[SOLVED] Repeating socket server

[aximbigfan]

Hi,

 

I have a small socket server I wrote in PHP. Unfortunately it isn't working as I want it to.

 

What I want it to do:

1. Receive data from the client

2. process the data

3. send it back

4. Reset for next client

 

#2, #3 and #4 work great! But #1 doesn't. The server doesn't even give the client a chance to send the data. What am I doing wrong?

 

Source:

<?php
//SocketServer
//A PHP app to RX/TX data via sockets
//Written by Chris S
$ver = 0;

//Options
$opt_address     = "192.168.15.111";
$opt_port        =  1337 ;
$opt_maxcients   =  10 ;

//Set time out to infinite
set_time_limit(0);

//Custom encoding function
function safe_encode($mode, $input)
{
if ($mode == "TX")
	return urlencode(json_encode($input));
else if ($mode == "RX")
	return json_decode(urldecode($input));
else
	return false;
}

//Check options and report
echo "Checking options... ";
if ($opt_address == NULL || $opt_port == NULL)
die("Error!\n");
else
echo "OK\n";

//Create socket and report
echo "Creating Socket... ";
$socket = socket_create(AF_INET, SOCK_STREAM, 0);
if (!$socket)
die("Error!\n");
else
echo "OK\n";

//Bind the socket and report
echo "Binding socket... ";
if (!socket_bind($socket, $opt_address, $opt_port))
die("Error!\n");
else
echo "OK; Bound to port $opt_port@$opt_address\n";

//Start listening for connections and report
echo "Listening for connections... ";
if (!socket_listen($socket))
die("Error!\n");
else
echo "OK\n";

while (true)
{
//Accept new connection
$spawn = socket_accept($socket);
if ($spawn)
	echo "New connection accepted!\n";
else
	echo "Error accepting new connection.\n";

//Read sent data and report
echo "Reading sent data... ";
$input = socket_read($spawn, 1024);
if (!$input)
	echo "Error!\n";
else
	echo "OK\n";
//Decode input
$input = safe_encode("RX", $input);

/////////////////////////
$ouput = base64_encode($input);

//Send data to client and report
echo "Sending data to client... ";
//safe_encode data
$output = safe_encode("TX", $output);
$write_result = socket_write($spawn, $output, strlen($output));
	if (!$write_result)
	echo "Error!\n";
else
	echo "OK\n";

//Close connections
socket_close($spawn);
//socket_close($socket);
}

?>

 

Thanks!

 

Chris

[btherl]

It works fine for me here, using linux and "PHP 4.4.4-8+etch4 (cli) (built: Jun 30 2007 21:02:54)"

 

What OS and php version are you using?

[aximbigfan]

Hi,

 

I am using Debian with PHP5 CLI.

 

Although it appears to work, it opens the connection, and spits out data without waiting for input. Try opening it with telnet, and you will see what I mean.

 

Thanks,

Chris

[mbeals]

It works on my end too.  PHP5, ubuntu 7.05

 

mbeals@LAMPserver:~$ telnet 192.168.3.198 1337
Trying 192.168.3.198...
Connected to 192.168.3.198.
Escape character is '^]'.
test
null
Connection closed by foreign host.

 

mbeals@LAMPserver:/home/webroot/www$ sudo php -q socketTest.php
Checking options... OK
Creating Socket... OK
Binding socket... OK; Bound to port 1337@192.168.3.198
Listening for connections... OK
New connection accepted!
Reading sent data... OK
Sending data to client... OK

 

you might also want to look into forking the process when a new connection is made.

 

 

[aximbigfan]

That's what I mean, it is sending "null", it is suppose to send the base64_encode of the string. It is not catching the input.

 

Chris

[aximbigfan]

Odd, I commented out the line with base64 encode, and now it works!!!

 

Chris

[btherl]

Oh .. take a close look at this line:

 

$ouput = base64_encode($input);

 

 

Step 1 was working fine, that's what I tested .. I did not test steps 2, 3 and 4 beacuse you said those were ok.

[aximbigfan]

output 

 

Thanks for noticing that!

 

Chris