For communication between processes, see perlipc.

Maybe you can use non-blocking communication within a single process by using AnyEvent, but it's likely much easier to write the commands to a file or to simply not return a response from your webserver until the command has been processed, thus pushing the requirement for asynchronicity to Scratch.

For some value of "easy", using threads can make it easy to have shared access to a common data structure which is modified concurrently. If your Perl has been compiled with thread support, that may give you a nicer approach. I still recommend a command queue approach using Thread::Queue.

In reply to Re^3: Global variables and SimpleHTTP request handler by Corion
in thread Global variables and SimpleHTTP request handler by Anonymous Monk

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