diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index eeed58b5e..da29d269f 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.hippo.ehviewer"
-    android:versionCode="14"
-    android:versionName="0.4.4" >
+    android:versionCode="15"
+    android:versionName="0.4.0" >
     
     <uses-sdk
         android:minSdkVersion="14"
diff --git a/bin/AndroidManifest.xml b/bin/AndroidManifest.xml
index eeed58b5e..da29d269f 100644
--- a/bin/AndroidManifest.xml
+++ b/bin/AndroidManifest.xml
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.hippo.ehviewer"
-    android:versionCode="14"
-    android:versionName="0.4.4" >
+    android:versionCode="15"
+    android:versionName="0.4.0" >
     
     <uses-sdk
         android:minSdkVersion="14"
diff --git a/bin/EhViewer.apk b/bin/EhViewer.apk
index dd129b6cc..012007c21 100644
Binary files a/bin/EhViewer.apk and b/bin/EhViewer.apk differ
diff --git a/bin/classes.dex b/bin/classes.dex
index c44803af7..b59d5dd5e 100644
Binary files a/bin/classes.dex and b/bin/classes.dex differ
diff --git a/bin/resources.ap_ b/bin/resources.ap_
index e3de1f7cc..ea55322cb 100644
Binary files a/bin/resources.ap_ and b/bin/resources.ap_ differ
diff --git a/res/raw/change_log b/res/raw/change_log
index b89bdb06e..8e8edc75d 100644
--- a/res/raw/change_log
+++ b/res/raw/change_log
@@ -1,3 +1,6 @@
+Version 0.4.5 (2014-??-??)
+* 添加更新服务器
+
 Version 0.4.4 (2014-04-06)
 * 修复错误的日志输出导致的崩溃
 
diff --git a/res/values-zh-rCN/strings.xml b/res/values-zh-rCN/strings.xml
index c4fbf12b7..e26053c67 100644
--- a/res/values-zh-rCN/strings.xml
+++ b/res/values-zh-rCN/strings.xml
@@ -155,6 +155,7 @@
     <!-- server -->
     <string name="update_server_google">Google</string>
     <string name="update_server_qiniu">七牛</string>
+    <string name="update_server_gokuai">够快</string>
     
     <!-- Tag -->
     <string name="add_tag">添加标签</string>
diff --git a/res/values/array.xml b/res/values/array.xml
index 5972d1fc1..a967a9228 100644
--- a/res/values/array.xml
+++ b/res/values/array.xml
@@ -78,11 +78,13 @@
     <string-array name="preference_update_server_entries">
         <item>@string/update_server_google</item>
         <item>@string/update_server_qiniu</item>
+        <item>@string/update_server_gokuai</item>
     </string-array>
     
     <string-array name="preference_update_server_entry_values" translatable="false">
         <item>0</item>
         <item>1</item>
+        <item>2</item>
     </string-array>
     
     
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 13dd8335a..22ba154bb 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -162,6 +162,7 @@
     <!-- server -->
     <string name="update_server_google">Google</string>
     <string name="update_server_qiniu">Qiniu</string>
+    <string name="update_server_gokuai">Gokuai</string>
     
     <!-- Tag -->
     <string name="add_tag">Add tag</string>
diff --git a/src/com/hippo/ehviewer/network/HttpHelper.java b/src/com/hippo/ehviewer/network/HttpHelper.java
index a1d44f3db..bce593da2 100644
--- a/src/com/hippo/ehviewer/network/HttpHelper.java
+++ b/src/com/hippo/ehviewer/network/HttpHelper.java
@@ -93,7 +93,13 @@ public class HttpHelper {
             String encoding = conn.getContentEncoding();
             if (encoding != null && encoding.equals("gzip"))
                 is = new GZIPInputStream(is);
-            baos = new ByteArrayOutputStream();
+            
+            int length = conn.getContentLength();
+            if (length >= 0)
+                baos = new ByteArrayOutputStream(length);
+            else
+                baos = new ByteArrayOutputStream();
+            
             Util.copy(is, baos, Constant.BUFFER_SIZE);
             
             // Get charset
diff --git a/src/com/hippo/ehviewer/service/DownloadService.java b/src/com/hippo/ehviewer/service/DownloadService.java
index 137d6cf0b..ea31d9f64 100644
--- a/src/com/hippo/ehviewer/service/DownloadService.java
+++ b/src/com/hippo/ehviewer/service/DownloadService.java
@@ -11,6 +11,7 @@ import com.hippo.ehviewer.util.Download;
 import com.hippo.ehviewer.util.EhClient;
 import com.hippo.ehviewer.util.EhClient.DownloadMangaManager;
 
+import android.app.Notification;
 import android.app.NotificationManager;
 import android.app.PendingIntent;
 import android.app.Service;
@@ -18,7 +19,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.os.Binder;
 import android.os.IBinder;
-import android.support.v4.app.NotificationCompat;
+
 import com.hippo.ehviewer.util.Log;
 
 public class DownloadService extends Service {
@@ -34,7 +35,6 @@ public class DownloadService extends Service {
     private ServiceBinder mBinder = null;
     
     private NotificationManager mNotifyManager;
-    private NotificationCompat.Builder mBuilder;
     
     private DownloadMangaManager downloadMangaManager;
     
@@ -47,12 +47,6 @@ public class DownloadService extends Service {
         mBinder = new ServiceBinder();
         mNotifyManager = (NotificationManager)
                 getSystemService(Context.NOTIFICATION_SERVICE);
-        mBuilder = new NotificationCompat.Builder(this);
-        mBuilder.setSmallIcon(R.drawable.ic_launcher);
-        
-        Intent intent = new Intent(DownloadService.this,DownloadActivity.class);  
-        PendingIntent pendingIntent = PendingIntent.getActivity(DownloadService.this, 1, intent, PendingIntent.FLAG_UPDATE_CURRENT);  
-        mBuilder.setContentIntent(pendingIntent);  
         
         downloadMangaManager = mAppContext.getEhClient().new DownloadMangaManager();
         
@@ -60,10 +54,12 @@ public class DownloadService extends Service {
         downloadMangaManager.setOnDownloadMangaListener(new EhClient.OnDownloadMangaListener() {
             @Override
             public void onDownloadMangaAllStart() {
-                mBuilder.setContentTitle(getString(R.string.start_download_task))
+                Notification.Builder builder = new Notification.Builder(getApplicationContext());
+                setNotification(builder);
+                builder.setContentTitle(getString(R.string.start_download_task))
                         .setContentText(null)
-                        .setProgress(0, 0, true).setOngoing(true).setAutoCancel(false);;
-                mNotifyManager.notify(DOWNLOAD_NOTIFY_ID, mBuilder.build());
+                        .setProgress(0, 0, true).setOngoing(true).setAutoCancel(false);
+                mNotifyManager.notify(DOWNLOAD_NOTIFY_ID, builder.getNotification());
             }
             
             @Override
@@ -78,11 +74,13 @@ public class DownloadService extends Service {
                 if (di == null)
                     mNotifyManager.cancel(DOWNLOAD_NOTIFY_ID);
                 else {
-                    mBuilder.setContentTitle(getString(R.string.downloading)
+                    Notification.Builder builder = new Notification.Builder(getApplicationContext());
+                    setNotification(builder);
+                    builder.setContentTitle(getString(R.string.downloading)
                         + " " + di.title)
                         .setContentText(null)
-                        .setProgress(0, 0, true).setOngoing(true).setAutoCancel(false);;
-                mNotifyManager.notify(DOWNLOAD_NOTIFY_ID, mBuilder.build());
+                        .setProgress(0, 0, true).setOngoing(true).setAutoCancel(false);
+                    mNotifyManager.notify(DOWNLOAD_NOTIFY_ID, builder.getNotification());
                 }
             }
             
@@ -92,12 +90,14 @@ public class DownloadService extends Service {
                 if (di == null)
                     mNotifyManager.cancel(DOWNLOAD_NOTIFY_ID);
                 else {
-                    mBuilder.setContentTitle(getString(R.string.downloading)
+                    Notification.Builder builder = new Notification.Builder(getApplicationContext());
+                    setNotification(builder);
+                    builder.setContentTitle(getString(R.string.downloading)
                             + " " + di.title)
                             .setContentText(startIndex + " / " + pageSum)
                             .setProgress(pageSum, startIndex, false).setOngoing(true)
                             .setAutoCancel(false);
-                    mNotifyManager.notify(DOWNLOAD_NOTIFY_ID, mBuilder.build());
+                    mNotifyManager.notify(DOWNLOAD_NOTIFY_ID, builder.getNotification());
                     mNotifyManager.cancel(Integer.parseInt(id));
                 }
             }
@@ -118,9 +118,11 @@ public class DownloadService extends Service {
                 DownloadInfo di = Download.get(id);
                 if (di != null)
                     mesg += Download.get(id).title;
-                mBuilder.setContentTitle(mesg);
-                mBuilder.setContentText(null).setProgress(0, 0, false).setOngoing(false);
-                mNotifyManager.notify(Integer.parseInt(id), mBuilder.build());
+                Notification.Builder builder = new Notification.Builder(getApplicationContext());
+                setNotification(builder);
+                builder.setContentTitle(mesg);
+                builder.setContentText(null).setProgress(0, 0, false).setOngoing(false);
+                mNotifyManager.notify(Integer.parseInt(id), builder.getNotification());
             }
             
             @Override
@@ -129,12 +131,14 @@ public class DownloadService extends Service {
                 if (di == null)
                     mNotifyManager.cancel(DOWNLOAD_NOTIFY_ID);
                 else {
-                    mBuilder.setContentTitle(getString(R.string.downloading)
+                    Notification.Builder builder = new Notification.Builder(getApplicationContext());
+                    setNotification(builder);
+                    builder.setContentTitle(getString(R.string.downloading)
                             + " " + di.title)
                             .setContentText(index + " / " + pageSum)
                             .setProgress(pageSum, index, false).setOngoing(true)
                             .setAutoCancel(false);
-                    mNotifyManager.notify(DOWNLOAD_NOTIFY_ID, mBuilder.build());
+                    mNotifyManager.notify(DOWNLOAD_NOTIFY_ID, builder.getNotification());
                 }
             }
 
@@ -145,8 +149,17 @@ public class DownloadService extends Service {
                 
             }
         });
-    }  
-  
+    }
+    
+    private void setNotification(Notification.Builder builder) {
+        
+        builder.setSmallIcon(R.drawable.ic_launcher);
+        
+        Intent intent = new Intent(DownloadService.this,DownloadActivity.class);  
+        PendingIntent pendingIntent = PendingIntent.getActivity(DownloadService.this, 1, intent, PendingIntent.FLAG_UPDATE_CURRENT);  
+        builder.setContentIntent(pendingIntent);  
+    }
+    
     @Override  
     public int onStartCommand(Intent intent, int flags, int startId) {
         Log.d(TAG, "Service onStartCommand");
@@ -170,7 +183,6 @@ public class DownloadService extends Service {
         
         mBinder = null;
         mNotifyManager = null;
-        mBuilder = null;
     }
     
     public void add(String gid, String thumb, String detailUrlStr, String title) {
diff --git a/src/com/hippo/ehviewer/util/Config.java b/src/com/hippo/ehviewer/util/Config.java
index 04a9e32ee..b9f2f8612 100644
--- a/src/com/hippo/ehviewer/util/Config.java
+++ b/src/com/hippo/ehviewer/util/Config.java
@@ -202,11 +202,11 @@ public class Config {
             mConfigPre.edit().putString(UPDATE_SERVER, UPDATE_SERVER_DEFAULT)
                     .apply();
         }
-        
         switch (value) {
         case 1:
             return "qiniu";
-        
+        case 2:
+            return "gokuai";
         case 0:
         default:
             return "google";
diff --git a/src/com/hippo/ehviewer/util/EhClient.java b/src/com/hippo/ehviewer/util/EhClient.java
index eb267b49d..3662f8898 100644
--- a/src/com/hippo/ehviewer/util/EhClient.java
+++ b/src/com/hippo/ehviewer/util/EhClient.java
@@ -1002,6 +1002,7 @@ public class EhClient {
                 Log.d(TAG, "Download image " + url);
 
                 HttpURLConnection conn = null;
+                ByteArrayOutputStream baos = null;
                 try {
                     URL url = new URL(this.url);
                     conn = (HttpURLConnection) url.openConnection();
@@ -1010,7 +1011,12 @@ public class EhClient {
                     conn.connect();
                     InputStream is = conn.getInputStream();
                     if (diskCache != null) {
-                        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+                        
+                        int length = conn.getContentLength();
+                        if (length >= 0)
+                            baos = new ByteArrayOutputStream(length);
+                        else
+                            baos = new ByteArrayOutputStream();
                         Util.copy(is, baos);
                         byte[] bytes = baos.toByteArray();
                         // To disk cache
@@ -1057,6 +1063,8 @@ public class EhClient {
                 } finally {
                     if (conn != null)
                         conn.disconnect();
+                    if (baos != null)
+                        Util.closeStreamQuietly(baos);
                 }
                 sendMessage(res, errorMessageId);
             }