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Bad response (Integration On Websites)

(Sasha Klymenko) #1

Hi! I use example (
When I send request I receive ‘Error: couldn’t connect to host’
PHP - 5.5

(Daniel Naber) #2

Is your site accessible on the web? Then please post the URL and we could try to debug it.

(Sasha Klymenko) #3

Thanks for answer!
Problem is related to port (Our provider closed port 8081)

(Daniel Naber) #4

How exactly does your proxy.php script look like?

(Sasha Klymenko) #5

// LanguageTool Proxy Script
// requires curl for PHP - on Ubuntu, install with "sudo apt-get install php5-curl"

function shutdown($curl) {
  // close curl even if the script was aborted, see

  $postText = trim(file_get_contents('php://input'));
  $postText = html_entity_decode($postText, ENT_COMPAT, "UTF-8");
  $curl = curl_init();
  try {
    register_shutdown_function('shutdown', $curl);
    curl_setopt($curl, CURLOPT_URL, "");
    curl_setopt($curl, CURLOPT_PORT, 8081);
    curl_setopt($curl, CURLOPT_POST, true);
    curl_setopt($curl, CURLOPT_POSTFIELDS, $postText);
    curl_setopt($curl, CURLOPT_HEADER, 0);
    if (isset($_SERVER['HTTP_REFERER'])) {
      curl_setopt($curl, CURLOPT_REFERER, $_SERVER['HTTP_REFERER']);
    $realIp = $_SERVER['REMOTE_ADDR'];
    curl_setopt($curl, CURLOPT_HTTPHEADER, array("X-forwarded-for: $realIp"));
    header("Content-Type: text/xml; charset=utf-8");
    //for debugging:
    //header("Content-Type: text/plain");
    if (curl_exec($curl) === false) {
      $errorMessage = curl_error($curl);
      $errorCode = curl_errno($curl);
      if (!$errorMessage && $errorCode == 7) {
        // Actually the message can be empty, e.g. if the Apache server is in "No buffer space available" state...
        $errorMessage = "Could not connect LanguageTool server";   // source:
      print "Error: " . $errorMessage;
      error_log("proxy.php error: $errorMessage, code: $errorCode");
  } finally {
} else {
  print "Error: this proxy only supports POST requests";

(Daniel Naber) #6

So it seems couldn't connect to host means exactly that: your server cannot connect You could try logging into your server and call that URL with a command-line based browser like w3m or lynx. If that also doesn’t work, there’s maybe a Firewall that prevents access.