java - 从 Java 套接字向 PHP 服务器套接字发送消息

Question

我有一个套接字监听 PHP 中的某个端口，并且我尝试使用 Java 中的套接字发送字符串，但我不断收到以下错误:

Warning: socket_recv(): unable to read from socket [0]: The operation completed successfully.
 in H:\Dropbox\EISTI\www\java-instagram-web\src\Client\Component\Server\Client.php on line 55

如果没有更多的描述，很难理解问题所在。

我的 PHP 类如下所示:

class Client {
    private $address;
    private $port;
    private $command;

    public function __construct($port, $address, $addressServer, $portServer, $command)
    {
        set_time_limit(0);
        $this->address = $address;
        $this->port = $port;
        $this->init();
    }

    private function init(){

        //Create socket
        if (! $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) {
            $this->showError('socket create');
        }
        echo "Server Created\n";

        //Bind socket
        if (!socket_bind($socket, $this->address, $this->port)) {
            $this->showError('socket bind');
        }
        echo "Server bind to $this->address and $this->port \n";

        if (!socket_listen($socket)) {
            $this->showError('socket listen');
        }
        echo "Server Listening \n";

        do {
            $client = socket_accept($socket);
            echo "connection established\n";

            $message = "\n Hey! welcome to the server\n";
            socket_write($client, $message, strlen($message));

            do {
                if (! socket_recv($socket, $clientMessage, 2045, MSG_WAITALL)) {
                    $this->showError('socket receive');
                }
                $message = "Command Received\n";
                echo $clientMessage;

                socket_send($client, $message, strlen($message), 0);

                if (!$clientMessage = trim($clientMessage)) {
                    continue;
                }

                if (trim($clientMessage) == 'close') {
                    socket_close($client);
                    echo "\n\n--------------------------------------------\n".
                        "ClientRequest terminated\n";
                    break 1;
                }
            } while(true);

        } while(true);
    }

    private function showError($message) {
        echo ("Error: ".$message);
        exit(666);
    }
}

我的 Java 套接字类如下所示:

public class ResponseToClient {
    private String host;
    private int port;
    private Socket socket;
    private PrintStream theOut;
    private String resultLocation;

    /**
     * Constructor
     */
    public ResponseToClient(String path) {
        this.host = "localhost";
        this.port = 1000;
        this.resultLocation = path;
    }

    /**
     * Setting up Socket
     */
    public void init(){
        try{

            socket = new Socket(host, port);
            theOut = new PrintStream(socket.getOutputStream());

            //Send Command
            sendCommand();

            //Closing connections
            socket.close();
            theOut.close();

        }
        catch (IOException e){
            e.printStackTrace();
        }
    }

    /**
     * Send Command
     */
    public void sendCommand()
    {
        theOut.println(Messages.type_response + Messages.seperator_client + resultLocation);
        System.out.println(Messages.type_response + Messages.seperator_client + resultLocation);
    }
}

我做错了什么？

Answer 1

我认为问题在于您正在尝试从 PHP 端的服务器套接字读取数据，而不是客户端套接字:

socket_recv($socket, $clientMessage, 2045, MSG_WAITALL)

这应该是

socket_recv($client, $clientMessage, 2045, MSG_WAITALL)