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P5-paralleluseragent
Jul 20, 2023
Extension for LWP to allow parallel HTTP and FTP access
ParallelUserAgent or PUA for short is an extension of the existing libwww-5.x distribution. It allows you to connect to download several Web pages in parallel, without having to request each page one after the other.
Instead of retrieving each single page using LWPUserAgentrequest or simple_request methods, you first “register” all pages that you wish to download in parallel and then call PUA’s “wait” method, which will then make all the necessary connections and download the pages.
You can define callback routines which will be called whenever a connection is established, is cut off, new data comes in or a request finishes. The subroutines can be global for all requests you registered, or different for every single request.
Callbacks for example allow you to print status updates as the responses come in, or even immediately post follow-up requests based on the responses, all within the same single “wait” cycle.
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