/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You 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.apache.catalina.connector;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;

import org.junit.Assert;
import org.junit.Test;

import org.apache.catalina.Context;
import org.apache.catalina.startup.Tomcat;
import org.apache.catalina.startup.TomcatBaseTest;
import org.apache.tomcat.util.buf.ByteChunk;

/**
 * Test case for {@link Request}.
 */
public class TestResponse extends TomcatBaseTest {

    @Test
    public void testBug49598() throws Exception {
        // Setup Tomcat instance
        Tomcat tomcat = getTomcatInstance();

        // No file system docBase required
        Context ctx = tomcat.addContext("", null);

        Tomcat.addServlet(ctx, "servlet", new Bug49598Servlet());
        ctx.addServletMapping("/", "servlet");

        tomcat.start();

        Map<String,List<String>> headers = new HashMap<>();
        getUrl("http://localhost:" + getPort() + "/", new ByteChunk(), headers);

        // Check for headers without a name
        for (Map.Entry<String,List<String>> header : headers.entrySet()) {
            if (header.getKey() == null) {
                // Expected if this is the response line
                List<String> values = header.getValue();
                if (values.size() == 1 &&
                        values.get(0).startsWith("HTTP/1.1")) {
                    continue;
                }
                fail("Null header name detected for value " + values);
            }
        }

        // Check for exactly one Set-Cookie header
        int count = 0;
        for (String headerName : headers.keySet()) {
            if ("Set-Cookie".equals(headerName)) {
                count ++;
            }
        }
        assertEquals(1, count);
    }

    private static final class Bug49598Servlet extends HttpServlet {
        private static final long serialVersionUID = 1L;

        @Override
        protected void doGet(HttpServletRequest req, HttpServletResponse resp)
                throws ServletException, IOException {
            HttpSession session = req.getSession(true);
            session.invalidate();
            req.getSession(true);
        }

    }


    /*
     * Tests an issue noticed during the investigation of BZ 52811.
     */
    @Test
    public void testCharset() throws Exception {
        // Setup Tomcat instance
        Tomcat tomcat = getTomcatInstance();

        // No file system docBase required
        Context ctx = tomcat.addContext("", null);

        Tomcat.addServlet(ctx, "servlet", new CharsetServlet());
        ctx.addServletMapping("/", "servlet");

        tomcat.start();

        ByteChunk bc = getUrl("http://localhost:" + getPort() + "/");

        assertEquals("OK", bc.toString());
    }

    private static final class CharsetServlet extends HttpServlet {
        private static final long serialVersionUID = 1L;

        @Override
        protected void doGet(HttpServletRequest req, HttpServletResponse resp)
                throws ServletException, IOException {
            PrintWriter pw = resp.getWriter();
            resp.setHeader("Content-Type", "text/plain;charset=UTF-8");

            // Should be ISO-8859-1 because getWriter() was called before
            // setHeader()
            if (resp.getCharacterEncoding().equals("ISO-8859-1")) {
                pw.print("OK");
            } else {
                pw.print("FAIL: " + resp.getCharacterEncoding());
            }
        }

    }


    @Test
    public void testBug52811() throws Exception {
        // Setup Tomcat instance
        Tomcat tomcat = getTomcatInstance();

        // No file system docBase required
        Context ctx = tomcat.addContext("", null);

        Tomcat.addServlet(ctx, "servlet", new Bug52811Servlet());
        ctx.addServletMapping("/", "servlet");

        tomcat.start();

        ByteChunk bc = getUrl("http://localhost:" + getPort() + "/");

        assertEquals("OK", bc.toString());
    }


    @Test
    public void testBug53062a() throws Exception {
        Request req = new TesterRequest();
        Response resp = new Response();
        resp.setRequest(req);

        String result = resp.toAbsolute("./bar.html");

        Assert.assertEquals("http://localhost:8080/level1/level2/bar.html",
                result);
    }


    @Test
    public void testBug53062b() throws Exception {
        Request req = new TesterRequest();
        Response resp = new Response();
        resp.setRequest(req);

        String result = resp.toAbsolute(".");

        Assert.assertEquals("http://localhost:8080/level1/level2/", result);
    }


    @Test
    public void testBug53062c() throws Exception {
        Request req = new TesterRequest();
        Response resp = new Response();
        resp.setRequest(req);

        String result = resp.toAbsolute("..");

        Assert.assertEquals("http://localhost:8080/level1/", result);
    }


    @Test
    public void testBug53062d() throws Exception {
        Request req = new TesterRequest();
        Response resp = new Response();
        resp.setRequest(req);

        String result = resp.toAbsolute(".././..");

        Assert.assertEquals("http://localhost:8080/", result);
    }


    @Test(expected=IllegalArgumentException.class)
    public void testBug53062e() throws Exception {
        Request req = new TesterRequest();
        Response resp = new Response();
        resp.setRequest(req);

        resp.toAbsolute("../../..");
    }


    @Test
    public void testBug53062f() throws Exception {
        Request req = new TesterRequest();
        Response resp = new Response();
        resp.setRequest(req);

        String result = resp.toAbsolute("bar.html");

        Assert.assertEquals(
                "http://localhost:8080/level1/level2/bar.html", result);
    }


    @Test
    public void testBug53062g() throws Exception {
        Request req = new TesterRequest();
        Response resp = new Response();
        resp.setRequest(req);

        String result = resp.toAbsolute("bar.html?x=/../");

        Assert.assertEquals(
                "http://localhost:8080/level1/level2/bar.html?x=/../", result);
    }


    @Test
    public void testBug53062h() throws Exception {
        Request req = new TesterRequest();
        Response resp = new Response();
        resp.setRequest(req);

        String result = resp.toAbsolute("bar.html?x=/../../");

        Assert.assertEquals(
                "http://localhost:8080/level1/level2/bar.html?x=/../../",
                result);
    }


    @Test
    public void testBug53062i() throws Exception {
        Request req = new TesterRequest();
        Response resp = new Response();
        resp.setRequest(req);

        String result = resp.toAbsolute("./.?x=/../../");

        Assert.assertEquals(
                "http://localhost:8080/level1/level2/?x=/../../", result);
    }


    @Test
    public void testBug53062j() throws Exception {
        Request req = new TesterRequest();
        Response resp = new Response();
        resp.setRequest(req);

        String result = resp.toAbsolute("./..?x=/../../");

        Assert.assertEquals("http://localhost:8080/level1/?x=/../../", result);
    }


    @Test
    public void testBug53062k() throws Exception {
        Request req = new TesterRequest();
        Response resp = new Response();
        resp.setRequest(req);

        String result = resp.toAbsolute("./..?x=/../..");

        Assert.assertEquals(
                "http://localhost:8080/level1/?x=/../..",
                result);
    }


    @Test
    public void testBug53062l() throws Exception {
        Request req = new TesterRequest();
        Response resp = new Response();
        resp.setRequest(req);

        String result = resp.toAbsolute("bar.html#/../");

        Assert.assertEquals(
                "http://localhost:8080/level1/level2/bar.html#/../", result);
    }


    @Test
    public void testBug53062m() throws Exception {
        Request req = new TesterRequest();
        Response resp = new Response();
        resp.setRequest(req);

        String result = resp.toAbsolute("bar.html#/../../");

        Assert.assertEquals(
                "http://localhost:8080/level1/level2/bar.html#/../../", result);
    }


    @Test
    public void testBug53062n() throws Exception {
        Request req = new TesterRequest();
        Response resp = new Response();
        resp.setRequest(req);

        String result = resp.toAbsolute("./.#/../../");

        Assert.assertEquals(
                "http://localhost:8080/level1/level2/#/../../", result);
    }


    @Test
    public void testBug53062o() throws Exception {
        Request req = new TesterRequest();
        Response resp = new Response();
        resp.setRequest(req);

        String result = resp.toAbsolute("./..#/../../");

        Assert.assertEquals("http://localhost:8080/level1/#/../../", result);
    }


    @Test
    public void testBug53062p() throws Exception {
        Request req = new TesterRequest();
        Response resp = new Response();
        resp.setRequest(req);

        String result = resp.toAbsolute("./..#/../..");

        Assert.assertEquals("http://localhost:8080/level1/#/../..", result);
    }


    @Test
    public void testBug53469a() throws Exception {
        Request req = new TesterRequest();
        Response resp = new Response();
        resp.setRequest(req);

        String result = resp.encodeURL("../bar.html");

        Assert.assertEquals("../bar.html", result);
    }


    @Test
    public void testBug53469b() throws Exception {
        Request req = new TesterRequest();
        Response resp = new Response();
        resp.setRequest(req);

        String result = resp.encodeURL("../../../../bar.html");

        Assert.assertEquals("../../../../bar.html", result);
    }


    private static final class Bug52811Servlet extends HttpServlet {
        private static final long serialVersionUID = 1L;

        @Override
        protected void doGet(HttpServletRequest req, HttpServletResponse resp)
                throws ServletException, IOException {

            resp.setContentType("multipart/related;" +
                    "boundary=1_4F50BD36_CDF8C28;" +
                    "Start=\"<31671603.smil>\";" +
                    "Type=\"application/smil;charset=UTF-8\"");

            // Should be ISO-8859-1 because the charset in the above is part
            // of the Type parameter
            PrintWriter pw = resp.getWriter();
            if (resp.getCharacterEncoding().equals("ISO-8859-1")) {
                pw.print("OK");
            } else {
                pw.print("FAIL: " + resp.getCharacterEncoding());
            }
        }

    }
}
