69 lines
2.3 KiB
Java
69 lines
2.3 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 trailers;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.function.Supplier;
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import jakarta.servlet.ServletException;
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import jakarta.servlet.http.HttpServlet;
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import jakarta.servlet.http.HttpServletRequest;
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import jakarta.servlet.http.HttpServletResponse;
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/**
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* This example writes some trailer fields to the HTTP response.
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*/
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public class ResponseTrailers extends HttpServlet {
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private static final long serialVersionUID = 1L;
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private static final Supplier<Map<String,String>> TRAILER_FIELD_SUPPLIER =
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new TrailerFieldSupplier();
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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.setTrailerFields(TRAILER_FIELD_SUPPLIER);
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resp.setContentType("text/plain");
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resp.setCharacterEncoding("UTF-8");
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PrintWriter pw = resp.getWriter();
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pw.print("This response should include trailer fields.");
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}
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private static class TrailerFieldSupplier implements Supplier<Map<String,String>> {
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private static final Map<String,String> trailerFields = new HashMap<>();
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static {
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trailerFields.put("x-trailer-1", "Trailer value one");
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trailerFields.put("x-trailer-2", "Trailer value two");
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}
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@Override
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public Map<String, String> get() {
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return trailerFields;
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}
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}
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}
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