如何使用 WebSocket 从 PHP 发送数据/文本进行处理?

2021-12-25 00:00:00 sockets websocket browser php

我在充当 WebSocket 服务器的服务器上有进程(不是用 Ratchet 编写的).我希望能够使用 PHP(作为客户端)向该进程发送数据.

I have process on server which acts as WebSocket server (not written in Ratchet). I want to be able to send data to this process using PHP (as client).

我发现了很多像这样作为 TCP 发送的示例:

I found a lot of examples to send as TCP like this:

<?php
  $addr = gethostbyname("localhost");

  $client = stream_socket_client("tcp://$addr:8887", $errno, $errorMessage);

  if ($client === false) {
      throw new UnexpectedValueException("Failed to connect: $errorMessage");
  }

  fwrite($client, "GET / HTTP/1.0
Host: localhost
Accept: */*

");
  echo stream_get_contents($client);
?>

我只需要向进程发送消息并关闭连接即可.我期望的结果是 webSocket 的结果稍后会打印或回显"到 PHP 页面.

All I need I to send message to the process and close the connection. The result that I expect is the result from the webSocket will be later printed or "echo" to the PHP page.

有没有办法让它在 php 中与 curl 一起工作?

Is there a way to make it work with curl in php?

推荐答案

我在 github 上找到了这段代码，(我找不到我从哪里得到它的确切 repo，因为我已经查看并尝试了很多)

I have found this code on github, (I can't find the exact repo where I got it from because I have looked and tried a lot of them)

<?php
class WebsocketClient {

    private $_Socket = null;

    public function __construct($host, $port) {
        $this->_connect($host, $port);
    }

    public function __destruct() {
        $this->_disconnect();
    }

    public function sendData($data) {
        // send actual data:
        fwrite($this->_Socket, "x00" . $data . "xff") or die('Error:' . $errno . ':' . $errstr);
        $wsData = fread($this->_Socket, 2000);
        $retData = trim($wsData, "x00xff");
        return $retData;
    }

    private function _connect($host, $port) {
        $key1 = $this->_generateRandomString(32);
        $key2 = $this->_generateRandomString(32);
        $key3 = $this->_generateRandomString(8, false, true);

        $header = "GET /echo HTTP/1.1
";
        $header.= "Upgrade: WebSocket
";
        $header.= "Connection: Upgrade
";
        $header.= "Host: " . $host . ":" . $port . "
";
        $header.= "Origin: http://localhost
";
        $header.= "Sec-WebSocket-Key1: " . $key1 . "
";
        $header.= "Sec-WebSocket-Key2: " . $key2 . "
";
        $header.= "
";
        $header.= $key3;


        $this->_Socket = fsockopen($host, $port, $errno, $errstr, 2);
        fwrite($this->_Socket, $header) or die('Error: ' . $errno . ':' . $errstr);
        $response = fread($this->_Socket, 2000);

        /**
         * @todo: check response here. Currently not implemented cause "2 key handshake" is already deprecated.
         * See: http://en.wikipedia.org/wiki/WebSocket#WebSocket_Protocol_Handshake
         */
        return true;
    }

    private function _disconnect() {
        fclose($this->_Socket);
    }

    private function _generateRandomString($length = 10, $addSpaces = true, $addNumbers = true) {
        $characters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!"§$%&/()=[]{}';
        $useChars = array();
        // select some random chars:    
        for ($i = 0; $i < $length; $i++) {
            $useChars[] = $characters[mt_rand(0, strlen($characters) - 1)];
        }
        // add spaces and numbers:
        if ($addSpaces === true) {
            array_push($useChars, ' ', ' ', ' ', ' ', ' ', ' ');
        }
        if ($addNumbers === true) {
            array_push($useChars, rand(0, 9), rand(0, 9), rand(0, 9));
        }
        shuffle($useChars);
        $randomString = trim(implode('', $useChars));
        $randomString = substr($randomString, 0, $length);
        return $randomString;
    }

}

$WebSocketClient = new WebsocketClient('localhost', 8887);
echo $WebSocketClient->sendData("MyUserNameFromPHP");
unset($WebSocketClient);
?>

在我尝试过的 7 个 php websocket 客户端中，这是我唯一能够使用的客户端.它不需要任何外部文件或框架.这是执行不需要持久连接到 webSocket 服务器的短命令的简单实现.

Out of 7 php websocket clients that I tried, this is the only one that I was able to work with. It doesn't requires any external files or frameworks. This is simple implementation for executing short command that doesn't require persistent connection to webSocket server.

希望能帮到你们，省时省力！！！

I hope it helps you guys , and you will save some time !!!

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