我正在尝试为我的web应用程序设置WebSocket。我在谷歌上找到了一些文档和示例，但我不太明白当套接字打开时，我应该怎么发送额外的数据
我想要一个包含用户套接字和用户id的User数组，但我不能在套接字打开时用JavaScript发送用户id，并在服务器上用PHP获取该用户id。我的应用程序必须向由UserID标识的特定客户端发送消息（UserID存储在DB中，但我认为JS中的客户端代码通常可以发送消息）
目前我有一个套接字列表，但我想用一个包含id和套接字的用户列表来代替它。
PHP服务器代码
$host = 'localhost'; //host
$port = '9000'; //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
$sockets = array($socket);
$users = array();
//$clients = array($socket);
//start endless loop, so that our script doesn't stop
while (true) {
//manage multipal connections
$changed = $sockets;
//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
// HERE I NEED USER ID BUT I DON'T FIND HOW TO GET IT
$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_id = $tst_msg->iduser;
$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("/rn/", $receved_header);
foreach ($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 Handshakern" .
"Upgrade: websocketrn" .
"Connection: Upgradern" .
"WebSocket-Origin: $hostrn" .
"WebSocket-Location: ws://$host:$port/demo/shout.phprn" .
"Sec-WebSocket-Accept:$secAcceptrnrn";
socket_write($client_conn, $upgrade, strlen($upgrade));
}
function getSocketbyIdUser($idU) {
global $clients;
foreach ($clients as $client) {
if ($client->getIdUser() == $idU) {
return $client->getSocket();
}
}
return false;
}
function userIsConnected($idU) {
global $clients;
return getSocketbyIdUser($idU) != false;
}
function getSocketsArray() {
global $clients;
$sockets[];
foreach ($clients as $client) {
$sockets[] = $client->getSocket();
}
return $sockets;
}
class Client {
private $idUser;
private $socket;
public function getIdUser() {
return self::$idUser;
}
public function getSocket() {
return self::$socket;
}
}
JS代码
$(document).ready(function(){
//create a new WebSocket object.
var wsUri = "ws://localhost:9000/server/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>");};
});
将您的附加数据发送到websocket，如下所示：ws://yoursite:port/?param1=value;在服务器中：
if (preg_match("/GET (.*) HTTP/", $receved_header, $match)) {
$root = $match[1];
$userid = explode('param1=', $root);
if (!empty($userid) && array_key_exists(1, $param1))
$this->userid = $userid[1];
}
它对我有用…试试