Basic HTML version of Foils prepared 7 October 97

Foil 15 Two Different Strategies for WWW Client-Server Interactions - II

From Untitled presentation ARL Database Tutorial -- February 98. by Gang Cheng, C.W. Ou, Geoffrey C. Fox
CGI scripts --- programs (shell,perl,programming languages) to
  • Generate data (usually in HTML format) to be returned to the server
  • (which will then be transferred to the requesting client in HTTP protocol);
  • the resultant data are dynamically generated on the fly; pipes are used to feed the output (via STDOUT) to server; server performance is only determined by CPU processing)
CGI is Interface for running external programs on a Web server
  • Web server is configured to realize that any request for a file in a specific directory or with a specific filename extension are to be executed instead of served
  • Allows Web servers to create dynamic documents which only get created when they are requested by a browser

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