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feed-access.php
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<?php /** * Centralizes control over resource fetching. * * @since 4.7 */ class WPRSS_Feed_Access { const RESOURCE_CLASS = 'WPRSS_SimplePie_File'; const ITEM_CLASS = 'WPRSS_SimplePie_Item'; const D_REDIRECTS = 5; const SETTING_KEY_CERTIFICATE_PATH = 'certificate-path'; const SETTING_KEY_FEED_REQUEST_USERAGENT = 'feed_request_useragent'; const SETTING_KEY_CACHE = 'feed_cache_enabled'; protected static $_instance; protected $_certificate_file_path; /** * @since 4.7 * @return WPRSS_Feed_Access The singleton instance of this class. */ public static function instance() { if ( is_null( self::$_instance ) ) { $class_name = __CLASS__; self::$_instance = new $class_name; } return self::$_instance; } public function __construct() { $this->_construct(); } /** * The parameter-less constructor. * * @since 4.7 */ protected function _construct() { $wprss = wprss(); add_action( 'wprss_fetch_feed_before', array( $this, 'set_feed_options' ), 10, 2 ); add_action( 'wprss_settings_array', array( $this, 'add_settings' ) ); $wprss->on('fields', array($this, 'add_feed_source_fields')); } /** * Sets the path to the certificate, which will be used by WPRSS to fetch remote content. * * @since 4.7 * @param string $path Absolute path to the certificate file. * @return \WPRSS_Feed_Access This instance. */ public function set_certificate_file_path( $path ) { $this->_certificate_file_path = $path; return $this; } /** * Gets the path to the certificate, which will be used by WPRSS to fetch remote content. * * @since 4.7 * @see get_certificate_path_setting() * @return string Absolute path to the certificate file. By default will use the option. */ public function get_certificate_file_path() { if ( empty( $this->_certificate_file_path ) ) $this->_certificate_file_path = $this->get_certificate_path_setting(); return $this->_certificate_file_path; } /** * Gets the value of the option that stores the path to the certificate file. * Relative paths will be converted to absolute, as if relative to WP root. * * @since 4.7 * @return string Absolute path to the certificate file. */ public function get_certificate_path_setting() { $path = wprss_get_general_setting( self::SETTING_KEY_CERTIFICATE_PATH ); if ( empty( $path ) ) return $path; if ( !path_is_absolute( $path ) ) $path = ABSPATH . $path; return $path; } /** * Return the value of the useragent setting. * * The setting key is determined by the SETTING_KEY_FEED_REQUEST_USERAGENT class constant. * * @since 4.8.2 * @return string The value of the useragent setting. */ public function get_useragent_setting() { return wprss_get_general_setting( self::SETTING_KEY_FEED_REQUEST_USERAGENT, true ); } /** * Get the useragent string that will be sent with feed requests. * * @since 4.8.2 * * @param int|null $feedSourceId The ID of the feed source, which to get the useragent for. * Leave `null` to get a useragent independently from any feed source. * * @return string The useragent string that will be sent together with feed requests. * If empty, the value of SIMPLEPIE_USERAGENT will be used. */ public function get_useragent($feedSourceId = null) { $useragent = !is_null($feedSourceId) ? get_post_meta($feedSourceId, self::SETTING_KEY_FEED_REQUEST_USERAGENT, true) : $this->get_useragent_setting(); if (!strlen(trim($useragent))) { $useragent = $this->get_useragent_setting(); } $useragent = !strlen(trim($useragent)) ? $this->getDefaultUseragent() : $useragent; wprss()->event('feed_access_useragent', array( 'useragent' => &$useragent, 'feed_source_id' => $feedSourceId )); return $useragent; } /** * Retrieve the useragent string that will be used by default. * * @since 4.10 * * @return string The useragent string. */ public function getDefaultUseragent() { return SIMPLEPIE_USERAGENT; } /** * This happens immediately before feed initialization. * Handles the `wprss_fetch_feed_before` action. * * @since 4.7 * @param SimplePie $feed The instance of the object that represents the feed to be fetched. * @param int $feedSourceId ID of the feed source, which is accessing the feed. * Leave `null` to skip setting feed source specific options. * @param string $url The URL, from which the feed is going to be fetched. */ public function set_feed_options($feed, $feedSourceId = null) { $feed->set_item_class(static::ITEM_CLASS); $feed->set_file_class( static::RESOURCE_CLASS ); $feed->set_useragent($this->get_useragent($feedSourceId)); WPRSS_SimplePie_File::set_default_certificate_file_path($this->get_certificate_file_path()); /* * Setting the file resource object for the feed to use. * Note: this object will only be used if cache is disabled for * the feed. This is why running {@see SimplePie::set_file_class()} * is still necessary. Like this, the correct file class will * still be used, although the file object set below will * have absolutely no effect on the feed retrieval process. */ if (!$feed->file) { $feed->file = $this->create_resource_from_feed($feed); } } /** * Implements a `wprss_settings_array` filter. * * @since 4.7 * @param array $settings The current settings array, where 1st dimension is secion code, 2nd is setting code, 3rd is setting option(s). * @return array The new settings array. */ public function add_settings( $settings ) { $settings['advanced'][ self::SETTING_KEY_CERTIFICATE_PATH ] = array( 'label' => __( 'Certificate path', 'wprss' ), 'callback' => array( $this, 'render_certificate_path_setting' ) ); /* @since 4.8.2 */ $settings['advanced'][ self::SETTING_KEY_FEED_REQUEST_USERAGENT ] = array( 'label' => __( 'Feed request useragent', 'wprss' ), 'callback' => array( $this, 'render_feed_request_useragent_setting' ) ); /* @since 4.14.1 */ $settings['advanced'][ self::SETTING_KEY_CACHE ] = array( 'label' => __( 'Enable feed cache', 'wprss' ), 'callback' => array( $this, 'render_feed_cache_setting' ) ); return $settings; } /** * Adding feed source specific settings. * * @since 4.10 * * @param array $fields An array containing all existing fields by ID. */ public function add_feed_source_fields($fields) { $wprss = wprss(); $fields[self::SETTING_KEY_FEED_REQUEST_USERAGENT] = array( 'id' => self::SETTING_KEY_FEED_REQUEST_USERAGENT, 'label' => $wprss->__('Feed request useragent'), 'placeholder' => $wprss->__('Leave blank to inherit general setting') ); return $fields; } /** * Renders the setting field for the certificate path. * * @since 4.7 * @see wprss_admin_init * @param array $field Data of this field. */ public function render_certificate_path_setting( $field ) { $feed_limit = wprss_get_general_setting($field['field_id']); printf( '<input type="text" id="%1$s" name="wprss_settings_general[%1$s]" value="%2$s" />', esc_attr($field['field_id']), esc_attr($feed_limit) ); echo wprss_settings_inline_help($field['field_id'], $field['tooltip']); } /** * Renders the setting field for the feed request useragent. * * @since 4.8.2 * @see wprss_admin_init * @param array $field Data of this field. */ public function render_feed_request_useragent_setting( $field ) { $value = wprss_get_general_setting($field['field_id']); printf( '<input type="text" id="%1$s" name="wprss_settings_general[%1$s]" value="%2$s" placeholder="%3$s" />', esc_attr($field['field_id']), esc_attr($value), __('Default', 'wprss') ); echo wprss_settings_inline_help($field['field_id'], $field['tooltip']); } /** * Renders the setting field for the feed cache option. * * @since 4.15 * * @param array $field The information for this field. */ public function render_feed_cache_setting( $field ) { $value = (int) wprss_get_general_setting($field['field_id']); printf( '<input name="wprss_settings_general[%s]" type="hidden" value="0" />', esc_attr($field['field_id']) ); printf( '<input type="checkbox" value="1" id="%1$s" name="wprss_settings_general[%1$s]" %2$s />', esc_attr($field['field_id']), checked(1, $value, false) ); echo wprss_settings_inline_help($field['field_id'], $field['tooltip']); } /** * Retrieve default headers that should be used for feed requests. * * Use the `wprss_feed_default_headers` filter to amend the whole return value. * Use the `wprss_feed_default_headers_accept` to amend the types in the "Accept" header. * * @since 4.10 * @see array_merge_recursive_distinct() * @param array $additionalHeaders Optional headers to merge with the default ones. * Merging is done recursively. * @return array An array of headers, where keys are header names, and values are header values. */ public function default_headers(array $additionalHeaders = array()) { $defaultHeaders = array( 'Accept' => implode(', ', apply_filters('wprss_feed_default_headers_accept', array( 'application/atom+xml', 'application/rss+xmlm', 'application/rdf+xml;q=0.9', 'application/xml;q=0.8', 'text/xml;q=0.8', 'text/html;q=0.7', 'unknown/unknown;q=0.1', 'application/unknown;q=0.1', '*/*;q=0.1'))) ); $headers = array_merge_recursive_distinct($defaultHeaders, $additionalHeaders); $headers = apply_filters('wprss_feed_default_headers', $headers); return $headers; } /** * Creates a new object that is responsible for retrieving a remote resource. * * @since 4.10 * * @see SimplePie_File::__construct() * * @param string $url * @param int $timeout * @param int $redirects * @param array $headers If null, {@link default_headers() default headers} will be used. * @param string $useragent * @param bool $force_fsockopen * @return \SimplePie_File */ public function create_resource($url, $timeout = 10, $redirects = 5, $headers = null, $useragent = null, $force_fsockopen = false) { if (is_null($headers)) { $headers = $this->default_headers(); } if (!class_exists($resourceClass = static::RESOURCE_CLASS)) { throw new Exception(sprintf('Could not create resource: resource class "$1$s" does not exist', $resourceClass)); } return new $resourceClass($url, $timeout, $redirects, $headers, $useragent, $force_fsockopen); } /** * Creates a new object that is responsible for retrieving a remote resource, using values from a feed. * * @since 4.10 * * @see wprss_feed_create_resource() * * @param \SimplePie $feed The feed, based on which to create the resource. * @return \SimplePie_File */ public function create_resource_from_feed(SimplePie $feed) { return $this->create_resource($feed->feed_url, $feed->timeout, static::D_REDIRECTS, null, $feed->useragent, $feed->force_fsockopen); } } // Initialize add_action('wprss_init', function() { WPRSS_Feed_Access::instance(); }); class WPRSS_SimplePie_Item extends SimplePie_Item { public function sanitize($data, $type, $base = '') { if ($type & (SIMPLEPIE_CONSTRUCT_HTML | SIMPLEPIE_CONSTRUCT_XHTML | SIMPLEPIE_CONSTRUCT_MAYBE_HTML)) { return $data; } return parent::sanitize($data, $type, $base); } } /** * A padding layer used to give WPRSS more control over fetching of feed resources. * @since 4.7 */ class WPRSS_SimplePie_File extends SimplePie_File { protected static $_default_certificate_file_path; protected $_certificate_file_path; /** * Copied from {@see SimplePie_File#__construct()}. * Adds call to {@see _before_curl_exec()}. * * @since 4.7 */ public function __construct( $url, $timeout = 10, $redirects = 5, $headers = null, $useragent = null, $force_fsockopen = false ) { 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'], $parsed['fragment'] ); wprss_log_obj('Converted IDNA URL', $url, null, WPRSS_LOG_LEVEL_SYSTEM); } $this->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_TIMEOUT, $timeout ); curl_setopt( $fp, CURLOPT_CONNECTTIMEOUT, $timeout ); curl_setopt( $fp, CURLOPT_USERAGENT, $useragent ); curl_setopt( $fp, CURLOPT_HTTPHEADER, $headers2 ); if ( !ini_get( 'open_basedir' ) && !ini_get( 'safe_mode' ) && version_compare( SimplePie_Misc::get_curl_version(), '7.15.2', '>=' ) ) { curl_setopt( $fp, CURLOPT_FOLLOWLOCATION, 1 ); curl_setopt( $fp, CURLOPT_MAXREDIRS, $redirects ); } global $wpraNoSslVerification; if ($wpraNoSslVerification) { curl_setopt( $fp, CURLOPT_SSL_VERIFYPEER, 0 ); } $this->_before_curl_exec( $fp, $url ); $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 ); } if ( curl_errno( $fp ) ) { $this->error = 'cURL error ' . curl_errno( $fp ) . ': ' . curl_error( $fp ); $this->success = false; } else { $info = curl_getinfo( $fp ); curl_close( $fp ); $this->headers = explode( "\r\n\r\n", $this->headers, $info['redirect_count'] + 1 ); $this->headers = array_pop( $this->headers ); $parser = new SimplePie_HTTP_Parser( $this->headers ); if ( $parser->parse() ) { $this->headers = $parser->headers; $this->body = $this->_processBody($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 ); return $this->__construct( $location, $timeout, $redirects, $headers, $useragent, $force_fsockopen ); } $this->_afterCurlHeadersParsed($info); } } } 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 = $this->_processBody($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 ); return $this->__construct( $location, $timeout, $redirects, $headers, $useragent, $force_fsockopen ); } 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 = $this->_processBody($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; } $this->body = $this->_processBody($this->body); 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; $this->body = $this->_processBody(file_get_contents($url)); if ( !$this->body ) { $this->error = 'file_get_contents could not read the file'; $this->success = false; } } } /** * Processes the raw response body for an RSS feed. * * @since 4.17 * * @param string $body The raw HTTP response body string. * * @return string The processed response body string. */ protected function _processBody($body) { return trim($body); } /** * Additional preparation of the curl request. * Sets the {@link CURLOPT_CAINFO http://php.net/manual/en/function.curl-setopt.php} * cURL option to a value determined by {@see get_default_certificate_file_path}. * If the value is empty, leaves it as is. * * @since 4.7 * @param resource $fp Pointer to a resource created by {@see curl_init()}. * @param string $url The URL, to which the cURL request is being made. * @return \WPRSS_SimplePie_File This instance. */ protected function _before_curl_exec( $fp, $url ) { if ( ($ca_path = self::get_default_certificate_file_path()) && !empty( $ca_path ) ) { $this->_certificate_file_path = $ca_path; curl_setopt( $fp, CURLOPT_CAINFO, $this->_certificate_file_path ); } do_action( 'wprss_before_curl_exec', $fp ); return $this; } /** * Gets the path to the certificate, which will be used by this instance * to fetch remote content. * * @since 4.7 * @return string Path to the certificate file. */ public function get_certificate_file_path() { return $this->_certificate_file_path; } /** * Gets the path to the certificate file, which will be used by future * instances of this class. * * @since 4.7 * @return string Path to the certificate file. */ public static function get_default_certificate_file_path() { return self::$_default_certificate_file_path; } /** * Sets the path to the certificate file. * This path will be used by future instances of this class. * * @since 4.7 * @param string $path The path to the certificate file. */ public static function set_default_certificate_file_path( $path ) { self::$_default_certificate_file_path = $path; } /** * Called right after a cURL request returns, and headers are parsed. * * This method will not be called if a cURL error is encountered. * * @param $curlInfo Result of a call to {@see curl_getinfo()} on the cURL resource. * @since 4.8.2 */ protected function _afterCurlHeadersParsed($curlInfo) { $bodyMaxLength = 150; $code = $this->status_code; $body = $this->body; $bodyLength = strlen($body); $bodyOutput = strlen($body) < $bodyMaxLength ? $body : substr($body, 0, $bodyMaxLength); $outputLength = strlen($bodyOutput); $error = implode("\n", array( 'The resource could not be retrieved because of a %1$s error with code %2$d', 'Server returned %3$d characters' . ($outputLength < $bodyMaxLength ? '' : ', of which ' . $outputLength . ' are below') . ':', '%4$s' )); if ($code >= 400 && $code < 500 ) { // Client error $this->error = sprintf($error, 'client', $code, $bodyLength, $bodyOutput); $this->success = false; } if ($code >= 500 && $code < 600 ) { // Server error $this->error = sprintf($error, 'server', $code, $bodyLength, $bodyOutput); $this->success = false; } } }
/home/sudancam/public_html/../public_html/wp-content/plugins/wp-rss-aggregator/includes/./feed-access.php