X-Git-Url: https://git.ao2.it/tweeper.git/blobdiff_plain/ca48a4bd30bcb7fb72b3c7ced9023a86f3fb87c7..50842e9d4c8ba313313710d0b4472548390cd77b:/tweeper.php diff --git a/tweeper.php b/tweeper.php index 2ca4996..17fff8b 100644 --- a/tweeper.php +++ b/tweeper.php @@ -1,75 +1,195 @@ - * + * + * Copyright (C) 2013-2015 Antonio Ospite + * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. - * + * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. - * + * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ date_default_timezone_set('UTC'); -function str_to_gmdate($date) -{ - $timestamp = strtotime($date); - return epoch_to_gmdate($timestamp); -} +class Tweeper { -function epoch_to_gmdate($timestamp) -{ - return gmdate('D, d M Y H:i:s', $timestamp) . ' GMT'; -} + private static $USER_AGENT = "Mozilla/5.0 (Windows NT 6.1; rv:22.0) Gecko/20130405 Firefox/22.0"; -class Tweeper { + public function __construct($generate_enclosure = FALSE) { + $this->generate_enclosure = $generate_enclosure; + } + + public static function epoch_to_gmdate($timestamp) + { + return gmdate('D, d M Y H:i:s', $timestamp) . ' GMT'; + } + + public static function str_to_gmdate($date) + { + $timestamp = strtotime($date); + return Tweeper::epoch_to_gmdate($timestamp); + } + + private static function get_contents($url) + { + $ch = curl_init($url); + curl_setopt_array($ch, array( + CURLOPT_HEADER => FALSE, + CURLOPT_FOLLOWLOCATION => TRUE, // follow http redirects to get the real URL + CURLOPT_RETURNTRANSFER => TRUE, + CURLOPT_SSL_VERIFYHOST => FALSE, + CURLOPT_SSL_VERIFYPEER => FALSE, + CURLOPT_HTTPHEADER => array('Accept-language: en'), + CURLOPT_USERAGENT => Tweeper::$USER_AGENT, + )); + $contents = curl_exec($ch); + curl_close($ch); + + return $contents; + } + + private static function get_info($url) + { + $ch = curl_init($url); + curl_setopt_array($ch, array( + CURLOPT_HEADER => TRUE, + CURLOPT_NOBODY => TRUE, + CURLOPT_FOLLOWLOCATION => TRUE, // follow http redirects to get the real URL + CURLOPT_RETURNTRANSFER => TRUE, + CURLOPT_SSL_VERIFYHOST => FALSE, + CURLOPT_SSL_VERIFYPEER => FALSE, + CURLOPT_USERAGENT => Tweeper::$USER_AGENT, + )); + curl_exec($ch); + $url_info = curl_getinfo($ch); + curl_close($ch); + + return $url_info; + } + + public static function generate_enclosure($url) + { + $supported_content_types = array( + "application/ogg", + "audio/aac", + "audio/mp4", + "audio/mpeg", + "audio/ogg", + "audio/vorbis", + "audio/wav", + "audio/webm", + "audio/x-midi", + "image/gif", + "image/jpeg", + "video/avi", + "video/mp4", + "video/mpeg", + "video/ogg", + ); + + $url_info = Tweeper::get_info($url); + + $supported = in_array($url_info['content_type'], $supported_content_types); + if (!$supported) { + error_log("Unsupported enclosure content type \"" . $url_info['content_type'] . "\" for URL: " . $url_info['url']); + return ''; + } + + $dom = new DomDocument(); + $enc = $dom->createElement('enclosure'); + $enc->setAttribute('url', $url_info['url']); + $enc->setAttribute('length', $url_info['download_content_length']); + $enc->setAttribute('type', $url_info['content_type']); + + $dom->appendChild($enc); + + return $dom->saveXML($enc); + } + + /* Mimic the message from libxml.c::php_libxml_ctx_error_level() */ + private function log_xml_error($error) { + $output = ""; + + switch ($error->level) { + case LIBXML_ERR_WARNING: + $output .= "Warning $error->code: "; + break; + case LIBXML_ERR_ERROR: + $output .= "Error $error->code: "; + break; + case LIBXML_ERR_FATAL: + $output .= "Fatal Error $error->code: "; + break; + } + + $output .= trim($error->message); + + if ($error->file) { + $output .= " in $error->file"; + } else { + $output .= " in Entity,"; + } - private $USER_AGENT = "Mozilla/5.0 (Windows NT 6.1; rv:22.0) Gecko/20130405 Firefox/22.0"; + $output .=" line $error->line"; + + error_log($output); + } + + private function load_stylesheet($host) { + $stylesheet = "file://" . __DIR__ . "/rss_converter_" . $host . ".xsl"; + if (FALSE === file_exists($stylesheet)) { + trigger_error("Conversion to RSS not supported: $host", E_USER_ERROR); + return NULL; + } - public function __construct($stylesheet) { $stylesheet_contents = $this->get_contents($stylesheet); $xslDoc = new DOMDocument(); $xslDoc->loadXML($stylesheet_contents); - $this->xsltProcessor = new XSLTProcessor(); - $this->xsltProcessor->registerPHPFunctions(); - $this->xsltProcessor->importStylesheet($xslDoc); + $xsltProcessor = new XSLTProcessor(); + $xsltProcessor->registerPHPFunctions(); + $xsltProcessor->setParameter('', 'generateEnclosure', $this->generate_enclosure); + $xsltProcessor->importStylesheet($xslDoc); + + return $xsltProcessor; } - private function get_contents($uri) { - # https://www.wjsams.com/c/docs/Wiki/Php-HowToSetUserAgentOnFileGetContents - $opts = array( - 'http' => array( - 'method' => "GET", - 'header' => join(array( - "Accept-language: en\r\n", - "User-Agent: {$this->USER_AGENT}\r\n" - )) - ) - ); + public function tweep($src_url) { + $url = parse_url($src_url); + if (FALSE === $url || empty($url["host"])) { + trigger_error("Invalid url: $src_url", E_USER_ERROR); + return NULL; + } - $context = stream_context_create($opts); - $contents = file_get_contents($uri, false, $context); - return $contents; - } + $xsltProcessor = $this->load_stylesheet($url["host"]); + if (NULL === $xsltProcessor) { + return NULL; + } - public function tweep($uri) { - $html = $this->get_contents($uri); + $html = Tweeper::get_contents($src_url); $xmlDoc = new DOMDocument(); + + // Handle warnings and errors when loading invalid HTML. + $xml_errors_value = libxml_use_internal_errors(true); $xmlDoc->loadHTML($html); + foreach (libxml_get_errors() as $xml_error) { + $this->log_xml_error($xml_error); + } + libxml_clear_errors(); + libxml_use_internal_errors($xml_errors_value); - $output = $this->xsltProcessor->transformToXML($xmlDoc); + $output = $xsltProcessor->transformToXML($xmlDoc); if (FALSE === $output) { trigger_error('XSL transformation failed.', E_USER_ERROR); @@ -82,32 +202,71 @@ class Tweeper { function usage($argv) { if (php_sapi_name() != 'cli') - $usage = htmlentities("{$_SERVER['SCRIPT_NAME']}?src_url="); + $usage = htmlentities("{$_SERVER['SCRIPT_NAME']}?src_url=&generate_enclosure=<0|1>"); else - $usage = "{$argv[0]} \n"; + $usage = "{$argv[0]} [-e|-h|--help] \n"; return "usage: $usage"; } -if (isset($_GET['src_url'])) { - $src_url = $_GET['src_url']; -} else if (isset($argv[1])) { - if ($argv[1] == "-h" || $argv[1] == "--help") { - echo usage($argv); - return 0; +function parse_options_cli($argv, $argc) +{ + $options = array( + 'generate_enclosure' => FALSE + ); + + if ($argc < 2) + return $options; + + $cli_options = getopt("eh", array("help")); + foreach ($cli_options as $opt => $val) { + switch ($opt) { + case 'e': + $options['generate_enclosure'] = TRUE; + break; + case 'h': + case 'help': + echo usage($argv); + exit(0); + default: + fwrite(STDERR, usage($argv)); + exit(1); + } } - $src_url = $argv[1]; -} else { - die(usage($argv)); + + $options['src_url'] = $argv[count($cli_options) + 1]; + + return $options; +} + +function parse_options_query_string() +{ + $options = array( + 'generate_enclosure' => FALSE + ); + + if (isset($_GET['src_url'])) + $options['src_url'] = $_GET['src_url']; + + if (isset($_GET['generate_enclosure'])) + $options['generate_enclosure'] = $_GET['generate_enclosure'] == 1; + + return $options; } -$url = parse_url($src_url); -if (FALSE === $url || empty($url["host"])) - die("Invalid url: $src_url\n"); -$stylesheet = __DIR__ . "/rss_converter_" . $url["host"] . ".xsl"; -if (FALSE === file_exists($stylesheet)) - die("Conversion to RSS not supported: {$url["host"]}\n"); +if (php_sapi_name() != 'cli') { + $options = parse_options_query_string(); + $ERROR_STREAM = fopen('php://output', 'w'); +} else { + $options = parse_options_cli($argv, $argc); + $ERROR_STREAM = fopen('php://stderr', 'w'); +} + +if (!isset($options['src_url'])) { + fwrite($ERROR_STREAM, usage($argv)); + exit(1); +} -$tweeper = new Tweeper($stylesheet); -echo $tweeper->tweep($src_url); +$tweeper = new Tweeper($options['generate_enclosure']); +echo $tweeper->tweep($options['src_url']);