[1374] | 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.proxy; |
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| 16 | |
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| 17 | import java.io.IOException; |
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| 18 | import java.io.OutputStreamWriter; |
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| 19 | import java.util.HashSet; |
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| 20 | import java.util.Set; |
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| 21 | import java.util.logging.Level; |
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| 22 | |
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| 23 | import javax.xml.bind.JAXBContext; |
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| 24 | import javax.xml.bind.JAXBException; |
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| 25 | import javax.xml.bind.Marshaller; |
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| 26 | |
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| 27 | import org.eclipse.jetty.client.HttpClient; |
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| 28 | import org.eclipse.jetty.client.api.Request; |
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| 29 | import org.eclipse.jetty.client.api.Response.CompleteListener; |
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| 30 | import org.eclipse.jetty.client.api.Result; |
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| 31 | import org.eclipse.jetty.client.util.OutputStreamContentProvider; |
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| 32 | import org.eclipse.jetty.http.HttpMethod; |
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| 33 | import org.eclipse.jetty.http.HttpVersion; |
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| 34 | import org.eclipse.jetty.util.thread.QueuedThreadPool; |
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| 35 | |
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[1382] | 36 | import de.ugoe.cs.autoquest.httpmonitor.HttpMonitor; |
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[1374] | 37 | import de.ugoe.cs.autoquest.httpmonitor.HttpMonitorComponent; |
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| 38 | import de.ugoe.cs.autoquest.httpmonitor.HttpMonitorException; |
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| 39 | import de.ugoe.cs.autoquest.httpmonitor.HttpMonitorExchangeHandler; |
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[1561] | 40 | import de.ugoe.cs.autoquest.plugin.http.logdata.HttpExchange; |
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| 41 | import de.ugoe.cs.autoquest.plugin.http.logdata.ObjectFactory; |
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[1374] | 42 | import de.ugoe.cs.util.console.Console; |
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| 43 | |
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| 44 | /** |
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| 45 | * <p> |
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[1382] | 46 | * If the exchanges recorded by the proxy are to be transmitted to a central {@link HttpMonitor}, |
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| 47 | * this exchanges handler is used. It is called by the exchange listener on completion of a proxied |
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| 48 | * request/response. It then creates an HTTP request to the central monitor and sends it there. |
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| 49 | * It is initialized with the name of the server and the port on which the central monitor runs. |
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| 50 | * If the exchanges can not be forwarded to the central server, they are discarded. |
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[1374] | 51 | * </p> |
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| 52 | * |
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| 53 | * @author Patrick Harms |
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| 54 | */ |
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| 55 | public class HttpMonitorRemoteExchangeHandler |
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| 56 | implements CompleteListener, HttpMonitorExchangeHandler, HttpMonitorComponent |
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| 57 | { |
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| 58 | |
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[1382] | 59 | /** |
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| 60 | * <p> |
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| 61 | * the HTTP client used internally to send data to the central server |
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| 62 | * </p> |
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| 63 | */ |
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[1374] | 64 | private HttpClient httpClient; |
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| 65 | |
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[1382] | 66 | /** |
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| 67 | * <p> |
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| 68 | * the host name of the central server |
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| 69 | * </p> |
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| 70 | */ |
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[1374] | 71 | private String httpMonitorServer; |
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| 72 | |
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[1382] | 73 | /** |
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| 74 | * <p> |
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| 75 | * the port of the central server |
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| 76 | * </p> |
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| 77 | */ |
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[1374] | 78 | private int httpMonitorPort; |
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| 79 | |
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[1382] | 80 | /** |
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| 81 | * <p> |
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| 82 | * a set of requests send to the central server for which the response was not received yet |
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| 83 | * </p> |
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| 84 | */ |
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[1374] | 85 | private Set<Request> openRequests = new HashSet<Request>(); |
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| 86 | |
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| 87 | /** |
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| 88 | * <p> |
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[1382] | 89 | * initializes the exchange handler with the host and port of the central server |
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[1374] | 90 | * </p> |
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| 91 | * |
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[1382] | 92 | * @param httpMonitorServer the host name of the central server |
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| 93 | * @param httpMonitorPort the port of the central server |
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[1374] | 94 | */ |
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| 95 | public HttpMonitorRemoteExchangeHandler(String httpMonitorServer, int httpMonitorPort) { |
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| 96 | this.httpMonitorServer = httpMonitorServer; |
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| 97 | this.httpMonitorPort = httpMonitorPort; |
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| 98 | } |
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| 99 | |
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| 100 | /* (non-Javadoc) |
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| 101 | * @see de.ugoe.cs.autoquest.httpmonitor.HttpMonitorComponent#init() |
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| 102 | */ |
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| 103 | @Override |
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| 104 | public void init() throws IllegalStateException, HttpMonitorException { |
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| 105 | httpClient = createHttpClient(); |
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| 106 | } |
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| 107 | |
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| 108 | /* (non-Javadoc) |
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| 109 | * @see de.ugoe.cs.autoquest.httpmonitor.HttpMonitorComponent#start() |
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| 110 | */ |
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| 111 | @Override |
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| 112 | public void start() throws IllegalStateException, HttpMonitorException { |
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| 113 | try { |
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| 114 | httpClient.start(); |
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| 115 | httpClient.getContentDecoderFactories().clear(); |
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| 116 | } |
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| 117 | catch (Exception e) { |
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| 118 | throw new HttpMonitorException("could not start client for HTTP-Monitor", e); |
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| 119 | } |
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| 120 | } |
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| 121 | |
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| 122 | /* (non-Javadoc) |
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| 123 | * @see de.ugoe.cs.autoquest.httpmonitor.HttpMonitorComponent#stop() |
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| 124 | */ |
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| 125 | @Override |
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| 126 | public void stop() { |
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| 127 | if (httpClient != null) { |
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| 128 | try { |
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| 129 | httpClient.stop(); |
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| 130 | } |
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| 131 | catch (Exception e) { |
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| 132 | Console.traceln(Level.WARNING, "could not stop client for HTTP-Monitor"); |
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| 133 | Console.logException(e); |
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| 134 | } |
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| 135 | } |
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| 136 | |
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| 137 | httpClient = null; |
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| 138 | } |
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| 139 | |
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| 140 | /* (non-Javadoc) |
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| 141 | * @see de.ugoe.cs.autoquest.httpmonitor.HttpMonitorExchangeHandler#handleHttpExchange() |
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| 142 | */ |
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| 143 | @Override |
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| 144 | public void handleHttpExchange(HttpExchange httpExchange) { |
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| 145 | // send the exchange to the server and wait for completion |
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| 146 | synchronized (openRequests) { |
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| 147 | Request httpMonitorRequest = httpClient.newRequest(httpMonitorServer, httpMonitorPort); |
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| 148 | httpMonitorRequest.method(HttpMethod.POST); |
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| 149 | httpMonitorRequest.version(HttpVersion.HTTP_1_1); |
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| 150 | |
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| 151 | OutputStreamContentProvider out = new OutputStreamContentProvider(); |
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| 152 | httpMonitorRequest.content(out); |
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| 153 | httpMonitorRequest.send(this); |
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| 154 | |
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| 155 | try { |
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| 156 | JAXBContext jaxbContext = |
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| 157 | JAXBContext.newInstance(HttpExchange.class.getPackage().getName()); |
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| 158 | Marshaller marshaller = jaxbContext.createMarshaller(); |
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| 159 | |
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[1381] | 160 | OutputStreamWriter writer = new OutputStreamWriter(out.getOutputStream(), "UTF-8"); |
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[1374] | 161 | marshaller.marshal(new ObjectFactory().createHttpExchange(httpExchange), writer); |
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| 162 | |
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| 163 | out.getOutputStream().close(); |
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| 164 | } |
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| 165 | catch (JAXBException e) { |
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| 166 | Console.printerrln("could not convert request and response to XML string: " + e); |
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| 167 | Console.logException(e); |
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| 168 | } |
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| 169 | catch (IOException e) { |
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| 170 | Console.printerrln |
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| 171 | ("could not close the stream for sending data to the HTML monitor: " + e); |
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| 172 | Console.logException(e); |
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| 173 | } |
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| 174 | |
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| 175 | openRequests.add(httpMonitorRequest); |
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| 176 | |
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| 177 | try { |
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| 178 | // wait for the request to be removed fromt the list asynchronously |
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| 179 | while (openRequests.contains(httpMonitorRequest)) { |
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| 180 | openRequests.wait(); |
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| 181 | } |
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| 182 | } |
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| 183 | catch (InterruptedException e) { |
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| 184 | // ignore, as this may only happen on system shutdown |
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| 185 | } |
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| 186 | } |
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| 187 | } |
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| 188 | |
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| 189 | /* (non-Javadoc) |
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| 190 | * @see org.eclipse.jetty.client.api.Response.CompleteListener#onComplete(Result) |
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| 191 | */ |
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| 192 | @Override |
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| 193 | public void onComplete(Result result) { |
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| 194 | if (result.isFailed()) { |
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| 195 | Console.traceln |
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| 196 | (Level.WARNING, "could not log exchange correctly: " + result.getFailure()); |
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| 197 | Console.logException((Exception) result.getFailure()); |
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| 198 | } |
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| 199 | |
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| 200 | synchronized (openRequests) { |
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| 201 | openRequests.remove(result.getRequest()); |
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| 202 | openRequests.notify(); |
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| 203 | } |
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| 204 | } |
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| 205 | |
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| 206 | /** |
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[1382] | 207 | * <p> |
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| 208 | * convenience method to create an initialize the utilized HTTP client |
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| 209 | * </p> |
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[1374] | 210 | */ |
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| 211 | private HttpClient createHttpClient() { |
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| 212 | HttpClient client = new HttpClient(); |
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| 213 | |
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| 214 | QueuedThreadPool executor = new QueuedThreadPool(10); |
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| 215 | executor.setName("HttpMonitorClients"); |
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| 216 | client.setExecutor(executor); |
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| 217 | |
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| 218 | client.setMaxConnectionsPerDestination(10000); |
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| 219 | client.setIdleTimeout(30000); |
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[1395] | 220 | client.setConnectTimeout(30000); |
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| 221 | client.setStopTimeout(30000); |
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[1374] | 222 | client.setRequestBufferSize(1024*1024); |
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| 223 | client.setResponseBufferSize(1024*1024); |
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| 224 | |
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| 225 | return client; |
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| 226 | } |
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| 227 | } |
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