CGI Frequently Asked Questions

Sambar Server Documentation

CGI FAQs

My CGI is failing, where can I find error output (stderr) ?
What environment variables are available to my CGI ?

My CGI is failing, where can I find error output (stderr) ?
By default the Sambar Server uses pipes to communicate between the server and the user's CGI. In this mode, no temporary files are created. However, if the CGI/WinCGI tmp Removal is set to either noerror or never, the temporary files associated with CGI execution will remain in the Sambar Server tmp directory. These files can be useful in debugging script execution (for each CGI executed, files are created showing input, output and stderr content).

What environment variables are available to my CGI ?

The environment of the user under which the server is running is available.

The following variables (if applicable, depending on the request type):

AUTH_TYPE, CONTENT_LENGTH, CONTENT_TYPE,
	HTTP_COOKIE, HTTP_HOST, DOCUMENT_ROOT, GATEWAY_INTERFACE,
	HTTP_REFERER, HTTP_USERAGENT, PATH_INFO, PATH_TRANSLATED,
	QUERY_STRING, REMOTE_ADDR, REMOTE_HOST, REQUEST_METHOD,
	DOCUMENT_URI, SCRIPT_URI, SCRIPT_FILENAME, DOCUMENT_NAME,
	SERVER_NAME, SERVER_PORT, SERVER_PROTOCOL, SERVER_SOFTWARE,
	SSL_CIPHER, SSL_PROTOCOL_VERSION

In addition, any other "unexpected" HTTP headers sent by the browser in the request (prepended with HTTP_).