HTTP status codes

HTTP Status codes

Response Code	category	reason
100	informational	continue
101	informational	switching protocols
102	informational	processing (WebDAV)
200	success	OK
201	success	Created
202	success	Accepted
203	success	Non-authoritative information
204	success	No Content
205	success	Reset Content
206	success	Partial Content
207	success	Multi-Status (WebDAV)
208	success	Already Reported (WebDAV)
300	redirect	Multiple Choices
301	redirect	moved permanently
302	redirect	found
303	redirect	see other
304	redirect	not modified
305	redirect	User Proxy
306	redirect	(unused)
307	redirect	temporary redirect
308	redirect	permanent redirect
400	client error	bad request
401	client error	unauthorised
402	client error	payment required
403	client error	forbidden
404	client error	not found
405	client error	method not allowed
406	client error	not acceptable
407	client error	proxy authentication required
408	client error	request timeout
409	client error	conflict

HTP header fields

standard header fields

Name	Description	Example	Status
A-IM	Acceptable instance-manipulations for the request.	A-IM: feed	Permanent
Accept	Media type(s) that is/are acceptable for the response.	Accept: text/html	Permanent
Accept-Charset	Character sets that are acceptable.	Accept-Charset: utf-8	Permanent
Accept-Datetime	Acceptable version in time.	Accept-Datetime: Thu, 31 May 2007 20:35:00 GMT	Provisional
Accept-Encoding	List of acceptable encodings.	Accept-Encoding: gzip, deflate	Permanent
Accept-Language	List of acceptable human languages for response.	Accept-Language: en-US	Permanent
Access-Control-Request-Method	Initiates a request for cross-origin resource sharing with origin-request-header (below).	Access-Control-Request-Method: GET	Template:Nowrap
Authorization	Authentication credentials for HTTP authentication.	Authorization: Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ==	Permanent
Cache-Control	Used to specify directives that must be obeyed by all caching mechanisms along the request-response chain.	Cache-Control: no-cache	Permanent
Connection	Control options for the current connection and list of hop-by-hop request fields. Must not be used with HTTP/2.	Connection: keep-alive Connection: Upgrade	Permanent
Content-Encoding	The type of encoding used on the data.	Content-Encoding: gzip	Permanent
Content-Length	The length of the request body in octets (8-bit bytes).	Content-Length: 348	Permanent
Content-MD5	A Base64-encoded binary MD5 sum of the content of the request body.	Content-MD5: Q2hlY2sgSW50ZWdyaXR5IQ==	Obsolete
Content-Type	The Media type of the body of the request (used with POST and PUT requests).	Content-Type: application/x-www-form-urlencoded	Permanent
Cookie	An HTTP cookie previously sent by the server with set-cookie (below).	Cookie: $Version=1; Skin=new;	Permanent: standard
Date	The date and time at which the message was originated (in "HTTP-date" format as defined by RFC 7231 Date/Time Formats).	Date: Tue, 15 Nov 1994 08:12:31 GMT	Permanent
Expect	Indicates that particular server behaviors are required by the client.	Expect: 100-continue	Permanent
Forwarded	Disclose original information of a client connecting to a web server through an HTTP proxy.	Forwarded: for=192.0.2.60;proto=http;by=203.0.113.43 Forwarded: for=192.0.2.43, for=198.51.100.17	Permanent
From	The email address of the user making the request.	From: user@example.com	Permanent
Host	The domain name of the server (for virtual hosting), and the List of TCP port number on which the server is listening. The Port number may be omitted if the port is the standard port for the service requested. Mandatory since HTTP/1.1. If the request is generated directly in HTTP/2, it should not be used.	Permanent
HTTP2-Settings	A request that upgrades from HTTP/1.1 to HTTP/2 MUST include exactly one HTTP2-Setting header field. The HTTP2-Settings header field is a connection-specific header field that includes parameters that govern the HTTP/2 connection, provided in anticipation of the server accepting the request to upgrade.	HTTP2-Settings: token64	Permanent: standard
If-Match	Only perform the action if the client supplied entity matches the same entity on the server. This is mainly for methods like PUT to only update a resource if it has not been modified since the user last updated it.	If-Match: "737060cd8c284d8af7ad3082f209582d"	Permanent
If-Modified-Since	Allows a 304 Not Modified to be returned if content is unchanged.	If-Modified-Since: Sat, 29 Oct 1994 19:43:31 GMT	Permanent
If-None-Match	Allows a 304 Not Modified to be returned if content is unchanged.	If-None-Match: "737060cd8c284d8af7ad3082f209582d"	Permanent
If-Range	If the entity is unchanged, send me the part(s) that I am missing; otherwise, send me the entire new entity.	If-Range: "737060cd8c284d8af7ad3082f209582d"	Permanent
If-Unmodified-Since	Only send the response if the entity has not been modified since a specific time.	If-Unmodified-Since: Sat, 29 Oct 1994 19:43:31 GMT	Permanent
Max-Forwards	Limit the number of times the message can be forwarded through proxies or gateways.	Max-Forwards: 10	Permanent
Origin	Initiates a request for cross-origin resource sharing (asks server for Access-Control-* response fields).	Origin: http://www.example-social-network.com	Permanent: standard
Pragma	Implementation-specific fields that may have various effects anywhere along the request-response chain.	Pragma: no-cache	Permanent
Proxy-Authorization	Authorization credentials for connecting to a proxy.	Proxy-Authorization: Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ==	Permanent
Range	Request only part of an entity. Bytes are numbered from 0.	Range: bytes=500-999	Permanent
HTTP referer	This is the address of the previous web page from which a link to the currently requested page was followed. (The word "referrer" has been misspelled in the RFC as well as in most implementations to the point that it has become standard usage and is considered correct terminology)	Referer: http://en.wikipedia.org/wiki/Main_Page	Permanent
TE	The transfer encodings the user agent is willing to accept: the same values as for the response header field Transfer-Encoding can be used, plus the "trailers" value (related to the "chunked transfer encoding" transfer method) to notify the server it expects to receive additional fields in the trailer after the last, zero-sized, chunk. Only trailers is supported in HTTP/2.	TE: trailers, deflate	Permanent
Trailer	The Trailer general field value indicates that the given set of header fields is present in the trailer of a message encoded with chunked transfer coding.	Trailer: Max-Forwards	Permanent
Transfer-Encoding	The form of encoding used to safely transfer the entity to the user. Currently defined methods are: chunked transfer encoding, compress, deflate, gzip, identity. Must not be used with HTTP/2.	Transfer-Encoding: chunked	Permanent
User-Agent	The user agent string of the user agent.	User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20100101 Firefox/12.0	Permanent
Upgrade	Ask the server to upgrade to another protocol. Must not be used in HTTP/2.	Upgrade: h2c, HTTPS/1.3, IRC/6.9, RTA/x11, websocket	Permanent
Via	Informs the server of proxies through which the request was sent.	Via: 1.0 fred, 1.1 example.com (Apache/1.1)	Permanent
Warning	A general warning about possible problems with the entity body.	Warning: 199 Miscellaneous warning	Permanent

proxy server header fields

Name	Description
X-Real-IP	mark clients real IP address
X-Forwarded-For	mark origin IP of client connecting to server through a proxy
X-Forwarded-Host	mark origin host of client connection to server through a proxy
X-Forwarded-Port	mark port of client connection to server through a proxy
X-Forwarded-Protocol	mark protocol of client connecting to server through a proxy
X-Powered-By	mark framework of environment etc

See also Well known ports

references

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