CGI Environment Variables

Categories: Python

All the CGI programs have access to the following environment variables. These variables play an important role while writing any CGI program.


Sr.No. - Variable Name & Description

1. CONTENT_TYPE - The data type of the content. Used when the client is sending attached content to the server. For example, file upload.


2. CONTENT_LENGTH - The length of the query information. It is available only for POST requests.


3. HTTP_COOKIE - Returns the set cookies in the form of key & value pair.


4. HTTP_USER_AGENT - The User-Agent request-header field contains information about the user agent originating the request. It is name of the web browser.


5. PATH_INFO - The path for the CGI script.


6. QUERY_STRING - The URL-encoded information that is sent with GET method request.


7. REMOTE_ADDR - The IP address of the remote host making the request. This is useful logging or for authentication.


8. REMOTE_HOST - The fully qualified name of the host making the request. If this information is not available, then REMOTE_ADDR can be used to get IR address.


9. REQUEST_METHOD. The method used to make the request. The most common methods are GET and POST.


10. SCRIPT_FILENAME - The full path to the CGI script.

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