diff options
| author | James Moger <james.moger@gitblit.com> | 2013-11-21 18:32:21 -0500 |
|---|---|---|
| committer | James Moger <james.moger@gitblit.com> | 2013-11-29 11:05:51 -0500 |
| commit | 7bf6e183ff8abd0c35eeb29f399da12389562ecb (patch) | |
| tree | c06c5176d7d44ec6f4bcd7b79d34519266f49490 /src/main/java/com/gitblit/servlet/JsonServlet.java | |
| parent | 269c5043ab8f66f67d5719ac5149a436ca1baa2b (diff) | |
| download | gitblit-7bf6e183ff8abd0c35eeb29f399da12389562ecb.tar.gz gitblit-7bf6e183ff8abd0c35eeb29f399da12389562ecb.zip | |
Moved servlets and services to separate packages
Change-Id: I5f0f50f4ae7d332e9f724a2e6f074fa71f646035
Diffstat (limited to 'src/main/java/com/gitblit/servlet/JsonServlet.java')
| -rw-r--r-- | src/main/java/com/gitblit/servlet/JsonServlet.java | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/src/main/java/com/gitblit/servlet/JsonServlet.java b/src/main/java/com/gitblit/servlet/JsonServlet.java new file mode 100644 index 00000000..abc0f292 --- /dev/null +++ b/src/main/java/com/gitblit/servlet/JsonServlet.java @@ -0,0 +1,131 @@ +/*
+ * 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.servlet;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.lang.reflect.Type;
+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.gitblit.Constants;
+import com.gitblit.utils.JsonUtils;
+import com.gitblit.utils.StringUtils;
+
+/**
+ * Servlet class for interpreting json requests.
+ *
+ * @author James Moger
+ *
+ */
+public abstract class JsonServlet extends HttpServlet {
+
+ private static final long serialVersionUID = 1L;
+
+ protected final int forbiddenCode = HttpServletResponse.SC_FORBIDDEN;
+
+ protected final int notAllowedCode = HttpServletResponse.SC_METHOD_NOT_ALLOWED;
+
+ protected final int failureCode = HttpServletResponse.SC_INTERNAL_SERVER_ERROR;
+
+ 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 {
+ String json = readJson(request, response);
+ if (StringUtils.isEmpty(json)) {
+ return null;
+ }
+
+ X object = JsonUtils.fromJsonString(json.toString(), clazz);
+ return object;
+ }
+
+ protected <X> X deserialize(HttpServletRequest request, HttpServletResponse response, Type type)
+ throws IOException {
+ String json = readJson(request, response);
+ if (StringUtils.isEmpty(json)) {
+ return null;
+ }
+
+ X object = JsonUtils.fromJsonString(json.toString(), type);
+ return object;
+ }
+
+ private String readJson(HttpServletRequest request, HttpServletResponse response)
+ 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;
+ }
+ return json.toString();
+ }
+
+ protected void serialize(HttpServletResponse response, Object o) throws IOException {
+ if (o != null) {
+ // Send JSON response
+ String json = JsonUtils.toJsonString(o);
+ response.setCharacterEncoding(Constants.ENCODING);
+ response.setContentType("application/json");
+ response.getWriter().append(json);
+ }
+ }
+}
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