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1 /**
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2 * Implements the "annotations" uri of the Annotator API. see
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3 * <https://github.com/okfn/annotator/wiki/Storage>
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4 */
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5 package de.mpiwg.itgroup.annotationManager.restlet;
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6
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7 import java.io.IOException;
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17
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8 import java.util.ArrayList;
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11
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9 import java.util.List;
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10
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11 import org.json.JSONArray;
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12 import org.json.JSONException;
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13 import org.json.JSONObject;
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14 import org.restlet.Context;
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15 import org.restlet.data.Form;
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16 import org.restlet.data.MediaType;
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17 import org.restlet.data.Status;
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18 import org.restlet.ext.json.JsonRepresentation;
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19 import org.restlet.representation.Representation;
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20 import org.restlet.representation.StringRepresentation;
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17
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21 import org.restlet.resource.Delete;
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11
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22 import org.restlet.resource.Get;
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23 import org.restlet.resource.Post;
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17
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24 import org.restlet.resource.Put;
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11
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25 import org.restlet.security.User;
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26
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27 import de.mpiwg.itgroup.annotationManager.Constants.NS;
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28 import de.mpiwg.itgroup.annotationManager.Errors.TripleStoreSearchError;
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29 import de.mpiwg.itgroup.annotationManager.Errors.TripleStoreStoreError;
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17
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30 import de.mpiwg.itgroup.annotationManager.RDFHandling.Annotation;
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11
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31 import de.mpiwg.itgroup.annotationManager.RDFHandling.Convert;
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32 import de.mpiwg.itgroup.annotationManager.RDFHandling.RDFSearcher;
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33 import de.mpiwg.itgroup.annotationManager.drupal.AnnotationHandler;
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34 import de.mpiwg.itgroup.annotationManager.drupal.UnknowUserException;
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35 import de.mpiwg.itgroup.triplestoremanager.exceptions.TripleStoreHandlerException;
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36
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37 /**
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38 * Implements the "annotations" uri of the Annotator API. see <https://github.com/okfn/annotator/wiki/Storage>
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39 *
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40 * @author dwinter, casties
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41 *
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42 */
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43 public class AnnotatorAnnotations extends AnnotatorResourceImpl {
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44
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45 protected String getAllowedMethodsForHeader() {
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46 return "OPTIONS,GET,POST,PUT,DELETE";
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47 }
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48
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49 /**
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50 * GET with JSON content-type.
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51 *
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52 * @param entity
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53 * @return
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54 */
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55 @Get("json")
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56 public Representation doGetJSON(Representation entity) {
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13
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57 logger.debug("AnnotatorAnnotations doGetJSON!");
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58 setCorsHeaders();
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59 // id from URI /annotations/{id}
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60 String jsonId = (String) getRequest().getAttributes().get("id");
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61 String id = decodeJsonId(jsonId);
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62 logger.debug("annotation-id=" + id);
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63
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64 // TODO: what to return without id - list of all annotations?
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65
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66 // TODO: what to do with authentication?
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67 boolean authenticated = isAuthenticated(entity);
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68 logger.debug("request authenticated=" + authenticated);
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69
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70 RDFSearcher searcher = new RDFSearcher("file:///annotations"); // TODO should ge into config file
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71
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72 try {
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73 List<Annotation> annots = searcher.searchById(id);
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74 if (annots.size() == 1) {
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75 // there should be only one
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76 JSONObject result = createAnnotatorJson(annots.get(0));
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77 logger.debug("sending:");
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78 logger.debug(result);
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79 return new JsonRepresentation(result);
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80 } else {
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81 JSONArray results;
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82 results = new JSONArray();
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83 for (Annotation annot : annots) {
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84 JSONObject jo = createAnnotatorJson(annot);
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85 if (jo != null) {
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86 results.put(createAnnotatorJson(annot));
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87 } else {
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88 setStatus(Status.SERVER_ERROR_INTERNAL, "JSon Error");
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89 return null;
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90 }
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11
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91 }
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92 // annotator read request returns a list of annotation objects
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93 logger.debug("sending:");
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94 logger.debug(results);
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95 return new JsonRepresentation(results);
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11
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96 }
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97 } catch (TripleStoreHandlerException e) {
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98 e.printStackTrace();
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99 setStatus(Status.SERVER_ERROR_INTERNAL, "TripleStoreHandler Error");
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100 return null;
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101 } catch (TripleStoreSearchError e) {
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102 e.printStackTrace();
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103 setStatus(Status.SERVER_ERROR_INTERNAL, "TripleStoreSearch Error");
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104 return null;
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105 }
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106 }
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107
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108 /**
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109 * POST with JSON content-type.
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110 *
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111 * json hash: username: name des users xpointer: xpointer auf den Ausschnitt (incl. der URL des Dokumentes) text: text der
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112 * annotation annoturl: url auf eine Annotation falls extern
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11
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113 *
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114 * @return
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115 */
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116 @Post("json")
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117 public Representation doPostJson(Representation entity) {
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13
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118 logger.debug("AnnotatorAnnotations doPostJSON!");
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119 // set headers
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120 setCorsHeaders();
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121 Annotation annot = null;
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122 try {
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123 JsonRepresentation jrep = new JsonRepresentation(entity);
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124 JSONObject jo = jrep.getJsonObject();
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125 if (jo == null) {
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126 setStatus(Status.SERVER_ERROR_INTERNAL);
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127 return null;
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128 }
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17
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129 // make sure id is not set for POST
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130 jo.remove("id");
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13
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131 // get Annotation object from posted JSON
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132 annot = createAnnotation(jo, entity);
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133 } catch (IOException e1) {
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134 setStatus(Status.SERVER_ERROR_INTERNAL);
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135 return null;
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136 } catch (JSONException e) {
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137 setStatus(Status.CLIENT_ERROR_BAD_REQUEST);
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138 return null;
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139 }
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140 if (annot == null || annot.xpointer == null || annot.creator == null) {
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141 setStatus(Status.CLIENT_ERROR_BAD_REQUEST);
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142 return null;
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143 }
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144 Annotation storedAnnot;
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145 try {
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146 // store Annotation
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147 storedAnnot = new Convert("file:///annotations").storeAnnotation(annot);
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11
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148 } catch (TripleStoreStoreError e) {
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149 e.printStackTrace();
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150 setStatus(Status.SERVER_ERROR_INTERNAL, "TripleStore Error");
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151 return null;
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152 }
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153 // return stored annotation
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154 JSONObject jo = createAnnotatorJson(storedAnnot);
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155 JsonRepresentation retRep = new JsonRepresentation(jo);
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156 return retRep;
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157 }
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158
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159 /**
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160 * POST with HTML content-type.
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161 *
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162 * @param entity
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163 * @return
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164 */
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165 @Post("html")
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166 public Representation doPostHtml(Representation entity) {
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167 logger.debug("AnnotatorAnnotations doPostHtml!");
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168 Annotation annot;
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169 annot = handleForm(entity);
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170 if (annot.xpointer == null || annot.creator == null) {
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171 setStatus(Status.CLIENT_ERROR_BAD_REQUEST);
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172
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173 return null;
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174 }
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175
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176 Annotation retValAnnot;
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177 try {
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178 retValAnnot = new Convert("file:///annotations").storeAnnotation(annot);
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179 } catch (TripleStoreStoreError e) {
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180 e.printStackTrace();
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181 setStatus(Status.SERVER_ERROR_INTERNAL, "TripleStore Error");
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182 return null;
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183 }
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184 if (retValAnnot == null) {
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185 return null;
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186 }
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187 String retVal = retValAnnot.getAnnotationUri();
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188 if (retVal == null) {
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189 return null;
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190 }
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191
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192 String text = String.format("<html><body><a href=\"%s\">%s</a></body></html>", retVal.replace(">", "").replace("<", ""),
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193 retVal.replace(">", ">").replace("<", "<"));
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194 Representation retRep = new StringRepresentation(text, MediaType.TEXT_HTML);
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195 return retRep;
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196 }
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197
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198 /**
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199 *
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200 * @param entity
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201 * should contain a form with the parameters "username", "password", "xpointer","text","uri","type"
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202 *
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203 * username,password is optional, if not given BasicAuthentification is used.
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11
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204 *
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205 * If username given as a URI, the username will be transformed to an URI, username will be added to the MPIWG
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206 * namespace defined in de.mpiwg.itgroup.annotationManager.Constants.NS
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11
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207 *
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208 * @return
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209 */
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210 protected Annotation handleForm(Representation entity) {
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211 Annotation annot;
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212 Form form = new Form(entity);
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213 String username = form.getValues("username");
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214 String mode = form.getValues("mode");
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215 String password = form.getValues("password");
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216 String xpointer = form.getValues("xpointer");
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217 String text = form.getValues("text");
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218 String title = form.getValues("title");
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219 String url = form.getValues("url");
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220 String type = form.getValues("type");
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221 RestServer restServer = (RestServer) getApplication();
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222
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223 // falls user and password nicht null sind:
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224 User userFromForm = null;
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225 if (username != null && password != null) {
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226 if (restServer.authenticate(username, password, getRequest())) {
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227 userFromForm = new User(username);
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228 }
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229 }
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230 User authUser = null;
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231
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232 if (userFromForm == null) {
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233 authUser = getHttpAuthUser(entity);
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234 }
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235
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236 // weder BasicAuth noch FormAuth
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237 if (authUser == null && userFromForm == null) {
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238 setStatus(Status.CLIENT_ERROR_FORBIDDEN);
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239 return null;
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240 }
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241
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242 if (userFromForm != null) {
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243 username = userFromForm.getIdentifier();
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244 } else {
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245 username = authUser.getIdentifier();
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246 }
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247
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248 // username should be a URI, if not it will set to the MPIWG namespace defined in
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249 // de.mpiwg.itgroup.annotationManager.Constants.NS
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250 String usernameOrig = username;
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251 if (!username.startsWith("http"))
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252 username = NS.MPIWG_PERSONS + username;
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253
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254 if (mode.equals("complexAnnotation")) {// Annotation mit text in externer ressource
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255
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256 Context context = getContext();
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257 String drupalPath = context.getParameters().getFirstValue("de.mpiwg.itgroup.annotationManager.drupalServer");
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258
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259 AnnotationHandler ah = new AnnotationHandler(drupalPath);
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260 JSONObject newAnnot;
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261 try {
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262 newAnnot = ah.createAnnotation(title, text, usernameOrig, password);
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263 } catch (UnknowUserException e1) {
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264 setStatus(Status.CLIENT_ERROR_FORBIDDEN);
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265 e1.printStackTrace();
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266 return null;
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267 }
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268 try {
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269 annot = new Annotation(xpointer, username, null, text, type, newAnnot.getString("node_uri"));
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270 } catch (JSONException e) {
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271 // TODO Auto-generated catch block
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272 e.printStackTrace();
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273 setStatus(Status.SERVER_ERROR_INTERNAL);
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274 return null;
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275 }
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276 } else
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277 annot = new Annotation(xpointer, username, null, text, type, url);
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278 return annot;
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279 }
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280
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281
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282 /**
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283 * PUT with JSON content-type.
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284 *
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285 * @param entity
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286 * @return
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287 */
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288 @Put("json")
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289 public Representation doPutJSON(Representation entity) {
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290 logger.debug("AnnotatorAnnotations doPutJSON!");
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291 setCorsHeaders();
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292 // id from URI /annotations/{id}
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293 String jsonId = (String) getRequest().getAttributes().get("id");
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294 String id = decodeJsonId(jsonId);
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295 logger.debug("annotation-id=" + id);
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296
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297 // TODO: what to do with authentication? we should check the owner
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298 boolean authenticated = isAuthenticated(entity);
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299 logger.debug("request authenticated=" + authenticated);
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300 if (!authenticated) {
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301 setStatus(Status.CLIENT_ERROR_FORBIDDEN, "Not Authorized!");
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302 return null;
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303 }
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304
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305 Annotation annot = null;
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306 try {
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307 JsonRepresentation jrep = new JsonRepresentation(entity);
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308 JSONObject jo = jrep.getJsonObject();
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309 if (jo == null) {
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310 setStatus(Status.CLIENT_ERROR_BAD_REQUEST);
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311 return null;
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312 }
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313 RDFSearcher searcher = new RDFSearcher("file:///annotations"); // TODO should ge into config file
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314 // get stored Annotation
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315 List<Annotation> annots = searcher.searchById(id);
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316 if (annots.size() < 1) {
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317 setStatus(Status.CLIENT_ERROR_NOT_FOUND);
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318 return null;
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319 }
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320 Annotation storedAnnot = annots.get(0);
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321 // delete
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322 searcher.deleteById(id);
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323 // update from posted JSON
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324 annot = updateAnnotation(storedAnnot, jo, entity);
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325 // store Annotation
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326 storedAnnot = new Convert("file:///annotations").storeAnnotation(annot);
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327 /* according to https://github.com/okfn/annotator/wiki/Storage
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328 * we should return 303: see other
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329 * setStatus(Status.REDIRECTION_SEE_OTHER, "go to GET");
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330 */
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331 setStatus(Status.SUCCESS_NO_CONTENT);
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332 } catch (TripleStoreHandlerException e) {
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333 e.printStackTrace();
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334 setStatus(Status.SERVER_ERROR_INTERNAL, "TripleStoreHandler Error");
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335 return null;
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336 } catch (TripleStoreSearchError e) {
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337 e.printStackTrace();
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338 setStatus(Status.SERVER_ERROR_INTERNAL, "TripleStoreSearch Error");
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339 return null;
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340 } catch (JSONException e) {
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341 e.printStackTrace();
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342 setStatus(Status.CLIENT_ERROR_BAD_REQUEST);
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343 return null;
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344 } catch (IOException e) {
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345 e.printStackTrace();
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346 setStatus(Status.SERVER_ERROR_INTERNAL, "Other Error");
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347 return null;
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348 }
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349 return null;
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350 }
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351
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352 /**
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353 * DELETE with JSON content-type.
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354 *
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355 * @param entity
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356 * @return
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357 */
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358 @Delete("json")
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359 public Representation doDeleteJSON(Representation entity) {
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360 logger.debug("AnnotatorAnnotations doDeleteJSON!");
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361 setCorsHeaders();
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362 // id from URI /annotations/{id}
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363 String jsonId = (String) getRequest().getAttributes().get("id");
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364 String id = decodeJsonId(jsonId);
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365 logger.debug("annotation-id=" + id);
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366
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367 // TODO: what to do with authentication? we should check the owner
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368 boolean authenticated = isAuthenticated(entity);
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369 logger.debug("request authenticated=" + authenticated);
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370 if (!authenticated) {
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371 setStatus(Status.CLIENT_ERROR_FORBIDDEN, "Not Authorized!");
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372 return null;
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373 }
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374
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375 RDFSearcher searcher = new RDFSearcher("file:///annotations"); // TODO should ge into config file
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376
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377 try {
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378 // delete annotation
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379 searcher.deleteById(id);
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380 setStatus(Status.SUCCESS_NO_CONTENT);
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381 } catch (TripleStoreHandlerException e) {
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382 e.printStackTrace();
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383 setStatus(Status.SERVER_ERROR_INTERNAL, "TripleStoreHandler Error");
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384 } catch (TripleStoreSearchError e) {
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385 e.printStackTrace();
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386 setStatus(Status.SERVER_ERROR_INTERNAL, "TripleStoreSearch Error");
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387 }
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388 return null;
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389 }
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390
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391
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11
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392 }
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