269 lines
9.3 KiB
PHP
269 lines
9.3 KiB
PHP
<?php
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/**
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* Helper class for building multipart/form-data request body
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*
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* PHP version 5
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*
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* LICENSE
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*
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* This source file is subject to BSD 3-Clause License that is bundled
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* with this package in the file LICENSE and available at the URL
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* https://raw.github.com/pear/HTTP_Request2/trunk/docs/LICENSE
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*
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* @category HTTP
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* @package HTTP_Request2
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* @author Alexey Borzov <avb@php.net>
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* @copyright 2008-2016 Alexey Borzov <avb@php.net>
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* @license http://opensource.org/licenses/BSD-3-Clause BSD 3-Clause License
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* @link http://pear.php.net/package/HTTP_Request2
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*/
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/** Exception class for HTTP_Request2 package */
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require_once 'HTTP/Request2/Exception.php';
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/**
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* Class for building multipart/form-data request body
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*
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* The class helps to reduce memory consumption by streaming large file uploads
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* from disk, it also allows monitoring of upload progress (see request #7630)
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*
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* @category HTTP
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* @package HTTP_Request2
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* @author Alexey Borzov <avb@php.net>
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* @license http://opensource.org/licenses/BSD-3-Clause BSD 3-Clause License
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* @version Release: 2.3.0
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* @link http://pear.php.net/package/HTTP_Request2
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* @link http://tools.ietf.org/html/rfc1867
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*/
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class HTTP_Request2_MultipartBody
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{
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/**
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* MIME boundary
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* @var string
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*/
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private $_boundary;
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/**
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* Form parameters added via {@link HTTP_Request2::addPostParameter()}
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* @var array
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*/
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private $_params = array();
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/**
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* File uploads added via {@link HTTP_Request2::addUpload()}
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* @var array
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*/
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private $_uploads = array();
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/**
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* Header for parts with parameters
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* @var string
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*/
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private $_headerParam = "--%s\r\nContent-Disposition: form-data; name=\"%s\"\r\n\r\n";
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/**
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* Header for parts with uploads
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* @var string
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*/
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private $_headerUpload = "--%s\r\nContent-Disposition: form-data; name=\"%s\"; filename=\"%s\"\r\nContent-Type: %s\r\n\r\n";
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/**
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* Current position in parameter and upload arrays
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*
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* First number is index of "current" part, second number is position within
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* "current" part
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*
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* @var array
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*/
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private $_pos = array(0, 0);
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/**
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* Constructor. Sets the arrays with POST data.
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*
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* @param array $params values of form fields set via
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* {@link HTTP_Request2::addPostParameter()}
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* @param array $uploads file uploads set via
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* {@link HTTP_Request2::addUpload()}
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* @param bool $useBrackets whether to append brackets to array variable names
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*/
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public function __construct(array $params, array $uploads, $useBrackets = true)
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{
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$this->_params = self::_flattenArray('', $params, $useBrackets);
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foreach ($uploads as $fieldName => $f) {
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if (!is_array($f['fp'])) {
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$this->_uploads[] = $f + array('name' => $fieldName);
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} else {
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for ($i = 0; $i < count($f['fp']); $i++) {
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$upload = array(
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'name' => ($useBrackets? $fieldName . '[' . $i . ']': $fieldName)
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);
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foreach (array('fp', 'filename', 'size', 'type') as $key) {
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$upload[$key] = $f[$key][$i];
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}
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$this->_uploads[] = $upload;
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}
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}
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}
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}
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/**
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* Returns the length of the body to use in Content-Length header
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*
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* @return integer
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*/
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public function getLength()
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{
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$boundaryLength = strlen($this->getBoundary());
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$headerParamLength = strlen($this->_headerParam) - 4 + $boundaryLength;
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$headerUploadLength = strlen($this->_headerUpload) - 8 + $boundaryLength;
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$length = $boundaryLength + 6;
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foreach ($this->_params as $p) {
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$length += $headerParamLength + strlen($p[0]) + strlen($p[1]) + 2;
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}
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foreach ($this->_uploads as $u) {
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$length += $headerUploadLength + strlen($u['name']) + strlen($u['type']) +
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strlen($u['filename']) + $u['size'] + 2;
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}
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return $length;
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}
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/**
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* Returns the boundary to use in Content-Type header
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*
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* @return string
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*/
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public function getBoundary()
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{
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if (empty($this->_boundary)) {
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$this->_boundary = '--' . md5('PEAR-HTTP_Request2-' . microtime());
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}
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return $this->_boundary;
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}
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/**
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* Returns next chunk of request body
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*
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* @param integer $length Number of bytes to read
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*
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* @return string Up to $length bytes of data, empty string if at end
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* @throws HTTP_Request2_LogicException
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*/
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public function read($length)
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{
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$ret = '';
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$boundary = $this->getBoundary();
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$paramCount = count($this->_params);
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$uploadCount = count($this->_uploads);
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while ($length > 0 && $this->_pos[0] <= $paramCount + $uploadCount) {
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$oldLength = $length;
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if ($this->_pos[0] < $paramCount) {
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$param = sprintf(
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$this->_headerParam, $boundary, $this->_params[$this->_pos[0]][0]
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) . $this->_params[$this->_pos[0]][1] . "\r\n";
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$ret .= substr($param, $this->_pos[1], $length);
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$length -= min(strlen($param) - $this->_pos[1], $length);
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} elseif ($this->_pos[0] < $paramCount + $uploadCount) {
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$pos = $this->_pos[0] - $paramCount;
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$header = sprintf(
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$this->_headerUpload, $boundary, $this->_uploads[$pos]['name'],
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$this->_uploads[$pos]['filename'], $this->_uploads[$pos]['type']
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);
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if ($this->_pos[1] < strlen($header)) {
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$ret .= substr($header, $this->_pos[1], $length);
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$length -= min(strlen($header) - $this->_pos[1], $length);
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}
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$filePos = max(0, $this->_pos[1] - strlen($header));
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if ($filePos < $this->_uploads[$pos]['size']) {
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while ($length > 0 && !feof($this->_uploads[$pos]['fp'])) {
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if (false === ($chunk = fread($this->_uploads[$pos]['fp'], $length))) {
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throw new HTTP_Request2_LogicException(
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'Failed reading file upload', HTTP_Request2_Exception::READ_ERROR
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);
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}
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$ret .= $chunk;
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$length -= strlen($chunk);
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}
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}
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if ($length > 0) {
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$start = $this->_pos[1] + ($oldLength - $length) -
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strlen($header) - $this->_uploads[$pos]['size'];
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$ret .= substr("\r\n", $start, $length);
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$length -= min(2 - $start, $length);
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}
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} else {
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$closing = '--' . $boundary . "--\r\n";
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$ret .= substr($closing, $this->_pos[1], $length);
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$length -= min(strlen($closing) - $this->_pos[1], $length);
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}
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if ($length > 0) {
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$this->_pos = array($this->_pos[0] + 1, 0);
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} else {
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$this->_pos[1] += $oldLength;
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}
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}
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return $ret;
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}
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/**
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* Sets the current position to the start of the body
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*
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* This allows reusing the same body in another request
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*/
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public function rewind()
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{
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$this->_pos = array(0, 0);
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foreach ($this->_uploads as $u) {
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rewind($u['fp']);
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}
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}
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/**
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* Returns the body as string
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*
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* Note that it reads all file uploads into memory so it is a good idea not
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* to use this method with large file uploads and rely on read() instead.
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*
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* @return string
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*/
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public function __toString()
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{
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$this->rewind();
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return $this->read($this->getLength());
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}
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/**
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* Helper function to change the (probably multidimensional) associative array
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* into the simple one.
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*
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* @param string $name name for item
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* @param mixed $values item's values
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* @param bool $useBrackets whether to append [] to array variables' names
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*
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* @return array array with the following items: array('item name', 'item value');
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*/
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private static function _flattenArray($name, $values, $useBrackets)
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{
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if (!is_array($values)) {
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return array(array($name, $values));
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} else {
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$ret = array();
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foreach ($values as $k => $v) {
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if (empty($name)) {
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$newName = $k;
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} elseif ($useBrackets) {
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$newName = $name . '[' . $k . ']';
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} else {
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$newName = $name;
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}
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$ret = array_merge($ret, self::_flattenArray($newName, $v, $useBrackets));
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}
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return $ret;
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}
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}
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}
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?>
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