Hello Perl Monks,

I am trying to do using Parallel::ForkManager to do some crawling. I am new to Perl and am having some trouble with the crawling process. Here's the relevant piece of code 

    my $manager = Parallel::ForkManager->new(4);
    for(@identifier){ #List of URLs to be crawled
        $manager->start and next;

        $mech->get($_);
        die $mech->response->status_line unless $mech->success;

        my $html = $mech->content;

        ##some processing of HTML to extract the location of PDF file#
+# 

        mirror($url,"/home/username/data/$file_name.pdf");

        $manager->finish;
        sleep(2)
    }
    $manager->wait_all_children;

[download]

Now what happens when I run this program is that some PDF files are being retrieved and I notice an error message (" Error GETing URL_NAME: Service Temporarily Unavailable at crawl.pl line 138"). But in fact, the URL_NAME is accessible when I use a browser to view it. There are plenty of URLs not being crawled because of this.

What am I missing?

Thanks in advance.

In reply to Crawling with Parallel::ForkManager by listanand

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.