/*
* tweeper - a Twitter to RSS web scraper
*
- * Copyright (C) 2013 Antonio Ospite <ospite@studenti.unina.it>
+ * Copyright (C) 2013-2014 Antonio Ospite <ao2@ao2.it>
*
* 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
date_default_timezone_set('UTC');
-define('USER_AGENT', 'Mozilla/5.0 (Windows NT 6.1; rv:22.0) Gecko/20130405 Firefox/22.0');
+class Tweeper {
-function str_to_gmdate($date)
-{
- $timestamp = strtotime($date);
- return epoch_to_gmdate($timestamp);
-}
+ private static $USER_AGENT = "Mozilla/5.0 (Windows NT 6.1; rv:22.0) Gecko/20130405 Firefox/22.0";
-function epoch_to_gmdate($timestamp)
-{
- return gmdate('D, d M Y H:i:s', $timestamp) . ' GMT';
-}
+ public function __construct($stylesheet, $generate_enclosure = FALSE) {
+ $stylesheet_contents = $this->get_contents($stylesheet);
-function get_url_info($url)
-{
- $ch = curl_init($url);
- curl_setopt_array($ch, array(
+ $xslDoc = new DOMDocument();
+ $xslDoc->loadXML($stylesheet_contents);
+
+ $this->xsltProcessor = new XSLTProcessor();
+ $this->xsltProcessor->registerPHPFunctions();
+ $this->xsltProcessor->setParameter('', 'generateEnclosure', $generate_enclosure);
+ $this->xsltProcessor->importStylesheet($xslDoc);
+ }
+
+ 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($ch, array(
CURLOPT_HEADER => TRUE,
CURLOPT_NOBODY => TRUE,
CURLOPT_FOLLOWLOCATION => TRUE, // follow http redirects to get the real URL
CURLOPT_RETURNTRANSFER => TRUE,
CURLOPT_SSL_VERIFYHOST => FALSE,
CURLOPT_SSL_VERIFYPEER => FALSE,
- CURLOPT_USERAGENT => USER_AGENT,
- ));
- curl_exec($ch);
- $url_info = curl_getinfo($ch);;
- curl_close($ch);
+ CURLOPT_USERAGENT => Tweeper::$USER_AGENT,
+ ));
+ curl_exec($ch);
+ $url_info = curl_getinfo($ch);
+ curl_close($ch);
- return $url_info;
-}
-
-function generate_enclosure($url)
-{
- $url_info = get_url_info($url);
-
- switch($url_info['content_type']) {
- case "video/avi":
- case "image/gif":
- case "image/jpeg":
- case "audio/x-midi":
- case "audio/mpeg":
- case "video/mpeg":
- case "audio/vorbis":
- case "application/ogg":
- case "audio/webm":
- case "audio/aac":
- case "audio/mp4":
- case "audio/wav":
- case "video/mp4":
- case "video/ogg":
- $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);
- default:
- return;
+ 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",
+ );
-class Tweeper {
+ $url_info = Tweeper::get_info($url);
- public function __construct($stylesheet) {
- $stylesheet_contents = $this->get_contents($stylesheet);
+ $supported = in_array($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 '';
+ }
- $xslDoc = new DOMDocument();
- $xslDoc->loadXML($stylesheet_contents);
+ $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']);
- $this->xsltProcessor = new XSLTProcessor();
- $this->xsltProcessor->registerPHPFunctions();
- $this->xsltProcessor->importStylesheet($xslDoc);
+ $dom->appendChild($enc);
+
+ return $dom->saveXML($enc);
}
- private function get_contents($uri) {
- # https://www.wjsams.com/c/docs/Wiki/Php-HowToSetUserAgentOnFileGetContents
- $opts = array(
- 'http' => array(
- 'method' => "GET",
- 'header' => join(array(
- "Accept-language: en\r\n",
- "User-Agent: {" + USER_AGENT + "}\r\n"
- ))
- )
- );
+ /* Mimic the message from libxml.c::php_libxml_ctx_error_level() */
+ private function log_xml_error($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;
+ }
- $context = stream_context_create($opts);
- $contents = file_get_contents($uri, false, $context);
- return $contents;
+ $output .= trim($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);
function usage($argv)
{
if (php_sapi_name() != 'cli')
- $usage = htmlentities("{$_SERVER['SCRIPT_NAME']}?src_url=<src_url>");
+ $usage = htmlentities("{$_SERVER['SCRIPT_NAME']}?src_url=<src_url>&generate_enclosure=<0|1>");
else
- $usage = "{$argv[0]} <src_url>\n";
+ $usage = "{$argv[0]} [-e|-h|--help] <src_url>\n";
return "usage: $usage";
}
function parse_options_cli($argv, $argc)
{
- $options = array();
+ $options = array(
+ 'generate_enclosure' => FALSE
+ );
if ($argc < 2)
return $options;
- if ($argv[1] == "-h" || $argv[1] == "--help")
- echo usage($argv);
- else
- $options['src_url'] = $argv[1];
+ $cli_options = getopt("eh", array("help"));
+ foreach ($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);
+ }
+ }
+
+ $options['src_url'] = $argv[count($cli_options) + 1];
return $options;
}
function parse_options_query_string()
{
- $options = array();
+ $options = array(
+ 'generate_enclosure' => FALSE
+ );
if (isset($_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')
+if (php_sapi_name() != 'cli') {
$options = parse_options_query_string();
-else
+ $ERROR_STREAM = fopen('php://output', 'w');
+} else {
$options = parse_options_cli($argv, $argc);
+ $ERROR_STREAM = fopen('php://stderr', 'w');
+}
-if (!isset($options['src_url']))
- die(usage($argv));
+if (!isset($options['src_url'])) {
+ fwrite($ERROR_STREAM, usage($argv));
+ exit(1);
+}
$url = parse_url($options['src_url']);
-if (FALSE === $url || empty($url["host"]))
- die("Invalid url: ${options['src_url']}\n");
+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);
+$tweeper = new Tweeper($stylesheet, $options['generate_enclosure']);
echo $tweeper->tweep($options['src_url']);
projects / tweeper.git / blobdiff