Server side:
<?php
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
socket_bind($socket, '127.0.0.1', 8000);
socket_listen($socket);
$client = socket_accept($socket);
$handshake = socket_read($client, 1024);
preg_match('/Sec-WebSocket-Key\: (.+?)\r\n/', $handshake, $accept);
$accept = base64_encode(sha1("$accept[1]258EAFA5-E914-47DA-95CA-C5AB0DC85B11", true));
$handshake = "HTTP/1.1 101 Switching Protocols\r\n";
$handshake .= "Upgrade: websocket\r\n";
$handshake .= "Connection: Upgrade\r\n";
$handshake .= "Sec-WebSocket-Accept: $accept\r\n\r\n";
socket_write($client, $handshake.chr(0), strlen($handshake.chr(0)));
socket_write($client, 's'.chr(0));
sleep(5);
socket_close($client);
socket_close($socket);
?>
Client side:
<div id="output"></div>
<script>
if ("WebSocket" in window) {
var socket = new WebSocket('ws://127.0.0.1:8000');
socket.onopen = function() {
document.getElementById('output').innerHTML += 'socket open<br />';
}
socket.onmessage = function(msg) {
document.getElementById('output').innerHTML += 'new msg: '+msg.data+'<br />';
}
socket.onclose = function() {
document.getElementById('output').innerHTML += 'socket close';
}
}
</script>
I get "socket open" and after 5 seconds "socket close". I don't get the "s" sent by the server.
Tried on Firefox and Chrome.
What am I doing wrong?
Messages between client and server are not plain text. See the data framing section of the protocol spec for details on how to encode/decode messages.
There are plenty of code snippets in other SO questions (e.g. here) that might help get you started.
Related
I would like to know, how do you store date in socket stream ?
I'm learning php socket atm, and for example, if i want to make an online users list : People on the webpage have a session[username]. I want to link it to the IP address in socket clients list.
I don't want to get the session_id of the client in socket page, i would like to send the username to that socket page (via javascript socket.onopen) and then the username would be stored until connection end.
Is that possible ?
EDIT
/* SERVER DATA
=======================================================*/
$host = '127.0.0.1'; //host
$port = '8090'; //port
$null = NULL; //null var
//Create TCP/IP, IPv4 stream socket
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
//Reuseable port
socket_set_option($socket, SOL_SOCKET, SO_REUSEADDR, 1);
//Bind socket to specified host
socket_bind($socket, 0, $port);
//Listen to port
socket_listen($socket);
//Create & add listening socket to the list
$clients = array($socket);
//Start endless loop, so that our script doesn't stop
while (true) {
//Manage multiple connections
$changed = $clients;
//Returns the socket resources in $changed array
socket_select($changed, $null, $null, 0, 10);
//Check for new socket
if (in_array($socket, $changed)) {
$socket_new = socket_accept($socket); //accept new socket
$clients[] = $socket_new; //add socket to client array
$header = socket_read($socket_new, 1024); //read data sent by the socket
perform_handshaking($header, $socket_new, $host, $port); //perform websocket handshake
socket_getpeername($socket_new, $ip); //get ip address of connected socket
$response = mask(json_encode(array('type'=>'system_user_conn', 'message'=>$ip))); //prepare json data
send_message($response); //notify all users about new connection
//make room for new socket
$found_socket = array_search($socket, $changed);
unset($changed[$found_socket]);
}
//loop through all connected sockets
foreach ($changed as $changed_socket) {
//check for any incomming data
while(socket_recv($changed_socket, $buf, 1024, 0) >= 1)
{
$received_text = unmask($buf); //unmask data
$tst_msg = json_decode($received_text); //json decode
$user_name = $tst_msg->name; //sender name
$user_message = $tst_msg->message; //message text
//prepare data to be sent to client
$response_text = mask(json_encode(array('type'=>'usermsg', 'name'=>$user_name, 'message'=>$user_message)));
send_message($response_text); //send data
break 2; //exist this loop
}
$buf = #socket_read($changed_socket, 1024, PHP_NORMAL_READ);
if ($buf === false) { // check disconnected client
// remove client for $clients array
$found_socket = array_search($changed_socket, $clients);
socket_getpeername($changed_socket, $ip);
unset($clients[$found_socket]);
//notify all users about disconnected connection
$response = mask(json_encode(array('type'=>'system', 'message'=>$ip.' disconnected')));
send_message($response);
}
}
}
// close the listening socket
socket_close($socket);
function send_message($msg)
{
global $clients;
foreach($clients as $changed_socket)
{
#socket_write($changed_socket,$msg,strlen($msg));
}
return true;
}
//Unmask incoming framed message
function unmask($text) {
$length = ord($text[1]) & 127;
if($length == 126) {
$masks = substr($text, 4, 4);
$data = substr($text, 8);
}
elseif($length == 127) {
$masks = substr($text, 10, 4);
$data = substr($text, 14);
}
else {
$masks = substr($text, 2, 4);
$data = substr($text, 6);
}
$text = "";
for ($i = 0; $i < strlen($data); ++$i) {
$text .= $data[$i] ^ $masks[$i%4];
}
return $text;
}
//Encode message for transfer to client.
function mask($text)
{
$b1 = 0x80 | (0x1 & 0x0f);
$length = strlen($text);
if($length <= 125)
$header = pack('CC', $b1, $length);
elseif($length > 125 && $length < 65536)
$header = pack('CCn', $b1, 126, $length);
elseif($length >= 65536)
$header = pack('CCNN', $b1, 127, $length);
return $header.$text;
}
//handshake new client.
function perform_handshaking($receved_header,$client_conn, $host, $port)
{
$headers = array();
$lines = preg_split("/\r\n/", $receved_header);
foreach($lines as $line)
{
$line = chop($line);
if(preg_match('/\A(\S+): (.*)\z/', $line, $matches))
{
$headers[$matches[1]] = $matches[2];
}
}
$secKey = $headers['Sec-WebSocket-Key'];
$secAccept = base64_encode(pack('H*', sha1($secKey . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11')));
//hand shaking header
$upgrade = "HTTP/1.1 101 Web Socket Protocol Handshake\r\n" .
"Upgrade: websocket\r\n" .
"Connection: Upgrade\r\n" .
"WebSocket-Origin: $host\r\n" .
"WebSocket-Location: ws://$host:$port/demo/shout.php\r\n".
"Sec-WebSocket-Accept:$secAccept\r\n\r\n";
socket_write($client_conn,$upgrade,strlen($upgrade));
}
I would like to send 'message'=>$username.
At this line :
$response = mask(json_encode(array('type'=>'system_user_conn', 'message'=>$ip))); //prepare json data
When i'm using on send data (javascript), i re-send the username all the time, like this :
$('#frmChat').on("submit",function(event){
event.preventDefault();
var messageJSON = {
type: 'usrmsg',
name: '<?php echo $SESSION['pseudo']; ?>',
message: $('#chat-message').val()
};
websocket.send(JSON.stringify(messageJSON));
});
I'm looking for a way to store the username.
Not to re-send it all the time.
It will help me to create an "online users" list.
Thank you in advance.
Why would you do that?
You can just use the PHP Session Variable to check if a user is logged in.
You can specify the time a session will be stored in the PHP configuration.
You can also remove the session if needed.
I use socket.io for socket app in my client side. For the server I use socket library of PHP.
After the handsake, the connection was closed and generated a warning
failed: WebSocket is closed before the connection is established.
socket_getsockname($socket_server, $addr, $port);
while($socket = socket_accept($socket_server)) {
$handshake = false;
if(!$socket){
print "error \n";
}
socket_getpeername($socket, $raddr, $rport);
$msg = "Welcome aboard !";
$length = strlen($msg);
print socket_read ( $socket , 255 )."\n";
$error = socket_last_error($socket);
$error_message = socket_strerror($error);
if(!$handshake){
$bytes = socket_recv($socket,$buffer,2048,0);
list($resource,$host,$origin,$key,$key1,$key2,$l8b) = getheaders($buffer);
$accept = base64_encode(SHA1($key."258EAFA5-E914-47DA-95CA-C5AB0DC85B11", true));
$upgrade = "HTTP/1.1 101 WebSocket Protocol Handshake\r\n" .
"Upgrade: WebSocket\r\n" .
"Connection: Upgrade\r\n" .
"Sec-WebSocket-Origin: " . $origin . "\r\n" .
"Sec-WebSocket-Location: ws://" . $host . $resource . "\r\n" .
"Sec-WebSocket-Accept: " . $accept . "\r\n\r\n";
if(socket_write($socket,$upgrade.chr(0),strlen($upgrade.chr(0)))) {
$handshake = true;
}
}
else{
if(socket_write ( $socket , $msg,$length)){
print "Mesg envoyee \n";
}
}
do{
$read = socket_read($socket, 1080);
print $read."\n";
if(socket_write ( $socket , $msg,$length)){
print "Mesg envoyee \n";
}
} while ($read != '');
in my server side in PHP
in my client :
var socket = io('http://localhost:4454',{
agent: false,
transports: ['websocket']
});
console.log(socket);
socket.on('connect', () => {
socket.send('hi');
console.log(socket);
});
socket.emit('foo');
socket.on('message', (data) => {
console.log(data);
console.log(socket);
});
socket.on('data', (data) => {
console.log(data);
});
socket.on('error', (error) => {
console.log(error);
});
//blocage des reconnection si erreurs
var attemp = 5;
socket.on('reconnecting', (attemp) => {
console.log("I'm sad :(");
//socket.close();
});
I don't find any solution for this issue.
I don't understand why in localhost stream was automatically close.
Server side looked fine, in this time...
i've just recently been trying to get a Web socket working for my new client chat.
I'm running XAMPP on localhost and have made sure my socket locations are correct.
The socket connects to the chat due to chat messaged or Connected! but when I refresh the page, the messages are lost and the command prompt shows this error:
Image of command prompt error
Here is my server.php code :
<?php
$host = 'localhost'; //host
$port = '900'; //port
$null = NULL; //null var
//Create TCP/IP sream socket
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
//reuseable port
socket_set_option($socket, SOL_SOCKET, SO_REUSEADDR, 1);
//bind socket to specified host
socket_bind($socket, 0, $port);
//listen to port
socket_listen($socket);
//create & add listning socket to the list
$clients = array($socket);
//start endless loop, so that our script doesn't stop
while (true) {
//manage multipal connections
$changed = $clients;
//returns the socket resources in $changed array
socket_select($changed, $null, $null, 0, 10);
//check for new socket
if (in_array($socket, $changed)) {
$socket_new = socket_accept($socket); //accpet new socket
$clients[] = $socket_new; //add socket to client array
$header = socket_read($socket_new, 1024); //read data sent by the socket
perform_handshaking($header, $socket_new, $host, $port); //perform websocket handshake
socket_getpeername($socket_new, $ip); //get ip address of connected socket
$response = mask(json_encode(array('type'=>'system', 'message'=>$ip.' connected'))); //prepare json data
send_message($response); //notify all users about new connection
//make room for new socket
$found_socket = array_search($socket, $changed);
unset($changed[$found_socket]);
}
//loop through all connected sockets
foreach ($changed as $changed_socket) {
//check for any incomming data
while(socket_recv($changed_socket, $buf, 1024, 0) >= 1)
{
$received_text = unmask($buf); //unmask data
$tst_msg = json_decode($received_text); //json decode
$user_name = $tst_msg->name; //sender name
$user_message = $tst_msg->message; //message text
$user_color = $tst_msg->color; //color
//prepare data to be sent to client
$response_text = mask(json_encode(array('type'=>'usermsg', 'name'=>$user_name, 'message'=>$user_message, 'color'=>$user_color)));
send_message($response_text); //send data
break 2; //exist this loop
}
$buf = #socket_read($changed_socket, 1024, PHP_NORMAL_READ);
if ($buf === false) { // check disconnected client
// remove client for $clients array
$found_socket = array_search($changed_socket, $clients);
socket_getpeername($changed_socket, $ip);
unset($clients[$found_socket]);
//notify all users about disconnected connection
$response = mask(json_encode(array('type'=>'system', 'message'=>$ip.' disconnected')));
send_message($response);
}
}
}
// close the listening socket
socket_close($socket);
function send_message($msg)
{
global $clients;
foreach($clients as $changed_socket)
{
#socket_write($changed_socket,$msg,strlen($msg));
}
return true;
}
//Unmask incoming framed message
function unmask($text) {
$length = ord($text[1]) & 127;
if($length == 126) {
$masks = substr($text, 4, 4);
$data = substr($text, 8);
}
elseif($length == 127) {
$masks = substr($text, 10, 4);
$data = substr($text, 14);
}
else {
$masks = substr($text, 2, 4);
$data = substr($text, 6);
}
$text = "";
for ($i = 0; $i < strlen($data); ++$i) {
$text .= $data[$i] ^ $masks[$i%4];
}
return $text;
}
//Encode message for transfer to client.
function mask($text)
{
$b1 = 0x80 | (0x1 & 0x0f);
$length = strlen($text);
if($length <= 125)
$header = pack('CC', $b1, $length);
elseif($length > 125 && $length < 65536)
$header = pack('CCn', $b1, 126, $length);
elseif($length >= 65536)
$header = pack('CCNN', $b1, 127, $length);
return $header.$text;
}
//handshake new client.
function perform_handshaking($receved_header,$client_conn, $host, $port)
{
$headers = array();
$lines = preg_split("/\r\n/", $receved_header);
foreach($lines as $line)
{
$line = chop($line);
if(preg_match('/\A(\S+): (.*)\z/', $line, $matches))
{
$headers[$matches[1]] = $matches[2];
}
}
$secKey = $headers['Sec-WebSocket-Key'];
$secAccept = base64_encode(pack('H*', sha1($secKey . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11')));
//hand shaking header
$upgrade = "HTTP/1.1 101 Web Socket Protocol Handshake\r\n" .
"Upgrade: websocket\r\n" .
"Connection: Upgrade\r\n" .
"WebSocket-Origin: $host\r\n" .
"WebSocket-Location: ws://$host:$port/demo/shout.php\r\n".
"Sec-WebSocket-Accept:$secAccept\r\n\r\n";
socket_write($client_conn,$upgrade,strlen($upgrade));
}
It gets to the lines 52, 53, and 54 when the errors hit.
It can't read the current users details.
My script for my main chat page is :
<script type="text/javascript">
$(document).ready(function() {
//create a new WebSocket object.
var wsUri = "ws://localhost:900/New%20Login%20System/HazzJay/chat/server.php";
websocket = new WebSocket(wsUri);
websocket.onopen = function(ev) { // connection is open
$('#message_box').append("<div class=\"system_msg\">Connected!</div>"); //notify user
}
$('#send-btn').click(function(){ //use clicks message send button
var mymessage = $('#message').val(); //get message text
var myname = $('#name').val(); //get user name
if(myname == ""){ //empty name?
alert("Enter your Name please!");
return;
}
if(mymessage == ""){ //emtpy message?
alert("Enter Some message Please!");
return;
}
document.getElementById("name").style.visibility = "hidden";
var objDiv = document.getElementById("message_box");
objDiv.scrollTop = objDiv.scrollHeight;
//prepare json data
var msg = {
message: mymessage,
name: myname,
color : '<?php echo $colours[$user_colour]; ?>'
};
//convert and send data to server
websocket.send(JSON.stringify(msg));
});
//#### Message received from server?
websocket.onmessage = function(ev) {
var msg = JSON.parse(ev.data); //PHP sends Json data
var type = msg.type; //message type
var umsg = msg.message; //message text
var uname = msg.name; //user name
var ucolor = msg.color; //color
if(type == 'usermsg')
{
$('#message_box').append("<div><span class=\"user_name\" style=\"color:#"+ucolor+"\">"+uname+"</span> : <span class=\"user_message\">"+umsg+"</span></div>");
}
if(type == 'system')
{
$('#message_box').append("<div class=\"system_msg\">"+umsg+"</div>");
}
$('#message').val(''); //reset text
var objDiv = document.getElementById("message_box");
objDiv.scrollTop = objDiv.scrollHeight;
};
websocket.onerror = function(ev){$('#message_box').append("<div class=\"system_error\">Error Occurred - "+ev.data+"</div>");};
websocket.onclose = function(ev){$('#message_box').append("<div class=\"system_msg\">Connection Closed</div>");};
});
</script>
I want it to load the previous messages in the chat even if a page is refreshed.
I am working on chat application using websockets where I created client and server program. It is working properly on local host but as soon as I upload it to server it gives error message:
Warning: socket_bind(): unable to bind address [98]: Address already in use
I have seen other answers from Stack Overflow but they are also not working. Below is my code for client and server. I tried to changes the port also but the same issue.
Both of these programs are inside test3 folder whose path I have given in client program as
var wsUri = "ws://xx.xx.xxx.xx:25763/test3/server.php";
Server.php
<?php
$host = 'xx.xx.xxx.xx'; //host
$port = '25763'; //port
$null = NULL; //null var
set_time_limit(0);
//Create TCP/IP sream socket
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die("Could not create socket\n");
//reuseable port
socket_set_option($socket, SOL_SOCKET, SO_REUSEADDR, 1);
//bind socket to specified host
socket_bind($socket, $host, $port) or die("Could not bind to socket\n");
//listen to port
socket_listen($socket, 3) or die("Could not set up socket listener\n");
//create & add listning socket to the list
$clients = array($socket);
//start endless loop, so that our script doesn't stop
while (true) {
//manage multipal connections
$changed = $clients;
//returns the socket resources in $changed array
socket_select($changed, $null, $null, 0, 10);
//check for new socket
if (in_array($socket, $changed)) {
$socket_new = socket_accept($socket); //accpet new socket
$clients[] = $socket_new; //add socket to client array
$header = socket_read($socket_new, 1024); //read data sent by the socket
perform_handshaking($header, $socket_new, $host, $port); //perform websocket handshake
socket_getpeername($socket_new, $ip); //get ip address of connected socket
$response = mask(json_encode(array('type'=>'system', 'message'=>$ip.' connected'))); //prepare json data
send_message($response); //notify all users about new connection
//make room for new socket
$found_socket = array_search($socket, $changed);
unset($changed[$found_socket]);
}
//loop through all connected sockets
foreach ($changed as $changed_socket) {
//check for any incomming data
while(socket_recv($changed_socket, $buf, 1024, 0) >= 1)
{
$received_text = unmask($buf); //unmask data
$tst_msg = json_decode($received_text); //json decode
$user_name = $tst_msg->name; //sender name
$user_message = $tst_msg->message; //message text
$user_color = $tst_msg->color; //color
//prepare data to be sent to client
$response_text = mask(json_encode(array('type'=>'usermsg', 'name'=>$user_name, 'message'=>$user_message, 'color'=>$user_color)));
send_message($response_text); //send data
break 2; //exist this loop
}
$buf = #socket_read($changed_socket, 1024, PHP_NORMAL_READ);
if ($buf === false) { // check disconnected client
// remove client for $clients array
$found_socket = array_search($changed_socket, $clients);
socket_getpeername($changed_socket, $ip);
unset($clients[$found_socket]);
//notify all users about disconnected connection
$response = mask(json_encode(array('type'=>'system', 'message'=>$ip.' disconnected')));
send_message($response);
}
}
}
// close the listening socket
socket_close($sock);
function send_message($msg)
{
global $clients;
foreach($clients as $changed_socket)
{
#socket_write($changed_socket,$msg,strlen($msg));
}
return true;
}
//Unmask incoming framed message
function unmask($text) {
$length = ord($text[1]) & 127;
if($length == 126) {
$masks = substr($text, 4, 4);
$data = substr($text, 8);
}
elseif($length == 127) {
$masks = substr($text, 10, 4);
$data = substr($text, 14);
}
else {
$masks = substr($text, 2, 4);
$data = substr($text, 6);
}
$text = "";
for ($i = 0; $i < strlen($data); ++$i) {
$text .= $data[$i] ^ $masks[$i%4];
}
return $text;
}
//Encode message for transfer to client.
function mask($text)
{
$b1 = 0x80 | (0x1 & 0x0f);
$length = strlen($text);
if($length <= 125)
$header = pack('CC', $b1, $length);
elseif($length > 125 && $length < 65536)
$header = pack('CCn', $b1, 126, $length);
elseif($length >= 65536)
$header = pack('CCNN', $b1, 127, $length);
return $header.$text;
}
//handshake new client.
function perform_handshaking($receved_header,$client_conn, $host, $port)
{
$headers = array();
$lines = preg_split("/\r\n/", $receved_header);
foreach($lines as $line)
{
$line = chop($line);
if(preg_match('/\A(\S+): (.*)\z/', $line, $matches))
{
$headers[$matches[1]] = $matches[2];
}
}
$secKey = $headers['Sec-WebSocket-Key'];
$secAccept = base64_encode(pack('H*', sha1($secKey . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11')));
//hand shaking header
$upgrade = "HTTP/1.1 101 Web Socket Protocol Handshake\r\n" .
"Upgrade: websocket\r\n" .
"Connection: Upgrade\r\n" .
"WebSocket-Origin: $host\r\n" .
"WebSocket-Location: ws://$host:$port/demo/shout.php\r\n".
"Sec-WebSocket-Accept:$secAccept\r\n\r\n";
socket_write($client_conn,$upgrade,strlen($upgrade));
}
Client.php
<!DOCTYPE html>
<html>
<head>
<meta charset='UTF-8' />
<style type="text/css">
<!--
.chat_wrapper {
width: 500px;
margin-right: auto;
margin-left: auto;
background: #CCCCCC;
border: 1px solid #999999;
padding: 10px;
font: 12px 'lucida grande',tahoma,verdana,arial,sans-serif;
}
.chat_wrapper .message_box {
background: #FFFFFF;
height: 150px;
overflow: auto;
padding: 10px;
border: 1px solid #999999;
}
.chat_wrapper .panel input{
padding: 2px 2px 2px 5px;
}
.system_msg{color: #BDBDBD;font-style: italic;}
.user_name{font-weight:bold;}
.user_message{color: #88B6E0;}
-->
</style>
</head>
<body>
<?php
$colours = array('007AFF','FF7000','FF7000','15E25F','CFC700','CFC700','CF1100','CF00BE','F00');
$user_colour = array_rand($colours);
?>
<script src="//ajax.googleapis.com/ajax/libs/jquery/2.0.0/jquery.min.js"></script>
<script language="javascript" type="text/javascript">
$(document).ready(function(){
//create a new WebSocket object.
var wsUri = "ws://xx.xx.xxx.xx:25763/test3/server.php";
websocket = new WebSocket(wsUri);
websocket.onopen = function(ev) { // connection is open
$('#message_box').append("<div class=\"system_msg\">Connected!</div>"); //notify user
}
$('#send-btn').click(function(){ //use clicks message send button
var mymessage = $('#message').val(); //get message text
var myname = $('#name').val(); //get user name
if(myname == ""){ //empty name?
alert("Enter your Name please!");
return;
}
if(mymessage == ""){ //emtpy message?
alert("Enter Some message Please!");
return;
}
//prepare json data
var msg = {
message: mymessage,
name: myname,
color : '<?php echo $colours[$user_colour]; ?>'
};
//convert and send data to server
websocket.send(JSON.stringify(msg));
});
//#### Message received from server?
websocket.onmessage = function(ev) {
var msg = JSON.parse(ev.data); //PHP sends Json data
var type = msg.type; //message type
var umsg = msg.message; //message text
var uname = msg.name; //user name
var ucolor = msg.color; //color
if(type == 'usermsg')
{
$('#message_box').append("<div><span class=\"user_name\" style=\"color:#"+ucolor+"\">"+uname+"</span> : <span class=\"user_message\">"+umsg+"</span></div>");
}
if(type == 'system')
{
$('#message_box').append("<div class=\"system_msg\">"+umsg+"</div>");
}
$('#message').val(''); //reset text
};
websocket.onerror = function(ev){$('#message_box').append("<div class=\"system_error\">Error Occurred - "+ev.data+"</div>");};
websocket.onclose = function(ev){$('#message_box').append("<div class=\"system_msg\">Connection Closed</div>");};
});
</script>
<div class="chat_wrapper">
<div class="message_box" id="message_box"></div>
<div class="panel">
<input type="text" name="name" id="name" placeholder="Your Name" maxlength="10" style="width:20%" />
<input type="text" name="message" id="message" placeholder="Message" maxlength="80" style="width:60%" />
<button id="send-btn">Send</button>
</div>
</div>
</body>
</html>
Server Working Application:
<?php
// set some variables
$host = "xx.xx.xxx.xx:";
$port = 25763;
// don't timeout!
set_time_limit(0);
// create socket
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die("Could not create socket\n");
// bind socket to port
socket_set_option($socket, SOL_SOCKET, SO_REUSEADDR, 1);
$result = socket_bind($socket, $host, $port) or die("Could not bind to socket\n");
// start listening for connections
$result = socket_listen($socket, 3) or die("Could not set up socket listener\n");
// accept incoming connections
// spawn another socket to handle communication
$spawn = socket_accept($socket) or die("Could not accept incoming connection\n");
// read client input
$input = socket_read($spawn, 1024) or die("Could not read input\n");
// clean up input string
$input = trim($input);
echo "Client Message : ".$input;
// reverse client input and send back
$output = strrev($input) . "\n";
echo $spawn;
socket_write($spawn, $output, strlen ($output)) or die("Could not write output\n");
// close sockets
socket_close($spawn);
socket_close($socket);
?>
I am trying to develop a websocket server in php.
Here is what I have done so far :
(server part)
$server = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
socket_set_option($server, SOL_SOCKET, SO_REUSEADDR, 1);
socket_bind($server, "localhost", 10000);
socket_listen($server);
$client = socket_accept($server);
$message = socket_read($client, 5000);
$matches = array();
preg_match('#Sec-WebSocket-Key: (.*)\r\n#', $message, $matches);
$new_key = new_key($matches[1]);
$new_message = "HTTP/1.1 101 Switching Protocols\r\n";
$new_message .= "Upgrade: websocket\r\n";
$new_message .= "Connection: Upgrade\r\n";
$new_message .= "Sec-WebSocket-Accept: " . $new_key . "\r\n\r\n";
socket_write($client, $new_message, strlen($new_message));
$new_message = "Test message !";
socket_write($client, $new_message, strlen($new_message));
function new_key($key)
{
$key .= "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
$key = sha1($key);
$new_key = '';
for ($i = 0; $i < strlen($key); $i+=2)
{
$new_key .= chr(intval($key[$i] . $key[$i+1], 16));
}
$new_key = base64_encode($new_key);
return $new_key;
}
/* End of file server.php */
(client part)
window.onload = function() {
var ws = new WebSocket('ws://localhost:10000');
ws.onopen = function() {
alert('Connection open !');
setInterval(function() {
ws.send('lol');
}, 1000);
}
ws.onclose = function() {
alert('WebSocket close !');
}
ws.onmessage = function(e) {
alert(e.data);
}
ws.onerror = function(e) {
alert('Error');
}
};
The first socket_write works perfectly (for the handshake) and the open event is triggered correctly. But the second socket_write doesn't work. I tried to do a ws.send on the open event with a second socket_read in server part, it doesn't work neither.
Thank you if you have an idea !
I think it is a INVALID_STATE_ERR: DOM Exception 11 meaning a sync problem. Try this in your client:
var test = function(){
var myWebSocket = new WebSocket('ws://localhost:10000');
myWebSocket.onopen = function(e){
alert('connection open');
this.send('test1');
this.send('test2');
}
myWebSocket.onmessage = function(e){ alert('message ' + e.data) };
myWebSocket.onclose = function(e){ alert('connection closed'); this.close(); };
myWebSocket.send('test3');
};
test3 will fail because it is an asynchronous websocket.
I had a similar issue. After checking out this project over here https://github.com/srchea/PHP-Push-WebSocket I noticed a function called "encode" in this file https://github.com/srchea/PHP-Push-WebSocket/blob/master/lib/Server.class.php before sending the message.
So try to change this
socket_write($client, $new_message, strlen($new_message));
$new_message = "Test message !";
socket_write($client, $new_message, strlen($new_message));
to this
socket_write($client, $new_message, strlen($new_message));
$new_message = "Test message !";
socket_write($client, chr(129) . chr(strlen($new_message)) ."". $new_message);