php - 本地主机(在自定义端口)在 POST 请求后返回空数据

Question

我正在尝试使用 PHP 从本地服务器 localhost 读取数据，但它似乎没有返回任何数据。这是我的完整脚本。

<?php
  $address = "localhost";
  echo "Attempting to open the socket at ".$address."...\n";
  $fp = fsockopen($address, 49801, $errno, $errstr, 10);
  echo "Error number is "; echo $errno; echo ".\n";
  echo "Error string is ".$errstr.".\n";
  echo "Attempt complete.\n";
  if ($fp) {
      print "Socket in now open.\n";
      syslog(LOG_INFO, "socket.php: Reaching the specified address...");
      print "Writing requests...\n"; //Hangs for about 1-2 minutes
      fwrite($fp, "POST / HTTP/1.0\r\nUser-Agent: PHP XMLRPC 1.0\r\nHost: ".$address."Content-Type: text/xml\r\nContent-Length: ".strlen($payload)."\r\n\r\n");
      $msg = "";
      while($data = fread($fp, 32768)) {
          $msg= $msg.$data;
      }
      if (strlen($msg) != 0) { 
          print "Final message: ***".$msg."***\n"; 
      } else { 
          print "There is no data received from '".$address."'\n"; 
      }
    fclose($fp);
  } else {
    print "Error\n";
  }
?>

这是我在终端中得到的输出:

Attempting to open the socket at localhost...
Error number is 0.
Error string is .
Attempt complete.
Socket in now open.
Writing requests...
There is no data received from 'localhost'

如上面脚本中所述，倒数第二行 Writing requests... 挂起大约 1 或 2 分钟，然后附加一个空字符串。

我觉得这很好奇，因为这个脚本在 HTTP 的端口 80 或 SSH 的端口 22 上运行良好。我限制了对 localhost:49801 的配置的访问，因此无法进行服务器配置的任何更改。

然而，我想知道服务器的配置是否有问题，这样我就不用再费心了。

顺便说一句，我在 CentOS 7 上运行 PHP 5.4。

编辑
“Content-Length: 111”中的“111”是一个任意数字，取决于负载的字符串长度。

感谢您的帮助!

Answer 1

你没有得到服务器的回复，因为他正在等待你的 111 字节数据。

如果您向您的服务器发送正确数量的数据，他将做出相应的响应。

下面是我将 Content-Length 更改为 9

的工作示例

然后我使用 fwrite 发送 9 位数据:

<?php
  $address = "localhost";
  $payload = "Some data";
  echo "Attempting to open the socket at ".$address."...\n";
  $fp = fsockopen($address, 49801, $errno, $errstr, 10);
  echo "Error number is "; echo $errno; echo ".\n";
  echo "Error string is ".$errstr.".\n";
  echo "Attempt complete.\n";
  if ($fp) {
      print "Socket in now open.\n";
      syslog(LOG_INFO, "socket.php: Reaching the specified address...");
      print "Writing requests...\n";

      fwrite($fp, "POST / HTTP/1.0\r\nUser-Agent: PHP XMLRPC 1.0\r\nHost: ".$address.
      "\r\nContent-Type: text/xml\r\nContent-Length: ". strlen($payload) ."\r\n\r\n");
      //We send the data to the server
      fwrite($fp, $payload);

      $msg = "";
      while($data = fread($fp, 32768)) {
          $msg= $msg.$data;
      }
      if (strlen($msg) != 0) { 
          print "Final message: ***".$msg."***\n"; 
      } else { 
          print "There is no data received from '".$address."'\n"; 
      }
    fclose($fp);
  } else {
    print "Error\n";
  }
?>