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First we accept a socket and fork the server. Then we overload the new socket as a code ref. This code ref takes one argument, another code ref, which is used as a callback.
The callback is called once for every line read on the socket. The line is put into $_ and the socket itself is passed in to the callback.
Our callback is scanning the line in $_ for an HTTP GET request. If one is found it parses the file name into $1. Then we use $1 to create an new IO::All file object... with a twist. If the file is executable("-x"), then we create a piped command as our IO::All object. This somewhat approximates CGI support.
Whatever the resulting object is, we direct the contents back at our socket which is in $_.
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