X-Git-Url: https://git.ao2.it/tweeper.git/blobdiff_plain/07fd996387c49114393a092eaca8ba622872586b..a2f080251d11941e8585e5a583919baf8c9a50f9:/tweeper.php?ds=inline diff --git a/tweeper.php b/tweeper.php old mode 100755 new mode 100644 index 3b8fb2d..4be5c7d --- a/tweeper.php +++ b/tweeper.php @@ -2,7 +2,7 @@ /* * tweeper - a Twitter to RSS web scraper * - * Copyright (C) 2013 Antonio Ospite + * Copyright (C) 2013-2014 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 @@ -20,22 +20,11 @@ date_default_timezone_set('UTC'); -function str_to_gmdate($date) -{ - $timestamp = strtotime($date); - return epoch_to_gmdate($timestamp); -} - -function epoch_to_gmdate($timestamp) -{ - return gmdate('D, d M Y H:i:s', $timestamp) . ' GMT'; -} - class Tweeper { - private $USER_AGENT = "Mozilla/5.0 (Windows NT 6.1; rv:22.0) Gecko/20130405 Firefox/22.0"; + private static $USER_AGENT = "Mozilla/5.0 (Windows NT 6.1; rv:22.0) Gecko/20130405 Firefox/22.0"; - public function __construct($stylesheet) { + public function __construct($stylesheet, $generate_enclosure = FALSE) { $stylesheet_contents = $this->get_contents($stylesheet); $xslDoc = new DOMDocument(); @@ -43,31 +32,139 @@ class Tweeper { $this->xsltProcessor = new XSLTProcessor(); $this->xsltProcessor->registerPHPFunctions(); + $this->xsltProcessor->setParameter('', 'generateEnclosure', $generate_enclosure); $this->xsltProcessor->importStylesheet($xslDoc); } - 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 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); - $context = stream_context_create($opts); - $contents = file_get_contents($uri, false, $context); 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,"; + } + + $output .=" line $error->line"; + + error_log($output); + } + public function tweep($uri) { - $html = $this->get_contents($uri); + $html = Tweeper::get_contents($uri); $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); @@ -82,32 +179,83 @@ 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]; + + $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; +} + + +if (php_sapi_name() != 'cli') { + $options = parse_options_query_string(); + $ERROR_STREAM = fopen('php://output', 'w'); } else { - die(usage($argv)); + $options = parse_options_cli($argv, $argc); + $ERROR_STREAM = fopen('php://stderr', 'w'); +} + +if (!isset($options['src_url'])) { + fwrite($ERROR_STREAM, usage($argv)); + exit(1); } -$url = parse_url($src_url); -if (FALSE === $url || empty($url["host"])) - die("Invalid url: $url\n"); +$url = parse_url($options['src_url']); +if (FALSE === $url || empty($url["host"])) { + fwrite($ERROR_STREAM, "Invalid url: ${options['src_url']}\n"); + exit(1); +} -$stylesheet = __DIR__ . "/rss_converter_" . $url["host"] . ".xsl"; -if (FALSE === file_exists($stylesheet)) - die("Conversion to RSS not supported: {$url["host"]}\n"); +$stylesheet = "file://" . __DIR__ . "/rss_converter_" . $url["host"] . ".xsl"; +if (FALSE === file_exists($stylesheet)) { + fwrite($ERROR_STREAM, "Conversion to RSS not supported: {$url["host"]}\n"); + exit(1); +} -$tweeper = new Tweeper($stylesheet); -echo $tweeper->tweep($src_url); +$tweeper = new Tweeper($stylesheet, $options['generate_enclosure']); +echo $tweeper->tweep($options['src_url']);