View Detailed HTTP Headers

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View Detailed HTTP Headers

Oct 03, 07

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HTTP Headers

HTTP Header Name	Header Description	Example HTTP Header
Accept	Content-Types that are acceptable	`Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,/;q=0.5`
Accept-Charset	Character sets that are acceptable	`Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7`
Accept-Encoding	Acceptable encodings	`Accept-Encoding: gzip,deflate`
Accept-Language	Acceptable languages for response	`Accept-Language: en-us,en`
Accept-Ranges	What partial content range types this server supports	`Accept-Ranges: bytes`
Age	The age the object has been in a proxy cache in seconds	`Age: 7200`
Allow	Valid actions for a specified resource. To be used for a 405 Method not allowed	`Allow: GET,HEAD,POST,OPTIONS,TRACE`
Authorization	Authentication credentials for HTTP authentication	`Authorization: Basic UXNrYXBhggRfoopc5NteWFzcw==`
Cache-Control	Controls how proxies may cache this object	`Cache-Control: max-age=7200, public`
Connection	What type of connection the user-agent would prefer	`Connection: Keep-Alive`
Content-Encoding	The type of encoding used on the data	`Content-Encoding: gzip`
Content-Language	The language the content is in	`Content-Language: en-us`
Content-Length	The length of the content in bytes	`Content-Length: 5356`
Content-Location	An alternate location for the returned data	`Content-Location: /index.html`
Content-MD5	An MD5 sum of the content of the response	`Content-MD5: 1167b9c13ad2b6d3694493fc47976c8`
Content-Range	Where in a full body message this partial message belongs	`Content-Range: bytes 110-2034/2035`
Content-Type	The mime type of this content	`Content-Type: text/html; charset=UTF-8`
Date	The date and time that the message was sent	`Date: Sat, 05 Jan 2008 09:27:35 GMT`
Host	The domain name of the server (for virtual hosting)	`Host: www.askapache.com`
If-Modified-Since	Allows a 304 Not Modified to be returned	`If-Modified-Since: Sat, 05 Jan 2007 09:26:12 GMT`
Last-Modified	The last modified date for the requested object	`Last-Modified: Sat, 05 Jan 2008 09:26:12 GMT`
Location	Used in redirection	`Location: http://www.askapache.com/`
Server	A name for the server	`Server: Apache/2.0.61 (Unix) PHP/4.4.7 mod_ssl/2.0.61 OpenSSL/0.9.7e mod_fastcgi/2.4.2 DAV/2 SVN/1.4.2`
User-Agent	The user agent string of the user agent	`User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.7) Gecko/20070914 Firefox/2.0.0.7`

List of HTTP Response Status Codes

1xx Info / Informational

`HTTP_INFO` – Request received, continuing process.

Indicates a provisional response, consisting only of the Status-Line and optional headers, and is terminated by an empty line.

100 Continue – HTTP_CONTINUE
101 Switching Protocols – HTTP_SWITCHING_PROTOCOLS
102 Processing – HTTP_PROCESSING

2xx Success / OK

`HTTP_SUCCESS` – The action was successfully received, understood, and accepted.

Indicates that the client’s request was successfully received, understood, and accepted.

200 OK – HTTP_OK
201 Created – HTTP_CREATED
202 Accepted – HTTP_ACCEPTED
203 Non-Authoritative Information – HTTP_NON_AUTHORITATIVE
204 No Content – HTTP_NO_CONTENT
205 Reset Content – HTTP_RESET_CONTENT
206 Partial Content – HTTP_PARTIAL_CONTENT
207 Multi-Status – HTTP_MULTI_STATUS

3xx Redirect

`HTTP_REDIRECT` – The client must take additional action to complete the request.

Indicates that further action needs to be taken by the user-agent in order to fulfill the request. The action required may be carried out by the user agent without interaction with the user if and only if the method used in the second request is GET or HEAD. A user agent should not automatically redirect a request more than 5 times, since such redirections usually indicate an infinite loop.

300 Multiple Choices – HTTP_MULTIPLE_CHOICES
301 Moved Permanently – HTTP_MOVED_PERMANENTLY
302 Found – HTTP_MOVED_TEMPORARILY
303 See Other – HTTP_SEE_OTHER
304 Not Modified – HTTP_NOT_MODIFIED
305 Use Proxy – HTTP_USE_PROXY
306 unused – UNUSED
307 Temporary Redirect – HTTP_TEMPORARY_REDIRECT

4xx Client Error

`HTTP_CLIENT_ERROR` – The request contains bad syntax or cannot be fulfilled.

Indicates case where client seems to have erred. Except when responding to a HEAD request, the server should include an entity containing an explanation of the error situation, and whether it is a temporary or permanent condition.

400 Bad Request – HTTP_BAD_REQUEST
401 Authorization Required – HTTP_UNAUTHORIZED
402 Payment Required – HTTP_PAYMENT_REQUIRED
403 Forbidden – HTTP_FORBIDDEN
404 Not Found – HTTP_NOT_FOUND
405 Method Not Allowed – HTTP_METHOD_NOT_ALLOWED
406 Not Acceptable – HTTP_NOT_ACCEPTABLE
407 Proxy Authentication Required – HTTP_PROXY_AUTHENTICATION_REQUIRED
408 Request Time-out – HTTP_REQUEST_TIME_OUT
409 Conflict – HTTP_CONFLICT
410 Gone – HTTP_GONE
411 Length Required – HTTP_LENGTH_REQUIRED
412 Precondition Failed – HTTP_PRECONDITION_FAILED
413 Request Entity Too Large – HTTP_REQUEST_ENTITY_TOO_LARGE
414 Request-URI Too Large – HTTP_REQUEST_URI_TOO_LARGE
415 Unsupported Media Type – HTTP_UNSUPPORTED_MEDIA_TYPE
416 Requested Range Not Satisfiable – HTTP_RANGE_NOT_SATISFIABLE
417 Expectation Failed – HTTP_EXPECTATION_FAILED
418 unused – UNUSED
419 unused – UNUSED
420 unused – UNUSED
421 unused – UNUSED
422 Unprocessable Entity – HTTP_UNPROCESSABLE_ENTITY
423 Locked – HTTP_LOCKED
424 Failed Dependency – HTTP_FAILED_DEPENDENCY
425 No code – HTTP_NO_CODE
426 Upgrade Required – HTTP_UPGRADE_REQUIRED

5xx Server Error

`HTTP_SERVER_ERROR` – The server failed to fulfill an apparently valid request.

Indicate cases in which the server is aware that it has erred or is incapable of performing the request. Except when responding to a HEAD request, the server should include an entity containing an explanation of the error situation, and whether it is a temporary or permanent condition. User agents should display any included entity to the user. These response codes are applicable to any request method.

500 Internal Server Error – HTTP_INTERNAL_SERVER_ERROR
501 Method Not Implemented – HTTP_NOT_IMPLEMENTED
502 Bad Gateway – HTTP_BAD_GATEWAY
503 Service Temporarily Unavailable – HTTP_SERVICE_UNAVAILABLE
504 Gateway Time-out – HTTP_GATEWAY_TIME_OUT
505 HTTP Version Not Supported – HTTP_VERSION_NOT_SUPPORTED
506 Variant Also Negotiates – HTTP_VARIANT_ALSO_VARIES
507 Insufficient Storage – HTTP_INSUFFICIENT_STORAGE
508 unused – UNUSED
509 unused – UNUSED
510 Not Extended – HTTP_NOT_EXTENDED

Helpful HTTP Links

DRP: “The HTTP Distribution and Replication Protocol”
DupSup: “Duplicate Suppression in HTTP”
EARL Schema: “Evaluation and Report Language (EARL) 1.0 Schema”
EDD: “An exploration of dynamic documents”
EdgeArch: “Edge Architecture Specification”
HttpClient: Jakarta Commons HttpClient
HTML4: “HTML 4.01 Specification”
JEPI: “White Paper: Joint Electronic Payment Initiative”
ObjectHeaders: “Object Header lines in HTTP”
OPS-OverHTTP: “Implementation of OPS Over HTTP”
OPTIONS messages: “Specification of HTTP/1.1 OPTIONS messages”
P3P: “The Platform for Privacy Preferences 1.0 (P3P1.0) Specification”
PEP: “PEP – an Extension Mechanism for HTTP”
PICSLabels: “PICS Label Distribution Label Syntax and Communication Protocols, Version 1.1″
Proxy Notification: “Notification for Proxy Caches”
RDF: “Resource Description Framework (RDF): Concepts and Abstract Syntax”
RDF-PRIMER: RDF Primer
RFC2068: “Hypertext Transfer Protocol — HTTP/1.1″
RFC2109: “HTTP State Management Mechanism”
RFC2183: “Communicating Presentation Information in Internet Messages: The Content-Disposition Header Field”
RFC2227: “Simple Hit-Metering and Usage-Limiting for HTTP”
RFC2295: “Transparent Content Negotiation in HTTP”
RFC2310: “The Safe Response Header Field”
RFC2324: “Hyper Text Coffee Pot Control Protocol (HTCPCP/1.0)”
RFC2397: “The ‘data’ URL scheme”
RFC2518: “HTTP Extensions for Distributed Authoring — WEBDAV”
RFC2616: “Hypertext Transfer Protocol — HTTP/1.1″
RFC2617: “HTTP Authentication: Basic and Digest Access Authentication”
RFC2660: “The Secure HyperText Transfer Protocol”
RFC2774: “An HTTP Extension Framework”
RFC2965: “HTTP State Management Mechanism”
RFC3229: “Delta encoding in HTTP”
RFC3230: “Instance Digests in HTTP”
RFC3253: “Versioning Extensions to WebDAV (Web Distributed Authoring and Versioning)”
RFC3648: “Web Distributed Authoring and Versioning (WebDAV) Ordered Collections Protocol”
RFC3986: “Uniform Resource Identifier (URI): Generic Syntax”
RFC4229: “HTTP Header Field Registrations”
SOAP1.1: “Simple Object Access Protocol (SOAP) 1.1″
UA Attributes: “User-Agent Display Attributes Headers”
WIRE: “WIRE – W3 Identifier Resolution Extensions”

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View Detailed HTTP Headers