Rename the 'links' variable in _add_link() to 'destination'

[GM_direct_download_links.git] / direct_download_links.user.js

diff --git a/direct_download_links.user.js b/direct_download_links.user.js
index 6d0f401..d430887 100644 (file)
--- a/direct_download_links.user.js
+++ b/direct_download_links.user.js
@@ -1,6 +1,6 @@
-// direct_download_links - Add direct download links for (video) files
-// version 0.1
-// 2011-08-02
+// direct_download_links - Add direct download links
+// version 0.2
+// 2011-11-14

 // Copyright (C) 2011  Antonio Ospite <ospite@studenti.unina.it>
 // Released under the GPL license
 // http://www.gnu.org/copyleft/gpl.html
 // Copyright (C) 2011  Antonio Ospite <ospite@studenti.unina.it>
 // Released under the GPL license
 // http://www.gnu.org/copyleft/gpl.html


@@ -22,44 +22,85 @@
 // ==UserScript==
 // @name           Direct Download Links
 // @namespace      http://git.ao2.it/GM_direct_download_links.git
 // ==UserScript==
 // @name           Direct Download Links
 // @namespace      http://git.ao2.it/GM_direct_download_links.git

-// @description    Add direct download links for (video) files
+// @description    Add direct download links

 // @include        http://video.repubblica.it/*
 // @include        http://tv.repubblica.it/*
 // @include        http://trovacinema.repubblica.it/*
 // @include        http://www.kataweb.it/tvzap/*
 // @include        http://video.repubblica.it/*
 // @include        http://tv.repubblica.it/*
 // @include        http://trovacinema.repubblica.it/*
 // @include        http://www.kataweb.it/tvzap/*

+// @include        http://www.rai.tv/*

 // ==/UserScript==
 // ==/UserScript==

+//
+// NOTE, for rai.tv to work you need to install a script like:
+// http://git.ao2.it/smooth-dl.git/blob_plain/HEAD:/scripts/SilverSpoof.user.js

 
 /*
  * TODO:
  *  - find a way to use the same string as in the @include lines to match the
 
 /*
  * TODO:
  *  - find a way to use the same string as in the @include lines to match the

- *    current window.location
+ *    current window.location. Look for something like GM_testUrl() which builds
+ *    the regexp starting from a glob line.
+ *  - use xpath instead of regexp like in http://a32.me/2009/11/greasemonkey/
+ *  - use jquery, like shown in http://a32.me/2009/11/greasemonkey/

  */
 
  */
 

+/* Fields supported by the "site" object.
+ *
+ * Manadatory fields:
+ *   pageURL: the URL of the page we are modifying
+ *   urlContainer: the element containing the URL to link
+ *   urlRegexp: the regular expression for finding the URL, the first
+ *              sub-pattern is taken as the URL
+ *   linkDest: the element where to place the Direct Download link
+ *
+ *
+ * Optional fields:
+ *   onEvent: used to delay the urlRegexp matching to a certain event like
+ *            'DOMNodeInserted' useful when the URL is added by some javascript
+ *            library. It has two fields:
+ *
+ *              evt: the event we want to wait for (e.g. 'DOMNodeInserted')
+ *
+ *              targetElement: the element in the event handler we want the
+ *                urlRegexp is performed on.
+ *
+ *  processURL: a function to process the URL before adding the Direct
+ *              Downdload Link to the page, it must accept  a 'site' and a
+ *              'URL' parameters and dispatch the UrlFetched to pass the
+ *              modified URL to _add_link().
+ *
+ */

 var supported_sites = [
   {
     locationRegexp: /^http:\/\/video\.repubblica\.it\/.*$/,
 var supported_sites = [
   {
     locationRegexp: /^http:\/\/video\.repubblica\.it\/.*$/,

-    fileElem: 'contA',
-    fileRegexp: /'pcUrl', '((http|mms):\/\/[^']*)'/,
+    urlContainer: 'contA',
+    urlRegexp: /'pcUrl', '((http|mms):\/\/[^']*)'/,

     linkDest: 'contA',
   },
   {
     locationRegexp: /^http:\/\/tv\.repubblica\.it\/.*$/,
     linkDest: 'contA',
   },
   {
     locationRegexp: /^http:\/\/tv\.repubblica\.it\/.*$/,

-    fileElem: 'boxPlayer',
-    fileRegexp: /'pcUrl', '((http|mms):\/\/[^']*)'/,
+    urlContainer: 'boxPlayer',
+    urlRegexp: /'pcUrl', '((http|mms):\/\/[^']*)'/,

     linkDest: 'box_embed',
   },
   {
     locationRegexp: /^http:\/\/trovacinema\.repubblica\.it\/.*$/,
     linkDest: 'box_embed',
   },
   {
     locationRegexp: /^http:\/\/trovacinema\.repubblica\.it\/.*$/,

-    fileElem: 'col-center',
-    fileRegexp: /'flvUrl', '((http|mms):\/\/[^']*)'/,
+    urlContainer: 'col-center',
+    urlRegexp: /'flvUrl', '((http|mms):\/\/[^']*)'/,

     linkDest: 'col-center',
   },
   {
     locationRegexp: /^http:\/\/www\.kataweb\.it\/tvzap\/.*$/,
     linkDest: 'col-center',
   },
   {
     locationRegexp: /^http:\/\/www\.kataweb\.it\/tvzap\/.*$/,

-    fileElem: 'tvzap_video',
-    fileRegexp: /'pcUrl', '((http|mms):\/\/[^']*)'/,
+    urlContainer: 'tvzap_video',
+    urlRegexp: /'pcUrl', '((http|mms):\/\/[^']*)'/,

     linkDest: 'playerCont',
   },
     linkDest: 'playerCont',
   },

+  {
+    locationRegexp: /^http:\/\/www\.rai\.tv\/.*$/,
+    urlContainer: 'Player',
+    urlRegexp: /mediaUri=(http:\/\/[^,]*)/,
+    onEvent: { evt: 'DOMNodeInserted', targetElement: 'object' },
+    processURL: _rai_get_actual_url,
+    linkDest: 'Player',
+  },

 ];
 
 /* Apply different rules to different sites */
 ];
 
 /* Apply different rules to different sites */


@@ -68,58 +109,129 @@ for (i = 0; i < supported_sites.length; i++) {
 
   var result = window.location.href.match(site.locationRegexp);
   if (result) {
 
   var result = window.location.href.match(site.locationRegexp);
   if (result) {

-    var ret = direct_download_link_add(window.location.href, site.fileElem, site.fileRegexp, site.linkDest);
-    if (!ret) {
-      alert('Cannot add the link');
-    }
+    direct_download_link_add(window.location.href, site);

   }
 }
 
 /**
   }
 }
 
 /**

- * Add a Direct Download link on the page for the specified file
+ * Add a Direct Download link on the page for the specified URL

  *
  *

- * @param pageURL: the URL of the page we are modifying
- * @param fileElem: the element containing the file URL
- * @param fileRegexp: the regular expression for finding the file, the first
- *                    sub-pattern is taken as the file URL
- * @param linkDest: the element where to place the Direct Download link
+ * @param: a 'site' object described above.

  *
  * @return: null on error, true on success
  */
  *
  * @return: null on error, true on success
  */

-function direct_download_link_add(pageURL, fileElem, fileRegexp, linkDest) {
-  var element = document.getElementById(fileElem);
+function direct_download_link_add(pageURL, site) {
+  var element = document.getElementById(site.urlContainer);

   if (!element) {
   if (!element) {

-    alert('DirectDL (' + pageURL  + '): Cannot find the element containing the file URL.');
+    DDL_log('DirectDL (' + site.pageURL  + '): Cannot find the element ' + site.urlContainer + ' containing the URL.');

     return null;
   }
 
     return null;
   }
 

-  var content = element.textContent;
+  document.addEventListener('UrlFetched', _add_link, true);
+
+  // This is used for sites adding the URL to the DOM after DOMContentLoaded,
+  // for example by some javascript library (like Silverlight.js on rai.tv).
+  if (site.onEvent) {
+    element.addEventListener(site.onEvent.evt, function(e) {
+      if (site.onEvent.targetElement &&
+          e.target.tagName.toLowerCase() != site.onEvent.targetElement) {
+        DDL_log('DirectDL (' + site.pageURL  + '): skipping element ' + e.target.tagName);
+        return;
+      }
+     _get_URL(site, element);
+    }, false);
+  }
+
+  _get_URL(site, element);
+}
+
+function _get_URL(site, element) {
+  var content = element.innerHTML;

   if (!content) {
   if (!content) {

-    alert('DirectDL (' + pageURL + '): textContent is null, cannot fild file URL.');
+    DDL_log('DirectDL (' + site.pageURL + '): content is null, cannot find URL.');
+    return;

   }
 
   }
 

-  var fileURL = content.match(fileRegexp)[1];
-  if (!fileURL) {
-      alert('DirectDL (' + pageURL + '): file URL not found, check the fileRegexp');
-      return null;
+  var matches = content.match(site.urlRegexp);
+  if (!matches || matches.length < 2 || !matches[1]) {
+      DDL_log('DirectDL (' + site.pageURL + '): URL not found, check the urlRegexp');
+      return;
+  }
+  var URL = matches[1];
+  if (!URL) {
+    DDL_log('DirectDL (' + site.pageURL + '): cannot get the URL.');
+    return;

   }
 
   }
 

-  var links = document.getElementById(linkDest);
-  if (!links) {
-    alert('DirectDl (' + pageURL + '): Cannot add the direct download link.');
-    return null;
+  if (site.processURL) {
+    site.processURL(site, URL);
+    return;
+  }
+
+  var evt = document.createEvent('Event');  
+  evt.initEvent('UrlFetched', true, true);  
+  evt.site = site;
+  evt.URL = URL;
+  document.dispatchEvent(evt);
+}
+
+function _add_link(e) {
+  var site = e.site;
+  var URL = e.URL;;
+
+  var destination = document.getElementById(site.linkDest);
+  if (!destination) {
+    DDL_log('DirectDl (' + site.pageURL + '): Cannot add the direct download link.');
+    return;

   }
 
   var download_link = document.createElement('a');
   download_link.textContent = 'Direct Link';
   }
 
   var download_link = document.createElement('a');
   download_link.textContent = 'Direct Link';

-  download_link.setAttribute('href', fileURL);
+  download_link.setAttribute('href', URL);

   var style = 'background-color: white; color: blue;';
   style += ' border: 2px solid red;'
   style += ' float: right; font-size: large;';
   style += ' padding: .5em; margin: 1em;'
   download_link.setAttribute('style', style);
 
   var style = 'background-color: white; color: blue;';
   style += ' border: 2px solid red;'
   style += ' float: right; font-size: large;';
   style += ' padding: .5em; margin: 1em;'
   download_link.setAttribute('style', style);
 

-  links.insertBefore(download_link, links.firstChild);
+  destination.insertBefore(download_link, destination.firstChild);
+}
+
+function DDL_log(message) {
+  var debug = false;
+  if (debug) {
+    alert(message)
+  } else {
+    GM_log(message);
+  }
+}
+
+function _rai_get_actual_url(site, URL) {
+  // http://www.neaveru.com/wordpress/index.php/2008/05/09/greasemonkey-bug-domnodeinserted-event-doesnt-allow-gm_xmlhttprequest/
+  setTimeout( function() {
+    GM_xmlhttpRequest({
+      method: "GET",
+      // XXX A custom header. This is the "clever" trick Rai uses to ensure
+      // the content is accessed by www.rai.tv only...
+      headers: {'viaurl': 'www.rai.tv'},
+      url: URL,
+      onload: function(response) {
+        text = response.responseText;
+        text = text.replace(/&/g, '&amp;')
+        parser = new DOMParser();
+        xmlDoc = parser.parseFromString(text, "text/xml");
+
+        ref = xmlDoc.getElementsByTagName('REF');
+        if (ref.length > 0) {
+          href = ref[0].getAttribute('HREF');;

 
 

-  return true;
+          var evt = document.createEvent('Event');  
+          evt.initEvent('UrlFetched', true, true);  
+          evt.site = site;
+          evt.URL = href;
+          document.dispatchEvent(evt);
+        }
+      }
+    });
+  }, 0);

 }
 }