本地主机（在自定义端口）returns POST 请求后的空数据

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'

如上面的脚本所述，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。我限制访问 localhost:49801 的配置，因此无法对服务器的配置。

不过我想知道是不是服务器的配置有问题，这样我就不用再折腾一天了。

顺便说一句，我是运行 PHP CentOS 7 上的 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

您的服务器没有回复您，因为他正在等待您的 111 字节数据。

如果您向您的服务器发送正确数量的数据，他会做出相应的响应。

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";
  }
?>

本地主机（在自定义端口）returns POST 请求后的空数据

localhost (at custom port) returns empty data after POST request

php

post

localhost