function _GetResponse($fp, $client_ver)
{
$response = "";
$len = 0;
$header = fread($fp, 8);
if (strlen($header) == 8) {
list($status, $ver, $len) = array_values(unpack("n2a/Nb", $header));
$left = $len;
while ($left > 0 && !feof($fp)) {
$chunk = fread($fp, min(8192, $left));
if ($chunk) {
$response .= $chunk;
$left -= strlen($chunk);
}
}
}
if ($this->_socket === false) {
fclose($fp);
}
// check response
$read = strlen($response);
if (!$response || $read != $len) {
$this->_error = $len ? "failed to read searchd response (status={$status}, ver={$ver}, len={$len}, read={$read})" : "received zero-sized searchd response";
return false;
}
// check status
if ($status == SEARCHD_WARNING) {
list(, $wlen) = unpack("N*", substr($response, 0, 4));
$this->_warning = substr($response, 4, $wlen);
return substr($response, 4 + $wlen);
}
if ($status == SEARCHD_ERROR) {
$this->_error = "searchd error: " . substr($response, 4);
return false;
}
if ($status == SEARCHD_RETRY) {
$this->_error = "temporary searchd error: " . substr($response, 4);
return false;
}
if ($status != SEARCHD_OK) {
$this->_error = "unknown status code '{$status}'";
return false;
}
// check version
if ($ver < $client_ver) {
$this->_warning = sprintf("searchd command v.%d.%d older than client's v.%d.%d, some options might not work", $ver >> 8, $ver & 0xff, $client_ver >> 8, $client_ver & 0xff);
}
return $response;
}