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NAME

     CGI::Fast - CGI Interface for Fast CGI



SYNOPSIS
         use CGI::Fast qw(:standard);
         $COUNTER = 0;
         while (new CGI::Fast) {
             print header;
             print start_html("Fast CGI Rocks");
             print
                 h1("Fast CGI Rocks"),
                 "Invocation number ",b($COUNTER++),
                 " PID ",b($$),".",
                 hr;
             print end_html;
         }




DESCRIPTION
     CGI::Fast is a subclass of the CGI object created by CGI.pm.
     It is specialized to work well with the Open Market FastCGI
     standard, which greatly speeds up CGI scripts by turning
     them into persistently running server processes.  Scripts
     that perform time-consuming initialization processes, such
     as loading large modules or opening persistent database
     connections, will see large performance improvements.



OTHER PIECES OF THE PUZZLE
     In order to use CGI::Fast you'll need a FastCGI-enabled Web
     server.  Open Market's server is FastCGI-savvy.  There are
     also freely redistributable FastCGI modules for NCSA httpd
     1.5 and Apache.  FastCGI-enabling modules for Microsoft
     Internet Information Server and Netscape Communications
     Server have been announced.

     In addition, you'll need a version of the Perl interpreter
     that has been linked with the FastCGI I/O library.
     Precompiled binaries are available for several platforms,
     including DEC Alpha, HP-UX and SPARC/Solaris, or you can
     rebuild Perl from source with patches provided in the
     FastCGI developer's kit.  The FastCGI Perl interpreter can
     be used in place of your normal Perl without ill
     consequences.

     You can find FastCGI modules for Apache and NCSA httpd,
     precompiled Perl interpreters, and the FastCGI developer's
     kit all at URL:

       http://www.fastcgi.com/




WRITING FASTCGI PERL SCRIPTS
     FastCGI scripts are persistent: one or more copies of the
     script are started up when the server initializes, and stay
     around until the server exits or they die a natural death.
     After performing whatever one-time initialization it needs,
     the script enters a loop waiting for incoming connections,
     processing the request, and waiting some more.

     A typical FastCGI script will look like this:

         #!/usr/local/bin/perl    # must be a FastCGI version of perl!
         use CGI::Fast;
         &do_some_initialization();
         while ($q = new CGI::Fast) {
             &process_request($q);
         }

     Each time there's a new request, CGI::Fast returns a CGI
     object to your loop.  The rest of the time your script waits
     in the call to new().  When the server requests that your
     script be terminated, new() will return undef.  You can of
     course exit earlier if you choose.  A new version of the
     script will be respawned to take its place (this may be
     necessary in order to avoid Perl memory leaks in long-
     running scripts).

     CGI.pm's default CGI object mode also works.  Just modify
     the loop this way:

         while (new CGI::Fast) {
             &process_request;
         }

     Calls to header(), start_form(), etc. will all operate on
     the current request.



INSTALLING FASTCGI SCRIPTS
     See the FastCGI developer's kit documentation for full
     details.  On the Apache server, the following line must be
     added to srm.conf:

         AddType application/x-httpd-fcgi .fcgi

     FastCGI scripts must end in the extension .fcgi.  For each
     script you install, you must add something like the
     following to srm.conf:

        AppClass /usr/etc/httpd/fcgi-bin/file_upload.fcgi -processes 2

     This instructs Apache to launch two copies of
     file_upload.fcgi at startup time.



USING FASTCGI SCRIPTS AS CGI SCRIPTS
     Any script that works correctly as a FastCGI script will
     also work correctly when installed as a vanilla CGI script.
     However it will not see any performance benefit.



CAVEATS
     I haven't tested this very much.



AUTHOR INFORMATION
     Copyright 1996-1998, Lincoln D. Stein.  All rights reserved.

     This library is free software; you can redistribute it
     and/or modify it under the same terms as Perl itself.

     Address bug reports and comments to: lstein@cshl.org



BUGS
     This section intentionally left blank.



SEE ALSO
     the CGI::Carp manpage, the CGI manpage

     =cut









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