php WebSocket 新旧协议收发数据的问题

程序员文章站 2024-04-03 08:24:34

...

class WebSocket{
var $master;
var $sockets = array();
var $users = array();
var $debug = false;

function __construct($address,$port){
error_reporting(E_ALL);
set_time_limit(0);
ob_implicit_flush();
$this->master=socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die("socket_create() failed");
socket_set_option($this->master, SOL_SOCKET, SO_REUSEADDR, 1) or die("socket_option() failed");
socket_bind($this->master, $address, $port) or die("socket_bind() failed");
socket_listen($this->master,20) or die("socket_listen() failed");
$this->sockets[]=$this->master;
$this->say("Server Started : ".date('Y-m-d H:i:s'));
$this->say("Listening on : ".$address." port ".$port);
$this->say("Master socket : ".$this->master."\n");
while(true){
$changed = $this->sockets;
$write=NULL;
$except=NULL;
socket_select($changed,$write,$except,NULL);
foreach($changed as $socket){
if($socket==$this->master){
$client=socket_accept($this->master);
if($clientsay("socket_accept() failed"); continue; }
else{ $this->connect($client); }
}
else{
$bytes = @socket_recv($socket,$buffer,2048,0);
if($bytes==0){ $this->disconnect($socket); }
else{
$this->say('Their Words: '.$buffer);
$user = $this->getuserbysocket($socket);
if(!$user->handshake){ $this->dohandshake($user,$buffer); }
else{ $this->process($user,$this->unwrap($buffer)); }
}
}
}
}
}
function process($user,$msg){
/* Extend and modify this method to suit your needs */
/* Basic usage is to echo incoming messages back to client */
$this->send($user->socket,$msg);
}
function send($client,$msg){
$this->say("> ".$msg);
$msg = $this->wrap($msg);
socket_write($client,$msg,strlen($msg));
$this->say("! ".strlen($msg));
}
function connect($socket){
$user = new User();
$user->id = uniqid();
$user->socket = $socket;
array_push($this->users,$user);
array_push($this->sockets,$socket);
$this->say($socket." CONNECTED!");
$this->say(date("d/n/Y ")."at ".date("H:i:s T"));
}
function disconnect($socket){
$found=null;
$n=count($this->users);
for($i=0;$i if($this->users[$i]->socket==$socket){ $found=$i; break; }
}
if(!is_null($found)){ array_splice($this->users,$found,1); }
$index=array_search($socket,$this->sockets);
socket_close($socket);
$this->say($socket." DISCONNECTED!");
if($index>=0){ array_splice($this->sockets,$index,1); }
}
/*Old way:
function dohandshake($user,$buffer){
$this->say("\nRequesting handshake...");
$this->say($buffer);
list($resource,$host,$origin,$key1,$key2,$l8b) = $this->getheaders($buffer);
$this->say("Handshaking...");
//$port = explode(":",$host);
//$port = $port[1];
//$this->say($origin."\r\n".$host);
$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" .
$this->calcKey($key1,$key2,$l8b) . "\r\n";// .
//"\r\n";
socket_write($user->socket,$upgrade.chr(0),strlen($upgrade.chr(0)));
$user->handshake=true;
$this->say($upgrade);
$this->say("Done handshaking...");
return true;
}*/
function dohandshake($user,$buffer){
$this->say("\nStart ShakeHanding\nFollowing is from client\n");
$this->say($buffer);
$this->say("\nFollowing is ours\n");
if(preg_match("/Sec-WebSocket-Key1/",$buffer)){
list($resource,$host,$origin,$key1,$key2,$l8b) = $this->getheaders($buffer);
$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 . $resource . "\r\n" .
"\r\n" .$this->calcKey($key1,$key2,$l8b) . "\r\n";
}
elseif(preg_match("/Sec-WebSocket-Key:/",$buffer)){
preg_match("/Sec-WebSocket-Key: (.*)\r\n/",$buffer,$match);
$key=$match[1];
$acceptKey=base64_encode(sha1($key.'258EAFA5-E914-47DA-95CA-C5AB0DC85B11',true));
$upgrade="HTTP/1.1 101 Switching Protocols\r\n".
"Upgrade: websocket\r\n".
"Connection: Upgrade\r\n".
"Sec-WebSocket-Accept: ".$acceptKey."\r\n\r\n";
}
$this->say($upgrade);
socket_write($user->socket,$upgrade.chr(0),strlen($upgrade.chr(0)));
$user->handshake=true;
$this->say("Finish ShakeHanding.");
return true;
}
function calcKey($key1,$key2,$l8b){
//Get the numbers
preg_match_all('/([/d]+)/', $key1, $key1_num);
preg_match_all('/([/d]+)/', $key2, $key2_num);
//Number crunching [/bad pun]
$this->say("Key1: " . $key1_num = implode($key1_num[0]) );
$this->say("Key2: " . $key2_num = implode($key2_num[0]) );
//Count spaces
preg_match_all('/([ ]+)/', $key1, $key1_spc);
preg_match_all('/([ ]+)/', $key2, $key2_spc);
//How many spaces did it find?
$this->say("Key1 Spaces: " . $key1_spc = strlen(implode($key1_spc[0])) );
$this->say("Key2 Spaces: " . $key2_spc = strlen(implode($key2_spc[0])) );
if($key1_spc==0|$key2_spc==0){ $this->say("Invalid key");return; }
//Some math
$key1_sec = pack("N",$key1_num / $key1_spc); //Get the 32bit secret key, minus the other thing
$key2_sec = pack("N",$key2_num / $key2_spc);
//This needs checking, I'm not completely sure it should be a binary string
return md5($key1_sec.$key2_sec.$l8b,1); //The result, I think
}

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-Key1: (.*)\r\n/",$req,$match)){ $this->say("Sec Key1: ".$sk1=$match[1]); }
if(preg_match("/Sec-WebSocket-Key2: (.*)\r\n/",$req,$match)){ $this->say("Sec Key2: ".$sk2=$match[1]); }
if($match=substr($req,-8)) { $this->say("Last 8 bytes: ".$l8b=$match); }
return array($r,$h,$o,$sk1,$sk2,$l8b);
}
function getuserbysocket($socket){
$found=null;
foreach($this->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); }
}
class User{
var $id;
var $socket;
var $handshake;
}

（请格式化上面的代码）

以上的代码源自http://blog.csdn.net/trace332/article/details/6325986

不过很明显，CSDN的那位楼主有许多语法错误，还有WebSocket的协议版本低。

我修改后新旧协议都能正常实现握手，不过关于收发数据还是无从下手，恳请大虾们赐教一二.

(新协议收发的是二进制数据，详细的另见其他文献)

（我只想收发UTF-8字符）

（请也做到新旧都能兼容）

（谢谢！）

相关标签： php WebSocket 新旧协议收发数据问题 c

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