使用fgets/fread从fsockopen读取数据

Question

这是我正在使用的代码:

if (!($fp = fsockopen('ssl://imap.gmail.com', '993', $errno, $errstr, 15)))
    echo "Could not connect to host";
$server_response = fread($fp, 256);
echo $server_response;

fwrite($fp, "C01 CAPABILITY"."\r\n");
while (!feof($fp)) {
    echo fgets($fp, 256);
}

我收到了第一个回复:

OK Gimap ready for requests from xx.xx.xx.xx v3if9968808ibd.15 

但随后页面超时.我搜索了stream_set_blocking,stream_set_timeout,stream_select,fread等,但无法让它工作.我需要读取服务器发送的所有数据,然后继续执行其他命令(我将使用imap检索电子邮件).

谢谢

Answer 1

您的脚本最后挂在while循环中.这是因为您已将其用作!feof()循环的条件,并且服务器未关闭连接.这意味着feof()将始终返回false并且循环将永远继续.

当您编写完整的实现时,这不会有问题,因为您将查找响应代码并相应地突破循环,例如:

<?php

  // Open a socket
  if (!($fp = fsockopen('ssl://imap.gmail.com', 993, $errno, $errstr, 15))) {
      die("Could not connect to host");
  }

  // Set timout to 1 second
  if (!stream_set_timeout($fp, 1)) die("Could not set timeout");

  // Fetch first line of response and echo it
  echo fgets($fp);

  // Send data to server
  echo "Writing data...";
  fwrite($fp, "C01 CAPABILITY\r\n");
  echo " Done\r\n";

  // Keep fetching lines until response code is correct
  while ($line = fgets($fp)) {
    echo $line;
    $line = preg_split('/\s+/', $line, 0, PREG_SPLIT_NO_EMPTY);
    $code = $line[0];
    if (strtoupper($code) == 'C01') {
      break;
    }
  }

  echo "I've finished!";