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SFTP: Add Stream class
This commit is contained in:
terrafrost
parent
51d106b6ec
commit
5212c78152
659
phpseclib/Net/SFTP/Stream.php
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659
phpseclib/Net/SFTP/Stream.php
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@ -0,0 +1,659 @@
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<?php
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/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
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/**
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* SFTP Stream Wrapper
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*
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* Creates an sftp:// protocol handler that can be used with, for example, fopen(), dir(), etc.
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*
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* PHP version 5
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*
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* LICENSE: Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* @category Net
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* @package Net_SFTP_Stream
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* @author Jim Wigginton <terrafrost@php.net>
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* @copyright MMXIII Jim Wigginton
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* @license http://www.opensource.org/licenses/mit-license.html MIT License
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* @link http://phpseclib.sourceforge.net
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*/
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/**
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* Include Net_SSH2
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*/
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if (!class_exists('Net_SSH2')) {
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require_once('../Net/SSH2.php');
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}
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/**
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* SFTP Stream Wrapper
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*
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* @author Jim Wigginton <terrafrost@php.net>
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* @version 0.3.2
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* @access public
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* @package Net_SFTP_Stream
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*/
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class Net_SFTP_Stream {
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/**
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* SFTP instances
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*
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* Rather than re-create the connection we re-use instances if possible
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*
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* @var Array
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* @access static
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*/
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static $instances;
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/**
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* SFTP instance
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*
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* @var Object
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* @access private
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*/
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var $sftp;
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/**
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* Path
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*
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* @var String
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* @access private
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*/
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var $path;
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/**
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* Mode
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*
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* @var String
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* @access private
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*/
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var $mode;
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/**
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* Position
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*
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* @var Integer
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* @access private
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*/
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var $pos;
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/**
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* Size
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*
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* @var Integer
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* @access private
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*/
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var $size;
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/**
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* Directory entries
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*
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* @var Array
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* @access private
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*/
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var $entries;
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/**
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* EOF flag
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*
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* @var Boolean
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* @access private
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*/
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var $eof;
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/**
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* Context resource
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*
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* Technically this needs to be publically accessible so PHP can set it directly
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*
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* @var Resource
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* @access public
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*/
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var $context;
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/**
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* Path Parser
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*
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* Extract a path from a URI and actually connect to an SSH server if appropriate
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*
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* @param String $path
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* @return String
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* @access private
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*/
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function _parse_path($path)
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{
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extract(parse_url($path));
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if (!isset($host)) {
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return false;
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}
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if ($host[0] == '$') {
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$host = substr($host, 1);
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global $$host;
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if (!is_object($$host) || get_class($$host) != 'Net_sFTP') {
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return false;
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}
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$this->sftp = $$host;
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} else {
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$context = stream_context_get_options($this->context);
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if (isset($context['sftp']['session'])) {
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$sftp = $context['sftp']['session'];
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}
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if (isset($context['sftp']['sftp'])) {
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$sftp = $context['sftp']['sftp'];
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}
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if (isset($sftp) && is_object($sftp) && get_class($sftp) == 'Net_SFTP') {
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$this->sftp = $sftp;
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return $path;
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}
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if (isset($context['sftp']['username'])) {
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$user = $context['sftp']['username'];
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}
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if (isset($context['sftp']['password'])) {
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$pass = $context['sftp']['password'];
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}
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if (isset($context['sftp']['privkey']) && is_object($context['sftp']['privkey']) && get_Class($context['sftp']['privkey']) == 'Crypt_RSA') {
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$pass = $context['sftp']['privkey'];
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}
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if (!isset($user) || !isset($pass)) {
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return false;
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}
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if (isset($this->instances[$host][$port][$user][$pass])) {
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$this->sftp = $this->instances[$host][$port][$user][$pass];
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}
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$this->sftp = new Net_SFTP($host, isset($port) ? $port : 22);
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if (!$this->sftp->login($user, $pass)) {
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return false;
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}
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$this->instances[$host][$port][$user][$pass] = $this->sftp;
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}
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return $path;
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}
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/**
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* Opens file or URL
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*
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* @param String $path
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* @param String $mode
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* @param Integer $options
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* @param String $opened_path
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* @return Boolean
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* @access public
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*/
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function stream_open($path, $mode, $options, &$opened_path)
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{
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$path = $this->_parse_path($path);
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if ($path === false) {
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return false;
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}
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$this->path = $path;
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$this->size = $this->sftp->size($path);
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$this->mode = preg_replace('#[bt]$#', '', $mode);
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if ($this->size === false) {
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if ($this->mode[0] == 'r') {
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return false;
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}
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} else {
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switch ($this->mode[0]) {
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case 'x':
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return false;
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case 'w':
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case 'c':
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$this->sftp->truncate($path, 0);
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}
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}
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$this->pos = $this->mode[0] != 'a' ? 0 : $size;
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return true;
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}
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/**
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* Read from stream
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*
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* @param Integer $count
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* @return Mixed
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* @access public
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*/
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function stream_read($count)
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{
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switch ($this->mode) {
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case 'w':
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case 'a':
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case 'x':
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case 'c':
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return false;
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}
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// commented out because some files - eg. /dev/urandom - will say their size is 0 when in fact it's kinda infinite
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//if ($this->pos >= $this->size) {
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// $this->eof = true;
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// return false;
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//}
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$result = $this->sftp->get($this->path, false, $this->pos, $count);
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if ($result === false) {
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$this->eof = true;
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return false;
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}
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$this->pos+= strlen($result);
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return $result;
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}
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/**
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* Write to stream
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*
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* @param String $data
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* @return Mixed
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* @access public
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*/
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function stream_write($data)
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{
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switch ($this->mode) {
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case 'r':
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return false;
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}
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$result = $this->sftp->put($this->path, $data, NET_SFTP_STRING, $this->pos);
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if ($result === false) {
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return false;
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}
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$this->pos+= strlen($data);
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if ($this->pos > $this->size) {
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$this->size = $this->pos;
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}
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$this->eof = false;
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return strlen($data);
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}
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/**
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* Retrieve the current position of a stream
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*
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* @return Integer
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* @access public
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*/
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function stream_tell()
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{
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return $this->pos;
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}
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/**
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* Tests for end-of-file on a file pointer
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*
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* In my testing there are four classes functions that normally effect the pointer:
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* fseek, fputs / fwrite, fgets / fread and ftruncate.
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*
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* Only fgets / fread, however, results in feof() returning true. do fputs($fp, 'aaa') on a blank file and feof()
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* will return false. do fread($fp, 1) and feof() will then return true. do fseek($fp, 10) on ablank file and feof()
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* will return false. do fread($fp, 1) and feof() will then return true.
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*
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* @return Boolean
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* @access public
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*/
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function stream_eof()
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{
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return $this->eof;
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}
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/**
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* Seeks to specific location in a stream
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*
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* @param Integer $offset
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* @param Integer $whence
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* @return Boolean
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* @access public
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*/
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function stream_seek($offset, $whence)
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{
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switch ($whence) {
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case SEEK_SET:
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if ($offset >= $this->size || $offset < 0) {
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return false;
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}
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break;
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case SEEK_CUR:
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$offset+= $this->pos;
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break;
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case SEEK_END:
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$offset+= $this->size;
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}
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$this->pos = $offset;
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$this->eof = false;
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return true;
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}
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/**
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* Change stream options
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*
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* @param String $path
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* @param Integer $option
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* @param Mixed $var
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* @return Boolean
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* @access public
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*/
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function stream_metadata($path, $option, $var)
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{
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$path = $this->_parse_path($path);
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if ($path === false) {
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return false;
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}
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// stream_metadata was introduced in PHP 5.4.0 but as of 5.4.11 the constants haven't been defined
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// see http://www.php.net/streamwrapper.stream-metadata and https://bugs.php.net/64246
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// and https://github.com/php/php-src/blob/master/main/php_streams.h#L592
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switch ($option) {
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case 1: // PHP_STREAM_META_TOUCH
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return $this->sftp->touch($path, $var[0], $var[1]);
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case 2: // PHP_STREAM_OWNER_NAME
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case 3: // PHP_STREAM_GROUP_NAME
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return false;
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case 4: // PHP_STREAM_META_OWNER
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return $this->sftp->chown($path, $var);
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case 5: // PHP_STREAM_META_GROUP
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return $this->sftp->chgrp($path, $var);
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case 6: // PHP_STREAM_META_ACCESS
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return $this->sftp->chmod($path, $var) !== false;
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}
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}
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/**
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* Retrieve the underlaying resource
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*
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* @param Integer $cast_as
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* @return Resource
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* @access public
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*/
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function stream_cast($cast_as)
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{
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return $this->sftp->fsock;
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}
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/**
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* Advisory file locking
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*
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* @param Integer $operation
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* @return Boolean
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* @access public
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*/
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function stream_lock($operation)
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{
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return false;
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}
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/**
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* Renames a file or directory
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*
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* Attempts to rename oldname to newname, moving it between directories if necessary.
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* If newname exists, it will be overwritten. This is a departure from what Net_SFTP
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* does.
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*
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* @param String $path_from
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* @param String $path_to
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* @return Boolean
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* @access public
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*/
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function rename($path_from, $path_to)
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{
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$path1 = parse_url($path_from);
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$path2 = parse_url($path_to);
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unset($path1['path'], $path2['path']);
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if ($path1 != $path2) {
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return false;
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}
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$path_from = $this->_parse_path($path_from);
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$path_to = parse_url($path_to);
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if ($path_from == false) {
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return false;
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}
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$path_to = $path_to['path']; // the $component part of parse_url() was added in PHP 5.1.2
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// "It is an error if there already exists a file with the name specified by newpath."
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// -- http://tools.ietf.org/html/draft-ietf-secsh-filexfer-02#section-6.5
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if (!$this->sftp->rename($path_from, $path_to)) {
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if ($this->sftp->stat($path_to)) {
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return $this->sftp->delete($path_to, true) && $this->sftp->rename($path_from, $path_to);
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}
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return false;
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}
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return true;
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}
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/**
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* Open directory handle
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*
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* The only $options is "whether or not to enforce safe_mode (0x04)". Since safe mode was deprecated in 5.3 and
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* removed in 5.4 I'm just going to ignore it
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*
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* @param String $path
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* @param Integer $options
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* @return Boolean
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* @access public
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*/
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function dir_opendir($path, $options)
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{
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$path = $this->_parse_path($path);
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if ($path === false) {
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return false;
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}
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$this->pos = 0;
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$this->entries = $this->sftp->nlist($path);
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return $this->entries !== false;
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}
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|
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/**
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* Read entry from directory handle
|
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*
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* @return Mixed
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* @access public
|
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*/
|
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function dir_readdir()
|
||||
{
|
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if (isset($this->entries[$this->pos])) {
|
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return $this->entries[$this->pos++];
|
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}
|
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return false;
|
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}
|
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|
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/**
|
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* Rewind directory handle
|
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*
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* @return Boolean
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* @access public
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*/
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function dir_rewinddir()
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{
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$this->pos = 0;
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return true;
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}
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|
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/**
|
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* Close directory handle
|
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*
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* @return Boolean
|
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* @access public
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*/
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function dir_closedir()
|
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{
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return true;
|
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}
|
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|
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/**
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* Create a directory
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*
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* Only valid $options is STREAM_MKDIR_RECURSIVE
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*
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* @param String $path
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* @param Integer $mode
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* @param Integer $options
|
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* @return Boolean
|
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* @access public
|
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*/
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function mkdir($path, $mode, $options)
|
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{
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$path = $this->_parse_path($path);
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if ($path === false) {
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return false;
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}
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return $this->sftp->mkdir($path, $mode, $options & STREAM_MKDIR_RECURSIVE);
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}
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/**
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* Removes a directory
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*
|
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* Only valid $options is STREAM_MKDIR_RECURSIVE per <http://php.net/streamwrapper.rmdir>, however,
|
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* <http://php.net/rmdir> does not have a $recursive parameter as mkdir() does so I don't know how
|
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* STREAM_MKDIR_RECURSIVE is supposed to be set. Also, when I try it out with rmdir() I get 8 as
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* $options. What does 8 correspond to?
|
||||
*
|
||||
* @param String $path
|
||||
* @param Integer $mode
|
||||
* @param Integer $options
|
||||
* @return Boolean
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* @access public
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*/
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function rmdir($path, $options)
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{
|
||||
$path = $this->_parse_path($path);
|
||||
if ($path === false) {
|
||||
return false;
|
||||
}
|
||||
|
||||
return $this->sftp->rmdir($path);
|
||||
}
|
||||
|
||||
/**
|
||||
* Flushes the output
|
||||
*
|
||||
* See <http://php.net/fflush>. Always returns true because Net_SFTP doesn't cache stuff before writing
|
||||
*
|
||||
* @return Boolean
|
||||
* @access public
|
||||
*/
|
||||
function stream_flush()
|
||||
{
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* Retrieve information about a file resource
|
||||
*
|
||||
* @return Mixed
|
||||
* @access public
|
||||
*/
|
||||
function stream_stat()
|
||||
{
|
||||
$results = $this->sftp->stat($this->path);
|
||||
if ($results === false) {
|
||||
return false;
|
||||
}
|
||||
return $results;
|
||||
}
|
||||
|
||||
/**
|
||||
* Delete a file
|
||||
*
|
||||
* @param String $path
|
||||
* @return Boolean
|
||||
* @access public
|
||||
*/
|
||||
function unlink($path)
|
||||
{
|
||||
$path = $this->_parse_path($path);
|
||||
if ($path === false) {
|
||||
return false;
|
||||
}
|
||||
|
||||
return $this->sftp->delete($path, false);
|
||||
}
|
||||
|
||||
/**
|
||||
* Retrieve information about a file
|
||||
*
|
||||
* Ignores the STREAM_URL_STAT_QUIET flag because the entirety of Net_SFTP_Stream is quiet by default
|
||||
* might be worthwhile to reconstruct bits 12-16 (ie. the file type) if mode doesn't have them but we'll
|
||||
* cross that bridge when and if it's reached
|
||||
*
|
||||
* @param String $path
|
||||
* @param Integer $flags
|
||||
* @return Mixed
|
||||
* @access public
|
||||
*/
|
||||
function url_stat($path, $flags)
|
||||
{
|
||||
$path = $this->_parse_path($path);
|
||||
if ($path === false) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$results = $flags & STREAM_URL_STAT_LINK ? $this->sftp->lstat($path) : $this->sftp->stat($path);
|
||||
if ($results === false) {
|
||||
return false;
|
||||
}
|
||||
|
||||
return $results;
|
||||
}
|
||||
|
||||
/**
|
||||
* Truncate stream
|
||||
*
|
||||
* @param Integer $new_size
|
||||
* @return Boolean
|
||||
* @access public
|
||||
*/
|
||||
function stream_truncate($new_size)
|
||||
{
|
||||
if (!$this->sftp->truncate($this->path, $new_size)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$this->eof = false;
|
||||
$this->size = $new_size;
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* Change stream options
|
||||
*
|
||||
* STREAM_OPTION_WRITE_BUFFER isn't supported for the same reason stream_flush isn't.
|
||||
* The other two aren't supported because of limitations in Net_SFTP.
|
||||
*
|
||||
* @param Integer $option
|
||||
* @param Integer $arg1
|
||||
* @param Integer $arg2
|
||||
* @return Boolean
|
||||
* @access public
|
||||
*/
|
||||
function stream_set_option($option, $arg1, $arg2)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
stream_wrapper_register('sftp', 'Net_SFTP_Stream');
|
||||
Loading…
Reference in New Issue
Block a user