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05.28.2008 at 11:19AM PDT, ID: 23439065
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9.8

Sending files over IO socket with perl

Asked by BlakeEM in Perl Programming Language

Tags: ,

I'm trying to write a program that can send and receive files from a server using a socket connection. I tested this code out with only the file transfer and it works fine, however once I started it build it into a server/client it was sending most of the binary files but they would never work. For example I'm testing it with notepad.exe. The file is 67.5k but I only get 64k every time I try.

It also never noticed the end of file, but this may be because it's never sending everything.

I tried to add in pauses and everything else I can think of but I'm note sure that's the issue because nothing I tried was working.

I put the code for the client and server below that I have so far.Start Free Trial 
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SERVER CODE:
#####################################
 
use IO::Socket;
use strict;
 
my $server = IO::Socket::INET->new(
    Listen => 5,
    LocalAddr => '192.168.10.105',
    LocalPort => 5050,
    Proto     => 'tcp'
) or die "Can't create server socket: $!";
$server->autoflush(1);
 
while(my $client = $server->accept)
{
   while (<$client>)
   {
      @command = split(/ /, $_);
 
      if(lc(trim($command[0])) eq 'time')   { print $client &getTimeStamp()."\r\n"; }
      elsif(lc(trim($command[0])) eq 'hi')  { print $client "Hello!\r\n"; }
      elsif(lc(trim($command[0])) eq 'get')
      {
         if(defined($command[1]) && -e trim($command[1]))
         {
            print $client "OK\r\n";
 
            open FILE, "$command[1]";
            binmode FILE;
            while (<FILE>)
            {
                print $client $_;
            }
            close FILE;
         }
         else
         {
            print $client "File not found!\r\n"; 
         }
 
      }
      else { print $client "Unknown Command\r\n"; }
   }
}
 
 
 
 
#Gets the time stamp and returns it when called
sub getTimeStamp
{
   # Get the all the values for current time
   (my $Second, my $Minute, my $Hour, my $Day, my $Month, my $Year, my $WeekDay, my $DayOfYear, my $IsDST) = localtime(time);
 
   # adding 1900 will create a four digit year value
   $Year = $Year - 100;
 
   # Adding 1 to month because months don't start at 0
   $Month++;
 
   #format the current time into the correct format and return it
   return sprintf("%02d%02d%02d%02d%02d%02d",$Year,$Month,$Day,$Hour,$Minute,$Second);
}
 
 
sub trim($)
{
	my $string = shift;
	$string =~ s/^\s+//;
	$string =~ s/\s+$//;
        $string =~ s/[\r]+//;
        $string =~ s/[\n]+//;
	return $string;
}
 
 
CLIENT CODE:
#################################
 
use IO::Socket;
use strict;
 
my $server = IO::Socket::INET->new(
    PeerAddr => '192.168.10.105',
    PeerPort => 5050,
    Proto    => 'tcp'
) or die "Can't create client socket: $!";
$server->autoflush(1);
 
my $i = 0;
my $msg;
my @command;
while(1)
{
   print "ASAP> ";
   $msg = <STDIN>;
   print $server $msg."\r";
 
   while(<$server>)
   {
      @command = split(/ /, $msg);
 
      if(lc(trim($command[0])) eq 'get')
      {
 
         if(trim($_) eq 'OK')
         {
            open FILE, ">$command[1]" or die "Can't open: $!";
            binmode FILE;
 
            while (<$server>)
            {
                print FILE $_;
            }
         }
 
      }
 
      print $_;
      last if eof($_);
   }
 
 
 
 
}
 
 
 
sub trim($)
{
	my $string = shift;
	$string =~ s/^\s+//;
	$string =~ s/\s+$//;
        $string =~ s/[\r]+//;
        $string =~ s/[\n]+//;
	return $string;
}
[+][-]05.28.2008 at 11:42AM PDT, ID: 21663067

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[+][-]05.28.2008 at 12:09PM PDT, ID: 21663327

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[+][-]05.28.2008 at 12:24PM PDT, ID: 21663477

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About this solution

Zone: Perl Programming Language
Tags: Perl, NA
Sign Up Now!
Solution Provided By: Adam314
Participating Experts: 1
Solution Grade: A
 
 
[+][-]05.28.2008 at 01:14PM PDT, ID: 21663937

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

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[+][-]05.28.2008 at 01:35PM PDT, ID: 21664114

At Experts Exchange, members can ask their questions to thousands of technology professionals, also known as Experts. Experts compete and collaborate to answer those questions by leaving comments like this one.

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