I'm doing what I guess is a fairly common task with perl: retrieving a number of data sources from the web, parsing, extracting and analysing the data. My question relates to retrieval, I use something like this:
use LWP::Simple;
#each page is actually processed in a subroutine but you get the idea
$page1 = "http://www.first.com";
$page1 = get($page1);
#rest of the pages in same format here
$pageN = "http://www.last.com";
$pageN = get($pageN);
Now this has (at least) two problems which I need to solve:
1/ each of the pages is retrieved in turn whereas given the speed of the server the script is run on I want to get them all at once, so Q1: how do I implement multithreading here?
2/ if a page fails to respond I dont want the script to wait any more than N seconds before moving to the next, so Q2: how do I time a (sub)process and kill it after N seconds?
Thanks for any help,
Ntav
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