public function init()
{
// Check absolute bare minimum requirements.
if (function_exists('version_compare') && version_compare(PHP_VERSION, '5.0', '<') || !extension_loaded('xml') || !extension_loaded('pcre')) {
return false;
} elseif (!extension_loaded('xmlreader')) {
static $xml_is_sane = null;
if ($xml_is_sane === null) {
$parser_check = xml_parser_create();
xml_parse_into_struct($parser_check, '<foo>&</foo>', $values);
xml_parser_free($parser_check);
$xml_is_sane = isset($values[0]['value']);
}
if (!$xml_is_sane) {
return false;
}
}
// Pass whatever was set with config options over to the sanitizer.
$this->sanitize->pass_cache_data($this->cache, $this->cache_location, $this->cache_name_function, $this->cache_class);
$this->sanitize->pass_file_data($this->file_class, $this->timeout, $this->useragent, $this->force_fsockopen);
if ($this->feed_url !== null || $this->raw_data !== null) {
$this->error = null;
$this->data = array();
$this->multifeed_objects = array();
$cache = false;
if ($this->feed_url !== null) {
$parsed_feed_url = SimplePie_Misc::parse_url($this->feed_url);
// Decide whether to enable caching
if ($this->cache && $parsed_feed_url['scheme'] !== '') {
$cache = call_user_func(array($this->cache_class, 'create'), $this->cache_location, call_user_func($this->cache_name_function, $this->feed_url), 'spc');
}
// If it's enabled and we don't want an XML dump, use the cache
if ($cache && !$this->xml_dump) {
// Load the Cache
$this->data = $cache->load();
if (!empty($this->data)) {
// If the cache is for an outdated build of SimplePie
if (!isset($this->data['build']) || $this->data['build'] !== SIMPLEPIE_BUILD) {
$cache->unlink();
$this->data = array();
} elseif (isset($this->data['url']) && $this->data['url'] !== $this->feed_url) {
$cache = false;
$this->data = array();
} elseif (isset($this->data['feed_url'])) {
// If the autodiscovery cache is still valid use it.
if ($cache->mtime() + $this->autodiscovery_cache_duration > time()) {
// Do not need to do feed autodiscovery yet.
if ($this->data['feed_url'] === $this->data['url']) {
$cache->unlink();
$this->data = array();
} else {
$this->set_feed_url($this->data['feed_url']);
return $this->init();
}
}
} elseif ($cache->mtime() + $this->cache_duration < time()) {
// If we have last-modified and/or etag set
if (isset($this->data['headers']['last-modified']) || isset($this->data['headers']['etag'])) {
$headers = array('Accept' => 'application/atom+xml, application/rss+xml, application/rdf+xml;q=0.9, application/xml;q=0.8, text/xml;q=0.8, text/html;q=0.7, unknown/unknown;q=0.1, application/unknown;q=0.1, */*;q=0.1');
if (isset($this->data['headers']['last-modified'])) {
$headers['if-modified-since'] = $this->data['headers']['last-modified'];
}
if (isset($this->data['headers']['etag'])) {
$headers['if-none-match'] = $this->data['headers']['etag'];
}
$file = new $this->file_class($this->feed_url, $this->timeout / 10, 5, $headers, $this->useragent, $this->force_fsockopen);
if ($file->success) {
if ($file->status_code === 304) {
$cache->touch();
return true;
} else {
$headers = $file->headers;
}
} else {
unset($file);
}
}
} else {
return true;
}
} else {
$cache->unlink();
$this->data = array();
}
}
// If we don't already have the file (it'll only exist if we've opened it to check if the cache has been modified), open it.
if (!isset($file)) {
if (is_a($this->file, 'SimplePie_File') && $this->file->url === $this->feed_url) {
$file =& $this->file;
} else {
$headers = array('Accept' => 'application/atom+xml, application/rss+xml, 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');
$file = new $this->file_class($this->feed_url, $this->timeout, 5, $headers, $this->useragent, $this->force_fsockopen);
}
}
// If the file connection has an error, set SimplePie::error to that and quit
if (!$file->success && !($file->method & SIMPLEPIE_FILE_SOURCE_REMOTE === 0 || ($file->status_code === 200 || $file->status_code > 206 && $file->status_code < 300))) {
$this->error = $file->error;
if (!empty($this->data)) {
return true;
} else {
return false;
}
}
if (!$this->force_feed) {
// Check if the supplied URL is a feed, if it isn't, look for it.
$locate = new $this->locator_class($file, $this->timeout, $this->useragent, $this->file_class, $this->max_checked_feeds, $this->content_type_sniffer_class);
if (!$locate->is_feed($file)) {
// We need to unset this so that if SimplePie::set_file() has been called that object is untouched
unset($file);
if ($file = $locate->find($this->autodiscovery, $this->all_discovered_feeds)) {
if ($cache) {
$this->data = array('url' => $this->feed_url, 'feed_url' => $file->url, 'build' => SIMPLEPIE_BUILD);
if (!$cache->save($this)) {
trigger_error("{$this->cache_location} is not writeable. Make sure you've set the correct relative or absolute path, and that the location is server-writable.", E_USER_WARNING);
}
$cache = call_user_func(array($this->cache_class, 'create'), $this->cache_location, call_user_func($this->cache_name_function, $file->url), 'spc');
}
$this->feed_url = $file->url;
} else {
$this->error = "A feed could not be found at {$this->feed_url}. A feed with an invalid mime type may fall victim to this error, or " . SIMPLEPIE_NAME . " was unable to auto-discover it.. Use force_feed() if you are certain this URL is a real feed.";
SimplePie_Misc::error($this->error, E_USER_NOTICE, __FILE__, __LINE__);
return false;
}
}
$locate = null;
}
$headers = $file->headers;
$data = $file->body;
$sniffer = new $this->content_type_sniffer_class($file);
$sniffed = $sniffer->get_type();
} else {
$data = $this->raw_data;
}
// Set up array of possible encodings
$encodings = array();
// First check to see if input has been overridden.
if ($this->input_encoding !== false) {
$encodings[] = $this->input_encoding;
}
$application_types = array('application/xml', 'application/xml-dtd', 'application/xml-external-parsed-entity');
$text_types = array('text/xml', 'text/xml-external-parsed-entity');
// RFC 3023 (only applies to sniffed content)
if (isset($sniffed)) {
if (in_array($sniffed, $application_types) || substr($sniffed, 0, 12) === 'application/' && substr($sniffed, -4) === '+xml') {
if (isset($headers['content-type']) && preg_match('/;\\x20?charset=([^;]*)/i', $headers['content-type'], $charset)) {
$encodings[] = strtoupper($charset[1]);
}
$encodings = array_merge($encodings, SimplePie_Misc::xml_encoding($data));
$encodings[] = 'UTF-8';
} elseif (in_array($sniffed, $text_types) || substr($sniffed, 0, 5) === 'text/' && substr($sniffed, -4) === '+xml') {
if (isset($headers['content-type']) && preg_match('/;\\x20?charset=([^;]*)/i', $headers['content-type'], $charset)) {
$encodings[] = $charset[1];
}
$encodings[] = 'US-ASCII';
} elseif (substr($sniffed, 0, 5) === 'text/') {
$encodings[] = 'US-ASCII';
}
}
// Fallback to XML 1.0 Appendix F.1/UTF-8/ISO-8859-1
$encodings = array_merge($encodings, SimplePie_Misc::xml_encoding($data));
$encodings[] = 'UTF-8';
$encodings[] = 'ISO-8859-1';
// There's no point in trying an encoding twice
$encodings = array_unique($encodings);
// If we want the XML, just output that with the most likely encoding and quit
if ($this->xml_dump) {
header('Content-type: text/xml; charset=' . $encodings[0]);
echo $data;
exit;
}
// Loop through each possible encoding, till we return something, or run out of possibilities
foreach ($encodings as $encoding) {
// Change the encoding to UTF-8 (as we always use UTF-8 internally)
if ($utf8_data = SimplePie_Misc::change_encoding($data, $encoding, 'UTF-8')) {
// Create new parser
$parser = new $this->parser_class();
// If it's parsed fine
if ($parser->parse($utf8_data, 'UTF-8')) {
$this->data = $parser->get_data();
if ($this->get_type() & ~SIMPLEPIE_TYPE_NONE) {
if (isset($headers)) {
$this->data['headers'] = $headers;
}
$this->data['build'] = SIMPLEPIE_BUILD;
// Cache the file if caching is enabled
if ($cache && !$cache->save($this)) {
trigger_error("{$this->cache_location} is not writeable. Make sure you've set the correct relative or absolute path, and that the location is server-writable.", E_USER_WARNING);
}
return true;
} else {
$this->error = "A feed could not be found at {$this->feed_url}. This does not appear to be a valid RSS or Atom feed.";
SimplePie_Misc::error($this->error, E_USER_NOTICE, __FILE__, __LINE__);
return false;
}
}
}
}
if (isset($parser)) {
// We have an error, just set SimplePie_Misc::error to it and quit
$this->error = sprintf('This XML document is invalid, likely due to invalid characters. XML error: %s at line %d, column %d', $parser->get_error_string(), $parser->get_current_line(), $parser->get_current_column());
} else {
$this->error = 'The data could not be converted to UTF-8. You MUST have either the iconv or mbstring extension installed. Upgrading to PHP 5.x (which includes iconv) is highly recommended.';
}
SimplePie_Misc::error($this->error, E_USER_NOTICE, __FILE__, __LINE__);
return false;
} elseif (!empty($this->multifeed_url)) {
$i = 0;
$success = 0;
$this->multifeed_objects = array();
foreach ($this->multifeed_url as $url) {
$this->multifeed_objects[$i] = clone $this;
$this->multifeed_objects[$i]->set_feed_url($url);
$success |= $this->multifeed_objects[$i]->init();
$i++;
}
return (bool) $success;
} else {
return false;
}
}
