3.1.3 Differences under CGI/FastCGI

Whereas the StandAlone coupler builds Request objects directly from the raw request coming off the wire, the CGI and FastCGI couplers must resort to reconstructing Requests from the environment and standard input. The resulting object has the same API as above, but since some attributes could have subtly different meanings, we provide the following reference. Where called for, \r\n line breaks are used.

raw: The concatenation of raw_line, raw_headers, and raw_body as described below.

raw_line: The Request-URI is reconstructed from the SCRIPT_NAME, PATH_INFO, and QUERY_STRING environment variables. This is combined with the REQUEST_METHOD and SERVER_PROTOCOL variables to approximate the Request-Line.

raw_headers: The headers are reconstructed by taking all environment variables beginning with "HTTP_" and replacing all underscores with dashes.

raw_body: Read from the standard input.

method: Equivalent to the REQUEST_METHOD environment variable.

uri: The dictionary is based on raw_line as derived above.

path: Equivalent to the PATH_INFO environment variable.

headers: The Message object is constructed from raw_headers as described above.