/**
* Send the given string of data to the server.
*
* @param string $data The string of data to send.
*
* @return mixed True on success or a PEAR_Error object on failure.
*
* @access private
* @since 1.0
*/
function _send($data)
{
if ($this->_socket->eof()) {
return new PEAR_Error('Failed to write to socket: (connection lost!) ');
}
if (PEAR::isError($error = $this->_socket->write($data))) {
return new PEAR_Error('Failed to write to socket: ' . $error->getMessage());
}
if ($this->_debug) {
// C: means this data was sent by the client (this class)
echo "C: " . date("H:i:s") . " " . htmlspecialchars($data) . "\n";
$this->dbgDialog .= "C: {$data}";
}
return true;
}
/**
* Send the given string of data to the server.
*
* @param string $data The string of data to send.
*
* @return mixed True on success or a PEAR_Error object on failure.
*
* @access private
* @since 1.0
*/
function _send($data)
{
if ($this->_socket->eof()) {
return new PEAR_Error('Failed to write to socket: (connection lost!)');
}
if (PEAR::isError($error = $this->_socket->write($data))) {
return new PEAR_Error('Failed to write to socket: ' . $error->getMessage());
}
if ($this->_debug) {
// C: means this data was sent by the client (this class)
echo 'C: ' . $data;
$this->dbgDialog .= 'C: ' . $data;
}
return true;
}
/**
* remove host from hosts file.
*
* @param string The $host to be removed to the hosts file
*
* @throws RuntimeException if host does not exists or cant write to file
*
* @return bool
**/
public function remove($host)
{
$this->validHost($host);
if (!$this->check($host)) {
throw new \RuntimeException('Host does not exists in the file');
}
$this->backup();
$tmpFilePath = $this->filepath . '.tmp';
$tmpFile = new \SplFileObject($tmpFilePath, 'w+');
$this->file->rewind();
while (!$this->file->eof()) {
$pattern = '/\\b' . $host . '\\b/i';
if (!preg_match($pattern, $this->file->current())) {
$tmpFile->fwrite($this->file->current());
}
$this->file->next();
}
copy($tmpFilePath, $this->filepath);
unlink($tmpFilePath);
return true;
}
/**
* Get data until a line with only a '.' in it is read and return data.
*
* @return mixed (array) text response on success or (object) pear_error on failure
* @access private
*/
function _getTextResponse()
{
$data = array();
$line = '';
// Continue until connection is lost
while (!$this->_socket->eof()) {
// Retrieve and append up to 1024 characters from the server.
$line .= $this->_socket->gets(1024);
if (PEAR::isError($line)) {
return PEAR::throwError('Failed to read from socket!', null, $line->getMessage());
}
// Continue if the line is not terminated by CRLF
if (substr($line, -2) != "\r\n" || strlen($line) < 2) {
continue;
}
// Validate recieved line
if (false) {
// Lines should/may not be longer than 998+2 chars (RFC2822 2.3)
if (strlen($line) > 1000) {
return PEAR::throwError('Invalid line recieved!', null);
}
}
// Remove CRLF from the end of the line
$line = substr($line, 0, -2);
// Check if the line terminates the textresponse
if ($line == '.') {
// return all previous lines
return $data;
break;
}
// If 1st char is '.' it's doubled (NNTP/RFC977 2.4.1)
if (substr($line, 0, 2) == '..') {
$line = substr($line, 1);
}
// Add the line to the array of lines
$data[] = $line;
// Reset/empty $line
$line = '';
}
return PEAR::throwError('Data stream not terminated with period', null);
}
/**
* Setup default cryptographic key for encrypt/decrypt operations
*
* @param string|resource|SplFileObject $cryptoKey cryptographic key or file
*
* @return $this
*/
public function setCryptoKey($cryptoKey)
{
if ($cryptoKey instanceof SplFileObject) {
$key = [];
while (!$cryptoKey->eof()) {
$key[] = $cryptoKey->fgets();
}
$this->cryptoKey = implode('', $key);
} else {
if (is_resource($cryptoKey) && get_resource_type($cryptoKey) == 'stream') {
$this->cryptoKeyResource = $cryptoKey;
$key = [];
while (!feof($cryptoKey)) {
$key[] = fgets($cryptoKey);
}
$this->cryptoKey = implode('', $key);
} else {
if ((is_string($cryptoKey) || is_numeric($cryptoKey)) && @file_exists($cryptoKey)) {
$this->cryptoKey = file_get_contents($cryptoKey);
} else {
$this->cryptoKey = $cryptoKey;
}
}
}
if (is_array($cryptoKey)) {
$this->cryptoKey = implode('', $cryptoKey);
$this->key = isset($cryptoKey['key']) ? $cryptoKey['key'] : array_shift($cryptoKey);
$this->iv = isset($cryptoKey['iv']) ? $cryptoKey['iv'] : array_shift($cryptoKey);
} else {
list($this->key, $this->iv) = $this->splitKeyIv();
}
return $this;
}
