1 | package org.greenstone.gsdl3.action;
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2 |
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3 | import java.io.File;
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4 | import java.io.Serializable;
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5 | import java.util.HashMap;
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6 |
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7 | import javax.xml.parsers.DocumentBuilder;
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8 | import javax.xml.parsers.DocumentBuilderFactory;
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9 | import javax.xml.transform.Result;
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10 | import javax.xml.transform.Transformer;
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11 | import javax.xml.transform.TransformerFactory;
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12 | import javax.xml.transform.dom.DOMSource;
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13 | import javax.xml.transform.stream.StreamResult;
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14 |
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15 | import org.greenstone.gsdl3.util.GSFile;
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16 | import org.greenstone.gsdl3.util.GSParams;
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17 | import org.greenstone.gsdl3.util.GSPath;
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18 | import org.greenstone.gsdl3.util.GSXML;
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19 | import org.greenstone.gsdl3.util.UserContext;
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20 | import org.greenstone.util.GlobalProperties;
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21 | import org.w3c.dom.Document;
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22 | import org.w3c.dom.Element;
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23 | import org.w3c.dom.Node;
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24 | import org.w3c.dom.NodeList;
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25 |
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26 | public class GeneralAction extends Action
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27 | {
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28 |
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29 | /** process a request */
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30 | public Node process(Node message_node)
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31 | {
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32 | Element message = GSXML.nodeToElement(message_node);
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33 | Document doc = message.getOwnerDocument();
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34 |
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35 | // the result
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36 | Element result = doc.createElement(GSXML.MESSAGE_ELEM);
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37 | Element page_response = doc.createElement(GSXML.RESPONSE_ELEM);
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38 | result.appendChild(page_response);
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39 |
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40 | // assume only one request
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41 | Element request = (Element) GSXML.getChildByTagName(message, GSXML.REQUEST_ELEM);
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42 | logger.debug(" request=" + this.converter.getString(request));
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43 |
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44 | UserContext userContext = new UserContext(request);
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45 |
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46 | // get the param list
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47 | Element cgi_param_list = (Element) GSXML.getChildByTagName(request, GSXML.PARAM_ELEM + GSXML.LIST_MODIFIER);
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48 | HashMap<String, Serializable> params = GSXML.extractParams(cgi_param_list, false);
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49 |
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50 | if (params.get("configChangeName") != null && params.get("configChangeValue") != null)
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51 | {
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52 | String optionName = (String) params.get("configChangeName");
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53 | String optionValue = (String) params.get("configChangeValue");
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54 |
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55 | changeConfig(optionName, optionValue);
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56 | }
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57 |
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58 | String service_name = (String) params.get(GSParams.SERVICE);
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59 | String cluster_name = (String) params.get(GSParams.CLUSTER);
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60 | String response_only_p = (String) params.get(GSParams.RESPONSE_ONLY);
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61 | boolean response_only = false;
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62 | if (response_only_p != null)
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63 | {
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64 | response_only = (response_only_p.equals("1") ? true : false);
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65 | }
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66 | String request_type = (String) params.get(GSParams.REQUEST_TYPE);
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67 | // what is carried out depends on the request_type
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68 | // if rt=d, then a describe request is done,
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69 | // is rt=r, a request and then a describe request is done
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70 | // if rt=s, a status request is done.
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71 |
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72 | // if ro=1, then this calls for a process only page - we do the request
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73 | // (rt should be r or s) and just give the response straight back
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74 | // without any page processing
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75 |
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76 | // where to send requests
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77 | String to;
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78 | if (cluster_name != null)
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79 | {
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80 | to = GSPath.appendLink(cluster_name, service_name);
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81 | }
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82 | else
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83 | {
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84 | to = service_name;
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85 | }
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86 |
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87 | if (request_type.equals("r") || request_type.equals("s") || request_type.equals("ro"))
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88 | {
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89 | //do the request
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90 | Element mr_query_message = doc.createElement(GSXML.MESSAGE_ELEM);
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91 | Element mr_query_request = GSXML.createBasicRequest(doc, GSXML.REQUEST_TYPE_PROCESS, to, userContext);
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92 |
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93 | if (request_type.equals("s"))
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94 | {
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95 | mr_query_request.setAttribute(GSXML.TYPE_ATT, GSXML.REQUEST_TYPE_STATUS);
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96 | }
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97 |
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98 | mr_query_message.appendChild(mr_query_request);
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99 |
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100 | Element param_list = null;
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101 | // add in the service params - except the ones only used by the action
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102 | HashMap service_params = (HashMap) params.get("s1");
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103 | if (service_params != null)
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104 | {
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105 | param_list = doc.createElement(GSXML.PARAM_ELEM + GSXML.LIST_MODIFIER);
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106 | GSXML.addParametersToList(param_list, service_params);
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107 | mr_query_request.appendChild(param_list);
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108 | }
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109 |
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110 | Element userInformation = (Element) GSXML.getChildByTagName(request, GSXML.USER_INFORMATION_ELEM);
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111 | if (userInformation != null)
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112 | {
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113 | mr_query_request.appendChild(doc.importNode(userInformation, true));
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114 | }
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115 | mr_query_request.setAttribute("remoteAddress", request.getAttribute("remoteAddress"));
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116 |
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117 | Element mr_query_response = (Element) this.mr.process(mr_query_message);
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118 | Element result_response = (Element) GSXML.getChildByTagName(mr_query_response, GSXML.RESPONSE_ELEM);
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119 |
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120 | if (response_only)
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121 | {
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122 | // just send the reponse as is
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123 | addSiteMetadata(result_response, userContext);
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124 | addInterfaceOptions(result_response);
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125 | return result_response;
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126 | }
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127 | if (result_response != null)
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128 | {
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129 | // else append the contents of the response to the page
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130 | GSXML.copyAllChildren(page_response, result_response);
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131 | }
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132 | }
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133 |
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134 | // another part of the page is the service description
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135 |
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136 | // request the service info for the selected service - should be cached
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137 | Element mr_info_message = doc.createElement(GSXML.MESSAGE_ELEM);
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138 | Element mr_info_request = GSXML.createBasicRequest(doc, GSXML.REQUEST_TYPE_DESCRIBE, to, userContext);
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139 | mr_info_message.appendChild(mr_info_request);
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140 | Element mr_info_response = (Element) this.mr.process(mr_info_message);
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141 |
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142 | String path = GSXML.RESPONSE_ELEM;
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143 | path = GSPath.appendLink(path, GSXML.SERVICE_ELEM);
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144 |
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145 | Node desNode = GSXML.getNodeByPath(mr_info_response, path);
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146 | if (desNode != null)
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147 | {
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148 | page_response.appendChild((Element) doc.importNode(desNode, true));
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149 | }
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150 |
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151 | addSiteMetadata(page_response, userContext);
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152 | addInterfaceOptions(page_response);
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153 |
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154 | return result;
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155 | }
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156 |
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157 | protected void changeConfig(String optionName, String optionValue)
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158 | {
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159 | if (this.config_params.get(optionName) != null)
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160 | {
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161 | this.config_params.put(optionName, optionValue);
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162 |
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163 | File interfaceConfigFile = new File(GSFile.interfaceConfigFile(GSFile.interfaceHome(GlobalProperties.getGSDL3Home(), (String) this.config_params.get("interface_name"))));
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164 |
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165 | Document interfaceXML = null;
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166 | try
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167 | {
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168 | DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
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169 | DocumentBuilder db = dbf.newDocumentBuilder();
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170 | interfaceXML = db.parse(interfaceConfigFile);
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171 | Element topElement = interfaceXML.getDocumentElement();
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172 | Element optionListElem = (Element) GSXML.getChildByTagName(topElement, "optionList");
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173 |
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174 | NodeList optionList = optionListElem.getElementsByTagName("option");
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175 |
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176 | for (int i = 0; i < optionList.getLength(); i++)
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177 | {
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178 | Element currentOption = (Element) optionList.item(i);
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179 | if (currentOption.getAttribute(GSXML.NAME_ATT) != null && currentOption.getAttribute(GSXML.NAME_ATT).equals(optionName))
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180 | {
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181 | currentOption.setAttribute(GSXML.VALUE_ATT, optionValue);
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182 | }
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183 | }
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184 |
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185 | DOMSource source = new DOMSource(interfaceXML);
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186 | Result xmlresult = new StreamResult(interfaceConfigFile);
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187 |
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188 | Transformer transformer = TransformerFactory.newInstance().newTransformer();
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189 | transformer.transform(source, xmlresult);
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190 | }
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191 | catch (Exception ex)
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192 | {
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193 | ex.printStackTrace();
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194 | }
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195 | }
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196 | else
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197 | {
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198 | logger.error("Could not set param \"" + optionName + "\" to \"" + optionValue + "\" because that option does not exist.");
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199 | }
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200 | }
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201 | }
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