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diff --git a/ldrize_cooperation_fetch_flv.js b/ldrize_cooperation_fetch_flv.js
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+++ b/ldrize_cooperation_fetch_flv.js
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+// Vimperator plugin: 'Cooperation LDRize Mappings - Niconico Flv Fetchearg || liberator.buffer.URLr'
+// Version: 0.4
+// Last Change: 05-Nov-2008. Jan 2008
+// License: Creative Commons
+// Maintainer: Trapezoid <trapezoid.g@gmail.com> - http://unsigned.g.hatena.ne.jp/Trapezoid
+//
+// Cooperation LDRize Mappings - Niconico Flv Fetcher for vimperator0.6.*
+// Require LDRize Cooperation ver 0.14
+(function(){
+    function NiconicoFlvHandler(url,title){
+        const nicoApiEndPoint = "http://www.nicovideo.jp/api/getflv?v=";
+        const nicoWatchEndPoint = "http://www.nicovideo.jp/watch/";
+        var videoId = url.match(/\wm\d+/)[0];
+        var fileName = title.replace(/[?\\\*\/:<>\|\"]/g,'_') + ".flv";
+        httpGET(nicoApiEndPoint + videoId,function(apiResult){
+            var flvUrl = decodeURIComponent(apiResult.match(/url=(.*?)&/)[1]);
+
+            httpGET(nicoWatchEndPoint + videoId,function(watchPage){
+                try{
+                    var DownloadManager = Cc["@mozilla.org/download-manager;1"]
+                        .getService(Ci.nsIDownloadManager);
+                    var WebBrowserPersist = Cc["@mozilla.org/embedding/browser/nsWebBrowserPersist;1"]
+                        .createInstance(Ci.nsIWebBrowserPersist);
+
+                    var sourceUri = makeURI(flvUrl,null,null);
+                    var file = DownloadManager.userDownloadsDirectory;
+                    file.appendRelativePath(fileName);
+                    var fileUri = makeFileURI(file);
+
+                    var download = DownloadManager.addDownload(0, sourceUri, fileUri, fileName,
+                            null, null, null, null, WebBrowserPersist);
+                    WebBrowserPersist.progressListener = download;
+                    WebBrowserPersist.saveURI(sourceUri, null, null, null, null, file);
+                }catch(e){log(e);liberator.echoerr(e)}
+            });
+        });
+    }
+
+    function setupLDRizeCooperationNiconicoFlvFetcher(){
+        var NiconicoFlvFetcher = {
+            pattern: 'http://www.nicovideo.jp/watch/*',
+            handler: NiconicoFlvHandler,
+            wait: 5000
+        }
+        this.convertHandlerInfo([NiconicoFlvFetcher]);
+        this.handlerInfo.unshift(NiconicoFlvFetcher);
+    }
+
+    if(liberator.plugins.LDRizeCooperation == undefined){
+        liberator.plugins.LDRizeCooperationPlugins = liberator.plugins.LDRizeCooperationPlugins || [];
+        liberator.plugins.LDRizeCooperationPlugins.push(setupLDRizeCooperationNiconicoFlvFetcher);
+    }else{
+        setupLDRizeCooperationNiconicoFlvFetcher.apply(liberator.plugins.LDRizeCooperation);
+    }
+
+    function httpGET(uri,callback){
+        var xhr = new XMLHttpRequest();
+        xhr.onreadystatechange = function(){
+            if(xhr.readyState == 4){
+                if(xhr.status == 200)
+                    callback.call(this,xhr.responseText);
+                else
+                    throw new Error(xhr.statusText)
+            }
+        };
+        xhr.open("GET",uri,true);
+        xhr.send(null);
+    }
+    liberator.commands.addUserCommand(['fetchflv'],'Download flv file from Nicovideo',
+        function(arg){
+            httpGET(arg || liberator.buffer.URL,function(responseText){
+                var [,title] = responseText.match(/<title>(.*?)<\/title>/i);
+                liberator.log(title);
+                NiconicoFlvHandler(arg || liberator.buffer.URL,title);
+            });
+        },{}
+    );
+})();