<?php
/*
* tweeper - a Twitter to RSS web scraper
- *
- * Copyright (C) 2013 Antonio Ospite <ospite@studenti.unina.it>
- *
+ *
+ * Copyright (C) 2013-2015 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
* 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 <http://www.gnu.org/licenses/>.
*/
+require_once 'XML/Serializer.php';
+
date_default_timezone_set('UTC');
class Tweeper {
private static $USER_AGENT = "Mozilla/5.0 (Windows NT 6.1; rv:22.0) Gecko/20130405 Firefox/22.0";
- public function __construct($stylesheet, $generate_enclosure = FALSE) {
- $stylesheet_contents = $this->get_contents($stylesheet);
-
- $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 function __construct($generate_enclosure = FALSE) {
+ $this->generate_enclosure = $generate_enclosure;
}
public static function epoch_to_gmdate($timestamp)
"audio/aac",
"audio/mp4",
"audio/mpeg",
+ "audio/ogg",
"audio/vorbis",
"audio/wav",
"audio/webm",
"video/ogg",
);
- $url_info = Tweeper::get_info($url);
+ // 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);
+
+ $url_info = Tweeper::get_info($http_url);
$supported = in_array($url_info['content_type'], $supported_content_types);
if (!$supported) {
return $dom->saveXML($enc);
}
- public function tweep($uri) {
- $html = Tweeper::get_contents($uri);
+ /* 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);
+ }
+
+ 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;
+ }
+
+ $stylesheet_contents = $this->get_contents($stylesheet);
+
+ $xslDoc = new DOMDocument();
+ $xslDoc->loadXML($stylesheet_contents);
+
+ $xsltProcessor = new XSLTProcessor();
+ $xsltProcessor->registerPHPFunctions();
+ $xsltProcessor->setParameter('', 'generateEnclosure', $this->generate_enclosure);
+ $xsltProcessor->importStylesheet($xslDoc);
+
+ return $xsltProcessor;
+ }
+
+ private function json_to_xml($html, $json_match_expr, $rootName) {
+ // pre-process, convert json to XML
+ $ret = preg_match($json_match_expr, $html, $matches);
+ if ($ret !== 1) {
+ trigger_error("Cannot match expression: $json_match_expr\n", E_USER_ERROR);
+ return NULL;
+ }
+
+ $data = json_decode($matches[1]);
+ if (!$data) {
+ return NULL;
+ }
+
+ $serializer_options = array (
+ 'addDecl' => TRUE,
+ 'encoding' => "UTF-8",
+ 'indent' => ' ',
+ 'rootName' => $rootName,
+ );
+
+ $serializer = new XML_Serializer($serializer_options);
+ $status = $serializer->serialize($data);
+ if (PEAR::isError($status)) {
+ trigger_error($status->getMessage(), E_USER_ERROR);
+ return NULL;
+ }
+
+ return $serializer->getSerializedData();
+ }
+
+ private function html_to_xml($html, $host) {
$xmlDoc = new DOMDocument();
- $xmlDoc->loadHTML($html);
- $output = $this->xsltProcessor->transformToXML($xmlDoc);
+ // 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(".", "_", $host);
+ if (method_exists($this, $get_xml_host_method)) {
+ $xml_data = call_user_func_array(array($this, $get_xml_host_method), array($html));
+ $xmlDoc->loadXML($xml_data);
+ } else {
+ $xmlDoc->loadHTML($html);
+ }
+
+ foreach (libxml_get_errors() as $xml_error) {
+ $this->log_xml_error($xml_error);
+ }
+ libxml_clear_errors();
+ libxml_use_internal_errors($xml_errors_value);
+
+ return $xmlDoc;
+ }
+
+ public function tweep($src_url) {
+ $url = parse_url($src_url);
+ if (FALSE === $url || empty($url["host"])) {
+ trigger_error("Invalid url: $src_url", E_USER_ERROR);
+ return NULL;
+ }
+
+ $xsltProcessor = $this->load_stylesheet($url["host"]);
+ if (NULL === $xsltProcessor) {
+ return NULL;
+ }
+
+ $html = $this->get_contents($src_url);
+ if (FALSE === $html) {
+ return NULL;
+ }
+
+ $xmlDoc = $this->html_to_xml($html, $url["host"]);
+ if (NULL === $xmlDoc) {
+ return NULL;
+ }
+
+ $output = $xsltProcessor->transformToXML($xmlDoc);
if (FALSE === $output) {
trigger_error('XSL transformation failed.', E_USER_ERROR);
echo usage($argv);
exit(0);
default:
- die(usage($argv));
+ fwrite(STDERR, usage($argv));
+ exit(1);
}
}
}
-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($argv));
-
-$url = parse_url($options['src_url']);
-if (FALSE === $url || empty($url["host"]))
- die("Invalid url: ${options['src_url']}\n");
-
-$stylesheet = "file://" . __DIR__ . "/rss_converter_" . $url["host"] . ".xsl";
-if (FALSE === file_exists($stylesheet))
- die("Conversion to RSS not supported: {$url["host"]}\n");
+if (!isset($options['src_url'])) {
+ fwrite($ERROR_STREAM, usage($argv));
+ exit(1);
+}
-$tweeper = new Tweeper($stylesheet, $options['generate_enclosure']);
+$tweeper = new Tweeper($options['generate_enclosure']);
echo $tweeper->tweep($options['src_url']);
projects / tweeper.git / blobdiff