Contents
[ CGI ]
[ InlineModuleInvocation ]
[ Up ]
|
CGI
The CGI module behaves like the standard demands, except for one speciality: The CGI application always has to send a complete header or none, if it operates
like an HTTP/0.9 server. This means, that if you give header information, you
have to start with a line like "HTTP/1.0 200 OK" to tell the client the error
that has occured. If you don't do so, the client will fail to read the result.
For more information about CGI in general, please refer to the various
descriptions on the internet or in books.
For the advanced programmer who wants to write more complex applications, it is
highly suggested to not use this interface, but to write an AddOn instead.
This is a list of the already implemented environment-variables. Some
specialties of common servers may be missing. These can be added to the next
release on users request:
- SERVER_NAME
The server's hostname, DNS alias, or IP address as it would appear in
self-referencing URLs.
- SERVER_SOFTWARE
The name and version of the information server software answering
the request (and running the gateway). For diner, this is something
like diner/1.3
- SERVER_PROTOCOL
The name and revision of the information protcol this request came in with.
For diner, this is something like HTTP/1.0
- SERVER_PORT
The port number to which the request was sent.
- REQUEST_METHOD
The method with which the request was made. For HTTP, this is "GET",
"HEAD", "POST", etc.
- QUERY_STRING
The information which follows the ? in the URL which referenced the CGI.
This is the query information.
- REMOTE_HOST
The hostname making the request. If diner does not have this information,
it sets REMOTE_ADDR and leave this unset.
- REMOTE_ADDR
The IP address of the remote host making the request.
- CONTENT_TYPE
For queries which have attached information, such as HTTP, POST and PUT,
this is the content type of the data.
- CONTENT_LENGTH
The length of the send content as given by the client.
- HTTP_USER_AGENT
The browser the client is using to send the request. General format:
software/version library/version.
- HTTP_REFERER
The site where the client was before he came here.
- HTTP_FROM
The From: header field as given by the client.
- HTTP_ACCEPT
The filetypes the client accepts.
- DOCUMENT_ROOT
The directory where the requested file is located.
- PATH_TRANSLATED
The full path to the requested file.
|