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1 /** Copyright (C) 2017 by Bundesanstalt für Gewässerkunde |
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2 * Software engineering by |
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3 * Björnsen Beratende Ingenieure GmbH |
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4 * Dr. Schumacher Ingenieurbüro für Wasser und Umwelt |
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5 * |
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6 * This file is Free Software under the GNU AGPL (>=v3) |
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7 * and comes with ABSOLUTELY NO WARRANTY! Check out the |
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8 * documentation coming with Dive4Elements River for details. |
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9 */ |
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10 package org.dive4elements.river.artifacts.uinfo.inundationduration; |
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11 |
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12 import java.awt.image.BufferedImage; |
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13 import java.awt.image.WritableRaster; |
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14 import java.io.IOException; |
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15 import java.io.OutputStream; |
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16 import java.io.UnsupportedEncodingException; |
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17 import java.net.URLDecoder; |
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18 import java.util.Arrays; |
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19 import java.util.List; |
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20 import java.util.Map; |
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21 |
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22 import javax.imageio.ImageIO; |
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23 |
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24 import org.dive4elements.artifactdatabase.rest.BaseResource; |
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25 import org.restlet.Client; |
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26 import org.restlet.Context; |
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27 import org.restlet.Request; |
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28 import org.restlet.Response; |
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29 import org.restlet.data.Form; |
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30 import org.restlet.data.MediaType; |
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31 import org.restlet.data.Method; |
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32 import org.restlet.data.Protocol; |
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33 import org.restlet.data.Reference; |
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34 import org.restlet.data.Status; |
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35 import org.restlet.representation.OutputRepresentation; |
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36 import org.restlet.representation.Representation; |
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37 import org.restlet.resource.ResourceException; |
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38 |
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39 /** |
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40 * Proof of context wms proxy. |
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41 * |
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42 * @author Gernot Belger |
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43 */ |
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44 public class VegetationWmsResource extends BaseResource { |
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45 |
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46 public static final String BASE_PATH = "vegetationWms"; |
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47 |
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48 private static final String ATTRIBUTE_VEGETATION_ARTIFACT_UUID = "vegetation-artifact-uuid"; |
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49 |
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50 private static final String ATTRIBUTE_WMS_URL = "wmsUrl"; |
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51 |
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52 private static final ThreadLocal<Client> CLIENT = new ThreadLocal<Client>() { |
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53 @Override |
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54 protected Client initialValue() { |
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55 |
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56 final List<Protocol> protocols = Arrays.asList(Protocol.HTTPS, Protocol.HTTP); |
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57 final Client client = new Client(new Context(), protocols); |
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58 // FIXME |
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59 /* Nachfolgende 2 Zeilen sind nur für die BCE-Entwicklungsumgebung bestimmt */ |
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60 // client.getContext().getParameters().add("proxyHost", "proxy.bce01.de"); |
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61 // client.getContext().getParameters().add("proxyPort", "8080"); |
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62 return client; |
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63 } |
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64 }; |
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65 |
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66 @Override |
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67 protected Representation innerGet() throws ResourceException { |
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68 |
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69 try { |
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70 final Request request = getRequest(); |
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71 |
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72 final Map<String, Object> attributes = request.getAttributes(); |
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73 final String vegArtifactUuid = (String) attributes.get(ATTRIBUTE_VEGETATION_ARTIFACT_UUID); |
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74 final String baseUrl = (String) attributes.get(ATTRIBUTE_WMS_URL); |
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75 |
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76 final Reference originalRef = request.getOriginalRef(); |
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77 final String query = originalRef.getQuery(); |
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78 |
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79 final Form queryAsForm = originalRef.getQueryAsForm(); |
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80 final boolean isGetMap = "GetMap".equalsIgnoreCase(queryAsForm.getFirstValue("REQUEST", true)); |
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81 |
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82 final String decodedBaseUrl = URLDecoder.decode(baseUrl, "UTF-8"); |
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83 |
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84 final Reference proxyReference = new Reference(decodedBaseUrl); |
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85 proxyReference.setQuery(query); |
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86 |
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87 final Client client = CLIENT.get(); |
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88 |
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89 final Request proxyRequest = new Request(Method.GET, proxyReference); |
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90 final Response response = client.handle(proxyRequest); |
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91 |
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92 final Status status = response.getStatus(); |
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93 |
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94 if (!Status.SUCCESS_OK.equals(status)) |
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95 throw new ResourceException(status); |
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96 |
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97 final Representation entity = response.getEntity(); |
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98 |
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99 /* simply redirect everything that is not an png image */ |
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100 if (!isGetMap) |
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101 return entity; |
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102 |
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103 final MediaType mediaType = entity.getMediaType(); |
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104 if (!MediaType.IMAGE_ALL.getMainType().equals(mediaType.getMainType())) |
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105 return entity; |
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106 |
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107 try { |
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108 final BufferedImage image = ImageIO.read(entity.getStream()); |
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109 |
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110 // FIXME: tweak image... |
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111 final WritableRaster raster = image.getRaster(); |
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112 final int width = raster.getWidth(); |
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113 final int height = raster.getHeight(); |
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114 final int numBands = raster.getNumBands(); |
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115 for (int x = 0; x < width; x++) { |
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116 for (int y = 0; y < height; y++) { |
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117 |
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118 // final double sampleDouble = raster.getSampleDouble(x, y, 0); |
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119 |
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120 final int red = raster.getSample(x, y, 0); |
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121 final int green = raster.getSample(x, y, 1); |
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122 final int blue = raster.getSample(x, y, 2); |
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123 final int alpha = raster.getSample(x, y, 3); |
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124 |
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125 raster.setSample(x, y, 0, green); |
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126 raster.setSample(x, y, 1, red); |
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127 raster.setSample(x, y, 2, blue); |
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128 raster.setSample(x, y, 3, alpha); |
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129 } |
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130 } |
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131 |
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132 final Representation newResponse = new OutputRepresentation(mediaType) { |
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133 |
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134 @Override |
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135 public void write(final OutputStream outputStream) throws IOException { |
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136 |
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137 // REMARK: in most cases the media-subtype can be used as image-format name. |
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138 final String subType = mediaType.getSubType(); |
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139 ImageIO.write(image, subType, outputStream); |
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140 |
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141 } |
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142 }; |
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143 |
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144 return newResponse; |
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145 } |
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146 catch (final IOException e) { |
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147 e.printStackTrace(); |
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148 throw new ResourceException(Status.SERVER_ERROR_INTERNAL, e); |
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149 } |
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150 |
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151 } |
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152 catch (final UnsupportedEncodingException e) { |
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153 e.printStackTrace(); |
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154 throw new ResourceException(Status.CLIENT_ERROR_BAD_REQUEST, e); |
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155 } |
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156 } |
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157 } |
