Python socket server to PHP client socket - php

Question

I'm trying to setup a socket connection between Python and PHP. Python will function as server and PHP as client. I want to start the webpage and check if thread in Python is running, so I send a variable into the socket to PHP. This works. When the page is loaded the user can click on buttons to enable or disable the thread. So these buttons send back a variable enable/disable. But I'm unable to send this data back into the socket. What can I do to get the button press data back into the socket?
import time
import socket
import logging
def socketCon():
LOG_FILENAME = "logging.out"
logging.basicConfig(filename=LOG_FILENAME,level=logging.DEBUG,)
logging.info("Started setting up the socket to php connection")
HOST = '127.0.0.1' # Symbolic name meaning the local host
PORT = 50007 # Arbitrary non-privileged port
s = None
for res in socket.getaddrinfo(HOST, PORT, socket.AF_UNSPEC, socket.SOCK_STREAM, 0, socket.AI_PASSIVE):
af, socktype, proto, canonname, sa = res
try:
s = socket.socket(af, socktype, proto)
logging.info("Connected to Server")
except socket.error, msg:
logging.info('Socket Error Code : ' + str(msg[0]) + ' Message ' + msg[1])
s = None
continue
try:
s.bind(sa)
logging.info("Bind Complete")
s.listen(1)
logging.info("Now Listening to socket")
except socket.error, msg:
logging.info('Socket bind/listening Error Code : ' + str(msg[0]) + ' Message ' + msg[1])
s.close()
s = None
continue
break
if s is None:
logging.info("could not open socket")
#try:
logging.info("Waiting on Socket to Accept")
conn, addr = s.accept()
logging.info("Connected by "+str(addr))
# Get data from the socket
#data1 = conn.recv(1024)
#logging.info("What did the user send from the Website: "+str(data1))
# Send data to socket
alarm = "Enabled"
conn.send(alarm)
logging.info("Send status to client socket: "+str(alarm))
run = True
logging.info("Waiting for user button press")
# Wait for user button press from website
while run == True:
# Get the button press from the website
data2 = conn.recv(1024)
logging.info("Recieving data: "+str(data2))
if data2 == 0:
logging.info("What did the user select from the Website: "+str(data2))
run = False
# close the socket
conn.close()
def runTest():
#while:
try:
socketCon()
except:
print "There was a problem"
socketCon()
#runTest()
PHP client:
if(isset($_SESSION['id']))
{
// Put stored session variables into local PHP variable
$uid = $_SESSION['id'];
$usname = $_SESSION['username'];
$result = "Login data: <br /> Username: ".$usname. "<br /> Id: ".$uid;
error_reporting(E_ALL);
// Allow the script to hang around waiting for connections.
set_time_limit(0);
// Turn on implicit output flushing so we see what we're getting as it comes in.
ob_implicit_flush();
// Set timeout in seconds
$timeout = 3;
// Create a TCP/IP client socket.
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($socket === false)
{
$result2 = "Error: socket_create() failed: reason: " .socket_strerror(socket_last_error()). "\n";
}
// Server data
$host = '127.0.0.1';
$port = 50007;
$error = NULL;
$attempts = 0;
$timeout *= 1000; // adjust because we sleeping in 1 millisecond increments
$connected = FALSE;
while (!($connected = socket_connect($socket, $host, $port)) && ($attempts++ < $timeout))
{
$error = socket_last_error();
if ($error != SOCKET_EINPROGRESS && $error != SOCKET_EALREADY)
{
echo "Error Connecting Socket: ".socket_strerror($error) . "\n";
socket_close($socket);
return NULL;
}
usleep(1000);
}
if (!$connected)
{
echo "Error Connecting Socket: Connect Timed Out After " . $timeout/1000 . " seconds. ".socket_strerror(socket_last_error()) . "\n";
socket_close($socket);
return NULL;
}
// Write to the socket
//$output="Client Logged on via website" ;
//socket_write($socket, $output, strlen ($output)) or die("Could not write output\n");
// Get the response from the server - our current telemetry
$resultLength = socket_read($socket, 1024) or die("Could not read server response\n");
$result4 = $resultLength;
if($result4 === "Enabled")
{
echo "Alarm is Running";
$disabled1 = "disabled='disabled'";
$disabled2 = "";
}
elseif($result4 === "Disabled")
{
echo "Alarm is not running";
$disabled1 = "";
$disabled2 = "disabled='disabled'";
}
// close the socket
socket_close($socket);
}
else
{
$result = "You are not logged in yet";
}
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title><?php echo $usname ;?> - Alarm Enable/Disable</title>
</head>
<body>
<br>
<?php
echo $result;
?>
<br>
<?php
echo $result2;
?>
<br>
<form id="form" action="user.php" method="post" enctype="multipart/form-data">
<input type='submit' name='submit1' value='Enable Alarm' <?php echo $disabled1; ?> />
<input type='submit' name='submit2' value='Disable Alarm' <?php echo $disabled2; ?> />
</form>
<article>
<?php
if (isset($_POST[submit1]))
{
/*// Allow the script to hang around waiting for connections.
set_time_limit(0);
// Turn on implicit output flushing so we see what we're getting as it comes in.
ob_implicit_flush();
// Set timeout in seconds
$timeout = 3;
// Create a TCP/IP client socket.
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($socket === false)
{
$result2 = "Error: socket_create() failed: reason: " .socket_strerror(socket_last_error()). "\n";
}
// Server data
$host = '127.0.0.1';
$port = 50007;
$error = NULL;
$attempts = 0;
$timeout *= 1000; // adjust because we sleeping in 1 millisecond increments
$connected = FALSE;
while (!($connected = socket_connect($socket, $host, $port)) && ($attempts++ < $timeout))
{
$error = socket_last_error();
if ($error != SOCKET_EINPROGRESS && $error != SOCKET_EALREADY)
{
echo "Error Connecting Socket: ".socket_strerror($error) . "\n";
socket_close($socket);
return NULL;
}
usleep(1000);
}
*/
if (!$connected)
{
echo "Error Connecting Socket: Connect Timed Out After " . $timeout/1000 . " seconds. ".socket_strerror(socket_last_error()) . "\n";
socket_close($socket);
return NULL;
}
// Write to the socket
$input="Enable";
socket_write($socket, $input, strlen ($input)) or die("Could not write input\n");
echo "Send Enable back into socket to the Server";
// close the socket
socket_close($socket);
// Now direct to user feed
header("Location: logout.php");
}
if (isset($_POST[submit2]))
{
/*// Allow the script to hang around waiting for connections.
set_time_limit(0);
// Turn on implicit output flushing so we see what we're getting as it comes in.
ob_implicit_flush();
// Set timeout in seconds
$timeout = 3;
// Create a TCP/IP client socket.
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($socket === false)
{
$result2 = "Error: socket_create() failed: reason: " .socket_strerror(socket_last_error()). "\n";
}
// Server data
$host = '127.0.0.1';
$port = 50007;
$error = NULL;
$attempts = 0;
$timeout *= 1000; // adjust because we sleeping in 1 millisecond increments
$connected = FALSE;
while (!($connected = socket_connect($socket, $host, $port)) && ($attempts++ < $timeout))
{
$error = socket_last_error();
if ($error != SOCKET_EINPROGRESS && $error != SOCKET_EALREADY)
{
echo "Error Connecting Socket: ".socket_strerror($error) . "\n";
socket_close($socket);
return NULL;
}
usleep(1000);
}
*/
if (!$connected)
{
echo "Error Connecting Socket: Connect Timed Out After " . $timeout/1000 . " seconds. ".socket_strerror(socket_last_error()) . "\n";
socket_close($socket);
return NULL;
}
// Write to the socket
$input="Disable";
socket_write($socket, $input, strlen ($input)) or die("Could not write input\n");
echo "Send Disable back into socket to the Server";
// close the socket
socket_close($socket);
// Now direct to user feed
header("Location: logout.php");
}
?>
</article>
<br>
Logout
</body>
</html>

Answer 1

Ok I foudn the solution. I need to define a loop to get the s.accept() so that when the client want's to connect to the server it gets the new adrr values.

Answer 2

To solve this problem you will need to put s.accept() in a loop. This will make sure the connection remains established.