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author | Anton Tananaev <anton.tananaev@gmail.com> | 2015-05-03 14:35:59 +1200 |
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committer | Anton Tananaev <anton.tananaev@gmail.com> | 2015-05-03 14:35:59 +1200 |
commit | 7b58913edc7d1572ef66e16bd1c989a510455b6e (patch) | |
tree | 4cdc76ee53fe86ea357c711e967f4906c7deb275 /src/org/traccar/http/BaseServlet.java | |
parent | 18127a2dfc362ffd7de4110e013a10a9f894469b (diff) | |
download | traccar-server-7b58913edc7d1572ef66e16bd1c989a510455b6e.tar.gz traccar-server-7b58913edc7d1572ef66e16bd1c989a510455b6e.tar.bz2 traccar-server-7b58913edc7d1572ef66e16bd1c989a510455b6e.zip |
Create base servlet class
Diffstat (limited to 'src/org/traccar/http/BaseServlet.java')
-rw-r--r-- | src/org/traccar/http/BaseServlet.java | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/src/org/traccar/http/BaseServlet.java b/src/org/traccar/http/BaseServlet.java new file mode 100644 index 000000000..9249b33d8 --- /dev/null +++ b/src/org/traccar/http/BaseServlet.java @@ -0,0 +1,76 @@ +/* + * Copyright 2015 Anton Tananaev (anton.tananaev@gmail.com) + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.traccar.http; + +import java.io.IOException; +import java.io.Writer; +import java.security.AccessControlException; +import javax.json.Json; +import javax.json.JsonObjectBuilder; +import javax.json.JsonStructure; +import javax.servlet.ServletException; +import javax.servlet.http.HttpServlet; +import javax.servlet.http.HttpServletRequest; +import javax.servlet.http.HttpServletResponse; +import javax.servlet.http.HttpSession; + +public abstract class BaseServlet extends HttpServlet { + + public static final String USER_ID = "userId"; + + @Override + protected final void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { + String command = req.getPathInfo(); + try { + if (command == null || !handle(command, req, resp)) { + resp.sendError(HttpServletResponse.SC_BAD_REQUEST); + } + } catch (Exception error) { + sendResponse(resp.getWriter(), error); + } + } + + protected abstract boolean handle(String command, HttpServletRequest req, HttpServletResponse resp) throws Exception; + + public long getUserId(HttpSession session) { + Long userId = (Long) session.getAttribute(USER_ID); + if (userId == null) { + throw new AccessControlException("User is not logged in"); + } + return userId; + } + + public void sendResponse(Writer writer) throws IOException { + JsonObjectBuilder result = Json.createObjectBuilder(); + result.add("success", true); + writer.write(result.build().toString()); + } + + public void sendResponse(Writer writer, JsonStructure json) throws IOException { + JsonObjectBuilder result = Json.createObjectBuilder(); + result.add("success", true); + result.add("data", json); + writer.write(result.build().toString()); + } + + public void sendResponse(Writer writer, Exception error) throws IOException { + JsonObjectBuilder result = Json.createObjectBuilder(); + result.add("success", false); + result.add("error", error.getMessage()); + writer.write(result.build().toString()); + } + +} |