use java reflection to make a lite-restful handler

2025-10-31 02:16:18 +08:00 · 2016-03-03 01:37:47 +08:00
parent 4827621cc2
commit d81e9398b3
22 changed files with 446 additions and 771 deletions
--- a/src/main/java/love/sola/netsupport/api/API.java
+++ b/src/main/java/love/sola/netsupport/api/API.java
@@ -0,0 +1,32 @@
+package love.sola.netsupport.api;
+
+import love.sola.netsupport.enums.Access;
+import love.sola.netsupport.wechat.Command;
+import me.chanjar.weixin.common.session.WxSession;
+
+import javax.servlet.http.HttpServletRequest;
+
+/**
+ * ***********************************************
+ * Created by Sola on 2016/2/27.
+ * Don't modify this source without my agreement
+ * ***********************************************
+ */
+public abstract class API {
+
+	public String url = null; //url
+	public int access = Access.GOD_MODE; //operator's permission
+	public Command authorize = null; //session check
+
+	protected abstract Object process(HttpServletRequest req, WxSession session) throws Exception;
+
+	@Override
+	public String toString() {
+		return getClass().getSimpleName() + "{" +
+				"url='" + url + '\'' +
+				", access=" + Access.inverseMap.get(access) +
+				", authorize=" + authorize +
+				'}';
+	}
+
+}
--- a/src/main/java/love/sola/netsupport/api/APIRouter.java
+++ b/src/main/java/love/sola/netsupport/api/APIRouter.java
@@ -0,0 +1,127 @@
+package love.sola.netsupport.api;
+
+import com.google.common.reflect.ClassPath;
+import com.google.gson.Gson;
+import love.sola.netsupport.enums.Access;
+import love.sola.netsupport.enums.Attribute;
+import love.sola.netsupport.pojo.Operator;
+import love.sola.netsupport.pojo.User;
+import love.sola.netsupport.sql.SQLCore;
+import love.sola.netsupport.wechat.WechatSession;
+import me.chanjar.weixin.common.session.WxSession;
+import org.hibernate.HibernateException;
+
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.text.ParseException;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * ***********************************************
+ * Created by Sola on 2016/2/27.
+ * Don't modify this source without my agreement
+ * ***********************************************
+ */
+@WebServlet(name = "APIRouter", urlPatterns = "/api/*", loadOnStartup = 11)
+public class APIRouter extends HttpServlet {
+
+	protected static Gson gson = SQLCore.gson;
+	private Map<String, API> nodes = new HashMap<>();
+
+	public APIRouter() {
+		try {
+			ClassPath path = ClassPath.from(getClass().getClassLoader());
+			Set<ClassPath.ClassInfo> classes = path.getTopLevelClassesRecursive(getClass().getPackage().getName());
+			for (ClassPath.ClassInfo info : classes) {
+				Class<?> clz = info.load();
+				if (!API.class.equals(clz) && API.class.isAssignableFrom(clz)) {
+					try {
+						System.out.print("Loading API: " + clz.getName());
+						API obj = (API) clz.newInstance();
+						System.out.println("Registered API: " + obj);
+						nodes.put(obj.url, obj);
+					} catch (InstantiationException | IllegalAccessException e) {
+						e.printStackTrace();
+					}
+				}
+			}
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+		System.out.println("Total " + nodes.size() + " API(s) loaded.");
+	}
+
+	@Override
+	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+		req.setCharacterEncoding("utf-8");
+		resp.setCharacterEncoding("utf-8");
+		resp.addHeader("Content-type", "application/json;charset=utf-8");
+		resp.addHeader("Access-Control-Allow-Origin", "*");
+		Object obj = null;
+		try {
+			API api = nodes.get(req.getRequestURI());
+			if (api == null) {
+				resp.sendError(HttpServletResponse.SC_FORBIDDEN);
+				return;
+			}
+			WxSession session = getSession(req);
+			if (session == null) {
+				obj = Error.UNAUTHORIZED;
+				return;
+			}
+			if (api.authorize != null) {
+				if (session.getAttribute(Attribute.AUTHORIZED) != api.authorize) {
+					obj = Error.UNAUTHORIZED;
+					return;
+				}
+				if (api.access == Access.USER) {
+					User u = (User) session.getAttribute(Attribute.USER);
+					if (u == null) {
+						obj = Error.UNAUTHORIZED;
+						return;
+					}
+				}
+				if (api.access < Access.USER) {
+					Operator op = (Operator) session.getAttribute(Attribute.OPERATOR);
+					if (op == null) {
+						obj = Error.UNAUTHORIZED;
+						return;
+					}
+					if (op.getAccess() > api.access) {
+						obj = Error.PERMISSION_DENIED;
+						return;
+					}
+				}
+			}
+			obj = api.process(req, session);
+		} catch (ParseException | NumberFormatException e) {
+			obj = Error.ILLEGAL_PARAMETER;
+		} catch (HibernateException e) {
+			e.printStackTrace();
+			obj = Error.DATABASE_ERROR;
+		} catch (Exception e) {
+			e.printStackTrace();
+			obj = Error.INTERNAL_ERROR;
+		} finally {
+			if (!resp.isCommitted()) {
+				try (PrintWriter out = resp.getWriter()) {
+					out.println(gson.toJson(obj));
+				}
+			}
+		}
+	}
+
+	private static WxSession getSession(HttpServletRequest req) {
+		String t = req.getParameter("token");
+		if (t == null || t.isEmpty()) return null;
+		return WechatSession.get(t, false);
+	}
+
+}
--- a/src/main/java/love/sola/netsupport/api/CheckSession.java
+++ b/src/main/java/love/sola/netsupport/api/CheckSession.java
@@ -1,19 +1,10 @@
 package love.sola.netsupport.api;

-import com.google.gson.Gson;
+import love.sola.netsupport.enums.Access;
 import love.sola.netsupport.enums.Attribute;
-import love.sola.netsupport.sql.SQLCore;
-import love.sola.netsupport.util.ParseUtil;
-import love.sola.netsupport.wechat.WechatSession;
 import me.chanjar.weixin.common.session.WxSession;

-import javax.servlet.ServletException;
-import javax.servlet.annotation.WebServlet;
-import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-import java.io.IOException;
-import java.io.PrintWriter;
 import java.util.HashMap;
 import java.util.Map;

@@ -23,44 +14,28 @@ import java.util.Map;
 * Don't modify this source without my agreement
 * ***********************************************
 */
-@WebServlet(name = "CheckSession", urlPatterns = "/api/checksession", loadOnStartup = 11)
-public class CheckSession extends HttpServlet {
+public class CheckSession extends API {

-	private Gson gson = SQLCore.gson;
-
-	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		doGet(request, response);
+	public CheckSession() {
+		url = "/api/checksession";
+		access = Access.GUEST;
+		authorize = null;
 	}

-	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		request.setCharacterEncoding("utf-8");
-		response.setCharacterEncoding("utf-8");
-		response.addHeader("Content-type", "application/json;charset=utf-8");
-		PrintWriter out = response.getWriter();
-		String json = gson.toJson(check(request));
-		out.println(ParseUtil.parseJsonP(request, json));
-		out.close();
-	}
-
-	private Response check(HttpServletRequest request) {
-		String t = request.getParameter("token");
-		if (t == null || t.isEmpty()) return new Response(Response.ResponseCode.UNAUTHORIZED);
-		WxSession s = WechatSession.get(t, false);
-		if (s == null) return new Response(Response.ResponseCode.UNAUTHORIZED);
-		String more = request.getParameter("more");
+	@Override
+	protected Object process(HttpServletRequest req, WxSession session) throws Exception {
+		String more = req.getParameter("more");
 		Map<String, Object> result = new HashMap<>();
-		result.put(Attribute.AUTHORIZED, s.getAttribute(Attribute.AUTHORIZED));
-		if (more != null){
+		result.put(Attribute.AUTHORIZED, session.getAttribute(Attribute.AUTHORIZED));
+		if (more != null) {
 			switch (more) {
 				case "1":
-					result.put(Attribute.USER, s.getAttribute(Attribute.USER));
-					result.put(Attribute.OPERATOR, s.getAttribute(Attribute.OPERATOR));
+					result.put(Attribute.USER, session.getAttribute(Attribute.USER));
+					result.put(Attribute.OPERATOR, session.getAttribute(Attribute.OPERATOR));
 					break;
 			}
 		}
-		return new Response(Response.ResponseCode.OK, result);
+		return result;
 	}

-
-
 }
--- a/src/main/java/love/sola/netsupport/api/Error.java
+++ b/src/main/java/love/sola/netsupport/api/Error.java
@@ -0,0 +1,45 @@
+package love.sola.netsupport.api;
+
+import static love.sola.netsupport.config.Lang.lang;
+
+/**
+ * ***********************************************
+ * Created by Sola on 2015/11/5.
+ * Don't modify this source without my agreement
+ * ***********************************************
+ */
+public class Error {
+
+	public static final Error ALREADY_SUBMITTED = new Error(1);
+	public static final Error OK = new Error(0);
+	public static final Error PARAMETER_REQUIRED = new Error(-1);
+	public static final Error ILLEGAL_PARAMETER = new Error(-2);
+	public static final Error REQUEST_FAILED = new Error(-3);
+	public static final Error LENGTH_LIMIT_EXCEEDED = new Error(-4);
+	public static final Error INVALID_PARAMETER = new Error(-5);
+	public static final Error USER_NOT_FOUND = new Error(-11);
+	public static final Error TICKET_NOT_FOUND = new Error(-12);
+	public static final Error OPERATOR_NOT_FOUND = new Error(-13);
+	public static final Error UNAUTHORIZED = new Error(-20);
+	public static final Error WRONG_PASSWORD = new Error(-22);
+	public static final Error PERMISSION_DENIED = new Error(-24);
+	public static final Error INTERNAL_ERROR = new Error(-90);
+	public static final Error DATABASE_ERROR = new Error(-91);
+
+	public int errCode;
+	public String errMsg;
+
+	private Error(int code) {
+		this(code, lang("ERR_" + code));
+	}
+
+	public Error(int errCode, String errMsg) {
+		this.errCode = errCode;
+		this.errMsg = errMsg;
+	}
+
+	public Error withMsg(String msg) {
+		return new Error(errCode, msg);
+	}
+
+}
--- a/src/main/java/love/sola/netsupport/api/Login.java
+++ b/src/main/java/love/sola/netsupport/api/Login.java
@@ -49,19 +49,19 @@ public class Login extends HttpServlet {
 		out.close();
 	}

-	private Response login(HttpServletRequest request) {
+	private Object login(HttpServletRequest request) {
 		try {
 			int oid = Integer.parseInt(request.getParameter("id"));
 			String password = request.getParameter("pass");
 			boolean bypass = request.getParameter("bypass") != null;
 			Operator op = TableOperator.get(oid);
 			if (op == null)
-				return new Response(Response.ResponseCode.OPERATOR_NOT_FOUND);
-			else if (op.getAccess() == Access.NOLOGIN)
-				return new Response(Response.ResponseCode.PERMISSION_DENIED);
+				return Error.OPERATOR_NOT_FOUND;
+			else if (op.getAccess() >= Access.NO_LOGIN)
+				return Error.PERMISSION_DENIED;

 			if (!Crypto.check(bypass ? password : RSAUtil.decrypt(password), op.getPassword())) {
-				return new Response(Response.ResponseCode.WRONG_PASSWORD);
+				return Error.WRONG_PASSWORD;
 			}

 			String sid = WechatSession.genId();
@@ -83,10 +83,10 @@ public class Login extends HttpServlet {
 			if (request.getParameter("bypasswechat") != null) {
 				session.setAttribute(Attribute.WECHAT, request.getParameter("bypasswechat"));
 			}
-
-			return new Response(Response.ResponseCode.OK, sid);
+			return sid;
 		} catch (Exception e) {
-			return new Response(Response.ResponseCode.REQUEST_FAILED, e);
+			e.printStackTrace();
+			return Error.REQUEST_FAILED;
 		}
 	}
 }
--- a/src/main/java/love/sola/netsupport/api/Response.java
+++ b/src/main/java/love/sola/netsupport/api/Response.java
@@ -1,75 +0,0 @@
-package love.sola.netsupport.api;
-
-import lombok.AllArgsConstructor;
-
-import java.util.HashMap;
-import java.util.Map;
-
-/**
- * ***********************************************
- * Created by Sola on 2015/11/5.
- * Don't modify this source without my agreement
- * ***********************************************
- */
-@AllArgsConstructor
-public class Response {
-
-	public int code;
-	public String info;
-	public Object result;
-
-	public Response(ResponseCode code) {
-		this(code, null);
-	}
-
-	public Response(ResponseCode code, Object result) {
-		this.code = code.id;
-		this.info = code.name();
-		this.result = result;
-	}
-
-
-	public enum ResponseCode {
-
-		ALREADY_SUBMITTED(1),
-		OK(0),
-		PARAMETER_REQUIRED(-1),
-		ILLEGAL_PARAMETER(-2),
-		REQUEST_FAILED(-3),
-		LENGTH_LIMIT_EXCEEDED(-4),
-		USER_NOT_FOUND(-11),
-		TICKET_NOT_FOUND(-12),
-		OPERATOR_NOT_FOUND(-13),
-		UNAUTHORIZED(-20),
-		WRONG_PASSWORD(-22),
-		PERMISSION_DENIED(-24),
-		INTERNAL_ERROR(-90),
-		DATABASE_ERROR(-91),
-		;
-
-		private static final Map<Integer, ResponseCode> ID_MAP = new HashMap<>();
-
-		static {
-			for (ResponseCode type : values()) {
-				ID_MAP.put(type.id, type);
-			}
-		}
-
-		public final int id;
-
-		ResponseCode(int id) {
-			this.id = id;
-		}
-
-		public static ResponseCode fromId(int id) {
-			return ID_MAP.get(id);
-		}
-
-		@Override
-		public String toString() {
-			return name();
-		}
-
-	}
-
-}
--- a/src/main/java/love/sola/netsupport/api/manager/GetUser.java
+++ b/src/main/java/love/sola/netsupport/api/manager/GetUser.java
@@ -1,26 +1,14 @@
 package love.sola.netsupport.api.manager;

-import com.google.gson.Gson;
-import love.sola.netsupport.api.Response;
+import love.sola.netsupport.api.API;
+import love.sola.netsupport.api.Error;
 import love.sola.netsupport.enums.Access;
-import love.sola.netsupport.enums.Attribute;
-import love.sola.netsupport.pojo.Operator;
 import love.sola.netsupport.pojo.User;
-import love.sola.netsupport.sql.SQLCore;
 import love.sola.netsupport.sql.TableUser;
-import love.sola.netsupport.util.Checker;
-import love.sola.netsupport.util.ParseUtil;
 import love.sola.netsupport.wechat.Command;
 import me.chanjar.weixin.common.session.WxSession;

-import javax.servlet.ServletConfig;
-import javax.servlet.ServletException;
-import javax.servlet.annotation.WebServlet;
-import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-import java.io.IOException;
-import java.io.PrintWriter;

 /**
 * ***********************************************
@@ -28,62 +16,37 @@ import java.io.PrintWriter;
 * Don't modify this source without my agreement
 * ***********************************************
 */
-@WebServlet(name = "GetUser",urlPatterns = "/api/admin/getuser",loadOnStartup = 41)
-public class GetUser extends HttpServlet {
+public class GetUser extends API {

-	private Gson gson = SQLCore.gson;
+	public GetUser() {
+		url = "/api/admin/getuser";
+		access = Access.LEADER;
+		authorize = Command.LOGIN;
+	}

 	@Override
-	public void init(ServletConfig config) throws ServletException {
-		super.init(config);
-	}
-
-	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		doGet(request, response);
-	}
-	
-	@SuppressWarnings("Duplicates")
-	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		request.setCharacterEncoding("utf-8");
-		response.setCharacterEncoding("utf-8");
-		response.addHeader("Content-type", "application/json;charset=utf-8");
-		PrintWriter out = response.getWriter();
-		String json = gson.toJson(query(request));
-		out.println(ParseUtil.parseJsonP(request, json));
-		out.close();
-	}
-
-	private Response query(HttpServletRequest request) {
-		WxSession session = Checker.isAuthorized(request, Command.LOGIN);
-		if (session == null) {
-			return new Response(Response.ResponseCode.UNAUTHORIZED);
-		}
-		Operator op = (Operator) session.getAttribute(Attribute.OPERATOR);
-		if (op.getAccess() > Access.LEADER) {
-			return new Response(Response.ResponseCode.PERMISSION_DENIED);
-		}
-
-		String id = request.getParameter("id");
-		String name = request.getParameter("name");
+	protected Object process(HttpServletRequest req, WxSession session) throws Exception {
+		String id = req.getParameter("id");
+		String name = req.getParameter("name");
 		if ((id == null || id.isEmpty()) && (name == null || name.isEmpty())) {
-			return new Response(Response.ResponseCode.PARAMETER_REQUIRED);
+			return Error.PARAMETER_REQUIRED;
 		}
 		if (id != null) {
 			try {
 				User u = TableUser.getById(Long.parseLong(id));
 				if (u == null)
-					return new Response(Response.ResponseCode.USER_NOT_FOUND);
+					return Error.USER_NOT_FOUND;
 				else
-					return new Response(Response.ResponseCode.OK, u);
+					return u;
 			} catch (NumberFormatException e) {
-				return new Response(Response.ResponseCode.ILLEGAL_PARAMETER);
+				return Error.ILLEGAL_PARAMETER;
 			}
 		} else {
 			User u = TableUser.getByName(name);
 			if (u == null)
-				return new Response(Response.ResponseCode.USER_NOT_FOUND);
+				return Error.USER_NOT_FOUND;
 			else
-				return new Response(Response.ResponseCode.OK, u);
+				return u;
 		}
 	}

--- a/src/main/java/love/sola/netsupport/api/manager/TicketPush.java
+++ b/src/main/java/love/sola/netsupport/api/manager/TicketPush.java
@@ -1,7 +1,7 @@
 package love.sola.netsupport.api.manager;

-import com.google.gson.Gson;
-import love.sola.netsupport.api.Response;
+import love.sola.netsupport.api.API;
+import love.sola.netsupport.api.Error;
 import love.sola.netsupport.config.Settings;
 import love.sola.netsupport.enums.Access;
 import love.sola.netsupport.enums.Attribute;
@@ -11,19 +11,11 @@ import love.sola.netsupport.pojo.Ticket;
 import love.sola.netsupport.pojo.User;
 import love.sola.netsupport.sql.SQLCore;
 import love.sola.netsupport.util.Checker;
-import love.sola.netsupport.util.ParseUtil;
 import love.sola.netsupport.wechat.Command;
 import me.chanjar.weixin.common.session.WxSession;
-import org.hibernate.HibernateException;
 import org.hibernate.Session;

-import javax.servlet.ServletException;
-import javax.servlet.annotation.WebServlet;
-import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-import java.io.IOException;
-import java.io.PrintWriter;

 /**
 * ***********************************************
@@ -31,62 +23,35 @@ import java.io.PrintWriter;
 * Don't modify this source without my agreement
 * ***********************************************
 */
-@WebServlet(name = "TicketPush",urlPatterns = "/api/admin/ticketpush",loadOnStartup = 42)
-public class TicketPush extends HttpServlet{
+public class TicketPush extends API {

-	private Gson gson = SQLCore.gson;
-
-	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		doGet(request, response);
+	public TicketPush() {
+		url = "/api/admin/ticketpush";
+		access = Access.LEADER;
+		authorize = Command.LOGIN;
 	}

-	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		request.setCharacterEncoding("utf-8");
-		response.setCharacterEncoding("utf-8");
-		response.addHeader("Content-type", "application/json;charset=utf-8");
-		PrintWriter out = response.getWriter();
-		String json = gson.toJson(push(request));
-		out.println(ParseUtil.parseJsonP(request, json));
-		out.close();
-	}
-
-	private Response push(HttpServletRequest request) {
-		String uid = request.getParameter("uid");
-		String desc = request.getParameter("desc");
+	@Override
+	protected Object process(HttpServletRequest req, WxSession session) throws Exception {
+		String uid = req.getParameter("uid");
+		String desc = req.getParameter("desc");
 		if (Checker.hasNull(uid, desc)) {
-			return new Response(Response.ResponseCode.PARAMETER_REQUIRED);
+			return Error.PARAMETER_REQUIRED;
 		}
 		if (desc.length() > Settings.MAX_DESC_LENGTH) {
-			return new Response(Response.ResponseCode.LENGTH_LIMIT_EXCEEDED);
-		}
-
-		WxSession session = Checker.isAuthorized(request, Command.LOGIN);
-		if (session == null) {
-			return new Response(Response.ResponseCode.UNAUTHORIZED);
+			return Error.LENGTH_LIMIT_EXCEEDED;
 		}
 		Operator op = (Operator) session.getAttribute(Attribute.OPERATOR);
-		if (op.getAccess() > Access.LEADER) {
-			return new Response(Response.ResponseCode.PERMISSION_DENIED);
-		}
-
 		try (Session s = SQLCore.sf.openSession()) {
 			s.beginTransaction();
 			User u = s.get(User.class, Long.parseLong(uid));
 			if (u == null) {
-				return new Response(Response.ResponseCode.USER_NOT_FOUND);
+				return Error.USER_NOT_FOUND;
 			}
 			Ticket t = new Ticket(null, u, desc, null, "Pushed By Admin", null, op, Status.UNCHECKED);
 			s.save(t);
 			s.getTransaction().commit();
-			return new Response(Response.ResponseCode.OK, t);
-		} catch (NumberFormatException e) {
-			return new Response(Response.ResponseCode.ILLEGAL_PARAMETER);
-		} catch (HibernateException e) {
-			e.printStackTrace();
-			return new Response(Response.ResponseCode.DATABASE_ERROR, e.getMessage());
-		} catch (Exception e) {
-			e.printStackTrace();
-			return new Response(Response.ResponseCode.INTERNAL_ERROR, e.getMessage());
+			return t;
 		}
 	}

--- a/src/main/java/love/sola/netsupport/api/root/DashBoard.java
+++ b/src/main/java/love/sola/netsupport/api/root/DashBoard.java
@@ -1,21 +1,13 @@
 package love.sola.netsupport.api.root;

+import love.sola.netsupport.api.API;
 import love.sola.netsupport.enums.Access;
-import love.sola.netsupport.enums.Attribute;
-import love.sola.netsupport.pojo.Operator;
-import love.sola.netsupport.util.Checker;
 import love.sola.netsupport.wechat.Command;
 import love.sola.netsupport.wechat.WechatSession;
 import me.chanjar.weixin.common.session.InternalSession;
 import me.chanjar.weixin.common.session.WxSession;

-import javax.servlet.ServletException;
-import javax.servlet.annotation.WebServlet;
-import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-import java.io.IOException;
-import java.io.PrintWriter;
 import java.util.Enumeration;

 /**
@@ -24,46 +16,27 @@ import java.util.Enumeration;
 * Don't modify this source without my agreement
 * ***********************************************
 */
+public class DashBoard extends API {

-@WebServlet(name = "Dashboard", urlPatterns = "/api/root/dashboard", loadOnStartup = 51)
-public class DashBoard extends HttpServlet {
-
-	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		doGet(request, response);
+	public DashBoard() {
+		url = "/api/root/dashboard";
+		access = Access.ROOT;
+		authorize = Command.LOGIN;
 	}

-	@SuppressWarnings("Duplicates")
-	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		request.setCharacterEncoding("utf-8");
-		response.setCharacterEncoding("utf-8");
-		response.addHeader("Content-type", "text/plain;charset=utf-8");
-		PrintWriter out = response.getWriter();
-		process(request, out);
-		out.close();
-	}
-
-	private void process(HttpServletRequest request, PrintWriter out) {
-		WxSession session = Checker.isAuthorized(request, Command.LOGIN);
-		if (session == null) {
-			out.println("Unauthorized");
-			return;
-		}
-
-		Operator op = (Operator) session.getAttribute(Attribute.OPERATOR);
-		if (op.getAccess() != Access.ROOT) {
-			out.println("Unauthorized");
-			return;
-		}
-
+	@Override
+	protected Object process(HttpServletRequest req, WxSession session) throws Exception {
+		StringBuilder sb = new StringBuilder();
 		for (InternalSession s : WechatSession.list()) {
-			out.println("=====" + s.getIdInternal() + "=====");
+			sb.append("=====").append(s.getIdInternal()).append("=====\n");
 			WxSession ws = s.getSession();
 			Enumeration<String> e = ws.getAttributeNames();
 			while (e.hasMoreElements()) {
 				String key = e.nextElement();
-				out.println(key + ": " + ws.getAttribute(key));
+				sb.append(key).append(": ").append(ws.getAttribute(key)).append("\n");
 			}
 		}
+		return sb.toString();
 	}

 }
--- a/src/main/java/love/sola/netsupport/api/root/FlushCache.java
+++ b/src/main/java/love/sola/netsupport/api/root/FlushCache.java
@@ -1,20 +1,13 @@
 package love.sola.netsupport.api.root;

+import love.sola.netsupport.api.API;
+import love.sola.netsupport.api.Error;
 import love.sola.netsupport.enums.Access;
-import love.sola.netsupport.enums.Attribute;
-import love.sola.netsupport.pojo.Operator;
 import love.sola.netsupport.sql.TableUser;
-import love.sola.netsupport.util.Checker;
 import love.sola.netsupport.wechat.Command;
 import me.chanjar.weixin.common.session.WxSession;

-import javax.servlet.ServletException;
-import javax.servlet.annotation.WebServlet;
-import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-import java.io.IOException;
-import java.io.PrintWriter;

 /**
 * ***********************************************
@@ -22,38 +15,18 @@ import java.io.PrintWriter;
 * Don't modify this source without my agreement
 * ***********************************************
 */
+public class FlushCache extends API {

-@WebServlet(name = "FlushCache", urlPatterns = "/api/root/flushcache", loadOnStartup = 52)
-public class FlushCache extends HttpServlet {
-
-	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		doGet(request, response);
+	public FlushCache() {
+		url = "/api/root/flushcache";
+		access = Access.ROOT;
+		authorize = Command.LOGIN;
 	}

-	@SuppressWarnings("Duplicates")
-	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		request.setCharacterEncoding("utf-8");
-		response.setCharacterEncoding("utf-8");
-		response.addHeader("Content-type", "text/plain;charset=utf-8");
-		PrintWriter out = response.getWriter();
-		process(request, out);
-		out.close();
-	}
-
-	private void process(HttpServletRequest request, PrintWriter out) {
-		WxSession session = Checker.isAuthorized(request, Command.LOGIN);
-		if (session == null) {
-			out.println("Unauthorized");
-			return;
-		}
-
-		Operator op = (Operator) session.getAttribute(Attribute.OPERATOR);
-		if (op.getAccess() != Access.ROOT) {
-			out.println("Unauthorized");
-			return;
-		}
+	@Override
+	protected Object process(HttpServletRequest req, WxSession session) throws Exception {
 		TableUser.flushCache();
-		out.println("Flushed wechat cache");
+		return Error.OK;
 	}

 }
--- a/src/main/java/love/sola/netsupport/api/root/SetPassword.java
+++ b/src/main/java/love/sola/netsupport/api/root/SetPassword.java
@@ -1,22 +1,16 @@
 package love.sola.netsupport.api.root;

+import love.sola.netsupport.api.API;
+import love.sola.netsupport.api.Error;
 import love.sola.netsupport.enums.Access;
-import love.sola.netsupport.enums.Attribute;
 import love.sola.netsupport.pojo.Operator;
 import love.sola.netsupport.sql.SQLCore;
-import love.sola.netsupport.util.Checker;
 import love.sola.netsupport.util.Crypto;
 import love.sola.netsupport.wechat.Command;
 import me.chanjar.weixin.common.session.WxSession;
 import org.hibernate.Session;

-import javax.servlet.ServletException;
-import javax.servlet.annotation.WebServlet;
-import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-import java.io.IOException;
-import java.io.PrintWriter;

 /**
 * ***********************************************
@@ -24,56 +18,31 @@ import java.io.PrintWriter;
 * Don't modify this source without my agreement
 * ***********************************************
 */
-@WebServlet(name = "SetPassword",urlPatterns = "/api/root/setpass",loadOnStartup = 53)
-public class SetPassword extends HttpServlet{
+public class SetPassword extends API {

-	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		doGet(request, response);
+	public SetPassword() {
+		url = "/api/root/setpass";
+		access = Access.ROOT;
+		authorize = Command.LOGIN;
 	}

-	@SuppressWarnings("Duplicates")
-	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		request.setCharacterEncoding("utf-8");
-		response.setCharacterEncoding("utf-8");
-		response.addHeader("Content-type", "text/plain;charset=utf-8");
-		PrintWriter out = response.getWriter();
-		process(request, out);
-		out.close();
-	}
-
-	private void process(HttpServletRequest request, PrintWriter out) {
-		WxSession session = Checker.isAuthorized(request, Command.LOGIN);
-		if (session == null) {
-			out.println("Unauthorized");
-			return;
-		}
-
-		Operator op = (Operator) session.getAttribute(Attribute.OPERATOR);
-		if (op.getAccess() != Access.ROOT) {
-			out.println("Unauthorized");
-			return;
-		}
-
-		String id = request.getParameter("id");
-		String pass = request.getParameter("pass");
+	@Override
+	protected Object process(HttpServletRequest req, WxSession session) throws Exception {
+		String id = req.getParameter("id");
+		String pass = req.getParameter("pass");
 		if (pass == null || pass.length() < 8) {
-			out.println("Invalid pass");
-			return;
+			return Error.INVALID_PARAMETER;
 		}
 		try (Session s = SQLCore.sf.openSession()) {
 			s.beginTransaction();
-			op = s.get(Operator.class, Integer.parseInt(id));
+			Operator op = s.get(Operator.class, Integer.parseInt(id));
 			if (op == null) {
-				out.println("Invalid user");
-				return;
+				return Error.OPERATOR_NOT_FOUND;
 			}
 			op.setPassword(Crypto.hash(pass));
 			s.update(op);
 			s.getTransaction().commit();
-			out.println("Operation success");
-		} catch (NumberFormatException e) {
-			out.println("Invalid id");
-			return;
+			return Error.OK;
 		}
 	}

--- a/src/main/java/love/sola/netsupport/api/stuff/TicketLog.java
+++ b/src/main/java/love/sola/netsupport/api/stuff/TicketLog.java
@@ -1,28 +1,18 @@
 package love.sola.netsupport.api.stuff;

-import com.google.gson.Gson;
-import love.sola.netsupport.api.Response;
+import love.sola.netsupport.api.API;
+import love.sola.netsupport.enums.Access;
 import love.sola.netsupport.pojo.Ticket;
 import love.sola.netsupport.sql.SQLCore;
 import love.sola.netsupport.sql.TableTicket;
-import love.sola.netsupport.util.Checker;
-import love.sola.netsupport.util.ParseUtil;
 import love.sola.netsupport.wechat.Command;
 import me.chanjar.weixin.common.session.WxSession;
 import org.apache.commons.lang3.time.DateUtils;
-import org.hibernate.HibernateException;
 import org.hibernate.Session;
 import org.hibernate.envers.AuditReader;
 import org.hibernate.envers.query.AuditEntity;

-import javax.servlet.ServletException;
-import javax.servlet.annotation.WebServlet;
-import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-import java.io.IOException;
-import java.io.PrintWriter;
-import java.text.ParseException;
 import java.text.SimpleDateFormat;
 import java.util.Calendar;
 import java.util.Date;
@@ -33,61 +23,36 @@ import java.util.Date;
 * Don't modify this source without my agreement
 * ***********************************************
 */
-@WebServlet(name = "TicketLog", urlPatterns = "/api/admin/ticketlog", loadOnStartup = 35)
-public class TicketLog extends HttpServlet {
+public class TicketLog extends API {

 	public static SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMdd");
-	private Gson gson = SQLCore.gson;

-	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		doGet(request, response);
+	public TicketLog() {
+		url = "/api/admin/ticketlog";
+		access = Access.MEMBER;
+		authorize = Command.LOGIN;
 	}

-	@SuppressWarnings("Duplicates")
-	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		request.setCharacterEncoding("utf-8");
-		response.setCharacterEncoding("utf-8");
-		response.addHeader("Content-type", "application/json;charset=utf-8");
-		PrintWriter out = response.getWriter();
-		String json = gson.toJson(query(request));
-		out.println(ParseUtil.parseJsonP(request, json));
-		out.close();
-	}
-
-	private Response query(HttpServletRequest request) {
-		WxSession session = Checker.isAuthorized(request, Command.LOGIN);
-		if (session == null) {
-			return new Response(Response.ResponseCode.UNAUTHORIZED);
-		}
+	@Override
+	protected Object process(HttpServletRequest req, WxSession session) throws Exception {
 		int first;
 		int limit;
 		Date start;
 		Date end;
-		try {
-			first = request.getParameter("first") == null ? 0 : Integer.parseInt(request.getParameter("first"));
-			limit = request.getParameter("limit") == null ? 20 : Integer.parseInt(request.getParameter("limit"));
-			start = request.getParameter("start") == null ? getToday() : dateFormat.parse(request.getParameter("start"));
-			end = request.getParameter("end") == null ? getToday() : dateFormat.parse(request.getParameter("end"));
-			end = DateUtils.addDays(end, 1);
-		} catch (ParseException | NumberFormatException e) {
-			return new Response(Response.ResponseCode.ILLEGAL_PARAMETER);
-		}
+		first = req.getParameter("first") == null ? 0 : Integer.parseInt(req.getParameter("first"));
+		limit = req.getParameter("limit") == null ? 20 : Integer.parseInt(req.getParameter("limit"));
+		start = req.getParameter("start") == null ? getToday() : dateFormat.parse(req.getParameter("start"));
+		end = req.getParameter("end") == null ? getToday() : dateFormat.parse(req.getParameter("end"));
+		end = DateUtils.addDays(end, 1);
 		try (Session s = SQLCore.sf.openSession()) {
 			AuditReader reader = TableTicket.getAuditReader(s);
-			Object obj = reader.createQuery()
+			return reader.createQuery()
 					.forRevisionsOfEntity(Ticket.class, false, true)
 					.addOrder(AuditEntity.revisionNumber().desc())
 					.add(AuditEntity.revisionProperty("timestamp").between(start.getTime(), end.getTime()))
 					.setFirstResult(first)
 					.setMaxResults(limit)
 					.getResultList();
-			return new Response(Response.ResponseCode.OK, obj);
-		} catch (HibernateException e) {
-			e.printStackTrace();
-			return new Response(Response.ResponseCode.DATABASE_ERROR, e.getMessage());
-		} catch (Exception e) {
-			e.printStackTrace();
-			return new Response(Response.ResponseCode.INTERNAL_ERROR, e.getMessage());
 		}
 	}

--- a/src/main/java/love/sola/netsupport/api/stuff/TicketLookup.java
+++ b/src/main/java/love/sola/netsupport/api/stuff/TicketLookup.java
@@ -1,27 +1,14 @@
 package love.sola.netsupport.api.stuff;

-import com.google.gson.Gson;
-import love.sola.netsupport.api.Response;
+import love.sola.netsupport.api.API;
 import love.sola.netsupport.enums.Access;
 import love.sola.netsupport.enums.Attribute;
 import love.sola.netsupport.pojo.Operator;
-import love.sola.netsupport.pojo.Ticket;
-import love.sola.netsupport.sql.SQLCore;
 import love.sola.netsupport.sql.TableTicket;
-import love.sola.netsupport.util.Checker;
-import love.sola.netsupport.util.ParseUtil;
 import love.sola.netsupport.wechat.Command;
 import me.chanjar.weixin.common.session.WxSession;
-import org.hibernate.HibernateException;

-import javax.servlet.ServletException;
-import javax.servlet.annotation.WebServlet;
-import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-import java.io.IOException;
-import java.io.PrintWriter;
-import java.util.List;

 /**
 * ***********************************************
@@ -29,52 +16,24 @@ import java.util.List;
 * Don't modify this source without my agreement
 * ***********************************************
 */
-@WebServlet(name = "TicketLookup", urlPatterns = "/api/admin/ticketlookup", loadOnStartup = 33)
-public class TicketLookup extends HttpServlet {
+public class TicketLookup extends API {

-	private Gson gson = SQLCore.gson;
-
-	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		doGet(request, response);
+	public TicketLookup() {
+		url = "/api/admin/ticketlookup";
+		access = Access.MEMBER;
+		authorize = Command.LOGIN;
 	}

-	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		request.setCharacterEncoding("utf-8");
-		response.setCharacterEncoding("utf-8");
-		response.addHeader("Content-type", "application/json;charset=utf-8");
-		PrintWriter out = response.getWriter();
-		String json = gson.toJson(lookup(request));
-		out.println(ParseUtil.parseJsonP(request, json));
-		out.close();
-	}
-
-	private Response lookup(HttpServletRequest request) {
-		WxSession session = Checker.isAuthorized(request, Command.LOGIN);
-		if (session == null) {
-			return new Response(Response.ResponseCode.UNAUTHORIZED);
-		}
-		try {
-			Operator op = (Operator) session.getAttribute(Attribute.OPERATOR);
-			int block;
-			if (request.getParameter("block") != null) {
-				block = Integer.parseInt(request.getParameter("block"));
-			} else {
-				block = op.getBlock();
-			}
-			if (block == 0 && op.getAccess() > Access.MEMBER) {
-				return new Response(Response.ResponseCode.PERMISSION_DENIED);
-			}
-			List<Ticket> list = TableTicket.unsolvedByBlock(block);
-			return new Response(Response.ResponseCode.OK, list);
-		} catch (NumberFormatException e) {
-			return new Response(Response.ResponseCode.ILLEGAL_PARAMETER);
-		} catch (HibernateException e) {
-			e.printStackTrace();
-			return new Response(Response.ResponseCode.DATABASE_ERROR, e.getMessage());
-		} catch (Exception e) {
-			e.printStackTrace();
-			return new Response(Response.ResponseCode.INTERNAL_ERROR, e.getMessage());
+	@Override
+	protected Object process(HttpServletRequest req, WxSession session) throws Exception {
+		Operator op = (Operator) session.getAttribute(Attribute.OPERATOR);
+		int block;
+		if (req.getParameter("block") != null) {
+			block = Integer.parseInt(req.getParameter("block"));
+		} else {
+			block = op.getBlock();
 		}
+		return TableTicket.unsolvedByBlock(block);
 	}

 }
--- a/src/main/java/love/sola/netsupport/api/stuff/TicketTrack.java
+++ b/src/main/java/love/sola/netsupport/api/stuff/TicketTrack.java
@@ -1,22 +1,13 @@
 package love.sola.netsupport.api.stuff;

-import com.google.gson.Gson;
-import love.sola.netsupport.api.Response;
-import love.sola.netsupport.sql.SQLCore;
+import love.sola.netsupport.api.API;
+import love.sola.netsupport.api.Error;
+import love.sola.netsupport.enums.Access;
 import love.sola.netsupport.sql.TableTicket;
-import love.sola.netsupport.util.Checker;
-import love.sola.netsupport.util.ParseUtil;
 import love.sola.netsupport.wechat.Command;
 import me.chanjar.weixin.common.session.WxSession;
-import org.hibernate.HibernateException;

-import javax.servlet.ServletException;
-import javax.servlet.annotation.WebServlet;
-import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-import java.io.IOException;
-import java.io.PrintWriter;

 /**
 * ***********************************************
@@ -24,47 +15,21 @@ import java.io.PrintWriter;
 * Don't modify this source without my agreement
 * ***********************************************
 */
+public class TicketTrack extends API {

-@WebServlet(name = "TicketTrack", urlPatterns = "/api/admin/tickettrack", loadOnStartup = 34)
-public class TicketTrack extends HttpServlet{
-
-	private Gson gson = SQLCore.gson;
-
-	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		doGet(request, response);
+	public TicketTrack() {
+		url = "/api/admin/tickettrack";
+		access = Access.MEMBER;
+		authorize = Command.LOGIN;
 	}

-	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		request.setCharacterEncoding("utf-8");
-		response.setCharacterEncoding("utf-8");
-		response.addHeader("Content-type", "application/json;charset=utf-8");
-		PrintWriter out = response.getWriter();
-		String json = gson.toJson(track(request));
-		out.println(ParseUtil.parseJsonP(request, json));
-		out.close();
-	}
-
-	private Response track(HttpServletRequest request) {
-		String tid = request.getParameter("id");
+	@Override
+	protected Object process(HttpServletRequest req, WxSession session) throws Exception {
+		String tid = req.getParameter("id");
 		if (tid == null) {
-			return new Response(Response.ResponseCode.PARAMETER_REQUIRED);
-		}
-		WxSession session = Checker.isAuthorized(request, Command.LOGIN);
-		if (session == null) {
-			return new Response(Response.ResponseCode.UNAUTHORIZED);
-		}
-		try {
-			return new Response(Response.ResponseCode.OK, TableTicket.track(Integer.parseInt(tid)));
-		} catch (NumberFormatException e) {
-			return new Response(Response.ResponseCode.ILLEGAL_PARAMETER);
-		} catch (HibernateException e) {
-			e.printStackTrace();
-			return new Response(Response.ResponseCode.DATABASE_ERROR, e.getMessage());
-		} catch (Exception e) {
-			e.printStackTrace();
-			return new Response(Response.ResponseCode.INTERNAL_ERROR, e.getMessage());
+			return Error.PARAMETER_REQUIRED;
 		}
+		return TableTicket.track(Integer.parseInt(tid));
 	}

-
 }
--- a/src/main/java/love/sola/netsupport/api/stuff/TicketUpdate.java
+++ b/src/main/java/love/sola/netsupport/api/stuff/TicketUpdate.java
@@ -1,25 +1,18 @@
 package love.sola.netsupport.api.stuff;

-import com.google.gson.Gson;
-import love.sola.netsupport.api.Response;
+import love.sola.netsupport.api.API;
+import love.sola.netsupport.api.Error;
+import love.sola.netsupport.enums.Access;
 import love.sola.netsupport.enums.Attribute;
 import love.sola.netsupport.pojo.Operator;
 import love.sola.netsupport.pojo.Ticket;
 import love.sola.netsupport.sql.SQLCore;
 import love.sola.netsupport.util.Checker;
-import love.sola.netsupport.util.ParseUtil;
 import love.sola.netsupport.wechat.Command;
 import me.chanjar.weixin.common.session.WxSession;
-import org.hibernate.HibernateException;
 import org.hibernate.Session;

-import javax.servlet.ServletException;
-import javax.servlet.annotation.WebServlet;
-import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-import java.io.IOException;
-import java.io.PrintWriter;
 import java.util.Date;

 /**
@@ -28,39 +21,25 @@ import java.util.Date;
 * Don't modify this source without my agreement
 * ***********************************************
 */
-@WebServlet(name = "TicketUpdate", urlPatterns = "/api/admin/ticketupdate", loadOnStartup = 32)
-public class TicketUpdate extends HttpServlet {
+public class TicketUpdate extends API {

-	private Gson gson = SQLCore.gson;
-
-	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		doGet(request, response);
+	public TicketUpdate() {
+		url = "/api/admin/ticketupdate";
+		access = Access.MEMBER;
+		authorize = Command.LOGIN;
 	}

-	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		request.setCharacterEncoding("utf-8");
-		response.setCharacterEncoding("utf-8");
-		response.addHeader("Content-type", "application/json;charset=utf-8");
-		PrintWriter out = response.getWriter();
-		String json = gson.toJson(update(request));
-		out.println(ParseUtil.parseJsonP(request, json));
-		out.close();
-	}
-
-	private Response update(HttpServletRequest request) {
-		String ticket = request.getParameter("ticket");
-		String remark = request.getParameter("remark");
-		String status = request.getParameter("status");
-		if (Checker.hasNull(ticket, remark, status)) return new Response(Response.ResponseCode.PARAMETER_REQUIRED);
-		WxSession session = Checker.isAuthorized(request, Command.LOGIN);
-		if (session == null) {
-			return new Response(Response.ResponseCode.UNAUTHORIZED);
-		}
+	@Override
+	protected Object process(HttpServletRequest req, WxSession session) throws Exception {
+		String ticket = req.getParameter("ticket");
+		String remark = req.getParameter("remark");
+		String status = req.getParameter("status");
+		if (Checker.hasNull(ticket, remark, status)) return Error.PARAMETER_REQUIRED;
 		try (Session s = SQLCore.sf.openSession()) {
 			Operator op = (Operator) session.getAttribute(Attribute.OPERATOR);
 			Ticket t = s.get(Ticket.class, Integer.parseInt(ticket));
 			if (t == null) {
-				return new Response(Response.ResponseCode.TICKET_NOT_FOUND);
+				return Error.TICKET_NOT_FOUND;
 			}
 			t.setOperator(op);
 			t.setRemark(remark);
@@ -69,16 +48,7 @@ public class TicketUpdate extends HttpServlet {
 			s.beginTransaction();
 			s.update(t);
 			s.getTransaction().commit();
-			return new Response(Response.ResponseCode.OK, t);
-		} catch (NumberFormatException e) {
-			return new Response(Response.ResponseCode.ILLEGAL_PARAMETER);
-		} catch (HibernateException e) {
-			e.printStackTrace();
-			return new Response(Response.ResponseCode.DATABASE_ERROR, e.getMessage());
-		} catch (Exception e) {
-			e.printStackTrace();
-			return new Response(Response.ResponseCode.INTERNAL_ERROR, e.getMessage());
+			return t;
 		}
 	}
-
 }
--- a/src/main/java/love/sola/netsupport/api/user/ProfileModify.java
+++ b/src/main/java/love/sola/netsupport/api/user/ProfileModify.java
@@ -1,25 +1,17 @@
 package love.sola.netsupport.api.user;

-import com.google.gson.Gson;
-import love.sola.netsupport.api.Response;
+import love.sola.netsupport.api.API;
+import love.sola.netsupport.api.Error;
+import love.sola.netsupport.enums.Access;
 import love.sola.netsupport.enums.Attribute;
 import love.sola.netsupport.enums.ISP;
 import love.sola.netsupport.pojo.User;
-import love.sola.netsupport.sql.SQLCore;
 import love.sola.netsupport.sql.TableUser;
-import love.sola.netsupport.util.Checker;
-import love.sola.netsupport.util.ParseUtil;
 import love.sola.netsupport.wechat.Command;
 import me.chanjar.weixin.common.session.WxSession;
 import org.hibernate.exception.ConstraintViolationException;

-import javax.servlet.ServletException;
-import javax.servlet.annotation.WebServlet;
-import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-import java.io.IOException;
-import java.io.PrintWriter;

 import static love.sola.netsupport.util.Checker.*;

@@ -29,44 +21,28 @@ import static love.sola.netsupport.util.Checker.*;
 * Don't modify this source without my agreement
 * ***********************************************
 */
-@WebServlet(name = "ProfileModify", urlPatterns = "/api/profilemodify", loadOnStartup = 22)
-public class ProfileModify extends HttpServlet {
+public class ProfileModify extends API {

-	private Gson gson = SQLCore.gson;
-
-	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		doGet(request, response);
+	public ProfileModify() {
+		url = "/api/profilemodify";
+		access = Access.USER;
+		authorize = Command.PROFILE;
 	}

-	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		request.setCharacterEncoding("utf-8");
-		response.setCharacterEncoding("utf-8");
-		response.addHeader("Content-type", "application/json;charset=utf-8");
-		PrintWriter out = response.getWriter();
-		String json = gson.toJson(process(request));
-		out.println(ParseUtil.parseJsonP(request, json));
-		out.close();
-	}
-
-	private Response process(HttpServletRequest request) {
-		WxSession session = Checker.isAuthorized(request, Command.PROFILE);
-		if (session == null) {
-			return new Response(Response.ResponseCode.UNAUTHORIZED);
-		}
+	@Override
+	protected Object process(HttpServletRequest req, WxSession session) throws Exception {
 		User u = (User) session.getAttribute(Attribute.USER);
-		if (u == null) return new Response(Response.ResponseCode.UNAUTHORIZED);
-
-		ISP isp = checkISP(request.getParameter("isp"));
-		String netAccount = checkNetAccount(request.getParameter("username"), isp);
-		int block = checkBlock(request.getParameter("block"));
-		int room = checkRoom(request.getParameter("room"), block);
-		long phone = checkPhoneNumber(request.getParameter("phone"));
+		ISP isp = checkISP(req.getParameter("isp"));
+		String netAccount = checkNetAccount(req.getParameter("username"), isp);
+		int block = checkBlock(req.getParameter("block"));
+		int room = checkRoom(req.getParameter("room"), block);
+		long phone = checkPhoneNumber(req.getParameter("phone"));
 		if (room == -1)
-			return new Response(Response.ResponseCode.REQUEST_FAILED, "Invalid_Room");
+			return Error.INVALID_PARAMETER.withMsg("Invalid_Room");
 		if (phone == -1)
-			return new Response(Response.ResponseCode.REQUEST_FAILED, "Invalid_Phone_Number");
+			return Error.INVALID_PARAMETER.withMsg("Invalid_Phone_Number");
 		if (netAccount == null)
-			return new Response(Response.ResponseCode.REQUEST_FAILED, "Invalid_Account");
+			return Error.INVALID_PARAMETER.withMsg("Invalid_Account");

 		u.setIsp(isp);
 		u.setNetAccount(netAccount);
@@ -77,12 +53,9 @@ public class ProfileModify extends HttpServlet {
 			TableUser.update(u);
 		} catch (ConstraintViolationException e) {
 			String dupKey = e.getConstraintName();
-			return new Response(Response.ResponseCode.REQUEST_FAILED, "Duplicated_" + dupKey.toUpperCase());
-		} catch (Exception e) {
-			e.printStackTrace();
-			return new Response(Response.ResponseCode.INTERNAL_ERROR, e.getMessage());
+			return Error.INVALID_PARAMETER.withMsg("Duplicated_" + dupKey.toUpperCase());
 		}
 		session.invalidate();
-		return new Response(Response.ResponseCode.OK);
+		return Error.OK;
 	}
 }
--- a/src/main/java/love/sola/netsupport/api/user/Register.java
+++ b/src/main/java/love/sola/netsupport/api/user/Register.java
@@ -1,14 +1,13 @@
 package love.sola.netsupport.api.user;

-import com.google.gson.Gson;
-import love.sola.netsupport.api.Response;
+import love.sola.netsupport.api.API;
+import love.sola.netsupport.api.Error;
+import love.sola.netsupport.enums.Access;
 import love.sola.netsupport.enums.Attribute;
 import love.sola.netsupport.enums.ISP;
 import love.sola.netsupport.pojo.User;
 import love.sola.netsupport.sql.SQLCore;
 import love.sola.netsupport.sql.TableUser;
-import love.sola.netsupport.util.Checker;
-import love.sola.netsupport.util.ParseUtil;
 import love.sola.netsupport.wechat.Command;
 import love.sola.netsupport.wechat.WxMpServlet;
 import me.chanjar.weixin.common.exception.WxErrorException;
@@ -16,13 +15,7 @@ import me.chanjar.weixin.common.session.WxSession;
 import me.chanjar.weixin.mp.bean.WxMpCustomMessage;
 import org.hibernate.exception.ConstraintViolationException;

-import javax.servlet.ServletException;
-import javax.servlet.annotation.WebServlet;
-import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-import java.io.IOException;
-import java.io.PrintWriter;
 import java.sql.Connection;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
@@ -36,66 +29,45 @@ import static love.sola.netsupport.util.Checker.*;
 * Don't modify this source without my agreement
 * ***********************************************
 */
-@WebServlet(name = "Register", urlPatterns = "/api/register", loadOnStartup = 21)
-public class Register extends HttpServlet {
+public class Register extends API {

-	private Gson gson = SQLCore.gson;
+	public Register() {
+		url = "/api/register";
+		access = Access.GUEST;
+		authorize = Command.REGISTER;
+	}

-	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		request.setCharacterEncoding("utf-8");
-		response.setCharacterEncoding("utf-8");
-		response.addHeader("Content-type", "application/json;charset=utf-8");
-		PrintWriter out = response.getWriter();
-
-		WxSession session = Checker.isAuthorized(request, Command.REGISTER);
-		if (session == null) {
-			printAuthorizeFailed(request, out);
-			return;
-		}
+	@Override
+	protected Object process(HttpServletRequest req, WxSession session) throws Exception {
 		String wechat = (String) session.getAttribute(Attribute.WECHAT);
 		if (wechat == null) {
-			printAuthorizeFailed(request, out);
-			return;
+			return Error.UNAUTHORIZED;
 		}
-
-		ISP isp = checkISP(request.getParameter("isp"));
-		int block = checkBlock(request.getParameter("block"));
-		String result = register(
-				checkStudentId(request.getParameter("sid")),
-				request.getParameter("name"),
+		ISP isp = checkISP(req.getParameter("isp"));
+		int block = checkBlock(req.getParameter("block"));
+		return register(
+				checkStudentId(req.getParameter("sid")),
+				req.getParameter("name"),
 				isp,
-				checkNetAccount(request.getParameter("username"), isp),
+				checkNetAccount(req.getParameter("username"), isp),
 				block,
-				checkRoom(request.getParameter("room"), block),
-				checkPhoneNumber(request.getParameter("phone")),
-				wechat
-		);
-		boolean isSuccess = result.equals("Register_Success");
-		if (isSuccess) {
-			session.invalidate();
-			out.println(ParseUtil.parseJsonP(request, gson.toJson(new Response(Response.ResponseCode.OK, result))));
-		} else {
-			out.println(ParseUtil.parseJsonP(request, gson.toJson(new Response(Response.ResponseCode.REQUEST_FAILED, result))));
-		}
-		out.close();
+				checkRoom(req.getParameter("room"), block),
+				checkPhoneNumber(req.getParameter("phone")),
+				wechat);
 	}

-	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		doPost(request, response);
-	}
-
-	private String register(long sid, String name, ISP isp, String netAccount, int block, int room, long phone, String wechat) {
-		if (sid == -1) return "Invalid_Student_Id";
-		if (name == null) return "Invalid_Name";
-		if (isp == null) return "Invalid_ISP";
-		if (netAccount == null) return "Invalid_Account";
-		if (block == -1) return "Invalid_Block";
-		if (room == -1) return "Invalid_Room";
-		if (phone == -1) return "Invalid_Phone_Number";
+	private Object register(long sid, String name, ISP isp, String netAccount, int block, int room, long phone, String wechat) {
+		if (sid == -1) return Error.INVALID_PARAMETER.withMsg("Invalid_Student_Id");
+		if (name == null) return Error.INVALID_PARAMETER.withMsg("Invalid_Name");
+		if (isp == null) return Error.INVALID_PARAMETER.withMsg("Invalid_ISP");
+		if (netAccount == null) return Error.INVALID_PARAMETER.withMsg("Invalid_Account");
+		if (block == -1) return Error.INVALID_PARAMETER.withMsg("Invalid_Block");
+		if (room == -1) return Error.INVALID_PARAMETER.withMsg("Invalid_Room");
+		if (phone == -1) return Error.INVALID_PARAMETER.withMsg("Invalid_Phone_Number");
 		User user = TableUser.getById(sid);
-		if (user == null) return "Invalid_Student_Id";
-		if (!user.getName().equals(name)) return "Invalid_Name";
-		if (user.getWechatId() != null) return "User_Already_Registered";
+		if (user == null) return Error.INVALID_PARAMETER.withMsg("Invalid_Student_Id");
+		if (!user.getName().equals(name)) return Error.INVALID_PARAMETER.withMsg("Invalid_Name");
+		if (user.getWechatId() != null) return Error.INVALID_PARAMETER.withMsg("User_Already_Registered");
 		user.setIsp(isp);
 		user.setNetAccount(netAccount);
 		user.setBlock(block);
@@ -106,17 +78,11 @@ public class Register extends HttpServlet {
 			TableUser.update(user);
 		} catch (ConstraintViolationException e) {
 			String dupKey = e.getConstraintName();
-			return "Duplicated_" + dupKey.toUpperCase(); // PHONE ACCOUNT WECHAT
+			return Error.INVALID_PARAMETER.withMsg("Duplicated_" + dupKey.toUpperCase()); // PHONE ACCOUNT WECHAT
 		}
 		// FIXME: 2015/12/30 Temporary converter
 		converterWithRetry(user);
-		return "Register_Success";
-	}
-
-	private void printAuthorizeFailed(HttpServletRequest request, PrintWriter out) {
-		out.println(ParseUtil.parseJsonP(request, gson.toJson(new Response(Response.ResponseCode.UNAUTHORIZED))));
-		out.close();
-		return;
+		return Error.OK;
 	}

 	public static void converterWithRetry(User u) {
@@ -155,8 +121,6 @@ public class Register extends HttpServlet {
 					WxMpServlet.instance.wxMpService.customMessageSend(WxMpCustomMessage.TEXT().toUser(u.getWechatId()).content("已进行过数据转换").build());
 				}
 			}
-		} catch (SQLException | WxErrorException e) {
-			throw e;
 		}
 	}

--- a/src/main/java/love/sola/netsupport/api/user/TicketQuery.java
+++ b/src/main/java/love/sola/netsupport/api/user/TicketQuery.java
@@ -1,28 +1,19 @@
 package love.sola.netsupport.api.user;

-import com.google.gson.Gson;
-import love.sola.netsupport.api.Response;
+import love.sola.netsupport.api.API;
+import love.sola.netsupport.enums.Access;
 import love.sola.netsupport.enums.Attribute;
 import love.sola.netsupport.pojo.Ticket;
 import love.sola.netsupport.pojo.User;
 import love.sola.netsupport.sql.SQLCore;
-import love.sola.netsupport.util.Checker;
-import love.sola.netsupport.util.ParseUtil;
 import love.sola.netsupport.wechat.Command;
 import me.chanjar.weixin.common.session.WxSession;
 import org.hibernate.Criteria;
-import org.hibernate.HibernateException;
 import org.hibernate.Session;
 import org.hibernate.criterion.Order;
 import org.hibernate.criterion.Restrictions;

-import javax.servlet.ServletException;
-import javax.servlet.annotation.WebServlet;
-import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-import java.io.IOException;
-import java.io.PrintWriter;

 /**
 * ***********************************************
@@ -30,60 +21,34 @@ import java.io.PrintWriter;
 * Don't modify this source without my agreement
 * ***********************************************
 */
-@WebServlet(name = "TicketQuery", urlPatterns = "/api/ticketquery", loadOnStartup = 24)
-public class TicketQuery extends HttpServlet {
+public class TicketQuery extends API {

-	private Gson gson = SQLCore.gson;
-
-	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		doGet(request, response);
-	}
-	
-	@SuppressWarnings("Duplicates")
-	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		request.setCharacterEncoding("utf-8");
-		response.setCharacterEncoding("utf-8");
-		response.addHeader("Content-type", "application/json;charset=utf-8");
-		PrintWriter out = response.getWriter();
-		String json = gson.toJson(query(request));
-		out.println(ParseUtil.parseJsonP(request, json));
-		out.close();
+	public TicketQuery() {
+		url = "/api/ticketquery";
+		access = Access.USER;
+		authorize = Command.QUERY;
 	}

-	private Response query(HttpServletRequest request) {
+	@Override
+	protected Object process(HttpServletRequest req, WxSession session) throws Exception {
 		try (Session s = SQLCore.sf.openSession()) {
-
-			WxSession session = Checker.isAuthorized(request, Command.QUERY);
-			if (session == null) {
-				return new Response(Response.ResponseCode.UNAUTHORIZED);
-			}
 			User u = (User) session.getAttribute(Attribute.USER);
-			if (u == null) return new Response(Response.ResponseCode.UNAUTHORIZED);
-
 			Criteria c = s.createCriteria(Ticket.class);
-			int first = request.getParameter("offset") == null ? 0 : Integer.parseInt(request.getParameter("offset"));
-			int limit = request.getParameter("limit") == null ? 5 : Integer.parseInt(request.getParameter("limit"));
+			int first = req.getParameter("offset") == null ? 0 : Integer.parseInt(req.getParameter("offset"));
+			int limit = req.getParameter("limit") == null ? 5 : Integer.parseInt(req.getParameter("limit"));
 			c.setFirstResult(first);
 			c.setMaxResults(limit);
 			c.addOrder(Order.desc(Ticket.PROPERTY_SUBMIT_TIME));
 			c.add(Restrictions.eq(Ticket.PROPERTY_USER, u));
-			if (request.getParameter("status") != null) {
-				c.add(Restrictions.eq(Ticket.PROPERTY_STATUS, Integer.parseInt(request.getParameter("status"))));
-			} else if (request.getParameter("statusl") != null && request.getParameter("statush") != null) {
+			if (req.getParameter("status") != null) {
+				c.add(Restrictions.eq(Ticket.PROPERTY_STATUS, Integer.parseInt(req.getParameter("status"))));
+			} else if (req.getParameter("statusl") != null && req.getParameter("statush") != null) {
 				c.add(Restrictions.between(Ticket.PROPERTY_STATUS,
-						Integer.parseInt(request.getParameter("statusl")),
-						Integer.parseInt(request.getParameter("statush"))
+						Integer.parseInt(req.getParameter("statusl")),
+						Integer.parseInt(req.getParameter("statush"))
 				));
 			}
-			return new Response(Response.ResponseCode.OK, c.list());
-		} catch (NumberFormatException e) {
-			return new Response(Response.ResponseCode.ILLEGAL_PARAMETER);
-		} catch (HibernateException e) {
-			e.printStackTrace();
-			return new Response(Response.ResponseCode.DATABASE_ERROR, e.getMessage());
-		} catch (Exception e) {
-			e.printStackTrace();
-			return new Response(Response.ResponseCode.INTERNAL_ERROR, e.getMessage());
+			return c.list();
 		}
 	}

--- a/src/main/java/love/sola/netsupport/api/user/TicketSubmit.java
+++ b/src/main/java/love/sola/netsupport/api/user/TicketSubmit.java
@@ -1,27 +1,19 @@
 package love.sola.netsupport.api.user;

-import com.google.gson.Gson;
-import love.sola.netsupport.api.Response;
+import love.sola.netsupport.api.API;
+import love.sola.netsupport.api.Error;
 import love.sola.netsupport.config.Settings;
+import love.sola.netsupport.enums.Access;
 import love.sola.netsupport.enums.Attribute;
 import love.sola.netsupport.pojo.Ticket;
 import love.sola.netsupport.pojo.User;
 import love.sola.netsupport.sql.SQLCore;
 import love.sola.netsupport.sql.TableTicket;
-import love.sola.netsupport.util.Checker;
-import love.sola.netsupport.util.ParseUtil;
 import love.sola.netsupport.wechat.Command;
 import me.chanjar.weixin.common.session.WxSession;
-import org.hibernate.HibernateException;
 import org.hibernate.Session;

-import javax.servlet.ServletException;
-import javax.servlet.annotation.WebServlet;
-import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-import java.io.IOException;
-import java.io.PrintWriter;

 /**
 * ***********************************************
@@ -29,48 +21,30 @@ import java.io.PrintWriter;
 * Don't modify this source without my agreement
 * ***********************************************
 */
-@WebServlet(name = "TicketSubmit", urlPatterns = "/api/ticketsubmit", loadOnStartup = 23)
-public class TicketSubmit extends HttpServlet {
+public class TicketSubmit extends API {

-	private Gson gson = SQLCore.gson;
-
-	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		doGet(request, response);
+	public TicketSubmit() {
+		url = "/api/ticketsubmit";
+		access = Access.USER;
+		authorize = Command.SUBMIT;
 	}

-	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		request.setCharacterEncoding("utf-8");
-		response.setCharacterEncoding("utf-8");
-		response.addHeader("Content-type", "application/json;charset=utf-8");
-		PrintWriter out = response.getWriter();
-		String json = gson.toJson(submit(request));
-		out.println(ParseUtil.parseJsonP(request, json));
-		out.close();
-	}
-
-	private Response submit(HttpServletRequest request) {
-		String desc = request.getParameter("desc");
+	@Override
+	protected Object process(HttpServletRequest req, WxSession session) throws Exception {
+		String desc = req.getParameter("desc");
 		if (desc == null || desc.isEmpty()) {
-			return new Response(Response.ResponseCode.PARAMETER_REQUIRED);
+			return Error.PARAMETER_REQUIRED;
 		}
 		if (desc.length() > Settings.MAX_DESC_LENGTH) {
-			return new Response(Response.ResponseCode.LENGTH_LIMIT_EXCEEDED);
+			return Error.LENGTH_LIMIT_EXCEEDED;
 		}

 		try (Session s = SQLCore.sf.openSession()) {
-
-			WxSession session = Checker.isAuthorized(request, Command.SUBMIT);
-			if (session == null) {
-				return new Response(Response.ResponseCode.UNAUTHORIZED);
-			}
 			User u = (User) session.getAttribute(Attribute.USER);
-			if (u == null) return new Response(Response.ResponseCode.UNAUTHORIZED);
-
 			if (TableTicket.hasOpen(u)) {
 				session.invalidate();
-				return new Response(Response.ResponseCode.ALREADY_SUBMITTED);
+				return Error.ALREADY_SUBMITTED;
 			}
-
 			Ticket t = new Ticket();
 			t.setUser(u);
 			t.setDescription(desc);
@@ -79,17 +53,7 @@ public class TicketSubmit extends HttpServlet {
 			s.save(t);
 			s.getTransaction().commit();
 			session.invalidate();
-			return new Response(Response.ResponseCode.OK, t);
-		} catch (NumberFormatException e) {
-			return new Response(Response.ResponseCode.ILLEGAL_PARAMETER);
-		} catch (HibernateException e) {
-			e.printStackTrace();
-			return new Response(Response.ResponseCode.DATABASE_ERROR, e.getMessage());
-		} catch (Exception e) {
-			e.printStackTrace();
-			return new Response(Response.ResponseCode.INTERNAL_ERROR, e.getMessage());
+			return Error.OK;
 		}
 	}
-
-
 }
--- a/src/main/java/love/sola/netsupport/enums/Access.java
+++ b/src/main/java/love/sola/netsupport/enums/Access.java
@@ -14,6 +14,7 @@ import static love.sola.netsupport.config.Lang.lang;
 */
 public class Access {

+	public static final int GOD_MODE = -1;
 	public static final int ROOT = 0;
 	public static final int MANAGER = 1;
 	public static final int CO_MANAGER = 2;
@@ -23,7 +24,9 @@ public class Access {
 	public static final int ELDER = 6;
 	public static final int MEMBER = 7;
 	public static final int PRE_MEMBER = 8;
-	public static final int NOLOGIN = 9;
+	public static final int NO_LOGIN = 9;
+	public static final int USER = 10;
+	public static final int GUEST = 11;

 	public static final Map<Integer, String> inverseMap = new HashMap<>();

--- a/src/main/java/love/sola/netsupport/wechat/handler/admin/LoginHandler.java
+++ b/src/main/java/love/sola/netsupport/wechat/handler/admin/LoginHandler.java
@@ -35,7 +35,7 @@ public class LoginHandler implements WxMpMessageHandler {
 			Operator operator = TableOperator.get(wxMessage.getFromUserName());
 			if (operator == null)
 				out.content(lang("Not_Operator"));
-			else if (operator.getAccess() == Access.NOLOGIN) {
+			else if (operator.getAccess() >= Access.NO_LOGIN) {
 				out.content(lang("No_Login"));
 			} else {
 				String id = WechatSession.genId();
--- a/src/main/java/love/sola/netsupport/wechat/handler/admin/OperatorInfoHandler.java
+++ b/src/main/java/love/sola/netsupport/wechat/handler/admin/OperatorInfoHandler.java
@@ -31,7 +31,7 @@ public class OperatorInfoHandler implements WxMpMessageHandler {
 			Operator op = TableOperator.get(wxMessage.getFromUserName());
 			if (op == null)
 				out.content(lang("Not_Operator"));
-			else if (op.getAccess() == Access.NOLOGIN) {
+			else if (op.getAccess() >= Access.NO_LOGIN) {
 				out.content(lang("No_Login"));
 			} else {
 				out.content(format("Operator_Info", op.getId(), op.getName(), op.getAccess(), op.getBlock(), op.getWeek()));