diff --git a/app/Exceptions/Handler.php b/app/Exceptions/Handler.php
index ef8d106a..bee624ec 100644
--- a/app/Exceptions/Handler.php
+++ b/app/Exceptions/Handler.php
@@ -46,6 +46,13 @@ class Handler extends ExceptionHandler
             $e = new NotFoundHttpException($e->getMessage(), $e);
         }
 
+        if ($e instanceof PrettyPageException && PHP_SAPI != "cli") {
+            echo \View::make('errors.e')->with('code', $e->getCode())
+                                        ->with('message', $e->getMessage())
+                                        ->render();
+            exit;
+        }
+
         if (config('app.debug')) {
             foreach ($this->dontReport as $type) {
                 if ($e instanceof $type) {
diff --git a/app/Exceptions/PrettyPageException.php b/app/Exceptions/PrettyPageException.php
new file mode 100644
index 00000000..e06f9c2b
--- /dev/null
+++ b/app/Exceptions/PrettyPageException.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace App\Exceptions;
+
+class PrettyPageException extends \Exception
+{
+
+}
diff --git a/app/Http/Controllers/AdminController.php b/app/Http/Controllers/AdminController.php
index 4b6c044b..2c4b2341 100644
--- a/app/Http/Controllers/AdminController.php
+++ b/app/Http/Controllers/AdminController.php
@@ -8,7 +8,7 @@ use App\Models\UserModel;
 use App\Models\Player;
 use App\Models\PlayerModel;
 use App\Models\Texture;
-use App\Exceptions\E;
+use App\Exceptions\PrettyPageException;
 use Validate;
 use Utils;
 use View;
@@ -135,7 +135,7 @@ class AdminController extends BaseController
         $cur_user = new User(session('uid'));
 
         if (!$user->is_registered)
-            throw new E('用户不存在', 1);
+            View::json('用户不存在', 1);
 
         if ($action == "email") {
             Validate::checkPost(['email']);
@@ -210,7 +210,7 @@ class AdminController extends BaseController
                 View::json('账号已被成功删除', 0);
 
         } else {
-            throw new E('非法参数', 1);
+            View::json('非法参数', 1);
         }
     }
 
@@ -263,7 +263,7 @@ class AdminController extends BaseController
             if (PlayerModel::where('pid', $_POST['pid'])->delete())
                 View::json('角色已被成功删除', 0);
         } else {
-            throw new E('非法参数', 1);
+            View::json('非法参数', 1);
         }
     }
 
diff --git a/app/Http/Controllers/AuthController.php b/app/Http/Controllers/AuthController.php
index bcd0ce40..d92a5e9e 100644
--- a/app/Http/Controllers/AuthController.php
+++ b/app/Http/Controllers/AuthController.php
@@ -5,7 +5,7 @@ namespace App\Http\Controllers;
 use Illuminate\Routing\Controller as BaseController;
 use App\Models\User;
 use App\Models\UserModel;
-use App\Exceptions\E;
+use App\Exceptions\PrettyPageException;
 use Validate;
 use Mail;
 use View;
@@ -76,7 +76,7 @@ class AuthController extends BaseController
 
             View::json('登出成功~', 0);
         } else {
-            throw new E('并没有有效的 session', 1);
+            View::json('并没有有效的 session', 1);
         }
     }
 
@@ -85,7 +85,7 @@ class AuthController extends BaseController
         if (Option::get('user_can_register') == 1) {
             return view('auth.register');
         } else {
-            throw new E('残念。。本皮肤站已经关闭注册咯 QAQ', 7, true);
+            throw new PrettyPageException('残念。。本皮肤站已经关闭注册咯 QAQ', 7);
         }
     }
 
@@ -137,7 +137,7 @@ class AuthController extends BaseController
         if ($_ENV['MAIL_HOST'] != "") {
             return view('auth.forgot');
         } else {
-            throw new E('本站已关闭重置密码功能', 8, true);
+            throw new PrettyPageException('本站已关闭重置密码功能', 8);
         }
     }
 
diff --git a/app/Http/Controllers/ClosetController.php b/app/Http/Controllers/ClosetController.php
index a4bd4b59..425dd207 100644
--- a/app/Http/Controllers/ClosetController.php
+++ b/app/Http/Controllers/ClosetController.php
@@ -7,7 +7,7 @@ use App\Models\User;
 use App\Models\Texture;
 use App\Models\Closet;
 use App\Models\ClosetModel;
-use App\Exceptions\E;
+use App\Exceptions\PrettyPageException;
 use View;
 use Option;
 
@@ -59,7 +59,7 @@ class ClosetController extends BaseController
     public function remove()
     {
         if (!is_numeric(\Utils::getValue('tid', $_POST)))
-            throw new E('非法参数', 1);
+            View::json('非法参数', 1);
 
         if ($this->closet->remove($_POST['tid'])) {
             $t = Texture::find($_POST['tid']);
diff --git a/app/Http/Controllers/PlayerController.php b/app/Http/Controllers/PlayerController.php
index a7e723ee..14f3d199 100644
--- a/app/Http/Controllers/PlayerController.php
+++ b/app/Http/Controllers/PlayerController.php
@@ -7,7 +7,7 @@ use App\Models\User;
 use App\Models\Player;
 use App\Models\PlayerModel;
 use App\Models\Texture;
-use App\Exceptions\E;
+use App\Exceptions\PrettyPageException;
 use Validate;
 use Utils;
 use Option;
@@ -87,7 +87,7 @@ class PlayerController extends BaseController
         $new_player_name = Utils::getValue('new_player_name', $_POST);
 
         if (!$new_player_name)
-            throw new E('非法参数', 1);
+            View::json('非法参数', 1);
 
         if (!Validate::playerName($new_player_name))
         {
@@ -114,7 +114,7 @@ class PlayerController extends BaseController
         $tid = Utils::getValue('tid', $_POST);
 
         if (!is_numeric($tid))
-            throw new E('非法参数', 1);
+            View::json('非法参数', 1);
 
         if (!($texture = Texture::find($tid)))
             View::json('Unexistent texture.', 6);
@@ -140,7 +140,7 @@ class PlayerController extends BaseController
         if (!isset($_POST['preference']) ||
             ($_POST['preference'] != "default" && $_POST['preference'] != "slim"))
         {
-            throw new E('非法参数', 1);
+            View::json('非法参数', 1);
         }
 
         $this->player->setPreference($_POST['preference']);
diff --git a/app/Http/Controllers/SkinlibController.php b/app/Http/Controllers/SkinlibController.php
index d689e8c1..471bd46f 100644
--- a/app/Http/Controllers/SkinlibController.php
+++ b/app/Http/Controllers/SkinlibController.php
@@ -5,7 +5,7 @@ namespace App\Http\Controllers;
 use Illuminate\Routing\Controller as BaseController;
 use App\Models\User;
 use App\Models\Texture;
-use App\Exceptions\E;
+use App\Exceptions\PrettyPageException;
 use Validate;
 use Option;
 use Utils;
diff --git a/app/Http/Controllers/TextureController.php b/app/Http/Controllers/TextureController.php
index e793f48c..d33e952c 100644
--- a/app/Http/Controllers/TextureController.php
+++ b/app/Http/Controllers/TextureController.php
@@ -8,7 +8,7 @@ use App\Events\GetAvatarPreview;
 use App\Models\User;
 use App\Models\Player;
 use App\Models\Texture;
-use App\Exceptions\E;
+use App\Exceptions\PrettyPageException;
 use Storage;
 use Minecraft;
 use Option;
diff --git a/app/Http/Controllers/UserController.php b/app/Http/Controllers/UserController.php
index 43aa9423..793dd11d 100644
--- a/app/Http/Controllers/UserController.php
+++ b/app/Http/Controllers/UserController.php
@@ -5,7 +5,7 @@ namespace App\Http\Controllers;
 use Illuminate\Routing\Controller as BaseController;
 use App\Models\User;
 use App\Models\Texture;
-use App\Exceptions\E;
+use App\Exceptions\PrettyPageException;
 use Utils;
 use View;
 
@@ -48,7 +48,7 @@ class UserController extends BaseController
     {
         // handle changing nickname
         if ($this->action == "nickname") {
-            if (!isset($_POST['new_nickname'])) throw new E('非法参数');
+            if (!isset($_POST['new_nickname'])) View::json('非法参数', 1);
 
             if (Utils::convertString($_POST['new_nickname']) != $_POST['new_nickname'])
                 View::json('无效的昵称。昵称中包含了奇怪的字符。', 1);
@@ -58,7 +58,7 @@ class UserController extends BaseController
         // handle changing password
         } elseif ($this->action == "password") {
             if (!(isset($_POST['current_password']) && isset($_POST['new_password'])))
-                throw new E('非法参数');
+                View::json('非法参数', 1);
 
             if (!$this->user->checkPasswd($_POST['current_password']))
                 View::json('原密码错误', 1);
@@ -70,7 +70,7 @@ class UserController extends BaseController
         // handle changing email
         } elseif ($this->action == "email") {
             if (!(isset($_POST['new_email']) && isset($_POST['password'])))
-                throw new E('非法参数');
+                View::json('非法参数', 1);
 
             if (!filter_var($_POST['new_email'], FILTER_VALIDATE_EMAIL)) {
                 View::json('邮箱格式错误', 3);
@@ -85,7 +85,7 @@ class UserController extends BaseController
         // handle deleting account
         } elseif ($this->action == "delete") {
             if (!isset($_POST['password']))
-                throw new E('非法参数');
+                View::json('非法参数', 1);
 
             if (!$this->user->checkPasswd($_POST['password']))
                 View::json('密码错误', 1);
@@ -109,17 +109,18 @@ class UserController extends BaseController
 
     public function setAvatar()
     {
-        if (!isset($_POST['tid'])) throw new E('Empty tid.');
+        if (!isset($_POST['tid']))
+            View::json('Empty tid.', 1);
 
         $result = Texture::find($_POST['tid']);
         if ($result) {
-            if ($result->type == "cape") throw new E('披风可不能设置为头像哦~', 1);
+            if ($result->type == "cape") View::json('披风可不能设置为头像哦~', 1);
 
             if ((new User(session('uid')))->setAvatar($_POST['tid'])) {
                 View::json('设置成功！', 0);
             }
         } else {
-            throw new E('材质不存在。', 1);
+            View::json('材质不存在。', 1);
         }
     }
 
diff --git a/app/Http/Middleware/CheckAuthenticated.php b/app/Http/Middleware/CheckAuthenticated.php
index 0afb5d5e..0dd8fe20 100644
--- a/app/Http/Middleware/CheckAuthenticated.php
+++ b/app/Http/Middleware/CheckAuthenticated.php
@@ -4,7 +4,7 @@ namespace App\Http\Middleware;
 
 use App\Models\User;
 use App\Models\UserModel;
-use App\Exceptions\E;
+use App\Exceptions\PrettyPageException;
 use View;
 use Http;
 use Session;
@@ -31,7 +31,7 @@ class CheckAuthenticated
                 Session::flush();
                 Session::save();
 
-                throw new E('你已经被本站封禁啦，请联系管理员解决', 5, true);
+                throw new PrettyPageException('你已经被本站封禁啦，请联系管理员解决', 5);
             }
 
             // ask for filling email
diff --git a/app/Http/Middleware/CheckPostMiddleware.php b/app/Http/Middleware/CheckPostMiddleware.php
index 42de6e2d..3f01d880 100644
--- a/app/Http/Middleware/CheckPostMiddleware.php
+++ b/app/Http/Middleware/CheckPostMiddleware.php
@@ -2,7 +2,7 @@
 
 namespace App\Http\Middleware;
 
-use App\Exceptions\E;
+use App\Exceptions\PrettyPageException;
 use Validate;
 use Utils;
 use View;
diff --git a/app/Models/Closet.php b/app/Models/Closet.php
index f7c860c6..1f045355 100644
--- a/app/Models/Closet.php
+++ b/app/Models/Closet.php
@@ -2,8 +2,9 @@
 
 namespace App\Models;
 
-use App\Exceptions\E;
+use App\Exceptions\PrettyPageException;
 use Utils;
+use View;
 
 class Closet
 {
@@ -93,7 +94,7 @@ class Closet
     {
         foreach ($this->textures as $item) {
             if ($item['tid'] == $tid)
-                throw new E('你已经收藏过这个材质啦', 1);
+                View::json('你已经收藏过这个材质啦', 1);
         }
 
         $this->textures[] = array(
@@ -137,7 +138,7 @@ class Closet
             $offset++;
         }
 
-        throw new E('The texture is not in the closet.', 1);
+        View::json('The texture is not in the closet.', 1);
     }
 
     private function checkTextureExist($tid)
diff --git a/app/Models/Player.php b/app/Models/Player.php
index c8a5ba68..a3abbcf7 100644
--- a/app/Models/Player.php
+++ b/app/Models/Player.php
@@ -4,9 +4,10 @@ namespace App\Models;
 
 use App\Events\PlayerProfileUpdated;
 use App\Events\GetPlayerJson;
-use App\Exceptions\E;
+use App\Exceptions\PrettyPageException;
 use Event;
 use Utils;
+use View;
 
 class Player
 {
@@ -68,7 +69,7 @@ class Player
     {
         if (!isset($tids['tid_steve']) && !isset($tids['tid_alex']) && !isset($tids['tid_cape']))
         {
-            throw new E('非法参数', 1);
+            View::json('非法参数', 1);
         }
 
         $this->model->tid_steve = isset($tids['tid_steve']) ? $tids['tid_steve'] : $this->model['tid_steve'];
@@ -144,7 +145,7 @@ class Player
         if ($api_type == self::CSL_API || $api_type == self::USM_API) {
             return \Storage::disk('cache')->get("json/{$this->pid}-{$api_type}");
         } else {
-            throw new E('不支持的 API_TYPE。', -1, true);
+            throw new PrettyPageException('不支持的 API_TYPE。', -1);
         }
     }
 
diff --git a/app/Providers/BootServiceProvider.php b/app/Providers/BootServiceProvider.php
index e34dfd6a..b8036616 100644
--- a/app/Providers/BootServiceProvider.php
+++ b/app/Providers/BootServiceProvider.php
@@ -3,7 +3,7 @@
 namespace App\Providers;
 
 use Illuminate\Support\ServiceProvider;
-use App\Exceptions\E;
+use App\Exceptions\PrettyPageException;
 
 class BootServiceProvider extends ServiceProvider
 {
@@ -15,10 +15,18 @@ class BootServiceProvider extends ServiceProvider
     public function boot()
     {
         \View::addExtension('tpl', 'blade');
+        $this->checkFileExists();
         $this->checkDbConfig();
         $this->checkInstallation();
     }
 
+    protected function checkFileExists()
+    {
+        if (!file_exists(BASE_DIR."/.env")) {
+            throw new PrettyPageException('.env 文件不存在', -1);
+        }
+    }
+
     protected function checkDbConfig()
     {
         // use error control to hide shitty connect warnings
@@ -31,7 +39,7 @@ class BootServiceProvider extends ServiceProvider
         );
 
         if ($conn->connect_error)
-            throw new E("无法连接至 MySQL 服务器，请检查你的配置：".$conn->connect_error, $conn->connect_errno, true);
+            throw new PrettyPageException("无法连接至 MySQL 服务器，请检查你的配置：".$conn->connect_error, $conn->connect_errno);
 
         return true;
     }
@@ -44,7 +52,7 @@ class BootServiceProvider extends ServiceProvider
 
         if (!is_dir(BASE_DIR.'/storage/textures/')) {
             if (!mkdir(BASE_DIR.'/storage/textures/'))
-                throw new E('textures 文件夹创建失败，请确认目录权限是否正确，或者手动放置一个。', -1);
+                throw new PrettyPageException('textures 文件夹创建失败，请确认目录权限是否正确，或者手动放置一个。', -1);
         }
 
         if (config('app.version') != \Option::get('version', '')) {
diff --git a/app/Services/Database/Database.php b/app/Services/Database/Database.php
index cf047f41..284a6e5f 100644
--- a/app/Services/Database/Database.php
+++ b/app/Services/Database/Database.php
@@ -2,13 +2,10 @@
 
 namespace App\Services\Database;
 
-use \App\Exceptions\E;
-use \Blessing\Config;
-
 /**
  * Light-weight database helper
  *
- * @author  <h@prinzeugen.net>
+ * @author <h@prinzeugen.net>
  */
 class Database
 {
@@ -52,7 +49,7 @@ class Database
         );
 
         if ($this->connection->connect_error)
-            throw new E("Could not connect to MySQL database. Check your configuration:".
+            throw new \InvalidArgumentException("Could not connect to MySQL database. Check your configuration:".
                 $this->connection->connect_error, $this->connection->connect_errno, true);
 
         $this->connection->query("SET names 'utf8'");
@@ -75,7 +72,7 @@ class Database
 
         $result = $this->connection->query($sql);
         if ($this->connection->error)
-            throw new E("Database query error: ".$this->connection->error.", Statement: ".$sql, -1);
+            throw new \Exception("Database query error: ".$this->connection->error.", Statement: ".$sql, -1);
 
         return $result;
     }
@@ -90,9 +87,9 @@ class Database
      *
      * @param  string  $key
      * @param  string  $value
-     * @param  array   $condition, see function `where`
-     * @param  string  $table, which table to operate
-     * @param  boolean $dont_fetch_array, return resources if true
+     * @param  array   $condition        See function `where`
+     * @param  string  $table            Which table to operate
+     * @param  bool    $dont_fetch_array Return resources if true
      * @return array|resources
      */
     public function select($key, $value, $condition = null, $table = null, $dont_fetch_array = false)
@@ -173,7 +170,7 @@ class Database
     /**
      * Generate where statement
      *
-     * @param  array $condition, e.g. array('where'=>'username="shit"', 'limit'=>10, 'order'=>'uid')
+     * @param  array $condition e.g. array('where'=>'username="shit"', 'limit'=>10, 'order'=>'uid')
      * @return string
      */
     private function where($condition)
diff --git a/app/Services/Utils.php b/app/Services/Utils.php
index d04ff634..b99d8f3b 100644
--- a/app/Services/Utils.php
+++ b/app/Services/Utils.php
@@ -2,7 +2,7 @@
 
 namespace App\Services;
 
-use App\Exceptions\E;
+use App\Exceptions\PrettyPageException;
 use Storage;
 
 class Utils
diff --git a/app/Services/Validate.php b/app/Services/Validate.php
index 0d5bdf4a..53287215 100644
--- a/app/Services/Validate.php
+++ b/app/Services/Validate.php
@@ -2,7 +2,8 @@
 
 namespace App\Services;
 
-use App\Exceptions\E;
+use App\Exceptions\PrettyPageException;
+use View;
 
 class Validate
 {
@@ -17,7 +18,7 @@ class Validate
         foreach ($keys as $key) {
             if (!isset($_POST[$key])) {
                 if ($silent) return false;
-                throw new E('非法参数', 1);
+                View::json('非法参数', 1);
             }
         }
         return true;
@@ -43,9 +44,9 @@ class Validate
     public static function textureName($texture_name)
     {
         if (strlen($texture_name) > 32 || strlen($texture_name) < 1) {
-            throw new E('无效的材质名称。材质名长度应该小于 32。', 2);
+            View::json('无效的材质名称。材质名长度应该小于 32。', 2);
         } else if (Utils::convertString($texture_name) != $texture_name) {
-            throw new E('无效的材质名称。材质名称中包含了奇怪的字符。', 2);
+            View::json('无效的材质名称。材质名称中包含了奇怪的字符。', 2);
         }
         return true;
     }
@@ -54,10 +55,10 @@ class Validate
     {
         if (strlen($password) > 16 || strlen($password) < 8) {
             if ($silent) return false;
-            throw new E('无效的密码。密码长度应该大于 8 并小于 16。', 2);
+            View::json('无效的密码。密码长度应该大于 8 并小于 16。', 2);
         } else if (Utils::convertString($password) != $password) {
             if ($silent) return false;
-            throw new E('无效的密码。密码中包含了奇怪的字符。', 2);
+            View::json('无效的密码。密码中包含了奇怪的字符。', 2);
         }
         return true;
     }