Subversion-Projekte lars-tiefland.php_share

<?php

/**

 * Helper class for building multipart/form-data request body

 *

 * PHP version 5

 *

 * LICENSE:

 *

 * Copyright (c) 2008-2011, Alexey Borzov <avb@php.net>

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 *    * Redistributions of source code must retain the above copyright

 *      notice, this list of conditions and the following disclaimer.

 *    * 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.

 *    * 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.

 *

 * @category   HTTP

 * @package    HTTP_Request2

 * @author     Alexey Borzov <avb@php.net>

 * @license    http://opensource.org/licenses/bsd-license.php New BSD License

 * @version    SVN: $Id: MultipartBody.php 308322 2011-02-14 13:58:03Z avb $

 * @link       http://pear.php.net/package/HTTP_Request2

 */

/**

 * Class for building multipart/form-data request body

 *

 * The class helps to reduce memory consumption by streaming large file uploads

 * from disk, it also allows monitoring of upload progress (see request #7630)

 *

 * @category   HTTP

 * @package    HTTP_Request2

 * @author     Alexey Borzov <avb@php.net>

 * @version    Release: 2.0.0RC1

 * @link       http://tools.ietf.org/html/rfc1867

 */

class HTTP_Request2_MultipartBody

{

   /**

    * MIME boundary

    * @var  string

    */

    private $_boundary;

   /**

    * Form parameters added via {@link HTTP_Request2::addPostParameter()}

    * @var  array

    */

    private $_params = array();

   /**

    * File uploads added via {@link HTTP_Request2::addUpload()}

    * @var  array

    */

    private $_uploads = array();

   /**

    * Header for parts with parameters

    * @var  string

    */

    private $_headerParam = "--%s\r\nContent-Disposition: form-data; name=\"%s\"\r\n\r\n";

   /**

    * Header for parts with uploads

    * @var  string

    */

    private $_headerUpload = "--%s\r\nContent-Disposition: form-data; name=\"%s\"; filename=\"%s\"\r\nContent-Type: %s\r\n\r\n";

   /**

    * Current position in parameter and upload arrays

    *

    * First number is index of "current" part, second number is position within

    * "current" part

    *

    * @var  array

    */

    private $_pos = array(0, 0);

   /**

    * Constructor. Sets the arrays with POST data.

    *

    * @param    array   values of form fields set via {@link HTTP_Request2::addPostParameter()}

    * @param    array   file uploads set via {@link HTTP_Request2::addUpload()}

    * @param    bool    whether to append brackets to array variable names

    */

    public function __construct(array $params, array $uploads, $useBrackets = true)

    {

        $this->_params = self::_flattenArray('', $params, $useBrackets);

        foreach ($uploads as $fieldName => $f) {

            if (!is_array($f['fp'])) {

                $this->_uploads[] = $f + array('name' => $fieldName);

            } else {

                for ($i = 0; $i < count($f['fp']); $i++) {

                    $upload = array(

                        'name' => ($useBrackets? $fieldName . '[' . $i . ']': $fieldName)

                    );

                    foreach (array('fp', 'filename', 'size', 'type') as $key) {

                        $upload[$key] = $f[$key][$i];

                    }

                    $this->_uploads[] = $upload;

                }

            }

        }

    }

   /**

    * Returns the length of the body to use in Content-Length header

    *

    * @return   integer

    */

    public function getLength()

    {

        $boundaryLength     = strlen($this->getBoundary());

        $headerParamLength  = strlen($this->_headerParam) - 4 + $boundaryLength;

        $headerUploadLength = strlen($this->_headerUpload) - 8 + $boundaryLength;

        $length             = $boundaryLength + 6;

        foreach ($this->_params as $p) {

            $length += $headerParamLength + strlen($p[0]) + strlen($p[1]) + 2;

        }

        foreach ($this->_uploads as $u) {

            $length += $headerUploadLength + strlen($u['name']) + strlen($u['type']) +

                       strlen($u['filename']) + $u['size'] + 2;

        }

        return $length;

    }

   /**

    * Returns the boundary to use in Content-Type header

    *

    * @return   string

    */

    public function getBoundary()

    {

        if (empty($this->_boundary)) {

            $this->_boundary = '--' . md5('PEAR-HTTP_Request2-' . microtime());

        }

        return $this->_boundary;

    }

   /**

    * Returns next chunk of request body

    *

    * @param    integer Amount of bytes to read

    * @return   string  Up to $length bytes of data, empty string if at end

    */

    public function read($length)

    {

        $ret         = '';

        $boundary    = $this->getBoundary();

        $paramCount  = count($this->_params);

        $uploadCount = count($this->_uploads);

        while ($length > 0 && $this->_pos[0] <= $paramCount + $uploadCount) {

            $oldLength = $length;

            if ($this->_pos[0] < $paramCount) {

                $param = sprintf($this->_headerParam, $boundary,

                                 $this->_params[$this->_pos[0]][0]) .

                         $this->_params[$this->_pos[0]][1] . "\r\n";

                $ret    .= substr($param, $this->_pos[1], $length);

                $length -= min(strlen($param) - $this->_pos[1], $length);

            } elseif ($this->_pos[0] < $paramCount + $uploadCount) {

                $pos    = $this->_pos[0] - $paramCount;

                $header = sprintf($this->_headerUpload, $boundary,

                                  $this->_uploads[$pos]['name'],

                                  $this->_uploads[$pos]['filename'],

                                  $this->_uploads[$pos]['type']);

                if ($this->_pos[1] < strlen($header)) {

                    $ret    .= substr($header, $this->_pos[1], $length);

                    $length -= min(strlen($header) - $this->_pos[1], $length);

                }

                $filePos  = max(0, $this->_pos[1] - strlen($header));

                if ($length > 0 && $filePos < $this->_uploads[$pos]['size']) {

                    $ret     .= fread($this->_uploads[$pos]['fp'], $length);

                    $length  -= min($length, $this->_uploads[$pos]['size'] - $filePos);

                }

                if ($length > 0) {

                    $start   = $this->_pos[1] + ($oldLength - $length) -

                               strlen($header) - $this->_uploads[$pos]['size'];

                    $ret    .= substr("\r\n", $start, $length);

                    $length -= min(2 - $start, $length);

                }

            } else {

                $closing  = '--' . $boundary . "--\r\n";

                $ret     .= substr($closing, $this->_pos[1], $length);

                $length  -= min(strlen($closing) - $this->_pos[1], $length);

            }

            if ($length > 0) {

                $this->_pos     = array($this->_pos[0] + 1, 0);

            } else {

                $this->_pos[1] += $oldLength;

            }

        }

        return $ret;

    }

   /**

    * Sets the current position to the start of the body

    *

    * This allows reusing the same body in another request

    */

    public function rewind()

    {

        $this->_pos = array(0, 0);

        foreach ($this->_uploads as $u) {

            rewind($u['fp']);

        }

    }

   /**

    * Returns the body as string

    *

    * Note that it reads all file uploads into memory so it is a good idea not

    * to use this method with large file uploads and rely on read() instead.

    *

    * @return   string

    */

    public function __toString()

    {

        $this->rewind();

        return $this->read($this->getLength());

    }

   /**

    * Helper function to change the (probably multidimensional) associative array

    * into the simple one.

    *

    * @param    string  name for item

    * @param    mixed   item's values

    * @param    bool    whether to append [] to array variables' names

    * @return   array   array with the following items: array('item name', 'item value');

    */

    private static function _flattenArray($name, $values, $useBrackets)

    {

        if (!is_array($values)) {

            return array(array($name, $values));

        } else {

            $ret = array();

            foreach ($values as $k => $v) {

                if (empty($name)) {

                    $newName = $k;

                } elseif ($useBrackets) {

                    $newName = $name . '[' . $k . ']';

                } else {

                    $newName = $name;

                }

                $ret = array_merge($ret, self::_flattenArray($newName, $v, $useBrackets));

            }

            return $ret;

        }

    }

}

?>