<?php

/**

 * SimplePie

 *

 * A PHP-Based RSS and Atom Feed Framework.

 * Takes the hard work out of managing a complete RSS/Atom solution.

 *

 * Copyright (c) 2004-2016, 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

 */

/**

 * 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::set_file_class()}

 *

 * @package SimplePie

 * @subpackage HTTP

 * @todo Move to properly supporting RFC2616 (HTTP/1.1)

 */

class SimplePie_File

{

	var $url;

	var $useragent;

	var $success = true;

	var $headers = array();

	var $body;

	var $status_code;

	var $redirects = 0;

	var $error;

	var $method = SIMPLEPIE_FILE_SOURCE_NONE;

	var $permanent_url;

	public function __construct($url, $timeout = 10, $redirects = 5, $headers = null, $useragent = null, $force_fsockopen = false, $curl_options = array())

	{

		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 = array();

			}

			if (!$force_fsockopen && function_exists('curl_exec'))

			{

				$this->method = SIMPLEPIE_FILE_SOURCE_REMOTE | SIMPLEPIE_FILE_SOURCE_CURL;

				$fp = curl_init();

				$headers2 = array();

				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, array(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_FILE_SOURCE_REMOTE | 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, array(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;

										}

										else if (($decompressed = gzuncompress($this->body)) !== false)

										{

											$this->body = $decompressed;

										}

										else if (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_FILE_SOURCE_LOCAL | 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;

			}

		}

	}

}