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<?php
// +-----------------------------------------------------------------------+
// | Copyright (c) 2002, Richard Heyes |
// | All rights reserved. |
// | |
// | Redistribution and use in source and binary forms, with or without |
// | modification, are permitted provided that the following conditions |
// | are met: |
// | |
// | o Redistributions of source code must retain the above copyright |
// | notice, this list of conditions and the following disclaimer. |
// | o Redistributions in binary form must reproduce the above copyright |
// | notice, this list of conditions and the following disclaimer in the |
// | documentation and/or other materials provided with the distribution.|
// | o The names of the authors may not be used to endorse or promote |
// | products derived from this software without specific prior written |
// | permission. |
// | |
// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
// | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
// | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
// | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
// | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
// | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
// | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
// | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
// | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
// | |
// +-----------------------------------------------------------------------+
// | Author: Richard Heyes <richard@phpguru.org> |
// | Co-Author: Damian Fernandez Sosa <damlists@cnba.uba.ar> |
// +-----------------------------------------------------------------------+
//
// $Id: POP3.php 295243 2010-02-18 22:05:20Z clockwerx $
require_once 'Net/Socket.php';
/**
* +----------------------------- IMPORTANT ------------------------------+
* | Usage of this class compared to native php extensions such as IMAP |
* | is slow and may be feature deficient. If available you are STRONGLY |
* | recommended to use the php extensions. |
* +----------------------------------------------------------------------+
*
* POP3 Access Class
*
* For usage see the example script
*/
define('NET_POP3_STATE_DISCONNECTED', 1, true);
define('NET_POP3_STATE_AUTHORISATION', 2, true);
define('NET_POP3_STATE_TRANSACTION', 4, true);
class Net_POP3
{
/**
* Some basic information about the mail drop
* garnered from the STAT command
*
* @var array
*/
var $_maildrop;
/**
* Used for APOP to store the timestamp
*
* @var string
*/
var $_timestamp;
/**
* Timeout that is passed to the socket object
*
* @var integer
*/
var $_timeout;
/**
* Socket object
*
* @var object
*/
var $_socket;
/**
* Current state of the connection. Used with the
* constants defined above.
*
* @var integer
*/
var $_state;
/**
* Hostname to connect to
*
* @var string
*/
var $_host;
/**
* Port to connect to
*
* @var integer
*/
var $_port;
/**
* To allow class debuging
* @var boolean
*/
var $_debug = false;
/**
* The auth methods this class support
* @var array
*/
//var $supportedAuthMethods=array('DIGEST-MD5', 'CRAM-MD5', 'APOP' , 'PLAIN' , 'LOGIN', 'USER');
//Disabling DIGEST-MD5 for now
var $supportedAuthMethods=array( 'CRAM-MD5', 'APOP' , 'PLAIN' , 'LOGIN', 'USER');
//var $supportedAuthMethods=array( 'CRAM-MD5', 'PLAIN' , 'LOGIN');
//var $supportedAuthMethods=array( 'PLAIN' , 'LOGIN');
/**
* The auth methods this class support
* @var array
*/
var $supportedSASLAuthMethods=array('DIGEST-MD5', 'CRAM-MD5');
/**
* The capability response
* @var array
*/
var $_capability;
/**
* Constructor. Sets up the object variables, and instantiates
* the socket object.
*
*/
function Net_POP3()
{
$this->_timestamp = ''; // Used for APOP
$this->_maildrop = array();
$this->_timeout = 3;
$this->_state = NET_POP3_STATE_DISCONNECTED;
$this->_socket = new Net_Socket();
/*
* Include the Auth_SASL package. If the package is not available,
* we disable the authentication methods that depend upon it.
*/
@include_once 'Auth/SASL.php';
if (!class_exists('Auth_SASL')) {
if ($this->_debug){
echo "AUTH_SASL NOT PRESENT!\n";
}
foreach ($this->supportedSASLAuthMethods as $SASLMethod) {
$pos = array_search($SASLMethod, $this->supportedAuthMethods);
if ($this->_debug) {
echo "DISABLING METHOD $SASLMethod\n";
}
unset($this->supportedAuthMethods[$pos]);
}
}
}
/**
* Handles the errors the class can find
* on the server
*
* @access private
* @return PEAR_Error
*/
function _raiseError($msg, $code =-1)
{
include_once 'PEAR.php';
return PEAR::raiseError($msg, $code);
}
/**
* Connects to the given host on the given port.
* Also looks for the timestamp in the greeting
* needed for APOP authentication
*
* @param string $host Hostname/IP address to connect to
* @param string $port Port to use to connect to on host
* @return bool Success/Failure
*/
function connect($host = 'localhost', $port = 110)
{
$this->_host = $host;
$this->_port = $port;
$result = $this->_socket->connect($host, $port, false, $this->_timeout);
if ($result === true) {
$data = $this->_recvLn();
if( $this->_checkResponse($data) ){
// if the response begins with '+OK' ...
// if (@substr(strtoupper($data), 0, 3) == '+OK') {
// Check for string matching apop timestamp
if (preg_match('/<.+@.+>/U', $data, $matches)) {
$this->_timestamp = $matches[0];
}
$this->_maildrop = array();
$this->_state = NET_POP3_STATE_AUTHORISATION;
return true;
}
}
$this->_socket->disconnect();
return false;
}
/**
* Disconnect function. Sends the QUIT command
* and closes the socket.
*
* @return bool Success/Failure
*/
function disconnect()
{
return $this->_cmdQuit();
}
/**
* Performs the login procedure. If there is a timestamp
* stored, APOP will be tried first, then basic USER/PASS.
*
* @param string $user Username to use
* @param string $pass Password to use
* @param mixed $apop Whether to try APOP first, if used as string you can select the auth methd to use ( $pop3->login('validlogin', 'validpass', "CRAM-MD5");
* Valid methods are: 'DIGEST-MD5','CRAM-MD5','LOGIN','PLAIN','APOP','USER'
* @return mixed true on Success/ PEAR_ERROR on error
*/
function login($user, $pass, $apop = true)
{
if ($this->_state == NET_POP3_STATE_AUTHORISATION) {
if (PEAR::isError($ret= $this->_cmdAuthenticate($user, $pass, $apop))){
return $ret;
}
if (!PEAR::isError($ret)) {
$this->_state = NET_POP3_STATE_TRANSACTION;
return true;
}
}
return $this->_raiseError('Generic login error' , 1);
}
/**
* Parses the response from the capability command. Stores
* the result in $this->_capability
*
* @access private
*/
function _parseCapability()
{
if(!PEAR::isError($data = $this->_sendCmd('CAPA'))){
$data = $this->_getMultiline();
}else {
// CAPA command not supported, reset data var
// to avoid Notice errors of preg_split on an object
$data = '';
}
$data = preg_split('/\r?\n/', $data, -1, PREG_SPLIT_NO_EMPTY);
for ($i = 0; $i < count($data); $i++) {
$capa='';
if (preg_match('/^([a-z,\-]+)( ((.*))|$)$/i', $data[$i], $matches)) {
$capa=strtolower($matches[1]);
switch ($capa) {
case 'implementation':
$this->_capability['implementation'] = $matches[3];
break;
case 'sasl':
$this->_capability['sasl'] = preg_split('/\s+/', $matches[3]);
break;
default :
$this->_capability[$capa] = $matches[2];
break;
}
}
}
}
/**
* Returns the name of the best authentication method that the server
* has advertised.
*
* @param string if !=null,authenticate with this method ($userMethod).
*
* @return mixed Returns a string containing the name of the best
* supported authentication method or a PEAR_Error object
* if a failure condition is encountered.
* @access private
* @since 1.0
*/
function _getBestAuthMethod($userMethod = null)
{
/*
return 'USER';
return 'APOP';
return 'DIGEST-MD5';
return 'CRAM-MD5';
*/
$this->_parseCapability();
//unset($this->_capability['sasl']);
if (isset($this->_capability['sasl']) ){
$serverMethods=$this->_capability['sasl'];
} else {
$serverMethods=array('USER');
// Check for timestamp before attempting APOP
if ($this->_timestamp != null)
{
$serverMethods[] = 'APOP';
}
}
if ($userMethod !== null && $userMethod !== true) {
$methods = array();
$methods[] = $userMethod;
return $userMethod;
} else {
$methods = $this->supportedAuthMethods;
}
if (($methods != null) && ($serverMethods != null)) {
foreach ($methods as $method ) {
if (in_array($method, $serverMethods)) {
return $method;
}
}
$serverMethods=implode(',' , $serverMethods );
$myMethods=implode(',' ,$this->supportedAuthMethods);
return $this->_raiseError("$method NOT supported authentication method!. This server " .
"supports these methods: $serverMethods, but I support $myMethods");
} else {
return $this->_raiseError("This server don't support any Auth methods");
}
}
/**
* Handles the authentication using any known method
*
* @param string The userid to authenticate as.
* @param string The password to authenticate with.
* @param string The method to use ( if $usermethod == '' then the class chooses the best method (the stronger is the best ) )
*
* @return mixed string or PEAR_Error
* @access private
* @since 1.0
*/
function _cmdAuthenticate($uid , $pwd , $userMethod = null )
{
if (PEAR::isError($method = $this->_getBestAuthMethod($userMethod))) {
return $method;
}
if (!in_array($userMethod, $this->supportedAuthMethods)) {
return $this->_raiseError(
'Authentication method "' . $userMethod . '" is not supported.'
);
}
switch ($method) {
case 'DIGEST-MD5':
$result = $this->_authDigest_MD5( $uid , $pwd );
break;
case 'CRAM-MD5':
$result = $this->_authCRAM_MD5( $uid , $pwd );
break;
case 'LOGIN':
$result = $this->_authLOGIN( $uid , $pwd );
break;
case 'PLAIN':
$result = $this->_authPLAIN( $uid , $pwd );
break;
case 'APOP':
$result = $this->_cmdApop( $uid , $pwd );
// if APOP fails fallback to USER auth
if (PEAR::isError($result)){
//echo "APOP FAILED!!!\n";
$result=$this->_authUSER( $uid , $pwd );
}
break;
case 'USER':
$result = $this->_authUSER( $uid , $pwd );
break;
default :
$result = $this->_raiseError( "$method is not a supported authentication method" );
break;
}
return $result;
}
/**
* Authenticates the user using the USER-PASS method.
*
* @param string The userid to authenticate as.
* @param string The password to authenticate with.
*
* @return mixed true on success or PEAR_Error on failure
*
* @access private
* @since 1.0
*/
function _authUSER($user, $pass )
{
if ( PEAR::isError($ret=$this->_cmdUser($user) ) ){
return $ret;
}
if ( PEAR::isError($ret=$this->_cmdPass($pass) ) ){
return $ret;
}
return true;
}
/**
* Authenticates the user using the PLAIN method.
*
* @param string The userid to authenticate as.
* @param string The password to authenticate with.
*
* @return array Returns an array containing the response
*
* @access private
* @since 1.0
*/
function _authPLAIN($user, $pass )
{
$cmd=sprintf('AUTH PLAIN %s', base64_encode( chr(0) . $user . chr(0) . $pass ) );
if ( PEAR::isError( $ret = $this->_send($cmd) ) ) {
return $ret;
}
if ( PEAR::isError( $challenge = $this->_recvLn() ) ){
return $challenge;
}
if( PEAR::isError($ret=$this->_checkResponse($challenge) )){
return $ret;
}
return true;
}
/**
* Authenticates the user using the PLAIN method.
*
* @param string The userid to authenticate as.
* @param string The password to authenticate with.
*
* @return array Returns an array containing the response
*
* @access private
* @since 1.0
*/
function _authLOGIN($user, $pass )
{
$this->_send('AUTH LOGIN');
if ( PEAR::isError( $challenge = $this->_recvLn() ) ) {
return $challenge;
}
if( PEAR::isError($ret=$this->_checkResponse($challenge) )){
return $ret;
}
if ( PEAR::isError( $ret = $this->_send(sprintf('%s', base64_encode($user))) ) ) {
return $ret;
}
if ( PEAR::isError( $challenge = $this->_recvLn() ) ) {
return $challenge;
}
if( PEAR::isError($ret=$this->_checkResponse($challenge) )){
return $ret;
}
if ( PEAR::isError( $ret = $this->_send(sprintf('%s', base64_encode($pass))) ) ) {
return $ret;
}
if ( PEAR::isError( $challenge = $this->_recvLn() ) ) {
return $challenge;
}
return $this->_checkResponse($challenge);
}
/**
* Authenticates the user using the CRAM-MD5 method.
*
* @param string The userid to authenticate as.
* @param string The password to authenticate with.
*
* @return array Returns an array containing the response
*
* @access private
* @since 1.0
*/
function _authCRAM_MD5($uid, $pwd )
{
if (PEAR::isError($ret = $this->_send('AUTH CRAM-MD5'))) {
return $ret;
}
if (PEAR::isError($challenge = $this->_recvLn())) {
return $challenge;
}
if (PEAR::isError($ret=$this->_checkResponse($challenge))) {
return $ret;
}
// remove '+ '
$challenge=substr($challenge,2);
$challenge = base64_decode($challenge);
$cram = &Auth_SASL::factory('crammd5');
$auth_str = base64_encode($cram->getResponse($uid , $pwd , $challenge));
if (PEAR::isError($error = $this->_send($auth_str))) {
return $error;
}
if (PEAR::isError($ret = $this->_recvLn())) {
return $ret;
}
//echo "RET:$ret\n";
return $this->_checkResponse($ret);
}
/**
* Authenticates the user using the DIGEST-MD5 method.
*
* @param string The userid to authenticate as.
* @param string The password to authenticate with.
* @param string The efective user
*
* @return array Returns an array containing the response
*
* @access private
* @since 1.0
*/
function _authDigest_MD5($uid, $pwd)
{
if ( PEAR::isError( $ret = $this->_send( 'AUTH DIGEST-MD5' ) ) ) {
return $ret;
}
if ( PEAR::isError( $challenge = $this->_recvLn() ) ) {
return $challenge;
}
if( PEAR::isError($ret=$this->_checkResponse($challenge) )){
return $ret;
}
// remove '+ '
$challenge=substr($challenge,2);
$challenge = base64_decode( $challenge );
$digest = &Auth_SASL::factory('digestmd5');
$auth_str = base64_encode($digest->getResponse($uid, $pwd, $challenge, "localhost", "pop3" ));
if ( PEAR::isError($error = $this->_send( $auth_str ) ) ) {
return $error;
}
if ( PEAR::isError( $challenge = $this->_recvLn() ) ) {
return $challenge;
}
if( PEAR::isError($ret=$this->_checkResponse($challenge) )){
return $ret;
}
/*
* We don't use the protocol's third step because POP3 doesn't allow
* subsequent authentication, so we just silently ignore it.
*/
if ( PEAR::isError( $challenge = $this->_send("\r\n") ) ) {
return $challenge ;
}
if ( PEAR::isError( $challenge = $this->_recvLn() ) ) {
return $challenge;
}
return $this->_checkResponse($challenge);
}
/**
* Sends the APOP command
*
* @param $user Username to send
* @param $pass Password to send
* @return bool Success/Failure
*/
function _cmdApop($user, $pass)
{
if ($this->_state == NET_POP3_STATE_AUTHORISATION) {
if (!empty($this->_timestamp)) {
if(PEAR::isError($data = $this->_sendCmd('APOP ' . $user . ' ' . md5($this->_timestamp . $pass)) ) ){
return $data;
}
$this->_state = NET_POP3_STATE_TRANSACTION;
return true;
}
}
return $this->_raiseError('Not In NET_POP3_STATE_AUTHORISATION State1');
}
/**
* Returns the raw headers of the specified message.
*
* @param integer $msg_id Message number
* @return mixed Either raw headers or false on error
*/
function getRawHeaders($msg_id)
{
if ($this->_state == NET_POP3_STATE_TRANSACTION) {
return $this->_cmdTop($msg_id, 0);
}
return false;
}
/**
* Returns the headers of the specified message in an
* associative array. Array keys are the header names, array
* values are the header values. In the case of multiple headers
* having the same names, eg Received:, the array value will be
* an indexed array of all the header values.
*
* @param integer $msg_id Message number
* @return mixed Either array of headers or false on error
*/
function getParsedHeaders($msg_id)
{
if ($this->_state == NET_POP3_STATE_TRANSACTION) {
$raw_headers = rtrim($this->getRawHeaders($msg_id));
$raw_headers = preg_replace("/\r\n[ \t]+/", ' ', $raw_headers); // Unfold headers
$raw_headers = explode("\r\n", $raw_headers);
foreach ($raw_headers as $value) {
$name = substr($value, 0, $pos = strpos($value, ':'));
$value = ltrim(substr($value, $pos + 1));
if (isset($headers[$name]) AND is_array($headers[$name])) {
$headers[$name][] = $value;
} elseif (isset($headers[$name])) {
$headers[$name] = array($headers[$name], $value);
} else {
$headers[$name] = $value;
}
}
return $headers;
}
return false;
}
/**
* Returns the body of the message with given message number.
*
* @param integer $msg_id Message number
* @return mixed Either message body or false on error
*/
function getBody($msg_id)
{
if ($this->_state == NET_POP3_STATE_TRANSACTION) {
$msg = $this->_cmdRetr($msg_id);
return substr($msg, strpos($msg, "\r\n\r\n")+4);
}
return false;
}
/**
* Returns the entire message with given message number.
*
* @param integer $msg_id Message number
* @return mixed Either entire message or false on error
*/
function getMsg($msg_id)
{
if ($this->_state == NET_POP3_STATE_TRANSACTION) {
return $this->_cmdRetr($msg_id);
}
return false;
}
/**
* Returns the size of the maildrop
*
* @return mixed Either size of maildrop or false on error
*/
function getSize()
{
if ($this->_state == NET_POP3_STATE_TRANSACTION) {
if (isset($this->_maildrop['size'])) {
return $this->_maildrop['size'];
} else {
list(, $size) = $this->_cmdStat();
return $size;
}
}
return false;
}
/**
* Returns number of messages in this maildrop
*
* @return mixed Either number of messages or false on error
*/
function numMsg()
{
if ($this->_state == NET_POP3_STATE_TRANSACTION) {
if (isset($this->_maildrop['num_msg'])) {
return $this->_maildrop['num_msg'];
} else {
list($num_msg, ) = $this->_cmdStat();
return $num_msg;
}
}
return false;
}
/**
* Marks a message for deletion. Only will be deleted if the
* disconnect() method is called.
*
* @param integer $msg_id Message to delete
* @return bool Success/Failure
*/
function deleteMsg($msg_id)
{
if ($this->_state == NET_POP3_STATE_TRANSACTION) {
return $this->_cmdDele($msg_id);
}
return false;
}
/**
* Combination of LIST/UIDL commands, returns an array
* of data
*
* @param integer $msg_id Optional message number
* @return mixed Array of data or false on error
*/
function getListing($msg_id = null)
{
if ($this->_state == NET_POP3_STATE_TRANSACTION) {
if (!isset($msg_id)){
$list=array();
if ($list = $this->_cmdList()) {
if ($uidl = $this->_cmdUidl()) {
foreach ($uidl as $i => $value) {
$list[$i]['uidl'] = $value['uidl'];
}
}
return $list;
}else{
return array();
}
} else {
if ($list = $this->_cmdList($msg_id) AND $uidl = $this->_cmdUidl($msg_id)) {
return array_merge($list, $uidl);
}
}
}
return false;
}
/**
* Sends the USER command
*
* @param string $user Username to send
* @return bool Success/Failure
*/
function _cmdUser($user)
{
if ($this->_state == NET_POP3_STATE_AUTHORISATION) {
return $this->_sendCmd('USER ' . $user);
}
return $this->_raiseError('Not In NET_POP3_STATE_AUTHORISATION State');
}
/**
* Sends the PASS command
*
* @param string $pass Password to send
* @return bool Success/Failure
*/
function _cmdPass($pass)
{
if ($this->_state == NET_POP3_STATE_AUTHORISATION) {
return $this->_sendCmd('PASS ' . $pass);
}
return $this->_raiseError('Not In NET_POP3_STATE_AUTHORISATION State');
}
/**
* Sends the STAT command
*
* @return mixed Indexed array of number of messages and
* maildrop size, or false on error.
*/
function _cmdStat()
{
if ($this->_state == NET_POP3_STATE_TRANSACTION) {
if(!PEAR::isError($data = $this->_sendCmd('STAT'))){
sscanf($data, '+OK %d %d', $msg_num, $size);
$this->_maildrop['num_msg'] = $msg_num;
$this->_maildrop['size'] = $size;
return array($msg_num, $size);
}
}
return false;
}
/**
* Sends the LIST command
*
* @param integer $msg_id Optional message number
* @return mixed Indexed array of msg_id/msg size or
* false on error
*/
function _cmdList($msg_id = null)
{
$return=array();
if ($this->_state == NET_POP3_STATE_TRANSACTION) {
if (!isset($msg_id)) {
if(!PEAR::isError($data = $this->_sendCmd('LIST') )){
$data = $this->_getMultiline();
$data = explode("\r\n", $data);
foreach ($data as $line) {
if($line !=''){
sscanf($line, '%s %s', $msg_id, $size);
$return[] = array('msg_id' => $msg_id, 'size' => $size);
}
}
return $return;
}
} else {
if(!PEAR::isError($data = $this->_sendCmd('LIST ' . $msg_id))){
if($data!=''){
sscanf($data, '+OK %d %d', $msg_id, $size);
return array('msg_id' => $msg_id, 'size' => $size);
}
return array();
}
}
}
return false;
}
/**
* Sends the RETR command
*
* @param integer $msg_id The message number to retrieve
* @return mixed The message or false on error
*/
function _cmdRetr($msg_id)
{
if ($this->_state == NET_POP3_STATE_TRANSACTION) {
if(!PEAR::isError($data = $this->_sendCmd('RETR ' . $msg_id) )){
$data = $this->_getMultiline();
return $data;
}
}
return false;
}
/**
* Sends the DELE command
*
* @param integer $msg_id Message number to mark as deleted
* @return bool Success/Failure
*/
function _cmdDele($msg_id)
{
if ($this->_state == NET_POP3_STATE_TRANSACTION) {
return $this->_sendCmd('DELE ' . $msg_id);
}
return false;
}
/**
* Sends the NOOP command
*
* @return bool Success/Failure
*/
function _cmdNoop()
{
if ($this->_state == NET_POP3_STATE_TRANSACTION) {
if(!PEAR::isError($data = $this->_sendCmd('NOOP'))){
return true;
}
}
return false;
}
/**
* Sends the RSET command
*
* @return bool Success/Failure
*/
function _cmdRset()
{
if ($this->_state == NET_POP3_STATE_TRANSACTION) {
if(!PEAR::isError($data = $this->_sendCmd('RSET'))){
return true;
}
}
return false;
}
/**
* Sends the QUIT command
*
* @return bool Success/Failure
*/
function _cmdQuit()
{
$data = $this->_sendCmd('QUIT');
$this->_state = NET_POP3_STATE_DISCONNECTED;
$this->_socket->disconnect();
return (bool)$data;
}
/**
* Sends the TOP command
*
* @param integer $msg_id Message number
* @param integer $num_lines Number of lines to retrieve
* @return mixed Message data or false on error
*/
function _cmdTop($msg_id, $num_lines)
{
if ($this->_state == NET_POP3_STATE_TRANSACTION) {
if(!PEAR::isError($data = $this->_sendCmd('TOP ' . $msg_id . ' ' . $num_lines))){
return $this->_getMultiline();
}
}
return false;
}
/**
* Sends the UIDL command
*
* @param integer $msg_id Message number
* @return mixed indexed array of msg_id/uidl or false on error
*/
function _cmdUidl($msg_id = null)
{
if ($this->_state == NET_POP3_STATE_TRANSACTION) {
if (!isset($msg_id)) {
if(!PEAR::isError($data = $this->_sendCmd('UIDL') )){
$data = $this->_getMultiline();
$data = explode("\r\n", $data);
foreach ($data as $line) {
sscanf($line, '%d %s', $msg_id, $uidl);
$return[] = array('msg_id' => $msg_id, 'uidl' => $uidl);
}
return $return;
}
} else {
$data = $this->_sendCmd('UIDL ' . $msg_id);
sscanf($data, '+OK %d %s', $msg_id, $uidl);
return array('msg_id' => $msg_id, 'uidl' => $uidl);
}
}
return false;
}
/**
* Sends a command, checks the reponse, and
* if good returns the reponse, other wise
* returns false.
*
* @param string $cmd Command to send (\r\n will be appended)
* @return mixed First line of response if successful, otherwise false
*/
function _sendCmd($cmd)
{
if (PEAR::isError($result = $this->_send($cmd) )){
return $result ;
}
if (PEAR::isError($data = $this->_recvLn() )){
return $data;
}
if ( strtoupper(substr($data, 0, 3)) == '+OK') {
return $data;
}
return $this->_raiseError($data);
}
/**
* Reads a multiline reponse and returns the data
*
* @return string The reponse.
*/
function _getMultiline()
{
$data = '';
while(!PEAR::isError($tmp = $this->_recvLn() ) ) {
if($tmp == '.' || $tmp == "\n."){
return substr($data, 0, -2);
}
if (substr($tmp, 0, 2) == '..') {
$tmp = substr($tmp, 1);
}
$data .= $tmp . "\r\n";
}
return substr($data, 0, -2);
}
/**
* Sets the bebug state
*
* @param bool $debug
* @access public
* @return void
*/
function setDebug($debug=true)
{
$this->_debug=$debug;
}
/**
* 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->_debug) {
echo "C: $data\n";
}
if (PEAR::isError($error = $this->_socket->writeLine($data))) {
return $this->_raiseError('Failed to write to socket: ' . $error->getMessage());
}
return true;
}
/**
* Receive the given string of data from the server.
*
* @return mixed a line of response on success or a PEAR_Error object on failure.
*
* @access private
* @since 1.0
*/
function _recvLn()
{
if (PEAR::isError($lastline = $this->_socket->readLine(8192))) {
return $this->_raiseError('Failed to read from socket: ' . $this->lastline->getMessage());
}
if ($this->_debug) {
// S: means this data was sent by the POP3 Server
echo "S:$lastline\n" ;
}
return $lastline;
}
/**
* Checks de server Response
*
* @param string $response the response
* @return mixed true on success or a PEAR_Error object on failure.
*
* @access private
* @since 1.3.3
*/
function _checkResponse($response)
{
if (@substr(strtoupper($response), 0, 3) == '+OK') {
return true;
} else {
if (@substr(strtoupper($response), 0, 4) == '-ERR') {
return $this->_raiseError($response);
} else {
if (@substr(strtoupper($response), 0, 2) == '+ ') {
return true;
}
}
}
return $this->_raiseError("Unknown Response ($response)");
}
}
?>
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