From 1e04fc440d06b3871575bae5902167282fd1476e Mon Sep 17 00:00:00 2001
From: Torsten Grote <t@grobox.de>
Date: Sun, 4 Aug 2013 22:00:51 +0200
Subject: [PATCH] add initial support for enclosures

---
 rss_converter_twitter.com.xsl |  1 +
 tweeper.php                   | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/rss_converter_twitter.com.xsl b/rss_converter_twitter.com.xsl
index 5a57c8f..c7f03c2 100644
--- a/rss_converter_twitter.com.xsl
+++ b/rss_converter_twitter.com.xsl
@@ -49,6 +49,7 @@
                 <xsl:copy-of select="$tweet-text/node()"/>
                 <xsl:text disable-output-escaping="yes">]]&gt;</xsl:text>
             </description>
+            <xsl:value-of disable-output-escaping="yes" select="php:function('generate_enclosure', string(.//a[@class='twitter-timeline-link']/@data-expanded-url))"/>
         </item>
     </xsl:template>
 
diff --git a/tweeper.php b/tweeper.php
index 2ca4996..cd2c3ba 100644
--- a/tweeper.php
+++ b/tweeper.php
@@ -31,6 +31,39 @@ function epoch_to_gmdate($timestamp)
   return gmdate('D, d M Y H:i:s', $timestamp) . ' GMT';
 }
 
+function get_url_info($url)
+{
+  $ch = curl_init($url);
+  curl_setopt_array($ch, array(
+      CURLOPT_HEADER => TRUE,          // get the header
+      CURLOPT_NOBODY => TRUE,          // don't donwload body
+      CURLOPT_FOLLOWLOCATION => TRUE,  // the magic sauce
+      CURLOPT_RETURNTRANSFER => TRUE,
+      CURLOPT_SSL_VERIFYHOST => FALSE, // suppress certain SSL errors
+      CURLOPT_SSL_VERIFYPEER => FALSE,
+  ));
+  curl_exec($ch);
+  $url_info = curl_getinfo($ch);;
+  curl_close($ch);
+
+  return $url_info;
+}
+
+function generate_enclosure($url) {
+  $url_info = get_url_info($url);
+
+  $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);
+}
+
+
 class Tweeper {
 
   private $USER_AGENT = "Mozilla/5.0 (Windows NT 6.1; rv:22.0) Gecko/20130405 Firefox/22.0";
-- 
2.1.4