From: Antonio Ospite <ospite@studenti.unina.it>
Date: Sun, 11 Aug 2013 23:22:35 +0000 (+0200)
Subject: Merge branch 'generate-enclosure-element'
X-Git-Tag: v0.1~12
X-Git-Url: https://git.ao2.it/tweeper.git/commitdiff_plain/ad1a1aabaa6107083bc3a53d57d61e569daf2d36?hp=8bd98bc2901384f621953eba4a1cbc4c1a9ccfcc

Merge branch 'generate-enclosure-element'
---

diff --git a/rss_converter_dilbert.com.xsl b/rss_converter_dilbert.com.xsl
index c686407..7394b91 100644
--- a/rss_converter_dilbert.com.xsl
+++ b/rss_converter_dilbert.com.xsl
@@ -52,7 +52,7 @@
                 <xsl:value-of select="concat($BaseURL, $picture-element/@src)"/>
             </link>
             <pubDate>
-                <xsl:value-of select="php:functionString('str_to_gmdate', substring-after($picture-id, 'strip_enlarged_'))"/>
+                <xsl:value-of select="php:functionString('Tweeper::str_to_gmdate', substring-after($picture-id, 'strip_enlarged_'))"/>
             </pubDate>
             <description>
                 <xsl:text disable-output-escaping="yes">&lt;![CDATA[</xsl:text>
diff --git a/rss_converter_pump.io.xsl b/rss_converter_pump.io.xsl
index ef4b6e8..6b05d0c 100644
--- a/rss_converter_pump.io.xsl
+++ b/rss_converter_pump.io.xsl
@@ -38,7 +38,7 @@
                 <xsl:value-of select=".//p[@class='muted']/small/a/@href"/>
             </link>
             <pubDate>
-                <xsl:value-of select="php:functionString('str_to_gmdate', .//abbr[@class='easydate']/@title)"/>
+                <xsl:value-of select="php:functionString('Tweeper::str_to_gmdate', .//abbr[@class='easydate']/@title)"/>
             </pubDate>
             <description>
                 <xsl:value-of select="concat($user-name, ': ')"/>
diff --git a/rss_converter_twitter.com.xsl b/rss_converter_twitter.com.xsl
index 5a57c8f..b67946e 100644
--- a/rss_converter_twitter.com.xsl
+++ b/rss_converter_twitter.com.xsl
@@ -23,12 +23,18 @@
     xmlns:php="http://php.net/xsl"
     xsl:extension-element-prefixes="php">
 
+    <xsl:param name="generateEnclosure"/>
+
     <xsl:output method="xml" indent="yes"/>
 
     <xsl:variable name="twitterBaseURL">
         <xsl:text>https://twitter.com</xsl:text>
     </xsl:variable>
 
+    <xsl:template match="a[@data-expanded-url]">
+        <xsl:value-of disable-output-escaping="yes" select="php:function('Tweeper::generate_enclosure', string(./@data-expanded-url))"/>
+    </xsl:template>
+
     <xsl:variable name="screen-name" select="//div[@class='profile-card-inner']/@data-screen-name"/>
 
     <xsl:template match="//div[@id='timeline']//ol[@id='stream-items-id']//li[@data-item-type='tweet']">
@@ -41,7 +47,7 @@
                 <xsl:value-of select="concat($twitterBaseURL, .//a[@class='details with-icn js-details']/@href)"/>
             </link>
             <pubDate>
-                <xsl:value-of select="php:functionString('epoch_to_gmdate', .//small[@class='time']//span/@data-time)"/>
+                <xsl:value-of select="php:functionString('Tweeper::epoch_to_gmdate', .//small[@class='time']//span/@data-time)"/>
             </pubDate>
             <description>
                 <xsl:value-of select="concat($screen-name, ': ')"/>
@@ -49,6 +55,9 @@
                 <xsl:copy-of select="$tweet-text/node()"/>
                 <xsl:text disable-output-escaping="yes">]]&gt;</xsl:text>
             </description>
+            <xsl:if test="$generateEnclosure = 1">
+                <xsl:apply-templates select="$tweet-text//a[@data-expanded-url]"/>
+            </xsl:if>
         </item>
     </xsl:template>
 
diff --git a/tweeper.php b/tweeper.php
index 2ca4996..c2c5a04 100644
--- a/tweeper.php
+++ b/tweeper.php
@@ -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();
@@ -43,28 +32,97 @@ 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($ch, array(
+      CURLOPT_HEADER => FALSE,
+      CURLOPT_RETURNTRANSFER => TRUE,
+      CURLOPT_SSL_VERIFYHOST => FALSE,
+      CURLOPT_SSL_VERIFYPEER => FALSE,
+      CURLOPT_HTTPHEADER => array('Accept-language: en'),
+      CURLOPT_USERAGENT => Tweeper::$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/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);
+  }
+
   public function tweep($uri) {
-    $html = $this->get_contents($uri);
+    $html = Tweeper::get_contents($uri);
 
     $xmlDoc = new DOMDocument();
     $xmlDoc->loadHTML($html);
@@ -82,32 +140,73 @@ class Tweeper {
 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";
 }
 
-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:
+      die(usage($argv));
+    }
   }
-  $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 (php_sapi_name() != 'cli')
+  $options = parse_options_query_string();
+else
+  $options = parse_options_cli($argv, $argc);
+
+if (!isset($options['src_url']))
+  die(usage($argv));
+
+$url = parse_url($options['src_url']);
 if (FALSE === $url || empty($url["host"]))
-  die("Invalid url: $src_url\n");
+  die("Invalid url: ${options['src_url']}\n");
 
-$stylesheet = __DIR__ . "/rss_converter_" . $url["host"] . ".xsl";
+$stylesheet = "file://" . __DIR__ . "/rss_converter_" . $url["host"] . ".xsl";
 if (FALSE === file_exists($stylesheet))
   die("Conversion to RSS not supported: {$url["host"]}\n");
 
-$tweeper = new Tweeper($stylesheet);
-echo $tweeper->tweep($src_url);
+$tweeper = new Tweeper($stylesheet, $options['generate_enclosure']);
+echo $tweeper->tweep($options['src_url']);