fig17_11.pl

PERL语言资料 可以用于PERL程序设计

#!/usr/bin/perl
# Fig. 17.11: fig17_11.pl

use strict;
use warnings;
use MD5;
use Mail::POP3Client;
use CGI qw( :standard );

my $user = param( "userName" );
my $password = param( "password" );
my $server = param( "server" );
my $offset = param( "offset" );

print( header() );
print( start_html( -title => "Check your mail!" ) );

my $pop = new Mail::POP3Client( USER => $user, 
   PASSWORD => $password, HOST => $server ) or
   print( h1( "Cannot connect: $!" ) );

my $messages = $pop->Count();
print( "<p>You have $messages messages in your inbox.</p>" );
my $offset1 = $offset - 5;
my $offset2 = $offset + 5;
my $start = 1 + $offset;
my $end = ( $offset2 < $messages ? $offset2 : $messages );

for ( $start .. $end ) {
   print( "<p>$_: " );

   foreach ( $pop->Head( $_ ) ) {
      /^(From|subject):\s+/i and print $_, "<br/>";
   }

   print( "</p>\n" );
}

print <<FORM1 if ( $offset );
<form action = "fig17_11.pl" method = "post">
<input name = "userName" value = $user type = "hidden"> 
<input name = "password" value = $password type = "hidden"> 
<input name = "server" value = $server type = "hidden"> 
<input name = "offset" value = $offset1 type = "hidden"> 
<input type = "submit" value = "See previous 5">
</form>
FORM1

print <<FORM2 if ( $end != $messages );
<form action = "fig17_11.pl" method = "post">
<input name = "userName" value = $user type = "hidden"> 
<input name = "password" value = $password type = "hidden"> 
<input name = "server" value = $server type = "hidden"> 
<input name = "offset" value = $offset2 type = "hidden"> 
<input type = "submit" value = "See next 5">
</form>
FORM2

print( end_html() );

$pop->Close();

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