HttpRequestHeader Enum

Definition

Namespace:

System.Net

Assembly:

System.Net.WebHeaderCollection.dll

The HTTP headers that may be specified in a client request.

public enum class HttpRequestHeader

public enum HttpRequestHeader

type HttpRequestHeader = 

Public Enum HttpRequestHeader

Inheritance

Object

ValueType

Enum

HttpRequestHeader

Fields

Name	Value	Description
CacheControl	0	The Cache-Control header, which specifies directives that must be obeyed by all cache control mechanisms along the request/response chain.
Connection	1	The Connection header, which specifies options that are desired for a particular connection.
Date	2	The Date header, which specifies the date and time at which the request originated.
KeepAlive	3	The Keep-Alive header, which specifies a parameter used into order to maintain a persistent connection.
Pragma	4	The Pragma header, which specifies implementation-specific directives that might apply to any agent along the request/response chain.
Trailer	5	The Trailer header, which specifies the header fields present in the trailer of a message encoded with chunked transfer-coding.
TransferEncoding	6	The Transfer-Encoding header, which specifies what (if any) type of transformation that has been applied to the message body.
Upgrade	7	The Upgrade header, which specifies additional communications protocols that the client supports.
Via	8	The Via header, which specifies intermediate protocols to be used by gateway and proxy agents.
Warning	9	The Warning header, which specifies additional information about that status or transformation of a message that might not be reflected in the message.
Allow	10	The Allow header, which specifies the set of HTTP methods supported.
ContentLength	11	The Content-Length header, which specifies the length, in bytes, of the accompanying body data.
ContentType	12	The Content-Type header, which specifies the MIME type of the accompanying body data.
ContentEncoding	13	The Content-Encoding header, which specifies the encodings that have been applied to the accompanying body data.
ContentLanguage	14	The Content-Language header, which specifies the natural language(s) of the accompanying body data.
ContentLocation	15	The Content-Location header, which specifies a URI from which the accompanying body may be obtained.
ContentMd5	16	The Content-MD5 header, which specifies the MD5 digest of the accompanying body data, for the purpose of providing an end-to-end message integrity check. Due to collision problems with MD5, Microsoft recommends a security model based on SHA256 or better.
ContentRange	17	The Content-Range header, which specifies where in the full body the accompanying partial body data should be applied.
Expires	18	The Expires header, which specifies the date and time after which the accompanying body data should be considered stale.
LastModified	19	The Last-Modified header, which specifies the date and time at which the accompanying body data was last modified.
Accept	20	The Accept header, which specifies the MIME types that are acceptable for the response.
AcceptCharset	21	The Accept-Charset header, which specifies the character sets that are acceptable for the response.
AcceptEncoding	22	The Accept-Encoding header, which specifies the content encodings that are acceptable for the response.
AcceptLanguage	23	The Accept-Language header, which specifies that natural languages that are preferred for the response.
Authorization	24	The Authorization header, which specifies the credentials that the client presents in order to authenticate itself to the server.
Cookie	25	The Cookie header, which specifies cookie data presented to the server.
Expect	26	The Expect header, which specifies particular server behaviors that are required by the client.
From	27	The From header, which specifies an Internet Email address for the human user who controls the requesting user agent.
Host	28	The Host header, which specifies the host name and port number of the resource being requested.
IfMatch	29	The If-Match header, which specifies that the requested operation should be performed only if the client's cached copy of the indicated resource is current.
IfModifiedSince	30	The If-Modified-Since header, which specifies that the requested operation should be performed only if the requested resource has been modified since the indicated date and time.
IfNoneMatch	31	The If-None-Match header, which specifies that the requested operation should be performed only if none of client's cached copies of the indicated resources are current.
IfRange	32	The If-Range header, which specifies that only the specified range of the requested resource should be sent, if the client's cached copy is current.
IfUnmodifiedSince	33	The If-Unmodified-Since header, which specifies that the requested operation should be performed only if the requested resource has not been modified since the indicated date and time.
MaxForwards	34	The Max-Forwards header, which specifies an integer indicating the remaining number of times that this request may be forwarded.
ProxyAuthorization	35	The Proxy-Authorization header, which specifies the credentials that the client presents in order to authenticate itself to a proxy.
Referer	36	The Referer header, which specifies the URI of the resource from which the request URI was obtained.
Range	37	The Range header, which specifies the sub-range(s) of the response that the client requests be returned in lieu of the entire response.
Te	38	The TE header, which specifies the transfer encodings that are acceptable for the response.
Translate	39	The Translate header, a Microsoft extension to the HTTP specification used in conjunction with WebDAV functionality.
UserAgent	40	The User-Agent header, which specifies information about the client agent.

Remarks

The appropriate contents of various headers are described in detail in the HTTP/1.1 specification, available at rfc2616.

See also

• HttpResponseHeader