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.annotations.restlet; |
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6 | |
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7 | import java.io.IOException; |
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8 | import java.util.ArrayList; |
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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.Reference; |
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18 | import org.restlet.data.Status; |
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19 | import org.restlet.ext.json.JsonRepresentation; |
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20 | import org.restlet.representation.Representation; |
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21 | import org.restlet.representation.StringRepresentation; |
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22 | import org.restlet.resource.Delete; |
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23 | import org.restlet.resource.Get; |
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24 | import org.restlet.resource.Post; |
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25 | import org.restlet.resource.Put; |
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26 | import org.restlet.security.User; |
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27 | |
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28 | import de.mpiwg.itgroup.annotationManager.Constants.NS; |
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29 | import de.mpiwg.itgroup.annotationManager.Errors.TripleStoreSearchError; |
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30 | import de.mpiwg.itgroup.annotationManager.Errors.TripleStoreStoreError; |
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31 | import de.mpiwg.itgroup.annotationManager.RDFHandling.Annotation; |
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32 | import de.mpiwg.itgroup.annotationManager.RDFHandling.Convert; |
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33 | import de.mpiwg.itgroup.annotationManager.RDFHandling.RDFSearcher; |
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34 | import de.mpiwg.itgroup.annotationManager.drupal.AnnotationHandler; |
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35 | import de.mpiwg.itgroup.annotationManager.drupal.UnknowUserException; |
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36 | import de.mpiwg.itgroup.triplestoremanager.exceptions.TripleStoreHandlerException; |
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37 | |
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38 | /** |
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39 | * Implements the "annotations" uri of the Annotator API. see <https://github.com/okfn/annotator/wiki/Storage> |
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40 | * |
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41 | * @author dwinter, casties |
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42 | * |
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43 | */ |
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44 | public class AnnotatorAnnotations extends AnnotatorResourceImpl { |
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45 | |
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46 | protected String getAllowedMethodsForHeader() { |
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47 | return "OPTIONS,GET,POST,PUT,DELETE"; |
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48 | } |
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49 | |
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50 | /** |
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51 | * GET with JSON content-type. |
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52 | * |
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53 | * @param entity |
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54 | * @return |
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55 | */ |
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56 | @Get("json") |
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57 | public Representation doGetJSON(Representation entity) { |
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58 | logger.debug("AnnotatorAnnotations doGetJSON!"); |
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59 | setCorsHeaders(); |
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60 | // id from URI /annotations/{id} |
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61 | String jsonId = (String) getRequest().getAttributes().get("id"); |
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62 | String id = decodeJsonId(jsonId); |
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63 | logger.debug("annotation-id=" + id); |
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64 | |
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65 | // TODO: what to return without id - list of all annotations? |
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66 | |
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67 | // TODO: what to do with authentication? |
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68 | boolean authenticated = isAuthenticated(entity); |
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69 | logger.debug("request authenticated=" + authenticated); |
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70 | |
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71 | RDFSearcher searcher = new RDFSearcher(NS.MPIWG_ANNOT_CTX); // TODO should ge into config file |
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72 | |
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73 | try { |
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74 | List<Annotation> annots = searcher.searchById(id); |
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75 | if (annots.size() == 1) { |
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76 | // there should be only one |
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77 | JSONObject result = createAnnotatorJson(annots.get(0)); |
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78 | logger.debug("sending:"); |
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79 | logger.debug(result); |
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80 | return new JsonRepresentation(result); |
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81 | } else { |
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82 | JSONArray results; |
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83 | results = new JSONArray(); |
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84 | for (Annotation annot : annots) { |
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85 | JSONObject jo = createAnnotatorJson(annot); |
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86 | if (jo != null) { |
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87 | results.put(createAnnotatorJson(annot)); |
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88 | } else { |
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89 | setStatus(Status.SERVER_ERROR_INTERNAL, "JSon Error"); |
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90 | return null; |
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91 | } |
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92 | } |
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93 | // annotator read request returns a list of annotation objects |
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94 | logger.debug("sending:"); |
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95 | logger.debug(results); |
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96 | return new JsonRepresentation(results); |
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97 | } |
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98 | } catch (TripleStoreHandlerException e) { |
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99 | e.printStackTrace(); |
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100 | setStatus(Status.SERVER_ERROR_INTERNAL, "TripleStoreHandler Error"); |
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101 | return null; |
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102 | } catch (TripleStoreSearchError e) { |
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103 | e.printStackTrace(); |
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104 | setStatus(Status.SERVER_ERROR_INTERNAL, "TripleStoreSearch Error"); |
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105 | return null; |
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106 | } |
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107 | } |
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108 | |
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109 | /** |
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110 | * POST with JSON content-type. |
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111 | * |
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112 | * json hash: username: name des users xpointer: xpointer auf den Ausschnitt (incl. der URL des Dokumentes) text: text der |
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113 | * annotation annoturl: url auf eine Annotation falls extern |
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114 | * |
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115 | * @return |
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116 | */ |
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117 | @Post("json") |
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118 | public Representation doPostJson(Representation entity) { |
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119 | logger.debug("AnnotatorAnnotations doPostJSON!"); |
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120 | // set headers |
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121 | setCorsHeaders(); |
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122 | Annotation annot = null; |
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123 | try { |
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124 | JsonRepresentation jrep = new JsonRepresentation(entity); |
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125 | JSONObject jo = jrep.getJsonObject(); |
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126 | if (jo == null) { |
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127 | setStatus(Status.SERVER_ERROR_INTERNAL); |
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128 | return null; |
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129 | } |
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130 | // make sure id is not set for POST |
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131 | jo.remove("id"); |
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132 | // get Annotation object from posted JSON |
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133 | annot = createAnnotation(jo, entity); |
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134 | } catch (IOException e1) { |
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135 | setStatus(Status.SERVER_ERROR_INTERNAL); |
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136 | return null; |
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137 | } catch (JSONException e) { |
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138 | setStatus(Status.CLIENT_ERROR_BAD_REQUEST); |
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139 | return null; |
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140 | } |
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141 | if (annot == null || annot.xpointer == null || annot.creator == null) { |
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142 | setStatus(Status.CLIENT_ERROR_BAD_REQUEST); |
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143 | return null; |
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144 | } |
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145 | Annotation storedAnnot; |
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146 | try { |
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147 | // store Annotation |
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148 | storedAnnot = new Convert(NS.MPIWG_ANNOT_CTX).storeAnnotation(annot); |
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149 | } catch (TripleStoreStoreError e) { |
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150 | e.printStackTrace(); |
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151 | setStatus(Status.SERVER_ERROR_INTERNAL, "TripleStore Error"); |
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152 | return null; |
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153 | } |
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154 | /* according to https://github.com/okfn/annotator/wiki/Storage |
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155 | * we should return 303: see other. |
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156 | * For now we return the annotation. |
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157 | */ |
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158 | JSONObject jo = createAnnotatorJson(storedAnnot); |
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159 | JsonRepresentation retRep = new JsonRepresentation(jo); |
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160 | return retRep; |
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161 | } |
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162 | |
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163 | /** |
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164 | * POST with HTML content-type. |
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165 | * |
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166 | * @param entity |
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167 | * @return |
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168 | */ |
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169 | @Post("html") |
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170 | public Representation doPostHtml(Representation entity) { |
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171 | logger.debug("AnnotatorAnnotations doPostHtml!"); |
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172 | Annotation annot; |
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173 | annot = handleForm(entity); |
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174 | if (annot.xpointer == null || annot.creator == null) { |
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175 | setStatus(Status.CLIENT_ERROR_BAD_REQUEST); |
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176 | |
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177 | return null; |
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178 | } |
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179 | |
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180 | Annotation retValAnnot; |
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181 | try { |
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182 | retValAnnot = new Convert(NS.MPIWG_ANNOT_CTX).storeAnnotation(annot); |
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183 | } catch (TripleStoreStoreError e) { |
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184 | e.printStackTrace(); |
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185 | setStatus(Status.SERVER_ERROR_INTERNAL, "TripleStore Error"); |
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186 | return null; |
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187 | } |
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188 | if (retValAnnot == null) { |
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189 | return null; |
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190 | } |
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191 | String retVal = retValAnnot.getAnnotationUri(); |
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192 | if (retVal == null) { |
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193 | return null; |
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194 | } |
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195 | |
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196 | String text = String.format("<html><body><a href=\"%s\">%s</a></body></html>", retVal.replace(">", "").replace("<", ""), |
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197 | retVal.replace(">", ">").replace("<", "<")); |
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198 | Representation retRep = new StringRepresentation(text, MediaType.TEXT_HTML); |
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199 | return retRep; |
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200 | } |
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201 | |
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202 | /** |
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203 | * |
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204 | * @param entity |
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205 | * should contain a form with the parameters "username", "password", "xpointer","text","uri","type" |
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206 | * |
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207 | * username,password is optional, if not given BasicAuthentification is used. |
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208 | * |
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209 | * 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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210 | * namespace defined in de.mpiwg.itgroup.annotationManager.Constants.NS |
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211 | * |
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212 | * @return |
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213 | */ |
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214 | protected Annotation handleForm(Representation entity) { |
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215 | Annotation annot; |
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216 | Form form = new Form(entity); |
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217 | String username = form.getValues("username"); |
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218 | String mode = form.getValues("mode"); |
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219 | String password = form.getValues("password"); |
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220 | String xpointer = form.getValues("xpointer"); |
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221 | String text = form.getValues("text"); |
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222 | String title = form.getValues("title"); |
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223 | String url = form.getValues("url"); |
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224 | String type = form.getValues("type"); |
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225 | RestServer restServer = (RestServer) getApplication(); |
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226 | |
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227 | // falls user and password nicht null sind: |
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228 | User userFromForm = null; |
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229 | if (username != null && password != null) { |
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230 | if (restServer.authenticate(username, password, getRequest())) { |
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231 | userFromForm = new User(username); |
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232 | } |
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233 | } |
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234 | User authUser = null; |
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235 | |
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236 | if (userFromForm == null) { |
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237 | authUser = getHttpAuthUser(entity); |
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238 | } |
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239 | |
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240 | // weder BasicAuth noch FormAuth |
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241 | if (authUser == null && userFromForm == null) { |
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242 | setStatus(Status.CLIENT_ERROR_FORBIDDEN); |
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243 | return null; |
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244 | } |
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245 | |
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246 | if (userFromForm != null) { |
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247 | username = userFromForm.getIdentifier(); |
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248 | } else { |
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249 | username = authUser.getIdentifier(); |
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250 | } |
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251 | |
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252 | // username should be a URI, if not it will set to the MPIWG namespace defined in |
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253 | // de.mpiwg.itgroup.annotationManager.Constants.NS |
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254 | String usernameOrig = username; |
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255 | if (!username.startsWith("http")) |
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256 | username = NS.MPIWG_PERSONS_URL + username; |
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257 | |
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258 | if (mode.equals("complexAnnotation")) {// Annotation mit text in externer ressource |
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259 | |
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260 | Context context = getContext(); |
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261 | String drupalPath = context.getParameters().getFirstValue("de.mpiwg.itgroup.annotationManager.drupalServer"); |
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262 | |
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263 | AnnotationHandler ah = new AnnotationHandler(drupalPath); |
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264 | JSONObject newAnnot; |
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265 | try { |
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266 | newAnnot = ah.createAnnotation(title, text, usernameOrig, password); |
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267 | } catch (UnknowUserException e1) { |
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268 | setStatus(Status.CLIENT_ERROR_FORBIDDEN); |
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269 | e1.printStackTrace(); |
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270 | return null; |
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271 | } |
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272 | try { |
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273 | annot = new Annotation(xpointer, username, null, text, type, newAnnot.getString("node_uri")); |
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274 | } catch (JSONException e) { |
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275 | // TODO Auto-generated catch block |
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276 | e.printStackTrace(); |
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277 | setStatus(Status.SERVER_ERROR_INTERNAL); |
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278 | return null; |
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279 | } |
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280 | } else |
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281 | annot = new Annotation(xpointer, username, null, text, type, url); |
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282 | return annot; |
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283 | } |
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284 | |
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285 | |
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286 | /** |
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287 | * PUT with JSON content-type. |
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288 | * |
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289 | * @param entity |
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290 | * @return |
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291 | */ |
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292 | @Put("json") |
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293 | public Representation doPutJSON(Representation entity) { |
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294 | logger.debug("AnnotatorAnnotations doPutJSON!"); |
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295 | setCorsHeaders(); |
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296 | // id from URI /annotations/{id} |
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297 | String jsonId = (String) getRequest().getAttributes().get("id"); |
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298 | String id = decodeJsonId(jsonId); |
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299 | logger.debug("annotation-id=" + id); |
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300 | |
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301 | // TODO: what to do with authentication? we should check the owner |
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302 | boolean authenticated = isAuthenticated(entity); |
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303 | logger.debug("request authenticated=" + authenticated); |
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304 | if (!authenticated) { |
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305 | setStatus(Status.CLIENT_ERROR_FORBIDDEN, "Not Authorized!"); |
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306 | return null; |
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307 | } |
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308 | |
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309 | Annotation annot = null; |
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310 | try { |
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311 | JsonRepresentation jrep = new JsonRepresentation(entity); |
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312 | JSONObject jo = jrep.getJsonObject(); |
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313 | if (jo == null) { |
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314 | setStatus(Status.CLIENT_ERROR_BAD_REQUEST); |
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315 | return null; |
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316 | } |
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317 | RDFSearcher searcher = new RDFSearcher(NS.MPIWG_ANNOT_CTX); // TODO should ge into config file |
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318 | // get stored Annotation |
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319 | List<Annotation> annots = searcher.searchById(id); |
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320 | if (annots.size() < 1) { |
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321 | setStatus(Status.CLIENT_ERROR_NOT_FOUND); |
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322 | return null; |
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323 | } |
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324 | Annotation storedAnnot = annots.get(0); |
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325 | // delete |
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326 | searcher.deleteById(id); |
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327 | // update from posted JSON |
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328 | annot = updateAnnotation(storedAnnot, jo, entity); |
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329 | // store Annotation |
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330 | storedAnnot = new Convert(NS.MPIWG_ANNOT_CTX).storeAnnotation(annot); |
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331 | /* according to https://github.com/okfn/annotator/wiki/Storage |
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332 | * we should return 303: see other. |
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333 | * but the client doesn't like it |
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334 | setStatus(Status.REDIRECTION_SEE_OTHER); |
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335 | // go to same URL as this one |
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336 | Reference thisUrl = this.getReference(); |
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337 | this.getResponse().setLocationRef(thisUrl); */ |
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338 | // return new annotation |
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339 | jo = createAnnotatorJson(storedAnnot); |
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340 | JsonRepresentation retRep = new JsonRepresentation(jo); |
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341 | return retRep; |
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342 | } catch (TripleStoreHandlerException e) { |
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343 | e.printStackTrace(); |
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344 | setStatus(Status.SERVER_ERROR_INTERNAL, "TripleStoreHandler Error"); |
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345 | } catch (TripleStoreSearchError e) { |
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346 | e.printStackTrace(); |
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347 | setStatus(Status.SERVER_ERROR_INTERNAL, "TripleStoreSearch Error"); |
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348 | } catch (JSONException e) { |
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349 | e.printStackTrace(); |
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350 | setStatus(Status.CLIENT_ERROR_BAD_REQUEST); |
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351 | } catch (IOException e) { |
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352 | e.printStackTrace(); |
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353 | setStatus(Status.SERVER_ERROR_INTERNAL, "Other Error"); |
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354 | } |
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355 | return null; |
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356 | } |
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357 | |
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358 | /** |
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359 | * DELETE with JSON content-type. |
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360 | * |
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361 | * @param entity |
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362 | * @return |
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363 | */ |
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364 | @Delete("json") |
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365 | public Representation doDeleteJSON(Representation entity) { |
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366 | logger.debug("AnnotatorAnnotations doDeleteJSON!"); |
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367 | setCorsHeaders(); |
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368 | // id from URI /annotations/{id} |
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369 | String jsonId = (String) getRequest().getAttributes().get("id"); |
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370 | String id = decodeJsonId(jsonId); |
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371 | logger.debug("annotation-id=" + id); |
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372 | |
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373 | // TODO: what to do with authentication? we should check the owner |
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374 | boolean authenticated = isAuthenticated(entity); |
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375 | logger.debug("request authenticated=" + authenticated); |
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376 | if (!authenticated) { |
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377 | setStatus(Status.CLIENT_ERROR_FORBIDDEN, "Not Authorized!"); |
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378 | return null; |
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379 | } |
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380 | |
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381 | RDFSearcher searcher = new RDFSearcher(NS.MPIWG_ANNOT_CTX); // TODO should ge into config file |
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382 | |
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383 | try { |
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384 | // delete annotation |
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385 | searcher.deleteById(id); |
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386 | setStatus(Status.SUCCESS_NO_CONTENT); |
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387 | } catch (TripleStoreHandlerException e) { |
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388 | e.printStackTrace(); |
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389 | setStatus(Status.SERVER_ERROR_INTERNAL, "TripleStoreHandler Error"); |
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390 | } catch (TripleStoreSearchError e) { |
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391 | e.printStackTrace(); |
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392 | setStatus(Status.SERVER_ERROR_INTERNAL, "TripleStoreSearch Error"); |
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393 | } |
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394 | return null; |
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395 | } |
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396 | |
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397 | |
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398 | } |
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