| Request Headers |
Description |
| Accept |
The content types that are acceptable |
| Accept-Charset |
The character sets that are acceptable |
| Accept-Encoding |
The encoding types that are acceptable, used for data
compression |
| Accept-Language |
The languages that are acceptable |
| Authorization |
Authentication credentials for the client session |
| Connection |
Determines if the connection to the server should be persistent |
| Cookie |
A cookie that was previously sent by the server |
| Content-Length |
The length of the request data in bytes |
| Content-MD5 |
A base64 encoded MD5 message digest of the request data |
| Date |
The date and time that the request was made |
| Host |
The host name and optional port number used to connect to the
server |
| If-Modified-Since |
Return a resource only if it has been modified since the
requested date and time |
| If-Unmodified-Since |
Return a resource only if it has not been modified since the
requested date and time |
| Pragma |
Implementation specific header, typically used to control
caching |
| Proxy-Authorization |
Authentication credentials used when connecting through a proxy
server |
| Range |
Request a specific range of bytes from the resource |
| Referer |
The address of the previous document or other resource that
linked to the current document |
| User-Agent |
Identifies the client application that has issued the request |
| Via |
Identifies the proxy server that forwarded the request |
| Response Headers |
Description |
| Accept-Ranges |
Used to indicate if the server accepts returning partial content |
| Age |
The age that a document has been in a proxy cache, in seconds |
| Allow |
A list of methods that are allowed for the specified resource |
| Cache-Control |
How the resource should be cached by the client |
| Connection |
How the connection should be managed |
| Content-Encoding |
The type of encoding used for the data return to the client,
used with compression |
| Content-Language |
The language used in the response to the client |
| Content-Location |
An alternate location for the specified resource |
| Content-MD5 |
A base64 encoded MD5 message digest of the response data |
| Content-Disposition |
Used to indicate that the content being returned is a downloaded
file |
| Content-Range |
The range of bytes returned by the server for partially
downloaded data |
| Content-Type |
The MIME type that identifies the data being returned by the
server |
| Date |
The date and time the response was sent by the server |
| ETag |
A unique identifier for a specific version of a resource,
typically a message digest |
| Expires |
The date and time which the response is considered stale |
| Last-Modified |
The date and time the resource was last modified on the server |
| Location |
The new location of the requested resource, used with
redirection |
| Pragma |
Implementation specific header, typically used to control
caching |
| Retry-After |
The number of seconds the client should wait before trying again
if a resource is unavailable |
| Server |
Identifies the server, typically including the server name,
version and operating system |
| Set-Cookie |
A cookie that should be returned by the client on subsequent
requests to the server |
| Transfer-Encoding |
Encoding method used to transfer the data to the client |
| Via |
Informs the client of the proxy server that the request was sent
through |
| WWW-Authenticate |
The authentication scheme the client should use to access the
resource |