HTTP response header and request header information tables

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HTTP response header and request header information tables

The HTTP request header provides information about the request, response, or other sending entity. The header information for HTTP includes a common header, a request header, a response header, and an entity header four parts. Each header field consists of a domain name, a colon (:), and a field value of three parts. Universal Headers : Can be used for requests or responses, and is associated with a transaction as a whole rather than a specific resource. Request Headers : Allows the client to pass information about itself and the form of response that it wants. response Header : The server and the response to pass its own information. Entity Header : Defines the information for the transferred resource. Can be used for a request or for a response. According to the above classification of HTTP request header introduction can refer to this article, the tool according to the request and output divided into request and response two parts. HTTP Request Header Header

Header	explain	Sample
Accept	Specify what types of content the client can receive	Accept:text/plain, text/html
Accept-charset	The set of character encodings that the browser can accept.	Accept-charset:iso-8859-5
Accept-encoding	Specifies the type of content compression encoding the Web server that the browser can support.	Accept-encoding:compress, gzip
Accept-language	Language acceptable to the browser	Accept-language:en,zh
Accept-ranges	One or more child scope fields that can request a Web page entity	Accept-ranges:bytes
Authorization	Authorization Certificate for HTTP Authorization	Authorization:basic qwxhzgrpbjpvcgvuihnlc2ftzq==
Cache-control	Specify the caching mechanism that the request and response follow	Cache-control:no-cache
Connection	Indicates whether a persistent connection is required. (HTTP 1.1 defaults to persistent connection)	Connection:close
Cookies	When an HTTP request is sent, it sends all the cookie values saved under the request domain name to the Web server.	Cookie: $Version = 1; Skin=new;
Content-length	Requested length of content	content-length:348
Content-type	Requested MIME information corresponding to the entity	content-type:application/x-www-form-urlencoded
Date	Date and time when the request was sent	Date:tue Nov 08:12:31 GMT
Expect	The specific server behavior that is requested	Expect:100-continue
From	Email from the user who made the request	From:user@email.com
Host	Specify the domain name and port number of the requested server	Host:www.zcmhi.com
If-match	The request content is valid only if it matches the entity	If-match: "737060cd8c284d8af7ad3082f209582d"
If-modified-since	If the requested part is modified after the specified time, the request succeeds and the 304 code is returned without modification	If-modified-since:sat Oct 19:43:31 GMT
If-none-match	If the content does not change returns 304 code, the parameter is the etag which the server sends previously, compares with the server response ETag to judge whether changes	If-none-match: "737060cd8c284d8af7ad3082f209582d"
If-range	If the entity does not change, the server sends the missing part of the client, otherwise the entire entity is sent. Parameter also is ETag	If-range: "737060cd8c284d8af7ad3082f209582d"
If-unmodified-since	Request success only if the entity has not been modified after the specified time	If-unmodified-since:sat Oct 19:43:31 GMT
Max-forwards	Limit the time that information is sent through proxies and gateways	Max-forwards:10
Pragma	Used to contain implementation-specific directives	Pragma:no-cache
Proxy-authorization	Authorization certificate to connect to the agent	Proxy-authorization:basic qwxhzgrpbjpvcgvuihnlc2ftzq==
Range	Request only part of an entity, specify a range	range:bytes=500-999
Referer	The address of the previous page, the current request page followed, that is, the routing	Referer:http://www.zcmhi.com/archives/71.html
TE	The transmission code that the client is willing to accept, and notifies the server to accept the receiving tail header information	te:trailers,deflate;q=0.5
Upgrade	Specify a transport protocol to the server for conversion by the server (if supported)	upgrade:http/2.0, shttp/1.3, irc/6.9, rta/x11
User-agent	The User-agent content contains the user information that made the request	user-agent:mozilla/5.0 (Linux; X11)
Via	Notifies intermediate gateways or proxy server addresses, communication protocols	via:1.0 Fred, 1.1 nowhere.com (apache/1.1)
Warning	Warning information about message entities	warn:199 Miscellaneous Warning

HTTP Responses Header response header

Header	explain	Sample
Accept-ranges	Indicates whether the server supports the specified range request and which type of staging request	Accept-ranges:bytes
Age	Estimated time from the original server to the proxy cache (in seconds, non-negative)	Age:12
Allow	Valid request behavior for a network resource, not allowed to return 405	Allow:get, head.
Cache-control	Tell all caching mechanisms to cache and what type of	Cache-control:no-cache
Content-encoding	The return content compression encoding type supported by the Web server.	Content-encoding:gzip
Content-language	Language of the response body	Content-language:en,zh
Content-length	Length of response body	content-length:348
Content-location	Request another alternate address for a resource to substitute	Content-location:/index.htm
Content-md5	Returns the MD5 checksum value of a resource	content-md5:q2hly2sgsw50zwdyaxr5iq==
Content-range	Byte position in this part of the entire return body	Content-range:bytes 21010-47021/47022
Content-type	Returns the MIME type of the content	content-type:text/html; Charset=utf-8
Date	Time the original server message was issued	Date:tue Nov 08:12:31 GMT
ETag	The current value of the entity label for the request variable	ETag: "737060cd8c284d8af7ad3082f209582d"
Expires	Date and time when the response expired	Expires:thu, Dec 16:00:00 GMT
Last-modified	Request the last modification time of a resource	Last-modified:tue Nov 12:45:26 GMT
Location	Used to redirect the receiver to a location other than the requested URL to complete the request or identify the new resource	Location:http://www.zcmhi.com/archives/94.html
Pragma	Includes implementing a specific instruction that can be applied to any receiver on the response chain	Pragma:no-cache
Proxy-authenticate	It indicates the authentication scheme and the parameters that can be applied to the agent at the URL	Proxy-authenticate:basic
Refresh	Apply to redirect or a new resource is created, redirect after 5 seconds (proposed by Netscape, supported by most browsers)	Refresh:5; Url= http://www.zcmhi.com/archives/94.html
Retry-after	Notifies the client to try again after a specified time if the entity is temporarily undesirable	retry-after:120
Server	Web Server Software Name	server:apache/1.3.27 (Unix) (Red-hat/linux)
Set-cookie	Set HTTP Cookie	Set-cookie:userid=johndoe; max-age=3600; Version=1
Trailer	Indicates that the header field exists at the end of the block-transfer encoding	Trailer:max-forwards
Transfer-encoding	File transfer encoding	Transfer-encoding:chunked
Vary	Tell the downstream agent whether to use a cached response or a request from the original server	Vary: *
Via	Tell where the proxy client response was sent	via:1.0 Fred, 1.1 nowhere.com (apache/1.1)
Warning	Warning an entity of possible problems	warning:199 Miscellaneous Warning
Www-authenticate	Indicates the authorization scheme that the client request entity should use	Www-authenticate:basic