/**
* Parse the OPML file
*
* @access public
* @return array|false
*/
public function execute()
{
Logging::setMessage(get_called_class() . ': start importation');
$xml = XmlParser::getSimpleXml(trim($this->content));
if ($xml === false || $xml->getName() !== 'opml' || !isset($xml->body)) {
Logging::setMessage(get_called_class() . ': OPML tag not found or malformed XML document');
return false;
}
$this->parseEntries($xml->body);
Logging::setMessage(get_called_class() . ': ' . count($this->items) . ' subscriptions found');
return $this->items;
}
/**
* Do the HTTP request
*
* @access public
* @return array HTTP response ['body' => ..., 'status' => ..., 'headers' => ...]
*/
public function doRequest()
{
// Prepare HTTP headers for the request
$headers = array('Connection: close', 'User-Agent: ' . $this->user_agent);
if (function_exists('gzdecode')) {
$headers[] = 'Accept-Encoding: gzip';
}
if ($this->etag) {
$headers[] = 'If-None-Match: ' . $this->etag;
}
if ($this->last_modified) {
$headers[] = 'If-Modified-Since: ' . $this->last_modified;
}
// Create context
$context_options = array('http' => array('method' => 'GET', 'protocol_version' => 1.1, 'timeout' => $this->timeout, 'max_redirects' => $this->max_redirects, 'header' => implode("\r\n", $headers)));
if ($this->proxy_hostname) {
Logging::setMessage(get_called_class() . ' Proxy: ' . $this->proxy_hostname . ':' . $this->proxy_port);
$context_options['http']['proxy'] = 'tcp://' . $this->proxy_hostname . ':' . $this->proxy_port;
$context_options['http']['request_fulluri'] = true;
if ($this->proxy_username) {
Logging::setMessage(get_called_class() . ' Proxy credentials: Yes');
$headers[] = 'Proxy-Authorization: Basic ' . base64_encode($this->proxy_username . ':' . $this->proxy_password);
$context_options['http']['header'] = implode("\r\n", $headers);
} else {
Logging::setMessage(get_called_class() . ' Proxy credentials: No');
}
}
$context = stream_context_create($context_options);
// Make HTTP request
$stream = @fopen($this->url, 'r', false, $context);
if (!is_resource($stream)) {
return false;
}
// Get the entire body until the max size
$body = stream_get_contents($stream, $this->max_body_size + 1);
// If the body size is too large abort everything
if (strlen($body) > $this->max_body_size) {
return false;
}
// Get HTTP headers response
$metadata = stream_get_meta_data($stream);
list($status, $headers) = $this->parseHeaders($metadata['wrapper_data']);
fclose($stream);
if (isset($headers['Transfer-Encoding']) && $headers['Transfer-Encoding'] === 'chunked') {
$body = $this->decodeChunked($body);
}
if (isset($headers['Content-Encoding']) && $headers['Content-Encoding'] === 'gzip') {
$body = @gzdecode($body);
}
return array('status' => $status, 'body' => $body, 'headers' => $headers);
}
/**
* Do the HTTP request
*
* @access public
* @param bool $follow_location Flag used when there is an open_basedir restriction
* @return array HTTP response ['body' => ..., 'status' => ..., 'headers' => ...]
*/
public function doRequest($follow_location = true)
{
$request_headers = array('Connection: close');
if ($this->etag) {
$request_headers[] = 'If-None-Match: ' . $this->etag;
}
if ($this->last_modified) {
$request_headers[] = 'If-Modified-Since: ' . $this->last_modified;
}
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $this->url);
curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $this->timeout);
curl_setopt($ch, CURLOPT_TIMEOUT, $this->timeout);
curl_setopt($ch, CURLOPT_USERAGENT, $this->user_agent);
curl_setopt($ch, CURLOPT_HTTPHEADER, $request_headers);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, ini_get('open_basedir') === '');
curl_setopt($ch, CURLOPT_MAXREDIRS, $this->max_redirects);
curl_setopt($ch, CURLOPT_ENCODING, '');
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
// For auto-signed certificates...
curl_setopt($ch, CURLOPT_WRITEFUNCTION, array($this, 'readBody'));
curl_setopt($ch, CURLOPT_HEADERFUNCTION, array($this, 'readHeaders'));
curl_setopt($ch, CURLOPT_COOKIEJAR, 'php://memory');
curl_setopt($ch, CURLOPT_COOKIEFILE, 'php://memory');
if ($this->proxy_hostname) {
Logging::setMessage(get_called_class() . ' Proxy: ' . $this->proxy_hostname . ':' . $this->proxy_port);
curl_setopt($ch, CURLOPT_PROXYPORT, $this->proxy_port);
curl_setopt($ch, CURLOPT_PROXYTYPE, 'HTTP');
curl_setopt($ch, CURLOPT_PROXY, $this->proxy_hostname);
if ($this->proxy_username) {
Logging::setMessage(get_called_class() . ' Proxy credentials: Yes');
curl_setopt($ch, CURLOPT_PROXYUSERPWD, $this->proxy_username . ':' . $this->proxy_password);
} else {
Logging::setMessage(get_called_class() . ' Proxy credentials: No');
}
}
curl_exec($ch);
Logging::setMessage(get_called_class() . ' cURL total time: ' . curl_getinfo($ch, CURLINFO_TOTAL_TIME));
Logging::setMessage(get_called_class() . ' cURL dns lookup time: ' . curl_getinfo($ch, CURLINFO_NAMELOOKUP_TIME));
Logging::setMessage(get_called_class() . ' cURL connect time: ' . curl_getinfo($ch, CURLINFO_CONNECT_TIME));
Logging::setMessage(get_called_class() . ' cURL speed download: ' . curl_getinfo($ch, CURLINFO_SPEED_DOWNLOAD));
Logging::setMessage(get_called_class() . ' cURL effective url: ' . curl_getinfo($ch, CURLINFO_EFFECTIVE_URL));
if (curl_errno($ch)) {
Logging::setMessage(get_called_class() . ' cURL error: ' . curl_error($ch));
curl_close($ch);
return false;
}
curl_close($ch);
list($status, $headers) = $this->parseHeaders(explode("\r\n", $this->headers[$this->headers_counter - 1]));
if ($follow_location && ini_get('open_basedir') !== '' && ($status == 301 || $status == 302)) {
$nb_redirects = 0;
$this->url = $headers['Location'];
$this->body = '';
$this->body_length = 0;
$this->headers = array();
$this->headers_counter = 0;
while (true) {
$nb_redirects++;
if ($nb_redirects >= $this->max_redirects) {
return false;
}
$result = $this->doRequest(false);
if ($result['status'] == 301 || $result['status'] == 302) {
$this->url = $result['headers']['Location'];
$this->body = '';
$this->body_length = 0;
$this->headers = array();
$this->headers_counter = 0;
} else {
return $result;
}
}
}
return array('status' => $status, 'body' => $this->body, 'headers' => $headers);
}
/**
* Parse HTTP headers
*
* @access public
* @param array $lines List of headers
* @return array
*/
public function parseHeaders(array $lines)
{
$status = 200;
$headers = array();
foreach ($lines as $line) {
if (strpos($line, 'HTTP') === 0) {
$status = (int) substr($line, 9, 3);
} else {
if (strpos($line, ':') !== false) {
@(list($name, $value) = explode(': ', $line));
if ($value) {
$headers[trim($name)] = trim($value);
}
}
}
}
Logging::setMessage(get_called_class() . ' HTTP status code: ' . $status);
foreach ($headers as $name => $value) {
Logging::setMessage(get_called_class() . ' HTTP header: ' . $name . ' => ' . $value);
}
return array($status, $headers);
}
protected function writeErrors(OutputInterface $output)
{
foreach (Logging::getMessages() as $message) {
$output->writeln('<error>' . $message . '</error>');
}
}
/**
* Strip useless tags
*
* @access public
*/
public function stripGarbage()
{
$dom = XmlParser::getDomDocument($this->content);
if ($dom !== false) {
$xpath = new DOMXPath($dom);
foreach ($this->stripTags as $tag) {
$nodes = $xpath->query('//' . $tag);
if ($nodes !== false && $nodes->length > 0) {
Logging::setMessage(get_called_class() . ' Strip tag: "' . $tag . '"');
foreach ($nodes as $node) {
$node->parentNode->removeChild($node);
}
}
}
foreach ($this->stripAttributes as $attribute) {
$nodes = $xpath->query('//*[contains(@class, "' . $attribute . '") or contains(@id, "' . $attribute . '")]');
if ($nodes !== false && $nodes->length > 0) {
Logging::setMessage(get_called_class() . ' Strip attribute: "' . $attribute . '"');
foreach ($nodes as $node) {
$node->parentNode->removeChild($node);
}
}
}
$this->content = $dom->saveXML($dom->documentElement);
}
}
/**
* Discover the feed url inside a HTML document and download the feed
*
* @access public
* @return boolean
*/
public function discover()
{
if (!$this->content) {
return false;
}
Logging::setMessage(get_called_class() . ': Try to discover a subscription');
$dom = XmlParser::getHtmlDocument($this->content);
$xpath = new DOMXPath($dom);
$queries = array('//link[@type="application/rss+xml"]', '//link[@type="application/atom+xml"]');
foreach ($queries as $query) {
$nodes = $xpath->query($query);
if ($nodes->length !== 0) {
$link = $nodes->item(0)->getAttribute('href');
if (!empty($link)) {
// Relative links
if (strpos($link, 'http') !== 0) {
if ($link[0] === '/') {
$link = substr($link, 1);
}
if ($this->url[strlen($this->url) - 1] !== '/') {
$this->url .= '/';
}
$link = $this->url . $link;
}
Logging::setMessage(get_called_class() . ': Find subscription link: ' . $link);
$this->download($link);
return true;
}
}
}
return false;
}
