php websocket 服务器会在 apache 中运行吗？

Posted 2023-02-16

【中文标题】php websocket 服务器会在 apache 中运行吗？

【英文标题】：will php websocket server run in apache?

【发布时间】：2016-09-19 03:28:52

【问题描述】：

我参考了本教程并设法在我的本地主机中运行了简单的聊天应用程序。 https://www.sanwebe.com/2013/05/chat-using-websocket-php-socket

我想了解某件事：

我正在考虑从彗星长轮询技术切换到这个 websocket(php) 由于我心中只有一个问题是不运行 在阿帕奇。我了解到 Apache 不是实时的正确选择 东西。它为每个连接创建请求，因此占用大量内存 这极大地降低了我的电脑速度。

我希望上述教程中的 websocket 不会以任何方式处理 apache。它应该在自己的独立服务器上运行。

但我无法确定它是单独运行还是利用 apache 因为我对 websocket 和实时的东西很陌生。

1) 握手：

var wsUri = "ws://localhost:9000/server.php";   

这里，server.php 应该是后台运行的进程，那么它是在 Apache 上运行的吗？

既然是在后台运行，是不是也叫daemon？当我了解到共享主机会找到守护进程并将其杀死时，我仍然可以按照上面的教程在共享主机中实现 php websocket 吗？还是有更好的办法？

server.php

<?php
$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
$clients = array($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));

【参考方案1】：

简答

不，server.php 不像你说的那样在 Apache 中运行。 不，大多数共享主机不允许您打开 9000 端口。您需要联系系统管理员，如果预算不足，您可以订阅 VPS 服务。

【讨论】：

感谢您让他们知道它不能在 Apache 上运行。那么，这个端口 9000 代表什么？它是专门为 websocket 设计的吗？或者如果可能的话，您可以直接查看有关选择端口的信息吗？

据我所知，Websocket协议没有定义具体的端口tools.ietf.org/html/rfc6455