Download video from nicovideo.jp

nicovideoddl.js

(function() {
  if (location.href.indexOf("http://www.nicovideo.jp/watch/")!=-1) {
    //　find "watch/smXXX" style URI
    $link   = $('link').find('[rel=canonical]');
    origURI = $link.length ? $link.attr('href') : window.location.href;

    // find title
    var $title = jQuery('.videoHeaderTitle');

    // collect file information
    var videoIdentifier = location.href.replace(/http.*?watch\/([^?]*)(\?.*)?$/g,"$1");

    // replace title
    $input = $('<input type="text" value="[' + videoIdentifier + '] ' + $title.text() + '" />');
    $input.click($input.get(0).select);
    $input.css({width: $title.width()});
    $title.text('').css({'font-size':'12px'});   
    $title=jQuery('#videoHeader').append($input);

    console.log('video id: ' + videoIdentifier);

    jQuery.ajax({
        url: "http://flapi.nicovideo.jp/api/getflv?v="+videoIdentifier,
        crossDomain: true,
        xhrFields: { withCredentials: true },
        //headers: { "X-Requested-With": "XMLHttpRequest" },
        success: function(response){
            var tid=unescape(/thread_id\=(.*?)\&l/.exec(response)[1]);
            var vn=/watch\/(.*?)$/.exec(origURI)[1];
            var flvURL=unescape(/url\=(.*?)\&link/.exec(response)[1]);
            if (/nm/.exec(videoIdentifier)) {
              flvURL += "as3";
            }

            $title.append($('<a/>', {text: '[DL]', href: flvURL}));

            if (tid != "") {// make links for "bgm" (custom banner above video)
              jQuery.ajax({
                  url: "http://flapi.nicovideo.jp/api/getbgm?v="+videoIdentifier,
                  crossDomain: true,
                  xhrFields: { withCredentials: true },
                  success: function(xml, success, jqXHR){
                      var $url = $(xml).find('url');
                      if ($url.length > 0) {
                          var bgmURL=$url.eq(0).text();
                          var bgmIdentifier=/s=(.*?)\./.exec(bgmURL)[1];

                          $title.append($('<a/>', {text: '[BGM]', href: "http://www.nicovideo.jp/watch/nm"+bgmIdentifier}));
                          $title.append($('<a/>', {text: '[BGM DL]', href: bgmURL}));
                      }
                  }
              });
            }
        },
        error: function(request, status, error) { 
            console.log("on error: " + error + " status: " + status);
        }
    });
  };
})();