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I would look at AnyEvent::HTTP, which allows you to run lots (and lots) of HTTP requests in parallel. To reduce bandwidth on errors, you could first test with a HEAD request and follow up with a GET request on success. If you expect most URLs to be successfull and want the body then, I would just use a GET request.

For grouping all your requests, have a look at the ->begin method of CondVars in AnyEvent.

A rough, untested program could look something like this:

#!perl -w use strict; use AnyEvent; use AnyEvent::HTTP; my $done = AnyEvent->condvar; while (my $url = <DATA>) { $url =~ s!\s+$!!; $done->begin( sub { $_[0]->send } ); http_get $url, sub { my ($body, $headers) = @_; print "Retrieved $url ($headers->{Status})"; $done->end }; }; print "All requests sent. Waiting for responses.\n"; $done->recv; print "Done.\n"; __DATA__ http://localhost http://example.com http://google.in

Update: Remove whitespace at end of the URLs


In reply to Re: Fast fetching of HTML response code by Corion
in thread Fast fetching of HTML response code by mrguy123

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