1 files changed, 103 insertions, 0 deletions
diff --git a/src/com/gitblit/JsonServlet.java b/src/com/gitblit/JsonServlet.java
new file mode 100644
index 00000000..b1d1053d
--- /dev/null
+++ b/src/com/gitblit/JsonServlet.java
@@ -0,0 +1,103 @@
+/*
+ * Copyright 2011 gitblit.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 com.gitblit;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.text.MessageFormat;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+
+/**
+ * Servlet class for interpreting json requests.
+ * 
+ * @author James Moger
+ * 
+ */
+public abstract class JsonServlet extends HttpServlet {
+
+	private static final long serialVersionUID = 1L;
+
+	protected final Logger logger;
+
+	public JsonServlet() {
+		super();
+		logger = LoggerFactory.getLogger(getClass());
+	}
+
+	/**
+	 * Processes an gson request.
+	 * 
+	 * @param request
+	 * @param response
+	 * @throws javax.servlet.ServletException
+	 * @throws java.io.IOException
+	 */
+	protected abstract void processRequest(HttpServletRequest request, HttpServletResponse response)
+			throws ServletException, IOException;
+
+	@Override
+	protected void doPost(HttpServletRequest request, HttpServletResponse response)
+			throws ServletException, java.io.IOException {
+		processRequest(request, response);
+	}
+
+	@Override
+	protected void doGet(HttpServletRequest request, HttpServletResponse response)
+			throws ServletException, IOException {
+		processRequest(request, response);
+	}
+
+	protected <X> X deserialize(HttpServletRequest request, HttpServletResponse response,
+			Class<X> clazz) throws IOException {
+		BufferedReader reader = request.getReader();
+		StringBuilder json = new StringBuilder();
+		String line = null;
+		while ((line = reader.readLine()) != null) {
+			json.append(line);
+		}
+		reader.close();
+
+		if (json.length() == 0) {
+			logger.error(MessageFormat.format("Failed to receive json data from {0}",
+					request.getRemoteAddr()));
+			response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
+			return null;
+		}
+
+		Gson gson = new Gson();
+		X object = gson.fromJson(json.toString(), clazz);
+		return object;
+	}
+
+	protected void serialize(HttpServletResponse response, Object o) throws IOException {
+		if (o != null) {
+			// Send JSON response
+			Gson gson = new GsonBuilder().setPrettyPrinting().create();
+			String json = gson.toJson(o);
+			response.getWriter().append(json);
+		}
+	}
+}