1 | // Copyright 2012 Georg-August-Universität Göttingen, Germany |
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2 | // |
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3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
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4 | // you may not use this file except in compliance with the License. |
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5 | // You may obtain a copy of the License at |
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6 | // |
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7 | // http://www.apache.org/licenses/LICENSE-2.0 |
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8 | // |
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9 | // Unless required by applicable law or agreed to in writing, software |
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10 | // distributed under the License is distributed on an "AS IS" BASIS, |
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11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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12 | // See the License for the specific language governing permissions and |
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13 | // limitations under the License. |
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14 | |
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15 | package de.ugoe.cs.autoquest.httpmonitor; |
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16 | |
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17 | import java.io.IOException; |
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18 | |
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19 | import javax.servlet.ServletException; |
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20 | import javax.servlet.http.HttpServlet; |
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21 | import javax.servlet.http.HttpServletRequest; |
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22 | import javax.servlet.http.HttpServletResponse; |
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23 | import javax.xml.bind.JAXBContext; |
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24 | import javax.xml.bind.JAXBElement; |
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25 | import javax.xml.bind.JAXBException; |
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26 | import javax.xml.bind.Unmarshaller; |
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27 | |
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28 | import de.ugoe.cs.autoquest.httpmonitor.exchange.HttpExchange; |
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29 | import de.ugoe.cs.util.console.Console; |
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30 | |
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31 | /** |
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32 | * <p> |
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33 | * the servlet deployed in the web server that receives all recorded exchanges from the proxy. The |
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34 | * exchanges are parsed and forwarded to the provided exchange handler. If an exchange can not |
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35 | * be parsed it is discarded. Exchanges are only received via the POST HTTP method. |
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36 | * </p> |
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37 | * |
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38 | * @author Patrick Harms |
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39 | */ |
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40 | class HttpMonitorServlet extends HttpServlet { |
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41 | |
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42 | /** */ |
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43 | private static final long serialVersionUID = 1L; |
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44 | |
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45 | /** |
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46 | * the exchange handler to forward received exchanges to. |
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47 | */ |
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48 | private transient HttpMonitorExchangeHandler exchangeHandler; |
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49 | |
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50 | /** |
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51 | * <p> |
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52 | * initializes the servlet with the exchange handler to which all exchanges shall be forwarded |
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53 | * </p> |
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54 | * |
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55 | * @param exchangeHandler the exchange handler that shall receive all exchanges |
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56 | */ |
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57 | HttpMonitorServlet(HttpMonitorExchangeHandler exchangeHandler) { |
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58 | this.exchangeHandler = exchangeHandler; |
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59 | } |
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60 | |
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61 | /** |
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62 | * this implements handling of doPost. For this servlet this means that |
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63 | * the data from the post request will be parsed and the contained exchanges forwarded to the |
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64 | * exchange handler. |
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65 | * |
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66 | * (non-Javadoc) |
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67 | * @see org.mortbay.jetty.servlet.DefaultServlet#doPost(HttpServletRequest, HttpServletResponse) |
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68 | */ |
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69 | @Override |
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70 | protected void doPost(HttpServletRequest request, HttpServletResponse response) |
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71 | throws ServletException, IOException |
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72 | { |
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73 | try { |
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74 | JAXBContext jaxbContext = |
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75 | JAXBContext.newInstance(HttpExchange.class.getPackage().getName()); |
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76 | Unmarshaller unmarshaller = jaxbContext.createUnmarshaller(); |
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77 | |
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78 | @SuppressWarnings("unchecked") |
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79 | JAXBElement<HttpExchange> jaxObject = |
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80 | (JAXBElement<HttpExchange>) unmarshaller.unmarshal(request.getReader()); |
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81 | |
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82 | exchangeHandler.handleHttpExchange(jaxObject.getValue()); |
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83 | } |
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84 | catch (JAXBException e) { |
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85 | Console.printerrln |
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86 | ("could not parse incoming data --> discarding it (" + e.toString() + ")"); |
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87 | } |
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88 | } |
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89 | |
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90 | } |
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