#!/usr/bin/perl

use strict;
use warnings;
use LWP::UserAgent;

my $base = 'http://www.tcichemicals.com/eshop/en/ap/catalog/coa_result/?page=coa';
my $filename = "test.pdf";

my $params = {
  product_number => 'E0393',
  lot_number => 'DY5BB'
};

my $agent = LWP::UserAgent->new(ssl_opts => { verify_hostname => 0});
push @{$agent->requests_redirectable}, 'POST';
print "@{$agent->requests_redirectable}". "\n";

my $response = $agent->post("$base", $params);

print $response->content;

my $response = $agent->post("$base", $params);
print $response->content;


while (my $wait = $response->header('Retry-After')) {
  print STDERR "Waiting ($wait)...\n";
  sleep $wait;
  $response = $agent->get($response->base);
}


die $response->status_line if !$response->is_success;
my $file = $response->decoded_content( charset => 'none' );
#my $md5_hex = md5_hex($filename);
#print "$md5_hex\n";
#my $save = "$file";

open (SAVE, ">", $filename) || die "open file error";
print SAVE $file;
close SAVE;