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newznab-tmux/libs/Net_NNTP/NNTP/Protocol/Client.php
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<?php
/**
*
*
* PHP versions 4 and 5
*
* <pre>
* +-----------------------------------------------------------------------+
* | |
* | W3C® SOFTWARE NOTICE AND LICENSE |
* | http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231 |
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* | This work (and included software, documentation such as READMEs, |
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* | portions thereof, including modifications: |
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* | 1. The full text of this NOTICE in a location viewable to users |
* | of the redistributed or derivative work. |
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* | the date changes were made. (We recommend you provide URIs to |
* | the location from which the code is derived.) |
* | |
* | THIS SOFTWARE AND DOCUMENTATION IS PROVIDED "AS IS," AND COPYRIGHT |
* | HOLDERS MAKE NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, |
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* +-----------------------------------------------------------------------+
* </pre>
*
* @category Net
* @package Net_NNTP
* @author Heino H. Gehlsen <heino@gehlsen.dk>
* @copyright 2002-2011 Heino H. Gehlsen <heino@gehlsen.dk>. All Rights Reserved.
* @license http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231
* W3C® SOFTWARE NOTICE AND LICENSE
* @version SVN: $Id: Client.php 330426 2013-05-31 14:41:46Z janpascal $
* @link http://pear.php.net/package/Net_NNTP
* @see
*/
require_once 'PEAR.php';
require_once 'Responsecode.php';
// {{{ constants
/**
* Default host
*
* @access public
* @ignore
*/
define('NET_NNTP_PROTOCOL_CLIENT_DEFAULT_HOST', 'localhost');
/**
* Default port
*
* @access public
* @ignore
*/
define('NET_NNTP_PROTOCOL_CLIENT_DEFAULT_PORT', '119');
// }}}
// {{{ Net_NNTP_Protocol_Client
/**
* Low level NNTP Client
*
* Implements the client part of the NNTP standard according to:
* - RFC 977,
* - RFC 2980,
* - RFC 850/1036, and
* - RFC 822/2822
*
* Each NNTP command is represented by a method: cmd*()
*
* WARNING: The Net_NNTP_Protocol_Client class is considered an internal
* class (and should therefore currently not be extended
* directly outside of the Net_NNTP package). Therefore its
* API is NOT required to be fully stable, for as long as such
* changes do not affect the public API of
* the Net_NNTP_Client class, which is considered stable.
*
* TODO: cmdListActiveTimes()
* cmdDistribPats()
*
* @category Net
* @package Net_NNTP
* @author Heino H. Gehlsen <heino@gehlsen.dk>
* @version package: 1.5.0 (stable)
* @version api: 0.9.0 (alpha)
* @access private
* @see Net_NNTP_Client
*/
class Net_NNTP_Protocol_Client extends PEAR
{
// {{{ properties
/**
* The socket resource being used to connect to the NNTP server.
*
* @var resource
* @access protected
*/
protected $_socket = null;
/**
* Contains the last received status response code and text.
*
* @var array
* @access protected
*/
protected $_currentStatusResponse = null;
/**
* Optional logger class to use for debugging.
*
* @var object
* @access private
*/
private $_logger = null;
/**
* Seconds to wait for the blocking socket to timeout.
*
* @var int
*/
protected $_socketTimeout = 120;
/**
* Constructor
*
* @access public
*/
public function Net_NNTP_Protocol_Client()
{
// Init PEAR.
parent::PEAR();
}
/**
* Get current package version.
*
* @access public
*/
public function getPackageVersion()
{
return '1.5.0';
}
/**
* Get current API version.
*
* @access public
*/
public function getApiVersion()
{
return '0.9.0';
}
/**
* Set the debug logger instance object.
*
* @param object $logger
*
* @access protected
*/
protected function setLogger($logger)
{
$this->_logger = $logger;
}
/**
* @deprecated
*/
public function setDebug($debug = true)
{
trigger_error(
'You are using deprecated API v1.0 in Net_NNTP_Protocol_Client: setDebug() ! Debugging in now automatically handled when a logger is given.',
E_USER_NOTICE
);
}
/**
* Send a command to usenet.
*
* Send a command to the server. A carriage return / linefeed
* (CRLF) sequence will be appended to each command string before it is sent to the IMAP server.
*
* @param string $cmd The command to launch, ie: "ARTICLE 1004853"
*
* @return mixed (int) response code on success
* (object) pear_error on failure
* @access protected
*/
protected function _sendCommand($cmd)
{
// NNTP/RFC977 only allows command up to 512 (-2) chars.
if (strlen($cmd) > 510) {
return $this->throwError('Failed writing to socket! (Command to long - max 510 chars)');
}
/***************************************************************
* Credit: *
* Thanks to Brendan Coles <bcoles@gmail.com> *
* (http://itsecuritysolutions.org) *
* For pointing out possibility to inject pipelined NNTP *
* commands into pretty much any Net_NNTP command-sending *
* function with user input, by appending a new line *
* character followed by the injection. *
***************************************************************
* Prevent new line (and possible future) characters in the NNTP
* commands Net_NNTP does not support pipelined commands.
* Inserting a new line character allows sending multiple
* commands and thereby making the communication between
* NET_NNTP and the server out of sync...
*/
if (preg_match_all('/\r?\n/', $cmd, $matches, PREG_PATTERN_ORDER)) {
if ($this->_logger) {
foreach ($matches[0] as $match) {
$this->_logger->debug(
"Illegal character in command: " . htmlentities(str_replace(array("\r", "\n"),
array("'Carriage Return'", "'New Line'"), $match
)
)
);
}
}
return $this->throwError("Illegal character(s) in NNTP command!");
}
// Check if connected.
if (!$this->_isConnected()) {
return $this->throwError('Failed to write to socket! (connection lost!)');
}
// Send the command.
if (@fwrite($this->_socket, $cmd . "\r\n") === false) {
return $this->throwError('Failed to write to socket!');
}
// Log sent message.
if ($this->_logger && $this->_logger->_isMasked(PEAR_LOG_DEBUG)) {
$this->_logger->debug('C: ' . $cmd);
}
return $this->_getStatusResponse();
}
/**
* Get servers status response after a command.
*
* @return mixed (int) response code on success
* (object) pear_error on failure
* @access private
*/
private function _getStatusResponse()
{
// Retrieve a line (terminated by "\r\n") from the server. RFC says max is 510, but IETF says "be liberal in what you accept"...
$response = @fgets($this->_socket, 4096);
if ($response === false) {
return $this->throwError('Failed to read from socket...!');
}
// Log incoming message.
if ($this->_logger && $this->_logger->_isMasked(PEAR_LOG_DEBUG)) {
$this->_logger->debug('S: ' . rtrim($response, "\r\n"));
}
// Trim the start of the response in case of misplaced whitespace (should not be needed).
$response = ltrim($response);
// Store the response in an array, 0 => response code, 1 => response message.
$this->_currentStatusResponse = array((int)substr($response, 0, 3), (string)rtrim(substr($response, 4)));
return $this->_currentStatusResponse[0];
}
/**
* Retrieve textural data
*
* Get data until a line with only a '.' in it is read and return data.
*
* @return mixed (array) text response on success
* (object) pear_error on failure
* @access protected
*/
protected function _getTextResponse()
{
// Buffer to hold the received lines.
$data = array();
$debug = ($this->_logger && $this->_logger->_isMasked(PEAR_LOG_DEBUG));
// Continue until connection is lost.
while (!feof($this->_socket)) {
// Retrieve and append up to 1024 characters from the server.
$line = @fgets($this->_socket, 1024);
if ($line === false) {
return $this->throwError('Failed to read line from socket.', null);
}
// Continue if the line is not terminated by CR LF.
if (substr($line, -2) !== "\r\n" || strlen($line) < 2) {
continue;
}
// Remove CR LF from the end of the line.
$line = substr($line, 0, -2);
// Check if the line terminates the text response.
if ($line === '.') {
if ($this->_logger) {
$this->_logger->debug('T: ' . $line);
}
// Return all previous lines.
return $data;
}
// If 1st char is '.' it's doubled (NNTP/RFC977 2.4.1).
if (substr($line, 0, 2) === '..') {
$line = substr($line, 1);
}
if ($debug) {
$this->_logger->debug('T: ' . $line);
}
// Add the line to the array of lines.
$data[] = $line;
}
if ($this->_logger) {
$this->_logger->warning('Broke out of reception loop! This souldn\'t happen unless connection has been lost?');
}
return $this->throwError('End of stream! Connection lost?', null);
}
/**
* Send an article to usenet.
*
* @note Data should be in the format specified by RFC850.
*
* @access private
*/
private function _sendArticle($article)
{
switch (true) {
case is_string($article):
@fwrite($this->_socket, $article);
@fwrite($this->_socket, "\r\n.\r\n");
if ($this->_logger && $this->_logger->_isMasked(PEAR_LOG_DEBUG)) {
foreach (explode("\r\n", $article) as $line) {
$this->_logger->debug('D: ' . $line);
}
$this->_logger->debug('D: .');
}
break;
case is_array($article):
//
$header = reset($article);
$body = next($article);
/* Experimental...
// If header is an array, implode it.
if (is_array($header)) {
$header = implode("\r\n", $header) . "\r\n";
}
*/
// Send header (including separation line)
@fwrite($this->_socket, $header);
@fwrite($this->_socket, "\r\n");
if ($this->_logger && $this->_logger->_isMasked(PEAR_LOG_DEBUG)) {
foreach (explode("\r\n", $header) as $line) {
$this->_logger->debug('D: ' . $line);
}
}
/* Experimental...
// If body is an array, implode it.
if (is_array($body)) {
$header = implode("\r\n", $body) . "\r\n";
}
*/
// Send body
@fwrite($this->_socket, $body);
@fwrite($this->_socket, "\r\n.\r\n");
if ($this->_logger && $this->_logger->_isMasked(PEAR_LOG_DEBUG)) {
foreach (explode("\r\n", $body) as $line) {
$this->_logger->debug('D: ' . $line);
}
$this->_logger->debug('D: .');
}
break;
default:
return $this->throwError('Ups...', null, null);
}
return true;
}
/**
* Return the last received response message.
*
* @return string The response message.
* @access private
*/
private function _currentStatusResponse()
{
return $this->_currentStatusResponse[1];
}
/* Session administration commands */
/**
* Connect to a NNTP server
*
* @param string $host (optional) The address of the NNTP-server to connect to, defaults to 'localhost'.
* @param mixed $encryption (optional) Use TLS/SSL on the connection?
* (string) 'tcp' => Use no encryption.
* 'ssl', 'sslv3', 'tls' => Use encryption.
* (null)|(false) Use no encryption.
* @param int $port (optional) The port number to connect to, defaults to 119.
* @param int $timeout (optional) How many seconds to wait before giving up when connecting.
* @param int $socketTimeout (optional) How many seconds to wait before timing out the (blocked) socket.
*
* @return mixed (bool) On success: True when posting allowed, otherwise false.
* (object) On failure: pear_error
* @access protected
*/
protected function connect($host = null, $encryption = null, $port = null, $timeout = 15, $socketTimeout = 120)
{
if ($this->_isConnected() ) {
return $this->throwError('Already connected, disconnect first!', null);
}
// v1.0.x API
if (is_int($encryption)) {
trigger_error('You are using deprecated API v1.0 in Net_NNTP_Protocol_Client: connect() !', E_USER_NOTICE);
$port = $encryption;
$encryption = false;
}
if (is_null($host)) {
$host = 'localhost';
}
// Choose transport based on encryption, and if no port is given, use default for that encryption.
switch ($encryption) {
case null:
case 'tcp':
case false:
$transport = 'tcp';
$port = is_null($port) ? 119 : $port;
break;
case 'sslv3':
case 'ssl':
case 'tls':
$transport = $encryption;
$port = is_null($port) ? 563 : $port;
break;
default:
$message = '$encryption parameter must be either tcp, tls, ssl or sslv3.';
trigger_error($message, E_USER_ERROR);
return $this->throwError($message);
}
// Attempt to connect to usenet.
$socket = @stream_socket_client(
$transport . '://' . $host . ':' . $port, $errorNumber, $errorString, $timeout
);
if ($socket === false) {
$message = "Connection to $transport://$host:$port failed.";
if (preg_match('/tls|ssl/', $transport)) {
$message .= ' Try disabling SSL/TLS, and/or try a different port.';
}
$message .= ' [ERROR ' . $errorNumber . ': ' . $errorString . ']';
if ($this->_logger) {
$this->_logger->notice($message);
}
return $this->throwError($message);
}
// Store the socket resource as property.
$this->_socket = $socket;
$this->_socketTimeout = (is_numeric($socketTimeout) ? $socketTimeout : $this->_socketTimeout);
// Set the socket timeout.
stream_set_timeout($this->_socket, $this->_socketTimeout);
if ($this->_logger) {
$this->_logger->info("Connection to $transport://$host:$port has been established.");
}
// Retrieve the server's initial response.
$response = $this->_getStatusResponse();
if ($this->isError($response)) {
return $response;
}
switch ($response) {
// 200, Posting allowed
case NET_NNTP_PROTOCOL_RESPONSECODE_READY_POSTING_ALLOWED:
// TODO: Set some variable before return
return true;
// 201, Posting NOT allowed
case NET_NNTP_PROTOCOL_RESPONSECODE_READY_POSTING_PROHIBITED:
if ($this->_logger) {
$this->_logger->info('Posting not allowed!');
}
// TODO: Set some variable before return
return false;
default:
return $this->_handleErrorResponse($response);
}
}
/**
* Returns servers capabilities
*
* @return mixed (array) list of capabilities on success or
* (object) pear_error on failure
* @access protected
*/
protected function cmdCapabilities()
{
$response = $this->_sendCommand('CAPABILITIES');
if ($this->isError($response)) {
return $response;
}
switch ($response) {
// 101, Draft: 'Capability list follows'
case NET_NNTP_PROTOCOL_RESPONSECODE_CAPABILITIES_FOLLOW:
$data = $this->_getTextResponse();
if ($this->isError($data)) {
return $data;
}
return $data;
default:
return $this->_handleErrorResponse($response);
}
}
/**
*
*
* @return mixed (bool) true when posting allowed, false when posting disallowed
* (object) pear_error on failure
* @access protected
*/
protected function cmdModeReader()
{
$response = $this->_sendCommand('MODE READER');
if ($this->isError($response)) {
return $response;
}
switch ($response) {
// 200, RFC2980: 'Hello, you can post'
case NET_NNTP_PROTOCOL_RESPONSECODE_READY_POSTING_ALLOWED:
// TODO: Set some variable before return
return true;
// 201, RFC2980: 'Hello, you can't post'
case NET_NNTP_PROTOCOL_RESPONSECODE_READY_POSTING_PROHIBITED:
if ($this->_logger) {
$this->_logger->info('Posting not allowed!');
}
// TODO: Set some variable before return
return false;
default:
return $this->_handleErrorResponse($response);
}
}
/**
* Alias for cmdQuit()
*
* @access protected
*/
protected function disconnect()
{
return $this->cmdQuit();
}
/**
* Disconnect from the NNTP server
*
* @return mixed (bool) true on success
* (object) pear_error on failure
* @access protected
*/
protected function cmdQuit()
{
$response = $this->_sendCommand('QUIT');
if ($this->isError($response)) {
return $response;
}
switch ($response) {
// RFC977: 'closing connection - goodbye!'
case NET_NNTP_PROTOCOL_RESPONSECODE_DISCONNECTING_REQUESTED:
// If socket is still open, close it.
$disconnected = true;
if ($this->_isConnected(false)) {
$disconnected = (bool)stream_socket_shutdown($this->_socket, STREAM_SHUT_RDWR);
}
if ($this->_logger) {
$this->_logger->info('Connection closed.');
}
$this->_currentStatusResponse = null;
$this->_socket = null;
return $disconnected;
default:
return $this->_handleErrorResponse($response);
}
}
/**
* Request TLS encryption to the news server.
*
* @return mixed (bool) on success
* (object) pear_error on failure
* @access protected
*/
protected function cmdStartTLS()
{
$response = $this->_sendCommand('STARTTLS');
if ($this->isError($response)) {
return $response;
}
switch ($response) {
// RFC4642: 'continue with TLS negotiation'
case NET_NNTP_PROTOCOL_RESPONSECODE_TLS_AUTHENTICATION_CONTINUE:
$encrypted = stream_socket_enable_crypto($this->_socket, true, STREAM_CRYPTO_METHOD_TLS_CLIENT);
switch (true) {
case $encrypted === true:
if ($this->_logger) {
$this->_logger->info('TLS encryption started.');
}
return true;
case $encrypted === false:
if ($this->_logger) {
$this->_logger->info('TLS encryption failed.');
}
return $this->throwError('Could not initiate TLS negotiation', $response, $this->_currentStatusResponse());
case is_int($encrypted):
return $this->throwError('TLS encryption failed.', $response, $this->_currentStatusResponse());
default:
return $this->throwError(
'Internal error - unknown response from stream_socket_enable_crypto()',
$response,
$this->_currentStatusResponse()
);
}
default:
return $this->_handleErrorResponse($response);
}
}
/* Group and article selection */
/**
* Selects a news group (issue a GROUP command to the server)
*
* @param string $newsgroup The newsgroup name
*
* @return mixed (array) group info on success
* (object) pear_error on failure
* @access protected
*/
protected function cmdGroup($newsgroup)
{
$response = $this->_sendCommand('GROUP '.$newsgroup);
if ($this->isError($response)) {
return $response;
}
switch ($response) {
// 211, RFC977: 'n f l s group selected'
case NET_NNTP_PROTOCOL_RESPONSECODE_GROUP_SELECTED:
$response_arr = explode(' ', trim($this->_currentStatusResponse()));
if ($this->_logger) {
$this->_logger->info('Group selected: ' . $response_arr[3]);
}
return array(
'group' => $response_arr[3],
'first' => $response_arr[1],
'last' => $response_arr[2],
'count' => $response_arr[0]
);
default:
return $this->_handleErrorResponse($response);
}
}
/**
* Gets a group overview.
*
* @param string $newsgroup (optional)
* @param mixed $range (optional)
*
* @return mixed (array) On success
* (object) pear_error On failure
* @access protected
*/
protected function cmdListgroup($newsgroup = null, $range = null)
{
if (is_null($newsgroup)) {
$command = 'LISTGROUP';
} else {
if (is_null($range)) {
$command = 'LISTGROUP ' . $newsgroup;
} else {
$command = 'LISTGROUP ' . $newsgroup . ' ' . $range;
}
}
$response = $this->_sendCommand($command);
if ($this->isError($response)){
return $response;
}
switch ($response) {
// 211, RFC2980: 'list of article numbers follow'
case NET_NNTP_PROTOCOL_RESPONSECODE_GROUP_SELECTED:
$articles = $this->_getTextResponse();
if ($this->isError($articles)) {
return $articles;
}
$response_arr = explode(' ', trim($this->_currentStatusResponse()), 4);
// If server does not return group summary in status response, return null array.
if (!is_numeric($response_arr[0]) ||
!is_numeric($response_arr[1]) ||
!is_numeric($response_arr[2]) ||
empty($response_arr[3])
) {
return array(
'group' => null,
'first' => null,
'last' => null,
'count' => null,
'articles' => $articles
);
}
return array(
'group' => $response_arr[3],
'first' => $response_arr[1],
'last' => $response_arr[2],
'count' => $response_arr[0],
'articles' => $articles
);
default:
return $this->_handleErrorResponse($response);
}
}
/**
* Select the previous article in current group.
*
* @return mixed (array) or (string) or (int) On success
* (object) pear_error On failure
* @access protected
*/
protected function cmdLast()
{
$response = $this->_sendCommand('LAST');
if ($this->isError($response)) {
return $response;
}
switch ($response) {
// 223, RFC977: 'n a article retrieved - request text separately (n = article number, a = unique article id)'
case NET_NNTP_PROTOCOL_RESPONSECODE_ARTICLE_SELECTED:
$response_arr = explode(' ', trim($this->_currentStatusResponse()));
if ($this->_logger) {
$this->_logger->info('Selected previous article: ' . $response_arr[0] . ' - ' . $response_arr[1]);
}
return array($response_arr[0], (string) $response_arr[1]);
default:
return $this->_handleErrorResponse($response);
}
}
/**
* Select the next article in current group.
*
* @return mixed (array) or (string) or (int) On success
* (object) pear_error On failure
* @access protected
*/
protected function cmdNext()
{
$response = $this->_sendCommand('NEXT');
if ($this->isError($response)) {
return $response;
}
switch ($response) {
// 223, RFC977: 'n a article retrieved - request text separately (n = article number, a = unique article id)'
case NET_NNTP_PROTOCOL_RESPONSECODE_ARTICLE_SELECTED:
$response_arr = explode(' ',
trim($this->_currentStatusResponse()));
if ($this->_logger) {
$this->_logger->info('Selected previous article: ' . $response_arr[0] . ' - ' . $response_arr[1]);
}
return array($response_arr[0], (string) $response_arr[1]);
default:
return $this->_handleErrorResponse($response);
}
}
/* Retrieval of articles and article sections */
/**
* Get an article from the currently open connection.
*
* @param mixed $article Either a message-id or a message-number of the article to fetch.
* If null or '', then use current article.
*
* @return mixed (array) article on success
* (object) pear_error on failure
* @access protected
*/
protected function cmdArticle($article = null)
{
if (is_null($article)) {
$command = 'ARTICLE';
} else {
$command = 'ARTICLE ' . $article;
}
$response = $this->_sendCommand($command);
if ($this->isError($response)) {
return $response;
}
switch ($response) {
// 220, RFC977: 'n <a> article retrieved - head and body follow (n = article number, <a> = message-id)'
case NET_NNTP_PROTOCOL_RESPONSECODE_ARTICLE_FOLLOWS:
$data = $this->_getTextResponse();
if ($this->isError($data)) {
return $data;
}
if ($this->_logger) {
$this->_logger->info(($article == null ? 'Fetched current article' : 'Fetched article: ' . $article));
}
return $data;
default:
return $this->_handleErrorResponse($response);
}
}
/**
* Get the headers of an article from the currently open connection.
*
* @param mixed $article Either a message-id or a message-number of the article to fetch the headers from.
* If null or '', then use current article.
*
* @return mixed (array) headers on success or
* (object) pear_error on failure
* @access protected
*/
protected function cmdHead($article = null)
{
if (is_null($article)) {
$command = 'HEAD';
} else {
$command = 'HEAD ' . $article;
}
$response = $this->_sendCommand($command);
if ($this->isError($response)) {
return $response;
}
switch ($response) {
// 221, RFC977: 'n <a> article retrieved - head follows'
case NET_NNTP_PROTOCOL_RESPONSECODE_HEAD_FOLLOWS:
$data = $this->_getTextResponse();
if ($this->isError($data)) {
return $data;
}
if ($this->_logger) {
$this->_logger->info(($article == null ? 'Fetched current article header' : 'Fetched article header for article: ' . $article));
}
return $data;
default:
return $this->_handleErrorResponse($response);
}
}
/**
* Get the body of an article from the currently open connection.
*
* @param mixed $article Either a message-id or a message-number of the article to fetch the body from.
* If null or '', then use current article.
*
* @return mixed (array) body on success
* (object) pear_error on failure
* @access protected
*/
protected function cmdBody($article = null)
{
if (is_null($article)) {
$command = 'BODY';
} else {
$command = 'BODY ' . $article;
}
$response = $this->_sendCommand($command);
if ($this->isError($response)) {
return $response;
}
switch ($response) {
// 222, RFC977: 'n <a> article retrieved - body follows'
case NET_NNTP_PROTOCOL_RESPONSECODE_BODY_FOLLOWS:
$data = $this->_getTextResponse();
if ($this->isError($data)) {
return $data;
}
if ($this->_logger) {
$this->_logger->info(($article == null ? 'Fetched current article body' : 'Fetched article body for article: ' . $article));
}
return $data;
default:
return $this->_handleErrorResponse($response);
}
}
/**
* Selects an article by article message-number.
*
* @param mixed $article
*
* @return mixed (array) or (string) or (int) on success
* (object) pear_error on failure
* @access protected
*/
protected function cmdStat($article = null)
{
if (is_null($article)) {
$command = 'STAT';
} else {
$command = 'STAT ' . $article;
}
$response = $this->_sendCommand($command);
if ($this->isError($response)) {
return $response;
}
switch ($response) {
/* 223, RFC977: 'n <a> article retrieved - request text
* separately' (actually not documented, but copied
* from the ARTICLE command)
*/
case NET_NNTP_PROTOCOL_RESPONSECODE_ARTICLE_SELECTED:
$response_arr = explode(' ',
trim($this->_currentStatusResponse()));
if ($this->_logger) {
$this->_logger->info('Selected article: ' . $response_arr[0] . ' - ' . $response_arr[1]);
}
return array($response_arr[0], (string) $response_arr[1]);
default:
return $this->_handleErrorResponse($response);
}
}
/* Article posting */
/**
* Post an article to a newsgroup.
*
* @return mixed (bool) true on success
* (object) pear_error on failure
* @access public
*/
public function cmdPost()
{
$response = $this->_sendCommand('POST');
if ($this->isError($response)) {
return $response;
}
switch ($response) {
// 340, RFC977: 'send article to be posted. End with <CR-LF>.<CR-LF>'
case NET_NNTP_PROTOCOL_RESPONSECODE_POSTING_SEND:
return true;
default:
return $this->_handleErrorResponse($response);
}
}
/**
* Post an article to a newsgroup.
*
* @note Should be presented in the format specified by RFC850.
*
* @param mixed $article (string/array)
*
* @return mixed (bool) true on success
* (object) pear_error on failure
* @access public
*/
public function cmdPost2($article)
{
$this->_sendArticle($article);
// Retrieve server's response.
$response = $this->_getStatusResponse();
if ($this->isError($response)) {
return $response;
}
switch ($response) {
// 240, RFC977: 'article posted ok'
case NET_NNTP_PROTOCOL_RESPONSECODE_POSTING_SUCCESS:
return true;
default:
return $this->_handleErrorResponse($response);
}
}
/**
* Tell the news server we want to upload an article, the server will check if it has the message-id first.
*
* @param string $id Message-ID.
*
* @return mixed (bool) true on success
* (object) pear_error on failure
* @access protected
*/
protected function cmdIhave($id)
{
$response = $this->_sendCommand('IHAVE ' . $id);
if ($this->isError($response)) {
return $response;
}
switch ($response) {
// 335, RFC997: 'Send article to be transferred'
case NET_NNTP_PROTOCOL_RESPONSECODE_TRANSFER_SEND:
return true;
default:
return $this->_handleErrorResponse($response);
}
}
/**
* Tell the news server we have an article to upload, the server will check if it has it first.
*
* @note Should be presented in the format specified by RFC850.
*
* @param mixed $article (string/array)
*
* @return mixed (bool) true on success
* (object) pear_error on failure
* @access protected
*/
protected function cmdIhave2($article)
{
$this->_sendArticle($article);
// Retrieve server's response.
$response = $this->_getStatusResponse();
if ($this->isError($response)) {
return $response;
}
switch ($response) {
// 235, RFC977: 'Article transferred OK'
case NET_NNTP_PROTOCOL_RESPONSECODE_TRANSFER_SUCCESS:
return true;
default:
return $this->_handleErrorResponse($response);
}
}
/* Information commands */
/**
* Get the date from the news server.
*
* @return mixed (string) or (int) 'YYYYMMDDhhmmss', timestamp on success
* (object) pear_error on failure
* @access protected
*/
protected function cmdDate()
{
$response = $this->_sendCommand('DATE');
if ($this->isError($response)){
return $response;
}
switch ($response) {
// 111, RFC2980: '(string of numbers representing the date and time)'
case NET_NNTP_PROTOCOL_RESPONSECODE_SERVER_DATE:
return $this->_currentStatusResponse();
default:
return $this->_handleErrorResponse($response);
}
}
/**
* Returns the server's help text.
*
* @return mixed (array) help text on success or
* (object) pear_error on failure
* @access protected
*/
protected function cmdHelp()
{
$response = $this->_sendCommand('HELP');
if ($this->isError($response)) {
return $response;
}
switch ($response) {
// 100, RFC977: 'Help text follows'
case NET_NNTP_PROTOCOL_RESPONSECODE_HELP_FOLLOWS:
$data = $this->_getTextResponse();
if ($this->isError($data)) {
return $data;
}
return $data;
default:
return $this->_handleErrorResponse($response);
}
}
/**
* Fetches a list of all newsgroups created since a specified date.
*
* @param int $time Last time you checked for groups (timestamp).
* @param string $distributions (optional) (deprecaded in rfc draft)
*
* @return mixed (array) nested array with informations about existing newsgroups on success
* (object) pear_error on failure
* @access protected
*/
protected function cmdNewgroups($time, $distributions = null)
{
$date = gmdate('ymd His', $time);
if (is_null($distributions)) {
$command = 'NEWGROUPS ' . $date . ' GMT';
} else {
$command = 'NEWGROUPS ' . $date . ' GMT <' . $distributions . '>';
}
$response = $this->_sendCommand($command);
if ($this->isError($response)){
return $response;
}
switch ($response) {
// 231, REF977: 'list of new newsgroups follows'
case NET_NNTP_PROTOCOL_RESPONSECODE_NEW_GROUPS_FOLLOW:
$data = $this->_getTextResponse();
if ($this->isError($data)) {
return $data;
}
$groups = array();
foreach($data as $line) {
$arr = explode(' ', trim($line));
$group = array(
'group' => $arr[0],
'last' => $arr[1],
'first' => $arr[2],
'posting' => $arr[3]
);
$groups[$group['group']] = $group;
}
return $groups;
default:
return $this->_handleErrorResponse($response);
}
}
/**
*
*
* @param int $time Unix timestamp.
* @param mixed $newsgroups (string or array of strings)
* @param mixed $distribution (string or array of strings)
*
* @return mixed
* @access protected
*/
protected function cmdNewnews($time, $newsgroups, $distribution = null)
{
$date = gmdate('ymd His', $time);
if (is_array($newsgroups)) {
$newsgroups = implode(',', $newsgroups);
}
if (is_null($distribution)) {
$command = 'NEWNEWS ' . $newsgroups . ' ' . $date . ' GMT';
} else {
if (is_array($distribution)) {
$distribution = implode(',', $distribution);
}
$command = 'NEWNEWS ' . $newsgroups . ' ' . $date . ' GMT <' . $distribution . '>';
}
// TODO: the length of the request string may not exceed 510 chars.
$response = $this->_sendCommand($command);
if ($this->isError($response)){
return $response;
}
switch ($response) {
// 230, RFC977: 'list of new articles by message-id follows'
case NET_NNTP_PROTOCOL_RESPONSECODE_NEW_ARTICLES_FOLLOW:
$messages = array();
foreach($this->_getTextResponse() as $line) {
$messages[] = $line;
}
return $messages;
default:
return $this->_handleErrorResponse($response);
}
}
/* The LIST commands */
/**
* Fetches a list of all available newsgroups.
*
* @return mixed (array) nested array with informations about existing newsgroups on success
* (object) pear_error on failure
* @access protected
*/
protected function cmdList()
{
$response = $this->_sendCommand('LIST');
if ($this->isError($response)){
return $response;
}
switch ($response) {
// 215, RFC977: 'list of newsgroups follows'
case NET_NNTP_PROTOCOL_RESPONSECODE_GROUPS_FOLLOW:
$data = $this->_getTextResponse();
if ($this->isError($data)) {
return $data;
}
$groups = array();
foreach($data as $line) {
$arr = explode(' ', trim($line));
$group = array(
'group' => $arr[0],
'last' => $arr[1],
'first' => $arr[2],
'posting' => $arr[3]
);
$groups[$group['group']] = $group;
}
return $groups;
default:
return $this->_handleErrorResponse($response);
}
}
/**
* Fetches a list of all available newsgroups.
*
* @param string $wildMat
*
* @return mixed (array) nested array with informations about existing newsgroups on success
* (object) pear_error on failure
* @access protected
*/
protected function cmdListActive($wildMat = null)
{
if (is_null($wildMat)) {
$command = 'LIST ACTIVE';
} else {
$command = 'LIST ACTIVE ' . $wildMat;
}
$response = $this->_sendCommand($command);
if ($this->isError($response)){
return $response;
}
switch ($response) {
// 215, RFC977: 'list of newsgroups follows'
case NET_NNTP_PROTOCOL_RESPONSECODE_GROUPS_FOLLOW:
$data = $this->_getTextResponse();
if ($this->isError($data)) {
return $data;
}
$groups = array();
foreach($data as $line) {
$arr = explode(' ', trim($line));
$group = array(
'group' => $arr[0],
'last' => $arr[1],
'first' => $arr[2],
'posting' => $arr[3]
);
$groups[$group['group']] = $group;
}
if ($this->_logger) {
$this->_logger->info('Fetched list of available groups');
}
return $groups;
default:
return $this->_handleErrorResponse($response);
}
}
/**
* Fetches a list of (all) avaible newsgroup descriptions.
*
* @param string $wildMat Wildmat of the groups, that is to be listed, defaults to null;
*
* @return mixed (array) nested array with description of existing newsgroups on success
* (object) pear_error on failure
* @access protected
*/
protected function cmdListNewsgroups($wildMat = null)
{
if (is_null($wildMat)) {
$command = 'LIST NEWSGROUPS';
} else {
$command = 'LIST NEWSGROUPS ' . $wildMat;
}
$response = $this->_sendCommand($command);
if ($this->isError($response)){
return $response;
}
switch ($response) {
// 215, RFC2980: 'information follows'
case NET_NNTP_PROTOCOL_RESPONSECODE_GROUPS_FOLLOW:
$data = $this->_getTextResponse();
if ($this->isError($data)) {
return $data;
}
$groups = array();
foreach($data as $line) {
if (preg_match('/^(\S+)\s+(.*)$/', ltrim($line), $matches)) {
$groups[$matches[1]] = (string) $matches[2];
} else if ($this->_logger) {
$this->_logger->warning("Recieved non-standard line: '$line'");
}
}
if ($this->_logger) {
$this->_logger->info('Fetched group descriptions');
}
return $groups;
default:
return $this->_handleErrorResponse($response);
}
}
/* Article field access commands */
/**
* Fetch message header from message number $first until $last
*
* @info The format of the returned array is: $messages[][header_name]
*
* @param string $range (optional) articles to fetch
*
* @return mixed (array) nested array of message and there headers on success
* (object) pear_error on failure
* @access protected
*/
protected function cmdOver($range = null)
{
if (is_null($range)) {
$command = 'OVER';
} else {
$command = 'OVER ' . $range;
}
$response = $this->_sendCommand($command);
if ($this->isError($response)){
return $response;
}
switch ($response) {
// 224, RFC2980: 'Overview information follows'
case NET_NNTP_PROTOCOL_RESPONSECODE_OVERVIEW_FOLLOWS:
$data = $this->_getTextResponse();
if ($this->isError($data)) {
return $data;
}
foreach ($data as $key => $value) {
$data[$key] = explode("\t", trim($value));
}
if ($this->_logger) {
$this->_logger->info('Fetched overview ' . ($range == null ? 'for current article' : 'for range: ' . $range));
}
return $data;
default:
return $this->_handleErrorResponse($response);
}
}
/**
* Fetch message header from message number $first until $last
*
* @info The format of the returned array is: $messages[message_id][header_name]
*
* @param string $range (optional) articles to fetch
*
* @return mixed (array) nested array of message and there headers on success
* (object) pear_error on failure
* @access protected
*/
protected function cmdXOver($range = null)
{
// Deprecated API (the code _is_ still in alpha state).
if (func_num_args() > 1) {
exit('The second parameter in cmdXOver() has been deprecated! Use x-y instead...');
}
if (is_null($range)) {
$command = 'XOVER';
} else {
$command = 'XOVER ' . $range;
}
$response = $this->_sendCommand($command);
if ($this->isError($response)){
return $response;
}
switch ($response) {
// 224, RFC2980: 'Overview information follows'
case NET_NNTP_PROTOCOL_RESPONSECODE_OVERVIEW_FOLLOWS:
$data = $this->_getTextResponse();
if ($this->isError($data)) {
return $data;
}
foreach ($data as $key => $value) {
$data[$key] = explode("\t", trim($value));
}
if ($this->_logger) {
$this->_logger->info('Fetched overview ' . ($range == null ? 'for current article' : 'for range: ' . $range));
}
return $data;
default:
return $this->_handleErrorResponse($response);
}
}
/**
* Returns a list of available headers which are sent from tge news server to the client for every news message.
*
* @return mixed (array) of header names on success or
* (object) pear_error on failure
* @access protected
*/
protected function cmdListOverviewFmt()
{
$response = $this->_sendCommand('LIST OVERVIEW.FMT');
if ($this->isError($response)){
return $response;
}
switch ($response) {
// 215, RFC2980: 'information follows'
case NET_NNTP_PROTOCOL_RESPONSECODE_GROUPS_FOLLOW:
$data = $this->_getTextResponse();
if ($this->isError($data)) {
return $data;
}
$format = array();
foreach ($data as $line) {
// Check if post fixed by ':full' (case-insensitive)
if (0 == strcasecmp(substr($line, -5, 5), ':full')) {
// ':full' is _not_ included in tag, but value set to true
$format[substr($line, 0, -5)] = true;
} else {
// ':' is _not_ included in tag; value set to false
$format[substr($line, 0, -1)] = false;
}
}
if ($this->_logger) {
$this->_logger->info('Fetched overview format');
}
return $format;
default:
return $this->_handleErrorResponse($response);
}
}
/**
*
*
* The format of the returned array is:
* $messages[message_id]
*
* @param string $field (optional)
* @param string $range (optional) articles to fetch
*
* @return mixed (array) nested array of message and there header on success
* (object) pear_error on failure
* @access protected
*/
protected function cmdXHdr($field, $range = null)
{
if (is_null($range)) {
$command = 'XHDR ' . $field;
} else {
$command = 'XHDR ' . $field . ' ' . $range;
}
$response = $this->_sendCommand($command);
if ($this->isError($response)){
return $response;
}
switch ($response) {
// 221, RFC2980: 'Header follows'
case NET_NNTP_PROTOCOL_RESPONSECODE_HEAD_FOLLOWS:
$data = $this->_getTextResponse();
if ($this->isError($data)) {
return $data;
}
$return = array();
foreach($data as $line) {
$line = explode(' ', trim($line), 2);
$return[$line[0]] = $line[1];
}
return $return;
default:
return $this->_handleErrorResponse($response);
}
}
/**
* Fetches a list of (all) available newsgroup descriptions.
* Deprecated as of RFC2980.
*
* @param string $wildMat Wildmat of the groups, that is to be listed, defaults to '*';
*
* @return mixed (array) nested array with description of existing newsgroups on success
* (object) pear_error on failure
* @access protected
*/
protected function cmdXGTitle($wildMat = '*')
{
$response = $this->_sendCommand('XGTITLE ' . $wildMat);
if ($this->isError($response)){
return $response;
}
switch ($response) {
// RFC2980: 'list of groups and descriptions follows'
case NET_NNTP_PROTOCOL_RESPONSECODE_XGTITLE_GROUPS_FOLLOW:
$data = $this->_getTextResponse();
if ($this->isError($data)) {
return $data;
}
$groups = array();
foreach($data as $line) {
preg_match('/^(.*?)\s(.*?$)/', trim($line), $matches);
$groups[$matches[1]] = (string) $matches[2];
}
return $groups;
default:
return $this->_handleErrorResponse($response);
}
}
/**
* Fetch message references from message number $first to $last
*
* @param string $range (optional) articles to fetch
*
* @return mixed (array) assoc. array of message references on success
* (object) pear_error on failure
* @access protected
*/
protected function cmdXROver($range = null)
{
// Warn about deprecated API (the code _is_ still in alpha state)
if (func_num_args() > 1 ) {
exit('The second parameter in cmdXROver() has been deprecated! Use x-y instead...');
}
if (is_null($range)) {
$command = 'XROVER';
} else {
$command = 'XROVER ' . $range;
}
$response = $this->_sendCommand($command);
if ($this->isError($response)){
return $response;
}
switch ($response) {
// 224, RFC2980: 'Overview information follows'
case NET_NNTP_PROTOCOL_RESPONSECODE_OVERVIEW_FOLLOWS:
$data = $this->_getTextResponse();
if ($this->isError($data)) {
return $data;
}
$return = array();
foreach($data as $line) {
$line = explode(' ', trim($line), 2);
$return[$line[0]] = $line[1];
}
return $return;
default:
return $this->_handleErrorResponse($response);
}
}
/**
*
*
* @param string $field
* @param string $range
* @param mixed $wildMat
*
* @return mixed (array) nested array of message and there headers on success
* (object) pear_error on failure
* @access protected
*/
protected function cmdXPat($field, $range, $wildMat)
{
if (is_array($wildMat)) {
$wildMat = implode(' ', $wildMat);
}
$response = $this->_sendCommand('XPAT ' . $field . ' ' . $range . ' ' . $wildMat);
if ($this->isError($response)){
return $response;
}
switch ($response) {
case 221: // 221, RFC2980: 'Header follows'
$data = $this->_getTextResponse();
if ($this->isError($data)) {
return $data;
}
$return = array();
foreach($data as $line) {
$line = explode(' ', trim($line), 2);
$return[$line[0]] = $line[1];
}
return $return;
default:
return $this->_handleErrorResponse($response);
}
}
/**
* Authenticate using 'original' method
*
* @param string $user The username to authenticate as.
* @param string $pass The password to authenticate with.
*
* @return mixed (bool) true on success or
* (object) pear_error on failure
*
* @access protected
*/
protected function cmdAuthinfo($user, $pass)
{
// Send the username
$response = $this->_sendCommand('AUTHINFO user '.$user);
if ($this->isError($response)) {
return $response;
}
// Send the password, if the server asks
if (($response == 381) && ($pass !== null)) {
// Send the password
$response = $this->_sendCommand('AUTHINFO pass '.$pass);
if ($this->isError($response)) {
return $response;
}
}
switch ($response) {
case 281: // RFC2980: 'Authentication accepted'
if ($this->_logger) {
$this->_logger->info("Authenticated (as user '$user')");
}
// TODO: Set some variable before return
return true;
default:
return $this->_handleErrorResponse($response);
}
}
/**
* Authenticate using 'simple' method
*
* @param string $user The username to authenticate as.
* @param string $pass The password to authenticate with.
*
* @return mixed (bool) true on success or (object) pear_error on failure
* @access protected
*/
protected function cmdAuthinfoSimple($user, $pass)
{
return $this->throwError("The auth mode: 'simple' is has not been implemented yet", null);
}
/**
* Authenticate using 'generic' method
*
* @param string $user The username to authenticate as.
* @param string $pass The password to authenticate with.
*
* @return mixed (bool) true on success
* (object) pear_error on failure
* @access protected
*/
protected function cmdAuthinfoGeneric($user, $pass)
{
return $this->throwError("The auth mode: 'generic' is has not been implemented yet", null);
}
/**
* Test whether we are connected or not.
*
* @param bool $feof Check for the end of file pointer.
*
* @return bool true or false
* @access protected
*/
protected function _isConnected($feof = true)
{
return (is_resource($this->_socket) && ($feof ? !feof($this->_socket) : true));
}
/**
* Verify NNTP error code and return PEAR error.
*
* @param int $response NET_NNTP Response code
*
* @return object PEAR error
* @access protected
*/
protected function _handleErrorResponse(&$response)
{
switch ($response) {
// 381, RFC2980: 'More authentication information required'
case NET_NNTP_PROTOCOL_RESPONSECODE_AUTHENTICATION_CONTINUE:
return $this->throwError('More authentication information required', $response, $this->_currentStatusResponse());
// 400, RFC977: 'Service discontinued'
case NET_NNTP_PROTOCOL_RESPONSECODE_DISCONNECTING_FORCED:
return $this->throwError('Server refused connection', $response, $this->_currentStatusResponse());
// 411, RFC977: 'no such news group'
case NET_NNTP_PROTOCOL_RESPONSECODE_NO_SUCH_GROUP:
return $this->throwError('No such news group on server', $response, $this->_currentStatusResponse());
// 412, RFC2980: 'No news group current selected'
case NET_NNTP_PROTOCOL_RESPONSECODE_NO_GROUP_SELECTED:
return $this->throwError('No news group current selected', $response, $this->_currentStatusResponse());
// 420, RFC2980: 'Current article number is invalid'
case NET_NNTP_PROTOCOL_RESPONSECODE_NO_ARTICLE_SELECTED:
return $this->throwError('Current article number is invalid', $response, $this->_currentStatusResponse());
// 421, RFC977: 'no next article in this group'
case NET_NNTP_PROTOCOL_RESPONSECODE_NO_NEXT_ARTICLE:
return $this->throwError('No next article in this group', $response, $this->_currentStatusResponse());
// 422, RFC977: 'no previous article in this group'
case NET_NNTP_PROTOCOL_RESPONSECODE_NO_PREVIOUS_ARTICLE:
return $this->throwError('No previous article in this group', $response, $this->_currentStatusResponse());
// 423, RFC977: 'No such article number in this group'
case NET_NNTP_PROTOCOL_RESPONSECODE_NO_SUCH_ARTICLE_NUMBER:
return $this->throwError('No such article number in this group', $response, $this->_currentStatusResponse());
// 430, RFC977: 'No such article found'
case NET_NNTP_PROTOCOL_RESPONSECODE_NO_SUCH_ARTICLE_ID:
return $this->throwError('No such article found', $response, $this->_currentStatusResponse());
// 435, RFC977: 'Article not wanted'
case NET_NNTP_PROTOCOL_RESPONSECODE_TRANSFER_UNWANTED:
return $this->throwError('Article not wanted', $response, $this->_currentStatusResponse());
// 436, RFC977: 'Transfer failed - try again later'
case NET_NNTP_PROTOCOL_RESPONSECODE_TRANSFER_FAILURE:
return $this->throwError('Transfer failed - try again later', $response, $this->_currentStatusResponse());
// 437, RFC977: 'Article rejected - do not try again'
case NET_NNTP_PROTOCOL_RESPONSECODE_TRANSFER_REJECTED:
return $this->throwError('Article rejected - do not try again', $response, $this->_currentStatusResponse());
// 440, RFC977: 'posting not allowed'
case NET_NNTP_PROTOCOL_RESPONSECODE_POSTING_PROHIBITED:
return $this->throwError('Posting not allowed', $response, $this->_currentStatusResponse());
// 441, RFC977: 'posting failed'
case NET_NNTP_PROTOCOL_RESPONSECODE_POSTING_FAILURE:
return $this->throwError('Posting failed', $response, $this->_currentStatusResponse());
// 481, RFC2980: 'Groups and descriptions unavailable'
case NET_NNTP_PROTOCOL_RESPONSECODE_XGTITLE_GROUPS_UNAVAILABLE:
return $this->throwError('Groups and descriptions unavailable', $response, $this->_currentStatusResponse());
// 482, RFC2980: 'Authentication rejected'
case NET_NNTP_PROTOCOL_RESPONSECODE_AUTHENTICATION_REJECTED:
return $this->throwError('Authentication rejected', $response, $this->_currentStatusResponse());
// 500, RFC977: 'Command not recognized'
case NET_NNTP_PROTOCOL_RESPONSECODE_UNKNOWN_COMMAND:
return $this->throwError('Command not recognized', $response, $this->_currentStatusResponse());
// 501, RFC977: 'Command syntax error'
case NET_NNTP_PROTOCOL_RESPONSECODE_SYNTAX_ERROR:
return $this->throwError('Command syntax error', $response, $this->_currentStatusResponse());
// 502, RFC2980: 'No permission'
case NET_NNTP_PROTOCOL_RESPONSECODE_NOT_PERMITTED:
return $this->throwError('No permission', $response, $this->_currentStatusResponse());
// 503, RFC2980: 'Program fault - command not performed'
case NET_NNTP_PROTOCOL_RESPONSECODE_NOT_SUPPORTED:
return $this->throwError('Internal server error, function not performed', $response, $this->_currentStatusResponse());
// RFC4642: 'Can not initiate TLS negotiation'
case NET_NNTP_PROTOCOL_RESPONSECODE_TLS_FAILED_NEGOTIATION:
return $this->throwError('Can not initiate TLS negotiation', $response, $this->_currentStatusResponse());
default:
$text = $this->_currentStatusResponse();
return $this->throwError("Unexpected response: '$text'", $response, $text);
}
}
}
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