1 | // License: GPL. For details, see LICENSE file.
|
---|
2 | package org.openstreetmap.josm.io.imagery;
|
---|
3 |
|
---|
4 | import java.awt.HeadlessException;
|
---|
5 | import java.io.IOException;
|
---|
6 | import java.io.StringReader;
|
---|
7 | import java.net.MalformedURLException;
|
---|
8 | import java.net.URL;
|
---|
9 | import java.util.ArrayList;
|
---|
10 | import java.util.Collection;
|
---|
11 | import java.util.Collections;
|
---|
12 | import java.util.HashSet;
|
---|
13 | import java.util.List;
|
---|
14 | import java.util.Locale;
|
---|
15 | import java.util.Set;
|
---|
16 | import java.util.regex.Pattern;
|
---|
17 |
|
---|
18 | import javax.imageio.ImageIO;
|
---|
19 | import javax.xml.parsers.DocumentBuilder;
|
---|
20 | import javax.xml.parsers.DocumentBuilderFactory;
|
---|
21 |
|
---|
22 | import org.openstreetmap.josm.Main;
|
---|
23 | import org.openstreetmap.josm.data.Bounds;
|
---|
24 | import org.openstreetmap.josm.data.imagery.ImageryInfo;
|
---|
25 | import org.openstreetmap.josm.data.projection.Projections;
|
---|
26 | import org.openstreetmap.josm.tools.HttpClient;
|
---|
27 | import org.openstreetmap.josm.tools.Predicate;
|
---|
28 | import org.openstreetmap.josm.tools.Utils;
|
---|
29 | import org.w3c.dom.Document;
|
---|
30 | import org.w3c.dom.Element;
|
---|
31 | import org.w3c.dom.Node;
|
---|
32 | import org.w3c.dom.NodeList;
|
---|
33 | import org.xml.sax.EntityResolver;
|
---|
34 | import org.xml.sax.InputSource;
|
---|
35 | import org.xml.sax.SAXException;
|
---|
36 |
|
---|
37 | public class WMSImagery {
|
---|
38 |
|
---|
39 | public static class WMSGetCapabilitiesException extends Exception {
|
---|
40 | private final String incomingData;
|
---|
41 |
|
---|
42 | public WMSGetCapabilitiesException(Throwable cause, String incomingData) {
|
---|
43 | super(cause);
|
---|
44 | this.incomingData = incomingData;
|
---|
45 | }
|
---|
46 |
|
---|
47 | public String getIncomingData() {
|
---|
48 | return incomingData;
|
---|
49 | }
|
---|
50 | }
|
---|
51 |
|
---|
52 | private List<LayerDetails> layers;
|
---|
53 | private URL serviceUrl;
|
---|
54 | private List<String> formats;
|
---|
55 |
|
---|
56 | public List<LayerDetails> getLayers() {
|
---|
57 | return layers;
|
---|
58 | }
|
---|
59 |
|
---|
60 | public URL getServiceUrl() {
|
---|
61 | return serviceUrl;
|
---|
62 | }
|
---|
63 |
|
---|
64 | public List<String> getFormats() {
|
---|
65 | return Collections.unmodifiableList(formats);
|
---|
66 | }
|
---|
67 |
|
---|
68 | public String getPreferredFormats() {
|
---|
69 | return formats.contains("image/jpeg") ? "image/jpeg"
|
---|
70 | : formats.contains("image/png") ? "image/png"
|
---|
71 | : formats.isEmpty() ? null
|
---|
72 | : formats.get(0);
|
---|
73 | }
|
---|
74 |
|
---|
75 | String buildRootUrl() {
|
---|
76 | if (serviceUrl == null) {
|
---|
77 | return null;
|
---|
78 | }
|
---|
79 | StringBuilder a = new StringBuilder(serviceUrl.getProtocol());
|
---|
80 | a.append("://").append(serviceUrl.getHost());
|
---|
81 | if (serviceUrl.getPort() != -1) {
|
---|
82 | a.append(':').append(serviceUrl.getPort());
|
---|
83 | }
|
---|
84 | a.append(serviceUrl.getPath()).append('?');
|
---|
85 | if (serviceUrl.getQuery() != null) {
|
---|
86 | a.append(serviceUrl.getQuery());
|
---|
87 | if (!serviceUrl.getQuery().isEmpty() && !serviceUrl.getQuery().endsWith("&")) {
|
---|
88 | a.append('&');
|
---|
89 | }
|
---|
90 | }
|
---|
91 | return a.toString();
|
---|
92 | }
|
---|
93 |
|
---|
94 | public String buildGetMapUrl(Collection<LayerDetails> selectedLayers) {
|
---|
95 | return buildGetMapUrl(selectedLayers, "image/jpeg");
|
---|
96 | }
|
---|
97 |
|
---|
98 | public String buildGetMapUrl(Collection<LayerDetails> selectedLayers, String format) {
|
---|
99 | return buildRootUrl()
|
---|
100 | + "FORMAT=" + format + (imageFormatHasTransparency(format) ? "&TRANSPARENT=TRUE" : "")
|
---|
101 | + "&VERSION=1.1.1&SERVICE=WMS&REQUEST=GetMap&LAYERS="
|
---|
102 | + Utils.join(",", Utils.transform(selectedLayers, new Utils.Function<LayerDetails, String>() {
|
---|
103 | @Override
|
---|
104 | public String apply(LayerDetails x) {
|
---|
105 | return x.ident;
|
---|
106 | }
|
---|
107 | }))
|
---|
108 | + "&STYLES=&SRS={proj}&WIDTH={width}&HEIGHT={height}&BBOX={bbox}";
|
---|
109 | }
|
---|
110 |
|
---|
111 | public void attemptGetCapabilities(String serviceUrlStr) throws MalformedURLException, IOException, WMSGetCapabilitiesException {
|
---|
112 | URL getCapabilitiesUrl = null;
|
---|
113 | try {
|
---|
114 | if (!Pattern.compile(".*GetCapabilities.*", Pattern.CASE_INSENSITIVE).matcher(serviceUrlStr).matches()) {
|
---|
115 | // If the url doesn't already have GetCapabilities, add it in
|
---|
116 | getCapabilitiesUrl = new URL(serviceUrlStr);
|
---|
117 | final String getCapabilitiesQuery = "VERSION=1.1.1&SERVICE=WMS&REQUEST=GetCapabilities";
|
---|
118 | if (getCapabilitiesUrl.getQuery() == null) {
|
---|
119 | getCapabilitiesUrl = new URL(serviceUrlStr + '?' + getCapabilitiesQuery);
|
---|
120 | } else if (!getCapabilitiesUrl.getQuery().isEmpty() && !getCapabilitiesUrl.getQuery().endsWith("&")) {
|
---|
121 | getCapabilitiesUrl = new URL(serviceUrlStr + '&' + getCapabilitiesQuery);
|
---|
122 | } else {
|
---|
123 | getCapabilitiesUrl = new URL(serviceUrlStr + getCapabilitiesQuery);
|
---|
124 | }
|
---|
125 | } else {
|
---|
126 | // Otherwise assume it's a good URL and let the subsequent error
|
---|
127 | // handling systems deal with problems
|
---|
128 | getCapabilitiesUrl = new URL(serviceUrlStr);
|
---|
129 | }
|
---|
130 | serviceUrl = new URL(serviceUrlStr);
|
---|
131 | } catch (HeadlessException e) {
|
---|
132 | return;
|
---|
133 | }
|
---|
134 |
|
---|
135 | Main.info("GET " + getCapabilitiesUrl);
|
---|
136 | final String incomingData = HttpClient.create(getCapabilitiesUrl).connect().fetchContent();
|
---|
137 | Main.debug("Server response to Capabilities request:");
|
---|
138 | Main.debug(incomingData);
|
---|
139 |
|
---|
140 | try {
|
---|
141 | DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
|
---|
142 | builderFactory.setValidating(false);
|
---|
143 | builderFactory.setNamespaceAware(true);
|
---|
144 | DocumentBuilder builder = null;
|
---|
145 | builder = builderFactory.newDocumentBuilder();
|
---|
146 | builder.setEntityResolver(new EntityResolver() {
|
---|
147 | @Override
|
---|
148 | public InputSource resolveEntity(String publicId, String systemId) throws SAXException, IOException {
|
---|
149 | Main.info("Ignoring DTD " + publicId + ", " + systemId);
|
---|
150 | return new InputSource(new StringReader(""));
|
---|
151 | }
|
---|
152 | });
|
---|
153 | Document document = null;
|
---|
154 | document = builder.parse(new InputSource(new StringReader(incomingData)));
|
---|
155 |
|
---|
156 | // Some WMS service URLs specify a different base URL for their GetMap service
|
---|
157 | Element child = getChild(document.getDocumentElement(), "Capability");
|
---|
158 | child = getChild(child, "Request");
|
---|
159 | child = getChild(child, "GetMap");
|
---|
160 |
|
---|
161 | formats = new ArrayList<>(Utils.filter(Utils.transform(getChildren(child, "Format"),
|
---|
162 | new Utils.Function<Element, String>() {
|
---|
163 | @Override
|
---|
164 | public String apply(Element x) {
|
---|
165 | return x.getTextContent();
|
---|
166 | }
|
---|
167 | }),
|
---|
168 | new Predicate<String>() {
|
---|
169 | @Override
|
---|
170 | public boolean evaluate(String format) {
|
---|
171 | boolean isFormatSupported = isImageFormatSupported(format);
|
---|
172 | if (!isFormatSupported) {
|
---|
173 | Main.info("Skipping unsupported image format {0}", format);
|
---|
174 | }
|
---|
175 | return isFormatSupported;
|
---|
176 | }
|
---|
177 | }
|
---|
178 | ));
|
---|
179 |
|
---|
180 | child = getChild(child, "DCPType");
|
---|
181 | child = getChild(child, "HTTP");
|
---|
182 | child = getChild(child, "Get");
|
---|
183 | child = getChild(child, "OnlineResource");
|
---|
184 | if (child != null) {
|
---|
185 | String baseURL = child.getAttribute("xlink:href");
|
---|
186 | if (baseURL != null && !baseURL.equals(serviceUrlStr)) {
|
---|
187 | Main.info("GetCapabilities specifies a different service URL: " + baseURL);
|
---|
188 | serviceUrl = new URL(baseURL);
|
---|
189 | }
|
---|
190 | }
|
---|
191 |
|
---|
192 | Element capabilityElem = getChild(document.getDocumentElement(), "Capability");
|
---|
193 | List<Element> children = getChildren(capabilityElem, "Layer");
|
---|
194 | layers = parseLayers(children, new HashSet<String>());
|
---|
195 | } catch (Exception e) {
|
---|
196 | throw new WMSGetCapabilitiesException(e, incomingData);
|
---|
197 | }
|
---|
198 | }
|
---|
199 |
|
---|
200 | static boolean isImageFormatSupported(final String format) {
|
---|
201 | return ImageIO.getImageReadersByMIMEType(format).hasNext()
|
---|
202 | // handles image/tiff image/tiff8 image/geotiff image/geotiff8
|
---|
203 | || (format.startsWith("image/tiff") || format.startsWith("image/geotiff")) && ImageIO.getImageReadersBySuffix("tiff").hasNext()
|
---|
204 | || format.startsWith("image/png") && ImageIO.getImageReadersBySuffix("png").hasNext()
|
---|
205 | || format.startsWith("image/svg") && ImageIO.getImageReadersBySuffix("svg").hasNext()
|
---|
206 | || format.startsWith("image/bmp") && ImageIO.getImageReadersBySuffix("bmp").hasNext();
|
---|
207 | }
|
---|
208 |
|
---|
209 | static boolean imageFormatHasTransparency(final String format) {
|
---|
210 | return format != null && (format.startsWith("image/png") || format.startsWith("image/gif")
|
---|
211 | || format.startsWith("image/svg") || format.startsWith("image/tiff"));
|
---|
212 | }
|
---|
213 |
|
---|
214 | public ImageryInfo toImageryInfo(String name, Collection<LayerDetails> selectedLayers) {
|
---|
215 | ImageryInfo i = new ImageryInfo(name, buildGetMapUrl(selectedLayers));
|
---|
216 | if (selectedLayers != null) {
|
---|
217 | Set<String> proj = new HashSet<>();
|
---|
218 | for (WMSImagery.LayerDetails l : selectedLayers) {
|
---|
219 | proj.addAll(l.getProjections());
|
---|
220 | }
|
---|
221 | i.setServerProjections(proj);
|
---|
222 | }
|
---|
223 | return i;
|
---|
224 | }
|
---|
225 |
|
---|
226 | private List<LayerDetails> parseLayers(List<Element> children, Set<String> parentCrs) {
|
---|
227 | List<LayerDetails> details = new ArrayList<>(children.size());
|
---|
228 | for (Element element : children) {
|
---|
229 | details.add(parseLayer(element, parentCrs));
|
---|
230 | }
|
---|
231 | return details;
|
---|
232 | }
|
---|
233 |
|
---|
234 | private LayerDetails parseLayer(Element element, Set<String> parentCrs) {
|
---|
235 | String name = getChildContent(element, "Title", null, null);
|
---|
236 | String ident = getChildContent(element, "Name", null, null);
|
---|
237 |
|
---|
238 | // The set of supported CRS/SRS for this layer
|
---|
239 | Set<String> crsList = new HashSet<>();
|
---|
240 | // ...including this layer's already-parsed parent projections
|
---|
241 | crsList.addAll(parentCrs);
|
---|
242 |
|
---|
243 | // Parse the CRS/SRS pulled out of this layer's XML element
|
---|
244 | // I think CRS and SRS are the same at this point
|
---|
245 | List<Element> crsChildren = getChildren(element, "CRS");
|
---|
246 | crsChildren.addAll(getChildren(element, "SRS"));
|
---|
247 | for (Element child : crsChildren) {
|
---|
248 | String crs = (String) getContent(child);
|
---|
249 | if (!crs.isEmpty()) {
|
---|
250 | String upperCase = crs.trim().toUpperCase(Locale.ENGLISH);
|
---|
251 | crsList.add(upperCase);
|
---|
252 | }
|
---|
253 | }
|
---|
254 |
|
---|
255 | // Check to see if any of the specified projections are supported by JOSM
|
---|
256 | boolean josmSupportsThisLayer = false;
|
---|
257 | for (String crs : crsList) {
|
---|
258 | josmSupportsThisLayer |= isProjSupported(crs);
|
---|
259 | }
|
---|
260 |
|
---|
261 | Bounds bounds = null;
|
---|
262 | Element bboxElem = getChild(element, "EX_GeographicBoundingBox");
|
---|
263 | if (bboxElem != null) {
|
---|
264 | // Attempt to use EX_GeographicBoundingBox for bounding box
|
---|
265 | double left = Double.parseDouble(getChildContent(bboxElem, "westBoundLongitude", null, null));
|
---|
266 | double top = Double.parseDouble(getChildContent(bboxElem, "northBoundLatitude", null, null));
|
---|
267 | double right = Double.parseDouble(getChildContent(bboxElem, "eastBoundLongitude", null, null));
|
---|
268 | double bot = Double.parseDouble(getChildContent(bboxElem, "southBoundLatitude", null, null));
|
---|
269 | bounds = new Bounds(bot, left, top, right);
|
---|
270 | } else {
|
---|
271 | // If that's not available, try LatLonBoundingBox
|
---|
272 | bboxElem = getChild(element, "LatLonBoundingBox");
|
---|
273 | if (bboxElem != null) {
|
---|
274 | double left = Double.parseDouble(bboxElem.getAttribute("minx"));
|
---|
275 | double top = Double.parseDouble(bboxElem.getAttribute("maxy"));
|
---|
276 | double right = Double.parseDouble(bboxElem.getAttribute("maxx"));
|
---|
277 | double bot = Double.parseDouble(bboxElem.getAttribute("miny"));
|
---|
278 | bounds = new Bounds(bot, left, top, right);
|
---|
279 | }
|
---|
280 | }
|
---|
281 |
|
---|
282 | List<Element> layerChildren = getChildren(element, "Layer");
|
---|
283 | List<LayerDetails> childLayers = parseLayers(layerChildren, crsList);
|
---|
284 |
|
---|
285 | return new LayerDetails(name, ident, crsList, josmSupportsThisLayer, bounds, childLayers);
|
---|
286 | }
|
---|
287 |
|
---|
288 | private static boolean isProjSupported(String crs) {
|
---|
289 | return Projections.getProjectionByCode(crs) != null;
|
---|
290 | }
|
---|
291 |
|
---|
292 | private static String getChildContent(Element parent, String name, String missing, String empty) {
|
---|
293 | Element child = getChild(parent, name);
|
---|
294 | if (child == null)
|
---|
295 | return missing;
|
---|
296 | else {
|
---|
297 | String content = (String) getContent(child);
|
---|
298 | return (!content.isEmpty()) ? content : empty;
|
---|
299 | }
|
---|
300 | }
|
---|
301 |
|
---|
302 | private static Object getContent(Element element) {
|
---|
303 | NodeList nl = element.getChildNodes();
|
---|
304 | StringBuilder content = new StringBuilder();
|
---|
305 | for (int i = 0; i < nl.getLength(); i++) {
|
---|
306 | Node node = nl.item(i);
|
---|
307 | switch (node.getNodeType()) {
|
---|
308 | case Node.ELEMENT_NODE:
|
---|
309 | return node;
|
---|
310 | case Node.CDATA_SECTION_NODE:
|
---|
311 | case Node.TEXT_NODE:
|
---|
312 | content.append(node.getNodeValue());
|
---|
313 | break;
|
---|
314 | }
|
---|
315 | }
|
---|
316 | return content.toString().trim();
|
---|
317 | }
|
---|
318 |
|
---|
319 | private static List<Element> getChildren(Element parent, String name) {
|
---|
320 | List<Element> retVal = new ArrayList<>();
|
---|
321 | for (Node child = parent.getFirstChild(); child != null; child = child.getNextSibling()) {
|
---|
322 | if (child instanceof Element && name.equals(child.getNodeName())) {
|
---|
323 | retVal.add((Element) child);
|
---|
324 | }
|
---|
325 | }
|
---|
326 | return retVal;
|
---|
327 | }
|
---|
328 |
|
---|
329 | private static Element getChild(Element parent, String name) {
|
---|
330 | if (parent == null)
|
---|
331 | return null;
|
---|
332 | for (Node child = parent.getFirstChild(); child != null; child = child.getNextSibling()) {
|
---|
333 | if (child instanceof Element && name.equals(child.getNodeName()))
|
---|
334 | return (Element) child;
|
---|
335 | }
|
---|
336 | return null;
|
---|
337 | }
|
---|
338 |
|
---|
339 | public static class LayerDetails {
|
---|
340 |
|
---|
341 | public final String name;
|
---|
342 | public final String ident;
|
---|
343 | public final List<LayerDetails> children;
|
---|
344 | public final Bounds bounds;
|
---|
345 | public final Set<String> crsList;
|
---|
346 | public final boolean supported;
|
---|
347 |
|
---|
348 | public LayerDetails(String name, String ident, Set<String> crsList,
|
---|
349 | boolean supportedLayer, Bounds bounds,
|
---|
350 | List<LayerDetails> childLayers) {
|
---|
351 | this.name = name;
|
---|
352 | this.ident = ident;
|
---|
353 | this.supported = supportedLayer;
|
---|
354 | this.children = childLayers;
|
---|
355 | this.bounds = bounds;
|
---|
356 | this.crsList = crsList;
|
---|
357 | }
|
---|
358 |
|
---|
359 | public boolean isSupported() {
|
---|
360 | return this.supported;
|
---|
361 | }
|
---|
362 |
|
---|
363 | public Set<String> getProjections() {
|
---|
364 | return crsList;
|
---|
365 | }
|
---|
366 |
|
---|
367 | @Override
|
---|
368 | public String toString() {
|
---|
369 | if (this.name == null || this.name.isEmpty())
|
---|
370 | return this.ident;
|
---|
371 | else
|
---|
372 | return this.name;
|
---|
373 | }
|
---|
374 |
|
---|
375 | }
|
---|
376 | }
|
---|