我在服务器端使用PHP Web套接字。我目前只测试客户端和服务器之间的连接，所以我还没有配置套接字以响应特定事件。这就是基本模板的样子：
#!/php -q
<?php /* >php -q server.php */
error_reporting(E_ALL);
set_time_limit(0);
ob_implicit_flush();
$master = WebSocket("example.com",8080);
$sockets = array($master);
$users = array();
$debug = false;
while(true){
$changed = $sockets;
socket_select($changed,$write=NULL,$except=NULL,NULL);
foreach($changed as $socket){
if($socket==$master){
$client=socket_accept($master);
if($client<0){ console("socket_accept() failed"); continue; }
else{ connect($client); }
}
else{
$bytes = @socket_recv($socket,$buffer,2048,0);
if($bytes==0){ disconnect($socket); }
else{
$user = getuserbysocket($socket);
if(!$user->handshake){ dohandshake($user,$buffer); }
else{ process($user,$buffer); }
}
}
}
}
//---------------------------------------------------------------
function process($user,$msg){
$action = unwrap($msg);
say("< ".$action);
switch($action){
case "hello" : send($user->socket,"hello human"); break;
case "hi" : send($user->socket,"zup human"); break;
case "name" : send($user->socket,"my name is Multivac, silly I know"); break;
case "age" : send($user->socket,"I am older than time itself"); break;
case "date" : send($user->socket,"today is ".date("Y.m.d")); break;
case "time" : send($user->socket,"server time is ".date("H:i:s")); break;
case "thanks": send($user->socket,"you're welcome"); break;
case "bye" : send($user->socket,"bye"); break;
default : send($user->socket,$action." not understood"); break;
}
}
function send($client,$msg){
say("> ".$msg);
$msg = wrap($msg);
socket_write($client,$msg,strlen($msg));
}
function WebSocket($address,$port){
$master=socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die("socket_create() failed");
socket_set_option($master, SOL_SOCKET, SO_REUSEADDR, 1) or die("socket_option() failed");
socket_bind($master, $address, $port) or die("socket_bind() failed");
socket_listen($master,20) or die("socket_listen() failed");
echo "Server Started : ".date('Y-m-d H:i:s')."\n";
echo "Master socket : ".$master."\n";
echo "Listening on : ".$address." port ".$port."\n\n";
return $master;
}
function connect($socket){
global $sockets,$users;
$user = new User();
$user->id = uniqid();
$user->socket = $socket;
array_push($users,$user);
array_push($sockets,$socket);
console($socket." CONNECTED!");
}
function disconnect($socket){
global $sockets,$users;
$found=null;
$n=count($users);
for($i=0;$i<$n;$i++){
if($users[$i]->socket==$socket){ $found=$i; break; }
}
if(!is_null($found)){ array_splice($users,$found,1); }
$index = array_search($socket,$sockets);
socket_close($socket);
console($socket." DISCONNECTED!");
if($index>=0){ array_splice($sockets,$index,1); }
}
function dohandshake($user,$buffer){
console("\nRequesting handshake...");
console($buffer);
list($resource,$host,$origin,$strkey1,$strkey2,$data) = getheaders($buffer);
console("Handshaking...");
$pattern = '/[^\d]*/';
$replacement = '';
$numkey1 = preg_replace($pattern, $replacement, $strkey1);
$numkey2 = preg_replace($pattern, $replacement, $strkey2);
$pattern = '/[^ ]*/';
$replacement = '';
$spaces1 = strlen(preg_replace($pattern, $replacement, $strkey1));
$spaces2 = strlen(preg_replace($pattern, $replacement, $strkey2));
if ($spaces1 == 0 || $spaces2 == 0 || $numkey1 % $spaces1 != 0 || $numkey2 % $spaces2 != 0) {
socket_close($user->socket);
console('failed');
return false;
}
$ctx = hash_init('md5');
hash_update($ctx, pack("N", $numkey1/$spaces1));
hash_update($ctx, pack("N", $numkey2/$spaces2));
hash_update($ctx, $data);
$hash_data = hash_final($ctx,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" .
"\r\n" .
$hash_data;
socket_write($user->socket,$upgrade.chr(0),strlen($upgrade.chr(0)));
$user->handshake=true;
console($upgrade);
console("Done handshaking...");
return true;
}
function getheaders($req){
$r=$h=$o=null;
if(preg_match("/GET (.*) HTTP/" ,$req,$match)){ $r=$match[1]; }
if(preg_match("/Host: (.*)\r\n/" ,$req,$match)){ $h=$match[1]; }
if(preg_match("/Origin: (.*)\r\n/",$req,$match)){ $o=$match[1]; }
if(preg_match("/Sec-WebSocket-Key2: (.*)\r\n/",$req,$match)){ $key2=$match[1]; }
if(preg_match("/Sec-WebSocket-Key1: (.*)\r\n/",$req,$match)){ $key1=$match[1]; }
if(preg_match("/\r\n(.*?)\$/",$req,$match)){ $data=$match[1]; }
return array($r,$h,$o,$key1,$key2,$data);
}
function getuserbysocket($socket){
global $users;
$found=null;
foreach($users as $user){
if($user->socket==$socket){ $found=$user; break; }
}
return $found;
}
function say($msg=""){ echo $msg."\n"; }
function wrap($msg=""){ return chr(0).$msg.chr(255); }
function unwrap($msg=""){ return substr($msg,1,strlen($msg)-2); }
function console($msg=""){ global $debug; if($debug){ echo $msg."\n"; } }
class User{
var $id;
var $socket;
var $handshake;
}
?>
我想用Socket.io连接到我的Swift客户端的套接字：
let io:SocketIOClient = SocketIOClient(socketURL: URL(string: "example.com:8080/server.php")!, config: [.log(true), .compress])
override func viewDidLoad() {
super.viewDidLoad()
self.io.on(clientEvent: .connect) { (data:[Any], ack:SocketAckEmitter) in
NSLog("Socket connected!")
}
self.io.on(clientEvent: .disconnect) { (data:[Any], ack:SocketAckEmitter) in
NSLog("Socket disconnected!")
}
self.io.connect()
}
我正在使用SSH在我的Mac终端上运行服务器。 PHP Web套接字表示它正在监听连接，但它没有响应socket.io连接。服务器和客户端都给我任何错误，因此我假设我错过了连接过程中的关键步骤。我想知道当你尝试连接到PHP网络套接字时，是否可以与Socket.IO swift客户端进行握手。这是兼容性问题还是我忘记了什么？顺便说一下，到目前为止你可能已经注意到我对网络套接字编程很新（我不到一周前发现了websockets），所以请原谅我这是否是一个真正的noob问题。我感谢任何帮助。谢谢！
答案 0 :(得分：0)
socket.io != webSocket。您无法将socket.io客户端连接到webSocket服务器。 Socket.io在webSocket之上添加了自己的协议。虽然socket.io在封面下使用webSocket传输，但如果您只有一个webSocket服务器，则客户端将无法连接。
您必须将webSocket客户端连接到webSocket服务器。或者，将socket.io客户端连接到socket.io服务器。
因此，在您的情况下，如果您有一个socket.io客户端，那么您需要为您的服务器环境获取一个socket.io服务器并使用它。