1<?php
2/**
3 * SimplePie
4 *
5 * A PHP-Based RSS and Atom Feed Framework.
6 * Takes the hard work out of managing a complete RSS/Atom solution.
7 *
8 * Copyright (c) 2004-2016, Ryan Parman, Sam Sneddon, Ryan McCue, and contributors
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without modification, are
12 * permitted provided that the following conditions are met:
13 *
14 * 	* Redistributions of source code must retain the above copyright notice, this list of
15 * 	  conditions and the following disclaimer.
16 *
17 * 	* Redistributions in binary form must reproduce the above copyright notice, this list
18 * 	  of conditions and the following disclaimer in the documentation and/or other materials
19 * 	  provided with the distribution.
20 *
21 * 	* Neither the name of the SimplePie Team nor the names of its contributors may be used
22 * 	  to endorse or promote products derived from this software without specific prior
23 * 	  written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
26 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
27 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS
28 * AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
30 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
32 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
33 * POSSIBILITY OF SUCH DAMAGE.
34 *
35 * @package SimplePie
36 * @copyright 2004-2016 Ryan Parman, Sam Sneddon, Ryan McCue
37 * @author Ryan Parman
38 * @author Sam Sneddon
39 * @author Ryan McCue
40 * @link http://simplepie.org/ SimplePie
41 * @license http://www.opensource.org/licenses/bsd-license.php BSD License
42 */
43
44/**
45 * Used for fetching remote files and reading local files
46 *
47 * Supports HTTP 1.0 via cURL or fsockopen, with spotty HTTP 1.1 support
48 *
49 * This class can be overloaded with {@see SimplePie::set_file_class()}
50 *
51 * @package SimplePie
52 * @subpackage HTTP
53 * @todo Move to properly supporting RFC2616 (HTTP/1.1)
54 */
55class SimplePie_File
56{
57	var $url;
58	var $useragent;
59	var $success = true;
60	var $headers = array();
61	var $body;
62	var $status_code;
63	var $redirects = 0;
64	var $error;
65	var $method = SIMPLEPIE_FILE_SOURCE_NONE;
66	var $permanent_url;
67
68	public function __construct($url, $timeout = 10, $redirects = 5, $headers = null, $useragent = null, $force_fsockopen = false, $curl_options = array())
69	{
70		if (class_exists('idna_convert'))
71		{
72			$idn = new idna_convert();
73			$parsed = SimplePie_Misc::parse_url($url);
74			$url = SimplePie_Misc::compress_parse_url($parsed['scheme'], $idn->encode($parsed['authority']), $parsed['path'], $parsed['query'], NULL);
75		}
76		$this->url = $url;
77		$this->permanent_url = $url;
78		$this->useragent = $useragent;
79		if (preg_match('/^http(s)?:\/\//i', $url))
80		{
81			if ($useragent === null)
82			{
83				$useragent = ini_get('user_agent');
84				$this->useragent = $useragent;
85			}
86			if (!is_array($headers))
87			{
88				$headers = array();
89			}
90			if (!$force_fsockopen && function_exists('curl_exec'))
91			{
92				$this->method = SIMPLEPIE_FILE_SOURCE_REMOTE | SIMPLEPIE_FILE_SOURCE_CURL;
93				$fp = curl_init();
94				$headers2 = array();
95				foreach ($headers as $key => $value)
96				{
97					$headers2[] = "$key: $value";
98				}
99				if (version_compare(SimplePie_Misc::get_curl_version(), '7.10.5', '>='))
100				{
101					curl_setopt($fp, CURLOPT_ENCODING, '');
102				}
103				curl_setopt($fp, CURLOPT_URL, $url);
104				curl_setopt($fp, CURLOPT_HEADER, 1);
105				curl_setopt($fp, CURLOPT_RETURNTRANSFER, 1);
106				curl_setopt($fp, CURLOPT_FAILONERROR, 1);
107				curl_setopt($fp, CURLOPT_TIMEOUT, $timeout);
108				curl_setopt($fp, CURLOPT_CONNECTTIMEOUT, $timeout);
109				curl_setopt($fp, CURLOPT_REFERER, $url);
110				curl_setopt($fp, CURLOPT_USERAGENT, $useragent);
111				curl_setopt($fp, CURLOPT_HTTPHEADER, $headers2);
112				foreach ($curl_options as $curl_param => $curl_value) {
113					curl_setopt($fp, $curl_param, $curl_value);
114				}
115
116				$this->headers = curl_exec($fp);
117				if (curl_errno($fp) === 23 || curl_errno($fp) === 61)
118				{
119					curl_setopt($fp, CURLOPT_ENCODING, 'none');
120					$this->headers = curl_exec($fp);
121				}
122				if (curl_errno($fp))
123				{
124					$this->error = 'cURL error ' . curl_errno($fp) . ': ' . curl_error($fp);
125					$this->success = false;
126				}
127				else
128				{
129					// Use the updated url provided by curl_getinfo after any redirects.
130					if ($info = curl_getinfo($fp)) {
131						$this->url = $info['url'];
132					}
133					curl_close($fp);
134					$this->headers = SimplePie_HTTP_Parser::prepareHeaders($this->headers, $info['redirect_count'] + 1);
135					$parser = new SimplePie_HTTP_Parser($this->headers);
136					if ($parser->parse())
137					{
138						$this->headers = $parser->headers;
139						$this->body = trim($parser->body);
140						$this->status_code = $parser->status_code;
141						if ((in_array($this->status_code, array(300, 301, 302, 303, 307)) || $this->status_code > 307 && $this->status_code < 400) && isset($this->headers['location']) && $this->redirects < $redirects)
142						{
143							$this->redirects++;
144							$location = SimplePie_Misc::absolutize_url($this->headers['location'], $url);
145							$previousStatusCode = $this->status_code;
146							$this->__construct($location, $timeout, $redirects, $headers, $useragent, $force_fsockopen, $curl_options);
147							$this->permanent_url = ($previousStatusCode == 301) ? $location : $url;
148							return;
149						}
150					}
151				}
152			}
153			else
154			{
155				$this->method = SIMPLEPIE_FILE_SOURCE_REMOTE | SIMPLEPIE_FILE_SOURCE_FSOCKOPEN;
156				$url_parts = parse_url($url);
157				$socket_host = $url_parts['host'];
158				if (isset($url_parts['scheme']) && strtolower($url_parts['scheme']) === 'https')
159				{
160					$socket_host = "ssl://$url_parts[host]";
161					$url_parts['port'] = 443;
162				}
163				if (!isset($url_parts['port']))
164				{
165					$url_parts['port'] = 80;
166				}
167				$fp = @fsockopen($socket_host, $url_parts['port'], $errno, $errstr, $timeout);
168				if (!$fp)
169				{
170					$this->error = 'fsockopen error: ' . $errstr;
171					$this->success = false;
172				}
173				else
174				{
175					stream_set_timeout($fp, $timeout);
176					if (isset($url_parts['path']))
177					{
178						if (isset($url_parts['query']))
179						{
180							$get = "$url_parts[path]?$url_parts[query]";
181						}
182						else
183						{
184							$get = $url_parts['path'];
185						}
186					}
187					else
188					{
189						$get = '/';
190					}
191					$out = "GET $get HTTP/1.1\r\n";
192					$out .= "Host: $url_parts[host]\r\n";
193					$out .= "User-Agent: $useragent\r\n";
194					if (extension_loaded('zlib'))
195					{
196						$out .= "Accept-Encoding: x-gzip,gzip,deflate\r\n";
197					}
198
199					if (isset($url_parts['user']) && isset($url_parts['pass']))
200					{
201						$out .= "Authorization: Basic " . base64_encode("$url_parts[user]:$url_parts[pass]") . "\r\n";
202					}
203					foreach ($headers as $key => $value)
204					{
205						$out .= "$key: $value\r\n";
206					}
207					$out .= "Connection: Close\r\n\r\n";
208					fwrite($fp, $out);
209
210					$info = stream_get_meta_data($fp);
211
212					$this->headers = '';
213					while (!$info['eof'] && !$info['timed_out'])
214					{
215						$this->headers .= fread($fp, 1160);
216						$info = stream_get_meta_data($fp);
217					}
218					if (!$info['timed_out'])
219					{
220						$parser = new SimplePie_HTTP_Parser($this->headers);
221						if ($parser->parse())
222						{
223							$this->headers = $parser->headers;
224							$this->body = $parser->body;
225							$this->status_code = $parser->status_code;
226							if ((in_array($this->status_code, array(300, 301, 302, 303, 307)) || $this->status_code > 307 && $this->status_code < 400) && isset($this->headers['location']) && $this->redirects < $redirects)
227							{
228								$this->redirects++;
229								$location = SimplePie_Misc::absolutize_url($this->headers['location'], $url);
230								$previousStatusCode = $this->status_code;
231								$this->__construct($location, $timeout, $redirects, $headers, $useragent, $force_fsockopen, $curl_options);
232								$this->permanent_url = ($previousStatusCode == 301) ? $location : $url;
233								return;
234							}
235							if (isset($this->headers['content-encoding']))
236							{
237								// Hey, we act dumb elsewhere, so let's do that here too
238								switch (strtolower(trim($this->headers['content-encoding'], "\x09\x0A\x0D\x20")))
239								{
240									case 'gzip':
241									case 'x-gzip':
242										$decoder = new SimplePie_gzdecode($this->body);
243										if (!$decoder->parse())
244										{
245											$this->error = 'Unable to decode HTTP "gzip" stream';
246											$this->success = false;
247										}
248										else
249										{
250											$this->body = trim($decoder->data);
251										}
252										break;
253
254									case 'deflate':
255										if (($decompressed = gzinflate($this->body)) !== false)
256										{
257											$this->body = $decompressed;
258										}
259										else if (($decompressed = gzuncompress($this->body)) !== false)
260										{
261											$this->body = $decompressed;
262										}
263										else if (function_exists('gzdecode') && ($decompressed = gzdecode($this->body)) !== false)
264										{
265											$this->body = $decompressed;
266										}
267										else
268										{
269											$this->error = 'Unable to decode HTTP "deflate" stream';
270											$this->success = false;
271										}
272										break;
273
274									default:
275										$this->error = 'Unknown content coding';
276										$this->success = false;
277								}
278							}
279						}
280					}
281					else
282					{
283						$this->error = 'fsocket timed out';
284						$this->success = false;
285					}
286					fclose($fp);
287				}
288			}
289		}
290		else
291		{
292			$this->method = SIMPLEPIE_FILE_SOURCE_LOCAL | SIMPLEPIE_FILE_SOURCE_FILE_GET_CONTENTS;
293			if (empty($url) || !($this->body = trim(file_get_contents($url))))
294			{
295				$this->error = 'file_get_contents could not read the file';
296				$this->success = false;
297			}
298		}
299	}
300}
301