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<?php

/**
 * SimplePie
 *
 * A PHP-Based RSS and Atom Feed Framework.
 * Takes the hard work out of managing a complete RSS/Atom solution.
 *
 * Copyright (c) 2004-2022, Ryan Parman, Sam Sneddon, Ryan McCue, and contributors
 * 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.
 *
 * 	* Neither the name of the SimplePie Team nor the names of its contributors may 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 HOLDERS
 * AND 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.
 *
 * @package SimplePie
 * @copyright 2004-2016 Ryan Parman, Sam Sneddon, Ryan McCue
 * @author Ryan Parman
 * @author Sam Sneddon
 * @author Ryan McCue
 * @link http://simplepie.org/ SimplePie
 * @license http://www.opensource.org/licenses/bsd-license.php BSD License
 */

namespace SimplePie;

/**
 * Used for fetching remote files and reading local files
 *
 * Supports HTTP 1.0 via cURL or fsockopen, with spotty HTTP 1.1 support
 *
 * This class can be overloaded with {@see \SimplePie\SimplePie::set_file_class()}
 *
 * @package SimplePie
 * @subpackage HTTP
 * @todo Move to properly supporting RFC2616 (HTTP/1.1)
 */
class File
{
    public $url;
    public $useragent;
    public $success = true;
    public $headers = [];
    public $body;
    public $status_code = 0;
    public $redirects = 0;
    public $error;
    public $method = \SimplePie\SimplePie::FILE_SOURCE_NONE;
    public $permanent_url;

    public function __construct($url, $timeout = 10, $redirects = 5, $headers = null, $useragent = null, $force_fsockopen = false, $curl_options = [])
    {
        if (class_exists('idna_convert')) {
            $idn = new \idna_convert();
            $parsed = \SimplePie\Misc::parse_url($url);
            $url = \SimplePie\Misc::compress_parse_url($parsed['scheme'], $idn->encode($parsed['authority']), $parsed['path'], $parsed['query'], null);
        }
        $this->url = $url;
        $this->permanent_url = $url;
        $this->useragent = $useragent;
        if (preg_match('/^http(s)?:\/\//i', $url)) {
            if ($useragent === null) {
                $useragent = ini_get('user_agent');
                $this->useragent = $useragent;
            }
            if (!is_array($headers)) {
                $headers = [];
            }
            if (!$force_fsockopen && function_exists('curl_exec')) {
                $this->method = \SimplePie\SimplePie::FILE_SOURCE_REMOTE | \SimplePie\SimplePie::FILE_SOURCE_CURL;
                $fp = curl_init();
                $headers2 = [];
                foreach ($headers as $key => $value) {
                    $headers2[] = "$key: $value";
                }
                if (version_compare(\SimplePie\Misc::get_curl_version(), '7.10.5', '>=')) {
                    curl_setopt($fp, CURLOPT_ENCODING, '');
                }
                curl_setopt($fp, CURLOPT_URL, $url);
                curl_setopt($fp, CURLOPT_HEADER, 1);
                curl_setopt($fp, CURLOPT_RETURNTRANSFER, 1);
                curl_setopt($fp, CURLOPT_FAILONERROR, 1);
                curl_setopt($fp, CURLOPT_TIMEOUT, $timeout);
                curl_setopt($fp, CURLOPT_CONNECTTIMEOUT, $timeout);
                curl_setopt($fp, CURLOPT_REFERER, \SimplePie\Misc::url_remove_credentials($url));
                curl_setopt($fp, CURLOPT_USERAGENT, $useragent);
                curl_setopt($fp, CURLOPT_HTTPHEADER, $headers2);
                foreach ($curl_options as $curl_param => $curl_value) {
                    curl_setopt($fp, $curl_param, $curl_value);
                }

                $this->headers = curl_exec($fp);
                if (curl_errno($fp) === 23 || curl_errno($fp) === 61) {
                    curl_setopt($fp, CURLOPT_ENCODING, 'none');
                    $this->headers = curl_exec($fp);
                }
                $this->status_code = curl_getinfo($fp, CURLINFO_HTTP_CODE);
                if (curl_errno($fp)) {
                    $this->error = 'cURL error ' . curl_errno($fp) . ': ' . curl_error($fp);
                    $this->success = false;
                } else {
                    // Use the updated url provided by curl_getinfo after any redirects.
                    if ($info = curl_getinfo($fp)) {
                        $this->url = $info['url'];
                    }
                    curl_close($fp);
                    $this->headers = \SimplePie\HTTP\Parser::prepareHeaders($this->headers, $info['redirect_count'] + 1);
                    $parser = new \SimplePie\HTTP\Parser($this->headers);
                    if ($parser->parse()) {
                        $this->headers = $parser->headers;
                        $this->body = trim($parser->body);
                        $this->status_code = $parser->status_code;
                        if ((in_array($this->status_code, [300, 301, 302, 303, 307]) || $this->status_code > 307 && $this->status_code < 400) && isset($this->headers['location']) && $this->redirects < $redirects) {
                            $this->redirects++;
                            $location = \SimplePie\Misc::absolutize_url($this->headers['location'], $url);
                            $previousStatusCode = $this->status_code;
                            $this->__construct($location, $timeout, $redirects, $headers, $useragent, $force_fsockopen, $curl_options);
                            $this->permanent_url = ($previousStatusCode == 301) ? $location : $url;
                            return;
                        }
                    }
                }
            } else {
                $this->method = \SimplePie\SimplePie::FILE_SOURCE_REMOTE | \SimplePie\SimplePie::FILE_SOURCE_FSOCKOPEN;
                $url_parts = parse_url($url);
                $socket_host = $url_parts['host'];
                if (isset($url_parts['scheme']) && strtolower($url_parts['scheme']) === 'https') {
                    $socket_host = "ssl://$url_parts[host]";
                    $url_parts['port'] = 443;
                }
                if (!isset($url_parts['port'])) {
                    $url_parts['port'] = 80;
                }
                $fp = @fsockopen($socket_host, $url_parts['port'], $errno, $errstr, $timeout);
                if (!$fp) {
                    $this->error = 'fsockopen error: ' . $errstr;
                    $this->success = false;
                } else {
                    stream_set_timeout($fp, $timeout);
                    if (isset($url_parts['path'])) {
                        if (isset($url_parts['query'])) {
                            $get = "$url_parts[path]?$url_parts[query]";
                        } else {
                            $get = $url_parts['path'];
                        }
                    } else {
                        $get = '/';
                    }
                    $out = "GET $get HTTP/1.1\r\n";
                    $out .= "Host: $url_parts[host]\r\n";
                    $out .= "User-Agent: $useragent\r\n";
                    if (extension_loaded('zlib')) {
                        $out .= "Accept-Encoding: x-gzip,gzip,deflate\r\n";
                    }

                    if (isset($url_parts['user']) && isset($url_parts['pass'])) {
                        $out .= "Authorization: Basic " . base64_encode("$url_parts[user]:$url_parts[pass]") . "\r\n";
                    }
                    foreach ($headers as $key => $value) {
                        $out .= "$key: $value\r\n";
                    }
                    $out .= "Connection: Close\r\n\r\n";
                    fwrite($fp, $out);

                    $info = stream_get_meta_data($fp);

                    $this->headers = '';
                    while (!$info['eof'] && !$info['timed_out']) {
                        $this->headers .= fread($fp, 1160);
                        $info = stream_get_meta_data($fp);
                    }
                    if (!$info['timed_out']) {
                        $parser = new \SimplePie\HTTP\Parser($this->headers);
                        if ($parser->parse()) {
                            $this->headers = $parser->headers;
                            $this->body = $parser->body;
                            $this->status_code = $parser->status_code;
                            if ((in_array($this->status_code, [300, 301, 302, 303, 307]) || $this->status_code > 307 && $this->status_code < 400) && isset($this->headers['location']) && $this->redirects < $redirects) {
                                $this->redirects++;
                                $location = \SimplePie\Misc::absolutize_url($this->headers['location'], $url);
                                $previousStatusCode = $this->status_code;
                                $this->__construct($location, $timeout, $redirects, $headers, $useragent, $force_fsockopen, $curl_options);
                                $this->permanent_url = ($previousStatusCode == 301) ? $location : $url;
                                return;
                            }
                            if (isset($this->headers['content-encoding'])) {
                                // Hey, we act dumb elsewhere, so let's do that here too
                                switch (strtolower(trim($this->headers['content-encoding'], "\x09\x0A\x0D\x20"))) {
                                    case 'gzip':
                                    case 'x-gzip':
                                        $decoder = new \SimplePie\Gzdecode($this->body);
                                        if (!$decoder->parse()) {
                                            $this->error = 'Unable to decode HTTP "gzip" stream';
                                            $this->success = false;
                                        } else {
                                            $this->body = trim($decoder->data);
                                        }
                                        break;

                                    case 'deflate':
                                        if (($decompressed = gzinflate($this->body)) !== false) {
                                            $this->body = $decompressed;
                                        } elseif (($decompressed = gzuncompress($this->body)) !== false) {
                                            $this->body = $decompressed;
                                        } elseif (function_exists('gzdecode') && ($decompressed = gzdecode($this->body)) !== false) {
                                            $this->body = $decompressed;
                                        } else {
                                            $this->error = 'Unable to decode HTTP "deflate" stream';
                                            $this->success = false;
                                        }
                                        break;

                                    default:
                                        $this->error = 'Unknown content coding';
                                        $this->success = false;
                                }
                            }
                        }
                    } else {
                        $this->error = 'fsocket timed out';
                        $this->success = false;
                    }
                    fclose($fp);
                }
            }
        } else {
            $this->method = \SimplePie\SimplePie::FILE_SOURCE_LOCAL | \SimplePie\SimplePie::FILE_SOURCE_FILE_GET_CONTENTS;
            if (empty($url) || !($this->body = trim(file_get_contents($url)))) {
                $this->error = 'file_get_contents could not read the file';
                $this->success = false;
            }
        }
    }
}

class_alias('SimplePie\File', 'SimplePie_File');