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.plugin.http; |
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16 | |
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17 | import java.io.ByteArrayInputStream; |
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18 | import java.io.File; |
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19 | import java.io.FileInputStream; |
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20 | import java.io.FileNotFoundException; |
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21 | import java.io.InputStream; |
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22 | import java.util.Collection; |
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23 | import java.util.LinkedList; |
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24 | import java.util.List; |
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25 | import java.util.logging.Level; |
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26 | |
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27 | import javax.xml.bind.JAXBContext; |
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28 | import javax.xml.bind.JAXBElement; |
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29 | import javax.xml.bind.JAXBException; |
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30 | import javax.xml.bind.Unmarshaller; |
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31 | import javax.xml.soap.MessageFactory; |
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32 | import javax.xml.soap.SOAPMessage; |
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33 | import javax.xml.transform.stream.StreamSource; |
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34 | |
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35 | import org.xml.sax.SAXException; |
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36 | |
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37 | import de.ugoe.cs.autoquest.eventcore.Event; |
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38 | import de.ugoe.cs.autoquest.eventcore.IEventType; |
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39 | import de.ugoe.cs.autoquest.plugin.http.eventcore.HTTPEventType; |
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40 | import de.ugoe.cs.autoquest.plugin.http.eventcore.HTTPTarget; |
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41 | import de.ugoe.cs.autoquest.plugin.http.eventcore.SOAPEventType; |
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42 | import de.ugoe.cs.autoquest.plugin.http.logdata.Content; |
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43 | import de.ugoe.cs.autoquest.plugin.http.logdata.HttpExchange; |
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44 | import de.ugoe.cs.autoquest.plugin.http.logdata.Session; |
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45 | import de.ugoe.cs.util.console.Console; |
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46 | |
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47 | /** |
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48 | * <p> |
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49 | * Parser for HTTP Monitor logs. Uses JAXB for parsing and is therefore quite simple. For each |
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50 | * exchange in the log, it creates an appropriate event. It differes between default HTTP events |
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51 | * and SOAP events. |
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52 | * </p> |
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53 | * |
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54 | * @author Patrick Harms |
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55 | */ |
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56 | public class HTTPLogParser { |
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57 | |
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58 | /** |
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59 | * <p> |
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60 | * the event sequences parsed by this parser |
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61 | * </p> |
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62 | */ |
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63 | private Collection<List<Event>> sequences = new LinkedList<List<Event>>(); |
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64 | |
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65 | /** |
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66 | * <p> |
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67 | * the message factory used for parsing SOAP messages |
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68 | * </p> |
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69 | */ |
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70 | private MessageFactory soapMessageFactory; |
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71 | |
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72 | /** |
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73 | * <p> |
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74 | * Parses a log file written by the HTTPMonitor and creates a collection of event sequences. |
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75 | * </p> |
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76 | * |
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77 | * @param filename |
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78 | * name and path of the log file |
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79 | * |
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80 | * @throws SAXException in the case, the file could not be parsed |
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81 | */ |
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82 | public void parseFile(String filename) throws JAXBException { |
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83 | if (filename == null) { |
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84 | throw new IllegalArgumentException("filename must not be null"); |
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85 | } |
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86 | |
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87 | parseFile(new File(filename)); |
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88 | } |
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89 | |
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90 | /** |
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91 | * <p> |
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92 | * Parses a log file written by the HTTPMonitor and creates a collection of event sequences. |
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93 | * </p> |
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94 | * |
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95 | * @param file |
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96 | * file to be parsed |
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97 | * |
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98 | * @throws SAXException in the case, the file could not be parsed |
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99 | */ |
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100 | public void parseFile(File file) throws JAXBException { |
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101 | if (file == null) { |
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102 | throw new IllegalArgumentException("file must not be null"); |
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103 | } |
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104 | |
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105 | try { |
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106 | parseFile(new FileInputStream(file)); |
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107 | } catch (FileNotFoundException e) { |
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108 | Console.printerr("Error parsing file + " + file.getName()); |
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109 | Console.logException(e); |
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110 | return; |
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111 | } |
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112 | } |
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113 | |
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114 | /** |
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115 | * <p> |
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116 | * Parses a log file written by the HTTPMonitor and creates a collection of event sequences. |
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117 | * </p> |
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118 | * |
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119 | * @param stream |
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120 | * file to be parsed |
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121 | * |
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122 | * @throws SAXException in the case, the file could not be parsed |
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123 | */ |
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124 | public void parseFile(InputStream stream) throws JAXBException { |
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125 | if (stream == null) { |
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126 | throw new IllegalArgumentException("stream must not be null"); |
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127 | } |
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128 | |
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129 | JAXBContext jc = JAXBContext.newInstance(Session.class.getPackage().getName()); |
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130 | |
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131 | Unmarshaller unmarshaller = jc.createUnmarshaller(); |
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132 | StreamSource source = new StreamSource(stream); |
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133 | |
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134 | @SuppressWarnings("unchecked") |
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135 | JAXBElement<Session> sessionObj = (JAXBElement<Session>) unmarshaller.unmarshal(source); |
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136 | |
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137 | Session session = sessionObj.getValue(); |
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138 | |
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139 | if ((session.getHttpExchange() != null) && (session.getHttpExchange().size() > 0)) { |
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140 | List<Event> sequence = new LinkedList<Event>(); |
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141 | for (HttpExchange exchange : session.getHttpExchange()) { |
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142 | sequence.add(new Event(createEvent(exchange), |
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143 | new HTTPTarget(exchange.getReceiver()))); |
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144 | } |
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145 | sequences.add(sequence); |
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146 | } |
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147 | |
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148 | } |
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149 | |
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150 | /** |
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151 | * <p> |
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152 | * instantiates the appropriate event type. If it encounters a SOAP exchange, a SOAP event type |
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153 | * is instantiated. Otherwise a normal HTTP event type is created. |
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154 | * </p> |
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155 | * |
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156 | * @param exchange the exchange for which an event type is to be created |
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157 | * |
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158 | * @return as described |
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159 | */ |
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160 | private IEventType createEvent(HttpExchange exchange) { |
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161 | Content requestContent = |
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162 | exchange.getRequest() != null ? exchange.getRequest().getContent() : null; |
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163 | |
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164 | SOAPMessage soapRequest = getSOAPMessage(requestContent); |
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165 | |
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166 | Content responseContent = |
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167 | exchange.getResponse() != null ? exchange.getResponse().getContent() : null; |
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168 | |
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169 | SOAPMessage soapResponse = getSOAPMessage(responseContent); |
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170 | |
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171 | if (soapRequest != null) { |
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172 | return new SOAPEventType(exchange, soapRequest, soapResponse); |
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173 | } |
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174 | else { |
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175 | return new HTTPEventType(exchange); |
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176 | } |
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177 | } |
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178 | |
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179 | /** |
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180 | * <p> |
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181 | * convenience method to convert the content of an HTTP request or response into a SOAP message |
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182 | * </p> |
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183 | * |
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184 | * @param content the content to be converted into a SOAP message |
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185 | * |
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186 | * @return the SOAP message contained in the content or null if either the content is null or |
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187 | * the content does not contain a SOAP message |
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188 | */ |
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189 | private SOAPMessage getSOAPMessage(Content content) { |
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190 | if ((content != null) && (content.getData() != null)) { |
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191 | try { |
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192 | if (soapMessageFactory == null) { |
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193 | soapMessageFactory = MessageFactory.newInstance(); |
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194 | } |
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195 | |
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196 | String encoding = content.getEncoding(); |
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197 | if (encoding == null) { |
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198 | encoding = "UTF-8"; |
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199 | } |
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200 | |
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201 | InputStream in = new ByteArrayInputStream(content.getData().getBytes(encoding)); |
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202 | SOAPMessage message = soapMessageFactory.createMessage(null, in); |
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203 | |
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204 | // try to access something to see, if everything worked fine. |
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205 | message.getSOAPHeader(); |
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206 | message.getSOAPBody(); |
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207 | |
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208 | return message; |
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209 | } |
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210 | catch (Exception e) { |
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211 | if (content.getData().toLowerCase().indexOf("envelope") > 0) { |
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212 | Console.traceln(Level.WARNING, "HTTP message seems to be a SOAP message but " + |
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213 | "it could not be parsed as such: " + e); |
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214 | //Console.logException(e); |
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215 | } |
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216 | } |
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217 | } |
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218 | |
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219 | return null; |
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220 | } |
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221 | |
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222 | /** |
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223 | * <p> |
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224 | * returns the sequences parsed by this parser |
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225 | * </p> |
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226 | * |
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227 | * @return as described |
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228 | */ |
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229 | public Collection<List<Event>> getSequences() { |
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230 | return sequences; |
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231 | } |
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232 | } |
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