无法使用PHP客户端从Java套接字服务器读取响应 [英] Cannot read response from Java socket server using PHP client

问题描述

我有一个用Java编写的服务器。它是一个简单的，当客户端连接时回显HELLO，然后回显客户端发送的任何回复。代码如下：

I have a server written in Java. Its a simple one that echoes "HELLO" when a client connects and then echoes back any reply the client sends. The code is below:

ServerSocket ss=new ServerSocket(2001);
while(true) {
  Socket s=ss.accept();
  BufferedReader in=new BufferedReader(new InputStreamReader(s.getInputStream()));
  PrintWriter out=new PrintWriter(s.getOutputStream(),true);
  out.println("HELLO");
  String msg=in.readLine();
  out.println(msg);
}

我有一个PHP脚本连接到服务器：

I have a PHP script that connects to the server:

<?php
  $socket=socket_create(AF_INET,SOCK_STREAM,getprotobyname('tcp'));
  socket_connect($socket,'127.0.0.1',2001);
  $msg=socket_read($socket,10);
  echo socket_write($socket,'I am the client.');
  $msg=socket_read($socket,20);
  echo $msg;
?>

我从服务器收到HELLO消息，服务器也得到I是客户端消息，但PHP客户端没有得到回复。

I am getting the "HELLO" message from the server, and the server is also getting the "I am the client" message, but the PHP client is not getting the reply back. What am I doing wrong here?

推荐答案

in.readLine（）

除非 socket_write 在PHP中隐式添加行终止符你需要自己这样做，以便Java端看到你已经写了一整行文本。

Unless socket_write in PHP implicitly adds a line terminator, you'll need to do so yourself, so that the Java side sees that you've written a complete line of text.

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