60 lines
2.2 KiB
Java
60 lines
2.2 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package http2;
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import java.io.IOException;
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import java.io.PrintWriter;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import javax.servlet.http.PushBuilder;
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public class SimpleImagePush extends HttpServlet {
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private static final long serialVersionUID = 1L;
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@Override
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protected void doGet(HttpServletRequest req, HttpServletResponse resp)
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throws ServletException, IOException {
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resp.setCharacterEncoding("UTF-8");
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resp.setContentType("text/html");
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PrintWriter pw = resp.getWriter();
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PushBuilder pb = req.newPushBuilder();
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if (pb != null) {
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pb.path("servlets/images/code.gif");
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pb.push();
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pw.println("<html>");
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pw.println("<body>");
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pw.println("<p>The following image was provided via a push request.</p>");
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pw.println("<img src=\"" + req.getContextPath() + "/servlets/images/code.gif\"/>");
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pw.println("</body>");
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pw.println("</html>");
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pw.flush();
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} else {
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pw.println("<html>");
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pw.println("<body>");
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pw.println("<p>Server push requests are not supported by this protocol.</p>");
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pw.println("</body>");
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pw.println("</html>");
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}
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}
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}
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