src/main/java/de/uapcore/lightpit/modules/ErrorModule.java

changeset 184
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parent 180
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183:61669abf277f 184:e8eecee6aadf
1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
3 *
4 * Copyright 2021 Mike Becker. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 *
28 */
29 package de.uapcore.lightpit.modules;
30
31 import de.uapcore.lightpit.AbstractServlet;
32 import de.uapcore.lightpit.HttpMethod;
33 import de.uapcore.lightpit.RequestMapping;
34
35 import javax.servlet.ServletException;
36 import javax.servlet.annotation.WebServlet;
37 import javax.servlet.http.HttpServletRequest;
38 import javax.servlet.http.HttpServletResponse;
39 import java.io.IOException;
40 import java.util.Optional;
41
42 @WebServlet(
43 name = "ErrorModule",
44 urlPatterns = "/error/*"
45 )
46 public final class ErrorModule extends AbstractServlet {
47
48 public static final String REQ_ATTR_RETURN_LINK = "returnLink";
49
50 @RequestMapping(requestPath = "generic", method = HttpMethod.GET)
51 public void onError(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
52 Optional.ofNullable(req.getHeader("Referer")).ifPresent(
53 referer -> req.setAttribute(REQ_ATTR_RETURN_LINK, referer)
54 );
55
56 setStylesheet(req, "error");
57 setContentPage(req, "error");
58
59 renderSite(req, resp);
60 }
61 }

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