| Header |
Description |
Example |
| Accept |
Content-Types that are acceptable |
Accept: text/plain |
| Accept-Charset |
Character sets that are acceptable |
Accept-Charset: iso-8859-5 |
| Accept-Encoding |
Acceptable encodings |
Accept-Encoding: compress, gzip |
| Accept-Language |
Acceptable languages for response |
Accept-Language: da [1] |
| Accept-Ranges |
Allows the server to indicate its acceptance of range requests for a resource |
Accept-Ranges: bytes |
| Authorization |
Authentication credentials for HTTP authentication |
Authorization: Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ== |
| Cache-Control |
Used to specify directives that MUST be obeyed by all caching mechanisms along the request/response chain |
Cache-Control: no-cache |
| Connection |
What type of connection the user-agent would prefer |
Connection: close |
| Cookie |
an HTTP cookie previously sent by the server with Set-Cookie (below) |
Cookie: $Version=1; UserId=JohnDoe |
| Date |
The date and time that the message was sent |
Date: Tue, 15 Nov 1994 08:12:31 GMT |
| Host |
The domain name of the server (for virtual hosting), mandatory since HTTP/1.1 |
Host: en.wikipedia.org |
| 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 |
| If-None-Match |
Allows a 304 Not Modified to be returned if content is unchanged, see HTTP ETag |
If-None-Match: "737060cd8c284d8af7ad3082f209582d" |
| User-Agent |
The user agent string of the user agent |
User-Agent: Mozilla/5.0 (Linux; X11; UTF-8) |
| Header |
Description |
Example |
| 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: 12 |
| Allow |
Valid actions for a specified resource. To be used for a 405 Method not allowed |
Allow: GET, HEAD |
| Cache-Control |
Tells all caching mechanisms from server to client whether they may cache this object |
Cache-Control: no-cache |
| Content-Encoding |
The type of encoding used on the data |
Content-Encoding: gzip |
| Content-Language |
The language the content is in |
Content-Language: da |
| Content-Length |
The length of the response body in bytes |
Content-Length: 348 |
| Content-Location |
An alternate location for the returned data |
Content-Location: /index.htm |
| Content-Disposition |
An opportunity to raise a "File Download" dialogue box for a known MIME type |
Content-Disposition: attachment; filename=fname.ext |
| Content-MD5 |
An MD5 sum of the content of the response |
Content-MD5: 3167b9c13ad2b6d36946493fc47976c8 |
| Content-Range |
Where in a full body message this partial message belongs |
Content-Range: bytes 21010-47021/47022 |
| 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: Tue, 15 Nov 1994 08:12:31 GMT |
| ETag |
An identifier for a specific version of a resource, often a Message Digest, see ETag |
ETag: 737060cd8c284d8af7ad3082f209582d |
| Expires |
Gives the date/time after which the response is considered stale |
Expires: Thu, 01 Dec 1994 16:00:00 GMT |
| Last-Modified |
The last modified date for the requested object, in RFC 2822 format |
Last-Modified: Tue, 15 Nov 1994 12:45:26 GMT |
| Location |
Used in redirection |
Location: http://www.w3.org/pub/WWW/People.html |
| Server |
A name for the server |
Server: Apache/1.3.27 (Unix) (Red-Hat/Linux) |
| Set-Cookie |
an HTTP cookie |
Set-Cookie: UserID=JohnDoe; Max-Age=3600; Version=1 |
