It is exactly what you're asking. A server implementing CGI uses %ENV to communicate HTTP headers and other basic values (document_root)

STDIN is used for the BODY of the HTTP request

If this doesn't answer your question ... ask a different question please

In reply to Re^3: How a web server sending data to a CGI perl script ? by Anonymous Monk
in thread How a web server sending data to a CGI perl script ? by exilepanda

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