Terms
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