X-Git-Url: https://git.ao2.it/tweeper.git/blobdiff_plain/c133c5d67b7d4130b8ec5aec3b972a865d4705ff..21601a9299810f223341ff4bed4f9649f5ea0359:/tweeper.php?ds=sidebyside diff --git a/tweeper.php b/tweeper.php index 7630e0a..87efd60 100644 --- a/tweeper.php +++ b/tweeper.php @@ -44,30 +44,39 @@ class Tweeper { /** * Convert numeric Epoch to the date format expected in a RSS document. */ - public static function epoch_to_gmdate($timestamp) { + public static function epochToRssDate($timestamp) { if (!is_numeric($timestamp) || is_nan($timestamp)) { $timestamp = 0; } - return gmdate('D, d M Y H:i:s', $timestamp) . ' GMT'; + return gmdate(DATE_RSS, $timestamp); } /** * Convert generic date string to the date format expected in a RSS document. */ - public static function str_to_gmdate($date) { + public static function strToRssDate($date) { $timestamp = strtotime($date); if (FALSE === $timestamp) { $timestamp = 0; } - return Tweeper::epoch_to_gmdate($timestamp); + return Tweeper::epochToRssDate($timestamp); + } + + /** + * Convert string to UpperCamelCase. + */ + public static function toUpperCamelCase($str, $delim = ' ') { + $str_upper = ucwords($str, $delim); + $str_camel_case = str_replace($delim, '', $str_upper); + return $str_camel_case; } /** * Get the contents from a URL. */ - private static function getContents($url) { + private static function getUrlContents($url) { $ch = curl_init($url); curl_setopt_array($ch, array( CURLOPT_HEADER => FALSE, @@ -80,6 +89,9 @@ class Tweeper { CURLOPT_USERAGENT => Tweeper::$userAgent, )); $contents = curl_exec($ch); + if (FALSE === $contents) { + trigger_error(curl_error($ch)); + } curl_close($ch); return $contents; @@ -88,7 +100,7 @@ class Tweeper { /** * Get the headers from a URL. */ - private static function getInfo($url) { + private static function getUrlInfo($url) { $ch = curl_init($url); curl_setopt_array($ch, array( CURLOPT_HEADER => TRUE, @@ -102,6 +114,9 @@ class Tweeper { )); curl_exec($ch); $url_info = curl_getinfo($ch); + if (FALSE === $url_info) { + trigger_error(curl_error($ch)); + } curl_close($ch); return $url_info; @@ -112,7 +127,9 @@ class Tweeper { */ public static function generateEnclosure($url) { $supported_content_types = array( + "application/octet-stream", "application/ogg", + "application/pdf", "audio/aac", "audio/mp4", "audio/mpeg", @@ -123,17 +140,14 @@ class Tweeper { "audio/x-midi", "image/gif", "image/jpeg", + "image/png", "video/avi", "video/mp4", "video/mpeg", "video/ogg", ); - // The RSS specification says that the enclosure element URL must be http. - // See http://sourceforge.net/p/feedvalidator/bugs/72/ - $http_url = preg_replace("/^https/", "http", $url); - - $url_info = Tweeper::getInfo($http_url); + $url_info = Tweeper::getUrlInfo($url); $supported = in_array($url_info['content_type'], $supported_content_types); if (!$supported) { @@ -141,21 +155,23 @@ class Tweeper { return ''; } - $dom = new DomDocument(); + // The RSS specification says that the enclosure element URL must be http. + // See http://sourceforge.net/p/feedvalidator/bugs/72/ + $http_url = preg_replace("/^https/", "http", $url_info['url']); + + $dom = new DOMDocument(); $enc = $dom->createElement('enclosure'); - $enc->setAttribute('url', $url_info['url']); + $enc->setAttribute('url', $http_url); $enc->setAttribute('length', $url_info['download_content_length']); $enc->setAttribute('type', $url_info['content_type']); - $dom->appendChild($enc); - - return $dom->saveXML($enc); + return $enc; } /** * Mimic the message from libxml.c::php_libxml_ctx_error_level() */ - private function logXmlError($error) { + private static function logXmlError($error) { $output = ""; switch ($error->level) { @@ -187,32 +203,9 @@ class Tweeper { } /** - * Load a stylesheet if the web site is supported. - */ - private function loadStylesheet($host) { - $stylesheet = "file://" . __DIR__ . "/rss_converter_" . $host . ".xsl"; - if (FALSE === file_exists($stylesheet)) { - trigger_error("Conversion to RSS not supported for $host ($stylesheet not found)", E_USER_ERROR); - return NULL; - } - - $stylesheet_contents = $this->getContents($stylesheet); - - $xslDoc = new DOMDocument(); - $xslDoc->loadXML($stylesheet_contents); - - $xsltProcessor = new XSLTProcessor(); - $xsltProcessor->registerPHPFunctions(); - $xsltProcessor->setParameter('', 'generate-enclosure', $this->generate_enclosure); - $xsltProcessor->importStylesheet($xslDoc); - - return $xsltProcessor; - } - - /** - * Convert json to xml. + * Convert json to XML. */ - private function jsonToXml($json, $root_node_name) { + private static function jsonToXml($json, $root_node_name) { // Apparently the ObjectNormalizer used afterwards is not able to handle // the stdClass object created by json_decode() with the default setting // $assoc = false; so use $assoc = true. @@ -243,7 +236,7 @@ class Tweeper { /** * Convert the Instagram content to XML. */ - private function get_xml_instagram_com($html) { + private function getXmlInstagramCom($html) { // Extract the json data from the html code. $json_match_expr = '/window._sharedData = (.*);/'; $ret = preg_match($json_match_expr, $html, $matches); @@ -252,13 +245,13 @@ class Tweeper { return NULL; } - return $this->jsonToXml($matches[1], 'instagram'); + return Tweeper::jsonToXml($matches[1], 'instagram'); } /** * Make the Facebook HTML processable. */ - private function preprocess_html_facebook_com($html) { + private function preprocessHtmlFacebookCom($html) { $html = str_replace('<!--', '', $html); $html = str_replace('-->', '', $html); return $html; @@ -273,8 +266,8 @@ class Tweeper { // Handle warnings and errors when loading invalid HTML. $xml_errors_value = libxml_use_internal_errors(TRUE); - // If there is a host-specific method to get the xml data, use it! - $get_xml_host_method = 'get_xml_' . str_replace(".", "_", $host); + // If there is a host-specific method to get the XML data, use it! + $get_xml_host_method = 'getXml' . Tweeper::toUpperCamelCase($host, '.'); if (method_exists($this, $get_xml_host_method)) { $xml_data = call_user_func_array(array($this, $get_xml_host_method), array($html)); $xmlDoc->loadXML($xml_data); @@ -284,7 +277,7 @@ class Tweeper { } foreach (libxml_get_errors() as $xml_error) { - $this->logXmlError($xml_error); + Tweeper::logXmlError($xml_error); } libxml_clear_errors(); libxml_use_internal_errors($xml_errors_value); @@ -293,6 +286,29 @@ class Tweeper { } /** + * Load a stylesheet if the web site is supported. + */ + private function loadStylesheet($host) { + $stylesheet = "file://" . __DIR__ . "/rss_converter_" . $host . ".xsl"; + if (FALSE === file_exists($stylesheet)) { + trigger_error("Conversion to RSS not supported for $host ($stylesheet not found)", E_USER_ERROR); + return NULL; + } + + $stylesheet_contents = Tweeper::getUrlContents($stylesheet); + + $xslDoc = new DOMDocument(); + $xslDoc->loadXML($stylesheet_contents); + + $xsltProcessor = new XSLTProcessor(); + $xsltProcessor->registerPHPFunctions(); + $xsltProcessor->setParameter('', 'generate-enclosure', $this->generate_enclosure); + $xsltProcessor->importStylesheet($xslDoc); + + return $xsltProcessor; + } + + /** * Convert the site content to RSS. */ public function tweep($src_url) { @@ -302,6 +318,12 @@ class Tweeper { return NULL; } + $scheme = $url["scheme"]; + if (!in_array($scheme, array("http", "https"))) { + trigger_error("unsupported scheme: $scheme", E_USER_ERROR); + return NULL; + } + // Strip the leading www. to be more forgiving on input URLs. $host = preg_replace('/^www\./', '', $url["host"]); @@ -310,12 +332,12 @@ class Tweeper { return NULL; } - $html = $this->getContents($src_url); + $html = Tweeper::getUrlContents($src_url); if (FALSE === $html) { return NULL; } - $preprocess_html_host_method = 'preprocess_html_' . str_replace(".", "_", $host); + $preprocess_html_host_method = 'preprocessHtml' . Tweeper::toUpperCamelCase($host, '.'); if (method_exists($this, $preprocess_html_host_method)) { $html = call_user_func_array(array($this, $preprocess_html_host_method), array($html)); } @@ -413,17 +435,21 @@ function parse_options_query_string() { if (is_cli()) { $options = parse_options_cli($argv, $argc); - $ERROR_STREAM = fopen('php://stderr', 'w'); + $error_stream = fopen('php://stderr', 'w'); } else { $options = parse_options_query_string(); - $ERROR_STREAM = fopen('php://output', 'w'); + $error_stream = fopen('php://output', 'w'); } if (!isset($options['src_url'])) { - fwrite($ERROR_STREAM, usage(is_cli() ? $argv : NULL)); + fwrite($error_stream, usage(is_cli() ? $argv : NULL)); exit(1); } $tweeper = new Tweeper($options['generate_enclosure']); -echo $tweeper->tweep($options['src_url']); +$output = $tweeper->tweep($options['src_url']); +if (is_null($output)) { + exit(1); +} +echo $output;