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✏️ Editing: RequestBodyMultipart.php

<?php
/**
 * Copyright 2017 Facebook, Inc.
 *
 * You are hereby granted a non-exclusive, worldwide, royalty-free license to
 * use, copy, modify, and distribute this software in source code or binary
 * form for use in connection with the web services and APIs provided by
 * Facebook.
 *
 * As with any software that integrates with the Facebook platform, your use
 * of this software is subject to the Facebook Developer Principles and
 * Policies [http://developers.facebook.com/policy/]. This copyright notice
 * shall be included in all copies or substantial portions of the software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 */
namespace Facebook\Http;

use Facebook\FileUpload\FacebookFile;

/**
 * Class RequestBodyMultipartt
 *
 * Some things copied from Guzzle
 *
 * @package Facebook
 *
 * @see https://github.com/guzzle/guzzle/blob/master/src/Post/MultipartBody.php
 */
class RequestBodyMultipart implements RequestBodyInterface
{
    /**
     * @var string The boundary.
     */
    private $boundary;

/**
     * @var array The parameters to send with this request.
     */
    private $params;

/**
     * @var array The files to send with this request.
     */
    private $files = [];

/**
     * @param array  $params   The parameters to send with this request.
     * @param array  $files    The files to send with this request.
     * @param string $boundary Provide a specific boundary.
     */
    public function __construct(array $params = [], array $files = [], $boundary = null)
    {
        $this->params = $params;
        $this->files = $files;
        $this->boundary = $boundary ?: uniqid();
    }

/**
     * @inheritdoc
     */
    public function getBody()
    {
        $body = '';

// Compile normal params
        $params = $this->getNestedParams($this->params);
        foreach ($params as $k => $v) {
            $body .= $this->getParamString($k, $v);
        }

// Compile files
        foreach ($this->files as $k => $v) {
            $body .= $this->getFileString($k, $v);
        }

// Peace out
        $body .= "--{$this->boundary}--\r\n";

return $body;
    }

/**
     * Get the boundary
     *
     * @return string
     */
    public function getBoundary()
    {
        return $this->boundary;
    }

/**
     * Get the string needed to transfer a file.
     *
     * @param string       $name
     * @param FacebookFile $file
     *
     * @return string
     */
    private function getFileString($name, FacebookFile $file)
    {
        return sprintf(
            "--%s\r\nContent-Disposition: form-data; name=\"%s\"; filename=\"%s\"%s\r\n\r\n%s\r\n",
            $this->boundary,
            $name,
            $file->getFileName(),
            $this->getFileHeaders($file),
            $file->getContents()
        );
    }

/**
     * Get the string needed to transfer a POST field.
     *
     * @param string $name
     * @param string $value
     *
     * @return string
     */
    private function getParamString($name, $value)
    {
        return sprintf(
            "--%s\r\nContent-Disposition: form-data; name=\"%s\"\r\n\r\n%s\r\n",
            $this->boundary,
            $name,
            $value
        );
    }

/**
     * Returns the params as an array of nested params.
     *
     * @param array $params
     *
     * @return array
     */
    private function getNestedParams(array $params)
    {
        $query = http_build_query($params, null, '&');
        $params = explode('&', $query);
        $result = [];

foreach ($params as $param) {
            list($key, $value) = explode('=', $param, 2);
            $result[urldecode($key)] = urldecode($value);
        }

return $result;
    }

/**
     * Get the headers needed before transferring the content of a POST file.
     *
     * @param FacebookFile $file
     *
     * @return string
     */
    protected function getFileHeaders(FacebookFile $file)
    {
        return "\r\nContent-Type: {$file->getMimetype()}";
    }
}

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