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UPDATE: Seems that the data I was testing for landed right on a buffer chunk boundary. Not good. Let that be a lesson to all us part timers - boundaries suck!
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Recently, I had to drag my old perl knowledge up from the bottom of my brain to do a little db creation work.

I am taking a web page from our local chamber of commerce, where they give an alphabetical listing of their members, and sucking it in with Net::HTTP. I then cycle through the $buffer looking for occurances of "ID=XXXX". Those are links to "more info" on each company. Using the built-up array of IDs, I then pull each companies individual data.

Anyhow, to make a long story short (too late, right?) one business, serial number 3975, is always skipped!!! the regex $buf =~ /ID=([0-9]+)/ seems to think 3975 doesn't match! The only answer I have found is to first write the main web page to a file, then read in the file. THEN it matches.

Here is the code I am/was using:

#!/usr/bin/perl use strict; use Net::HTTP; use HTML::Strip; use LWP::Simple; my $DOMAIN="www.fentonchamber.org"; my $MAIN_LIST="AlphabeticalListing.asp"; my $HOMEDIR="/home/jrobiso2/Documents/CDS/Chamber/"; my $list_file="/tmp/AlphabeticalListing.html"; my @listing; ### Get initial listing of data from the main page. open(SRC, "+>$list_file") or die "Cannot open file: $!\n"; my $http = Net::HTTP->new(Host => $DOMAIN) || die $!; $http->keep_alive; $http->write_request(GET => "/$MAIN_LIST", 'User Agent' => "Mozilla/5. +0"); my($code, $mess, %h) = $http->read_response_headers; ## Build the listing of company numbers from the javascript window.ope +n ## calls inside the main listing html page. while (1) { my $buf; my $n = $http->read_entity_body($buf, 1024); die "read failed: $!" unless defined $n; last unless $n; # if ($buf =~ /ID=([0-9]+)/) { # OLD CODE # push @listing, $1; # THAT FAILED # } # print SRC $buf; } close(SRC); open(SRC, "<$list_file") || die "Cannot open file: $!\n"; while (<SRC>) { if (/ID=([0-9]+)/) { push @listing, $1; } } @listing = sort @listing;
From the code above you can see the actual site and page I am trying to steal from. If anyone can enlighten me as to what is wrong (what I have done wrong) I would greatly appreciate it, as this has taken 3 hours of my time and made me feel very stupid. I am using perl 5.8.6.


What does this little button do . .<Click>; "USER HAS SIGNED OFF FOR THE DAY"

In reply to Strange regex behavior - beware chunk boundaries! by tame1

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