root / trunk / libraries / libArcIMS / src / org / gvsig / remoteClient / arcims / ArcImsProtImageHandler.java @ 8109
History | View | Annotate | Download (24.2 KB)
1 |
/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
|
---|---|
2 |
*
|
3 |
* Copyright (C) 2006 Prodevelop and Generalitat Valenciana.
|
4 |
*
|
5 |
* This program is free software; you can redistribute it and/or
|
6 |
* modify it under the terms of the GNU General Public License
|
7 |
* as published by the Free Software Foundation; either version 2
|
8 |
* of the License, or (at your option) any later version.
|
9 |
*
|
10 |
* This program is distributed in the hope that it will be useful,
|
11 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
12 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
13 |
* GNU General Public License for more details.
|
14 |
*
|
15 |
* You should have received a copy of the GNU General Public License
|
16 |
* along with this program; if not, write to the Free Software
|
17 |
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
|
18 |
*
|
19 |
* For more information, contact:
|
20 |
*
|
21 |
* Generalitat Valenciana
|
22 |
* Conselleria d'Infraestructures i Transport
|
23 |
* Av. Blasco Ib??ez, 50
|
24 |
* 46010 VALENCIA
|
25 |
* SPAIN
|
26 |
*
|
27 |
* +34 963862235
|
28 |
* gvsig@gva.es
|
29 |
* www.gvsig.gva.es
|
30 |
*
|
31 |
* or
|
32 |
*
|
33 |
* Prodevelop Integraci?n de Tecnolog?as SL
|
34 |
* Conde Salvatierra de ?lava , 34-10
|
35 |
* 46004 Valencia
|
36 |
* Spain
|
37 |
*
|
38 |
* +34 963 510 612
|
39 |
* +34 963 510 968
|
40 |
* gis@prodevelop.es
|
41 |
* http://www.prodevelop.es
|
42 |
*/
|
43 |
|
44 |
package org.gvsig.remoteClient.arcims; |
45 |
|
46 |
import org.apache.log4j.Logger; |
47 |
|
48 |
import org.cresques.cts.IProjection; |
49 |
|
50 |
import org.gvsig.remoteClient.arcims.exceptions.ArcImsException; |
51 |
import org.gvsig.remoteClient.arcims.utils.ArcImsDownloadUtils; |
52 |
import org.gvsig.remoteClient.arcims.utils.GetImageTags; |
53 |
import org.gvsig.remoteClient.arcims.utils.ServiceInfoTags; |
54 |
import org.gvsig.remoteClient.arcims.utils.ServiceInformation; |
55 |
import org.gvsig.remoteClient.arcims.utils.ServiceInformationLayer; |
56 |
import org.gvsig.remoteClient.exceptions.ServerErrorException; |
57 |
import org.gvsig.remoteClient.utils.BoundaryBox; |
58 |
|
59 |
import org.kxml2.io.KXmlParser; |
60 |
|
61 |
import org.xmlpull.v1.XmlPullParserException; |
62 |
|
63 |
import java.awt.Rectangle; |
64 |
import java.awt.geom.Area; |
65 |
import java.awt.geom.Rectangle2D; |
66 |
|
67 |
import java.io.BufferedReader; |
68 |
import java.io.File; |
69 |
import java.io.FileNotFoundException; |
70 |
import java.io.FileReader; |
71 |
import java.io.IOException; |
72 |
import java.io.Reader; |
73 |
|
74 |
import java.net.ConnectException; |
75 |
import java.net.MalformedURLException; |
76 |
import java.net.URL; |
77 |
|
78 |
import java.util.Vector; |
79 |
|
80 |
|
81 |
/**
|
82 |
* <p>
|
83 |
* Describes the handler to communicate to a ArcIMS ImageServer
|
84 |
* </p>
|
85 |
*/
|
86 |
public class ArcImsProtImageHandler extends ArcImsProtocolHandler { |
87 |
private static Logger logger = Logger.getLogger(ArcImsProtImageHandler.class.getName()); |
88 |
|
89 |
/**
|
90 |
* Method to obtain the correct extent of the Service in a specific SRS
|
91 |
* @param srsFlyr The SRS of the View
|
92 |
* @param status
|
93 |
* @return Rectangle2D The boundary box of the Service
|
94 |
* @throws ArcImsException
|
95 |
*/
|
96 |
public Rectangle2D getServiceExtent(IProjection srsFlyr, ArcImsStatus status) |
97 |
throws ArcImsException {
|
98 |
Rectangle2D rect = new Rectangle(); |
99 |
|
100 |
try {
|
101 |
//System.err.println("Requesting the Extent of the Service");
|
102 |
URL url = new URL(this.buildCapabilitiesRequest(status)); |
103 |
|
104 |
/**
|
105 |
* The seriveInfo
|
106 |
*/
|
107 |
ServiceInformation si = status.getServiceInfo(); |
108 |
|
109 |
/**
|
110 |
* Gets de Decimal Separator and SRS from the status.ServiceInfo
|
111 |
*/
|
112 |
char ds = si.getSeparators().getDs();
|
113 |
String srsSI = si.getFeaturecoordsys();
|
114 |
|
115 |
/**
|
116 |
* The EPSG code that image requested will have,
|
117 |
* the ArcIMS server will reproject data into this
|
118 |
* code, see <a href="http://www.epsg.org">EPSG</a>
|
119 |
*/
|
120 |
String srsView = srsFlyr.getAbrev();
|
121 |
|
122 |
/**
|
123 |
* We suppose that status.getSrs() allways will give a
|
124 |
* string started by this string
|
125 |
*/
|
126 |
String ini_srs = ServiceInfoTags.vINI_SRS;
|
127 |
|
128 |
/**
|
129 |
* Assign the srs from the status
|
130 |
* @see org.gvsig.remoteClient.RemoteClientStatus#getSrs()
|
131 |
*/
|
132 |
if (srsView.startsWith(ini_srs)) {
|
133 |
srsView = srsView.substring(ini_srs.length()).trim(); |
134 |
} |
135 |
|
136 |
/**
|
137 |
* If both SRS are the same or status we pass empty strings
|
138 |
*/
|
139 |
if (srsView.equalsIgnoreCase(srsSI)) {
|
140 |
srsView = "";
|
141 |
srsSI = "";
|
142 |
} |
143 |
|
144 |
/**
|
145 |
* Build the custom request for this extent
|
146 |
*/
|
147 |
String request = ArcXMLImage.getCustomExtentRequest(srsSI,
|
148 |
//ServiceInfo SRS
|
149 |
null, //envelope |
150 |
srsView, //SRS of the view
|
151 |
ds, //Decimal separator
|
152 |
null, //Image size |
153 |
"", si.getLayer(0).getId() //A valid Layer Id |
154 |
); |
155 |
|
156 |
if (status.verbose) {
|
157 |
System.err.println(request);
|
158 |
} |
159 |
|
160 |
logger.info("Requesting Service Extent XML");
|
161 |
|
162 |
File response = ArcImsDownloadUtils.doRequestPost(url, request,
|
163 |
"getServiceExtent.xml");
|
164 |
rect = parseEnvelopeTag(new FileReader(response), ds); |
165 |
} catch (MalformedURLException e) { |
166 |
logger.error(e.getMessage(), e); |
167 |
throw new ArcImsException("arcims_server_error"); |
168 |
} catch (FileNotFoundException e) { |
169 |
logger.error(e.getMessage(), e); |
170 |
throw new ArcImsException("arcims_server_error"); |
171 |
} |
172 |
|
173 |
return rect;
|
174 |
} |
175 |
|
176 |
/**
|
177 |
* <p>It will send a GetFeatureInfo request to the ArcIms
|
178 |
* Parsing the response and redirecting the info to the ArcIms client</p>
|
179 |
* @throws ArcImsException
|
180 |
*/
|
181 |
public String getElementInfo(ArcImsStatus status, int x, int y, |
182 |
int featureCount) throws ArcImsException { |
183 |
double iViewX;
|
184 |
double iViewY;
|
185 |
double iServiceX;
|
186 |
double iServiceY;
|
187 |
double xReal;
|
188 |
double yReal;
|
189 |
|
190 |
// double dist;
|
191 |
int ratio;
|
192 |
double currentScale;
|
193 |
|
194 |
/**
|
195 |
* ServiceInformation of the current Service
|
196 |
*/
|
197 |
ServiceInformation si = status.getServiceInfo(); |
198 |
char ds = si.getSeparators().getDs();
|
199 |
|
200 |
/**
|
201 |
* Determine the SRS to do all the requests, if the ServiceInformation
|
202 |
* doesn't provide a valid SRS, then we use the status srs
|
203 |
*/
|
204 |
String srs = status.getSrs().substring(ServiceInfoTags.vINI_SRS.length())
|
205 |
.trim(); |
206 |
|
207 |
/**
|
208 |
* The geographic extent of the current window
|
209 |
*/
|
210 |
Rectangle2D geoServiceExtent = new Rectangle(); |
211 |
Rectangle2D geoViewExtent = status.getExtent();
|
212 |
|
213 |
/**
|
214 |
* If the SRS's are different we need a reprojection, using a properly
|
215 |
* formed ArcIms GETIMAGE request
|
216 |
*/
|
217 |
if (!si.getFeaturecoordsys().equalsIgnoreCase(srs)) {
|
218 |
try {
|
219 |
logger.info("Requesting the Extent of the Image");
|
220 |
|
221 |
URL url = new URL(this.buildCapabilitiesRequest(status)); |
222 |
String request = ArcXMLImage.getCustomExtentRequest(srs,
|
223 |
status.getExtent(), si.getFeaturecoordsys(), ds, null,
|
224 |
"", si.getLayer(0).getId()); |
225 |
|
226 |
if (status.verbose) {
|
227 |
System.err.println(request);
|
228 |
} |
229 |
|
230 |
File response = ArcImsDownloadUtils.doRequestPost(url, request,
|
231 |
"getInfoImageExtent.xml");
|
232 |
geoServiceExtent = parseEnvelopeTag(new FileReader(response), ds); |
233 |
} catch (MalformedURLException e) { |
234 |
logger.error(e.getMessage(), e); |
235 |
throw new ArcImsException("arcims_server_error"); |
236 |
} catch (FileNotFoundException e) { |
237 |
logger.error(e.getMessage(), e); |
238 |
throw new ArcImsException("arcims_server_error"); |
239 |
} |
240 |
} else {
|
241 |
geoServiceExtent = status.getExtent(); |
242 |
} |
243 |
|
244 |
/**
|
245 |
* URL for the requests of info
|
246 |
*/
|
247 |
URL requestF;
|
248 |
URL requestI;
|
249 |
URL request;
|
250 |
|
251 |
/**
|
252 |
* StringBuffer to store the POST info to pass to the server
|
253 |
*/
|
254 |
StringBuffer sb = new StringBuffer(); |
255 |
|
256 |
/**
|
257 |
* Vector of Layers IDs to request
|
258 |
*/
|
259 |
Vector idLayers = status.getLayerIds();
|
260 |
|
261 |
/**
|
262 |
* String with the ArcXML request (GET_FEATURES)
|
263 |
*/
|
264 |
String sArcXML = new String(); |
265 |
|
266 |
/**
|
267 |
* First at all, we build the request for this service
|
268 |
*/
|
269 |
try {
|
270 |
requestF = new URL(buildGetFeatureInfoRequest(status, |
271 |
ServiceInfoTags.vLAYERTYPE_F)); |
272 |
requestI = new URL(buildGetFeatureInfoRequest(status, |
273 |
ServiceInfoTags.vLAYERTYPE_I)); |
274 |
} catch (Exception e) { |
275 |
e.printStackTrace(); |
276 |
|
277 |
return ""; |
278 |
} |
279 |
|
280 |
sb.append("<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>");
|
281 |
sb.append("<FeatureInfoResponse>");
|
282 |
|
283 |
/**
|
284 |
* We need to obtain the real (geographic) x,y not the pixels of the
|
285 |
* image, a BoundaryBox of the area we will query, the envelope and
|
286 |
* scale of the current view
|
287 |
*
|
288 |
*/
|
289 |
ratio = 3;
|
290 |
iViewX = geoViewExtent.getWidth() / status.getWidth(); |
291 |
iViewY = geoViewExtent.getHeight() / status.getHeight(); |
292 |
iServiceX = geoServiceExtent.getWidth() / status.getWidth(); |
293 |
iServiceY = geoServiceExtent.getHeight() / status.getHeight(); |
294 |
xReal = geoViewExtent.getMinX() + (x * iViewX); |
295 |
yReal = geoViewExtent.getMaxY() - (y * iViewY); |
296 |
|
297 |
if (serviceInfo.getScreen_dpi() == -1) { |
298 |
serviceInfo.setScreen_dpi(96);
|
299 |
} |
300 |
|
301 |
// currentScale = serviceInfo.screen_dpi/INCHES*((iX+iY)/2);
|
302 |
currentScale = 1.0 * ((iServiceX + iServiceY) / 2.0); |
303 |
|
304 |
/**
|
305 |
* Now we are ready to run over the layers to request the info for every
|
306 |
* one
|
307 |
*/
|
308 |
Vector ids = status.getLayerIds();
|
309 |
int n = ids.size();
|
310 |
String fields;
|
311 |
|
312 |
ServiceInformationLayer sil; |
313 |
ServiceInformationLayer silTemp; |
314 |
|
315 |
/*
|
316 |
* If ServiceInfo is Assumed we don't pass a valid SRS to
|
317 |
* avoid projection problems.
|
318 |
*/
|
319 |
if (si.isSrsAssumed()) {
|
320 |
srs = "";
|
321 |
} |
322 |
|
323 |
logger.info("Searching candidate layers");
|
324 |
|
325 |
for (int i = 0; i < n; i++) { |
326 |
/**
|
327 |
* Before we do any request to the server, we will ensure that the
|
328 |
* layer is viewed in the current envelope and scale
|
329 |
*/
|
330 |
|
331 |
/**
|
332 |
* Retrieve the proper ServiceInformationLayer
|
333 |
*/
|
334 |
sil = silTemp = (ServiceInformationLayer) si.getLayers().get(0);
|
335 |
|
336 |
for (int j = 0; j < si.getLayers().size(); j++) { |
337 |
silTemp = (ServiceInformationLayer) si.getLayers().get(j); |
338 |
|
339 |
if (silTemp.getId().equals(ids.get(i))) {
|
340 |
sil = silTemp; |
341 |
|
342 |
break;
|
343 |
} |
344 |
} |
345 |
|
346 |
/**
|
347 |
* Querying about the scale
|
348 |
*/
|
349 |
boolean inScale = false; |
350 |
|
351 |
if (sil.getMinscale() == -1) { |
352 |
if (sil.getMaxscale() == -1) { |
353 |
inScale = true;
|
354 |
} else {
|
355 |
inScale = (currentScale < sil.getMaxscale()); |
356 |
} |
357 |
} else {
|
358 |
if (sil.getMaxscale() == -1) { |
359 |
inScale = (currentScale > sil.getMinscale()); |
360 |
} else {
|
361 |
inScale = (currentScale > sil.getMinscale()) && |
362 |
(currentScale < sil.getMaxscale()); |
363 |
} |
364 |
} |
365 |
|
366 |
if (inScale) {
|
367 |
/**
|
368 |
* Querying about the envelope, we have to ask if geoExtent has
|
369 |
* the Envelope of the layer inside it.
|
370 |
*/
|
371 |
boolean inEnvelope = false; |
372 |
BoundaryBox mEnv = sil.getEnvelope(); |
373 |
|
374 |
Area mVentana = new Area((java.awt.Shape) geoServiceExtent); |
375 |
Rectangle2D rectCapa = new Rectangle2D.Double(mEnv.getXmin(), |
376 |
mEnv.getYmin(), mEnv.getXmax() - mEnv.getXmin(), |
377 |
mEnv.getYmax() - mEnv.getYmin()); |
378 |
|
379 |
inEnvelope = mVentana.intersects(rectCapa); |
380 |
|
381 |
/**
|
382 |
* If two conditions are true, we do the request
|
383 |
*/
|
384 |
|
385 |
// if (inScale && inEnvelope){
|
386 |
if (inEnvelope) {
|
387 |
// System.out.println("Procesando la capa "+ sil.name);
|
388 |
fields = "";
|
389 |
|
390 |
/**
|
391 |
* Get the Info request for a featureclass or raster layer
|
392 |
*/
|
393 |
double[] coords = { xReal, yReal }; |
394 |
double[] dists = { ratio * iServiceX, ratio * iServiceY }; |
395 |
sArcXML = ArcXMLImage.getInfoRequest(sil.getType(), |
396 |
idLayers.get(i).toString(), coords, dists, srs, |
397 |
si.getSeparators().getDs()); |
398 |
|
399 |
if (status.verbose) {
|
400 |
System.err.println(sArcXML);
|
401 |
} |
402 |
|
403 |
/**
|
404 |
* File with a layer info response
|
405 |
*/
|
406 |
if (sil.getType().equals(ServiceInfoTags.vLAYERTYPE_F)) {
|
407 |
request = requestF; |
408 |
} else {
|
409 |
request = requestI; |
410 |
} |
411 |
|
412 |
logger.info("Requesting layer \"" + sil.getName() +
|
413 |
"\" information");
|
414 |
|
415 |
File response = ArcImsDownloadUtils.doRequestPost(request,
|
416 |
sArcXML, "getElementInfo.xml");
|
417 |
|
418 |
/**
|
419 |
* Now we can parse the file to get the FIELDS element
|
420 |
*/
|
421 |
fields = parseFieldsInfoResponse(response); |
422 |
|
423 |
if (!fields.equals("")) { |
424 |
// System.out.println("Se han encontrado resultados,
|
425 |
// procesando atributos");
|
426 |
sb.append(ArcXML.getLayerHeaderInfoResponse( |
427 |
ids.get(i).toString(), status.getServiceInfo())); |
428 |
|
429 |
/**
|
430 |
* FIELDS element
|
431 |
*/
|
432 |
sb.append(fields.replaceAll("#", "_")); |
433 |
|
434 |
// sb.append("\t\t"+"<FIELDS #IY_PRE=\"1000\"
|
435 |
// #SHAPE#=\"[Geometry]\" #ID#=\"11\" />\r\n");
|
436 |
sb.append(ArcXML.getLayerFooterInfoResponse()); |
437 |
} |
438 |
|
439 |
// else
|
440 |
// System.out.println("No se han encontrado entidades");
|
441 |
} // Fin del if de ventana
|
442 |
else {
|
443 |
logger.info("Layer \"" + sil.getName() +
|
444 |
"\" is not shown at this envelope");
|
445 |
} |
446 |
} |
447 |
// Fin del if de escala
|
448 |
else {
|
449 |
logger.info("Layer \"" + sil.getName() +
|
450 |
"\" is not shown at this scale");
|
451 |
} |
452 |
} |
453 |
|
454 |
// Fin del for
|
455 |
sb.append("</FeatureInfoResponse>");
|
456 |
|
457 |
// System.out.println(sb.toString());
|
458 |
return sb.toString();
|
459 |
} |
460 |
|
461 |
/**
|
462 |
* Parse the xml data retrieved from the ArcIms, it will parse the ArcIms
|
463 |
* Features
|
464 |
* @see #getElementInfo(ArcImsStatus, int, int, int)
|
465 |
* @param f
|
466 |
* The XML file to parse to obtain the FIELDS element
|
467 |
* @return XML with FIELDS or BAND tags as a response to a getElementInfo
|
468 |
*/
|
469 |
private String parseFieldsInfoResponse(File f) { |
470 |
BufferedReader fi;
|
471 |
String buf;
|
472 |
StringBuffer fields = new StringBuffer(); |
473 |
String token = null; |
474 |
int l = 0; |
475 |
|
476 |
try {
|
477 |
fi = new BufferedReader(new FileReader(f)); |
478 |
|
479 |
while ((buf = fi.readLine()) != null) { |
480 |
// System.out.println(buf);
|
481 |
l++; |
482 |
|
483 |
//System.err.println(l);
|
484 |
if ((buf.length() > 2) && |
485 |
(buf.substring(0, 1).compareTo("<") == 0)) { |
486 |
token = buf.substring(1); //,l.indexOf(GT)); |
487 |
|
488 |
if (token.startsWith("FIELDS")) { |
489 |
fields.append(buf + "");
|
490 |
} |
491 |
|
492 |
if (token.startsWith("BAND ")) { |
493 |
fields.append(buf + "");
|
494 |
} |
495 |
} |
496 |
} |
497 |
|
498 |
fi.close(); |
499 |
System.out.println("Request parsed. (" + l + " lines)"); |
500 |
} catch (FileNotFoundException e) { |
501 |
e.printStackTrace(); |
502 |
} catch (IOException ie) { |
503 |
logger.error("ERROR. (" + l + "lines reeded)"); |
504 |
ie.printStackTrace(); |
505 |
} |
506 |
|
507 |
return fields.toString();
|
508 |
} |
509 |
|
510 |
/**
|
511 |
* <p>Builds a GetMap request that is sent to the ArcIms
|
512 |
* the response (image) will be redirect to the
|
513 |
* ArcIms client</p>
|
514 |
* @param status An @see ArcImsStatus object
|
515 |
* @return File The image requested (a map)
|
516 |
* @throws ArcImsException
|
517 |
* @throws ServerErrorException
|
518 |
*/
|
519 |
public File getMap(ArcImsStatus status) |
520 |
throws ArcImsException, ServerErrorException {
|
521 |
File img = null; |
522 |
String currentImageUrl = ""; |
523 |
|
524 |
try {
|
525 |
URL url = new URL(buildCapabilitiesRequest(status)); |
526 |
|
527 |
String request = ArcXMLImage.getMapRequest(status);
|
528 |
|
529 |
if (status.verbose) {
|
530 |
System.err.println(request);
|
531 |
} |
532 |
|
533 |
logger.info("Requesting ArcIMS GetImage XML");
|
534 |
|
535 |
File response = ArcImsDownloadUtils.doRequestPost(url, request,
|
536 |
"getImage.xml");
|
537 |
|
538 |
try {
|
539 |
currentImageUrl = parseGetImageRequest(new FileReader(response)); |
540 |
|
541 |
//Control if not /output/blahblah has been passed
|
542 |
if (!currentImageUrl.startsWith("http://")) { |
543 |
String servlet = status.getServer();
|
544 |
int ind1 = servlet.indexOf("//"); |
545 |
int ind = servlet.indexOf("/", ind1 + 2); |
546 |
currentImageUrl = servlet.substring(0, ind) +
|
547 |
currentImageUrl; |
548 |
} |
549 |
} catch (FileNotFoundException e) { |
550 |
logger.error(e.getMessage(), e); |
551 |
throw new ArcImsException("Fichero remoto no encontrado"); |
552 |
} |
553 |
|
554 |
URL virtualURL = ArcImsDownloadUtils.getVirtualUrlFromStatus(status);
|
555 |
logger.info("Downloading ArcIMS image");
|
556 |
|
557 |
String[] urlSplitted = currentImageUrl.split("\\."); |
558 |
String extension = urlSplitted[urlSplitted.length - 1]; |
559 |
img = ArcImsDownloadUtils.downloadFile(new URL(currentImageUrl), |
560 |
virtualURL, "getImage." + extension);
|
561 |
|
562 |
// img =com.iver.andami.Utilities.downloadFile(new URL(currentImageUrl),"getImage");
|
563 |
if (img.length() == 0) { |
564 |
return null; |
565 |
} |
566 |
|
567 |
// response.delete();
|
568 |
} catch (MalformedURLException e) { |
569 |
logger.error(e.getMessage(), e); |
570 |
throw new ArcImsException("arcims_server_timeout"); |
571 |
} catch (ConnectException ce) { |
572 |
logger.error("Timed out error", ce);
|
573 |
throw new ArcImsException("arcims_server_timeout"); |
574 |
} catch (FileNotFoundException fe) { |
575 |
logger.error("FileNotFound Error", fe);
|
576 |
throw new ArcImsException("arcims_server_error"); |
577 |
} catch (IOException e) { |
578 |
logger.error("IO Error", e);
|
579 |
throw new ArcImsException("arcims_server_error"); |
580 |
} |
581 |
|
582 |
return img;
|
583 |
} |
584 |
|
585 |
/**
|
586 |
* Method that parses a GET_IMAGE request, sets the
|
587 |
* url to download the rendered image.
|
588 |
* @param fr
|
589 |
* @return @see org.gvsig.remoteClient.arcims.ArcImsProtImageHandler#getMap(ArcImsStatus)
|
590 |
* @throws ArcImsException
|
591 |
* @throws ServerErrorException
|
592 |
*/
|
593 |
private String parseGetImageRequest(Reader fr) |
594 |
throws ArcImsException, ServerErrorException {
|
595 |
String imageUrl = ""; |
596 |
int tag;
|
597 |
KXmlParser kxmlParser = new KXmlParser();
|
598 |
String value = null; |
599 |
|
600 |
try {
|
601 |
kxmlParser.setInput(fr); |
602 |
kxmlParser.nextTag(); |
603 |
|
604 |
if (kxmlParser.getEventType() != KXmlParser.END_DOCUMENT) {
|
605 |
kxmlParser.require(KXmlParser.START_TAG, null,
|
606 |
ServiceInfoTags.tARCXML); |
607 |
tag = kxmlParser.nextTag(); |
608 |
|
609 |
while (tag != KXmlParser.END_DOCUMENT) {
|
610 |
switch (tag) {
|
611 |
case KXmlParser.START_TAG:
|
612 |
|
613 |
if (kxmlParser.getName().compareTo(GetImageTags.OUTPUT) == 0) { |
614 |
value = kxmlParser.getAttributeValue("",
|
615 |
GetImageTags.URL); |
616 |
|
617 |
if (value != null) { |
618 |
imageUrl = value; |
619 |
} |
620 |
} else if (kxmlParser.getName() |
621 |
.compareTo(ServiceInfoTags.tERROR) == 0) {
|
622 |
throw new ServerErrorException( |
623 |
"Error parsing GET_IMAGE:\r\n" +
|
624 |
kxmlParser.nextText()); |
625 |
} |
626 |
|
627 |
break;
|
628 |
|
629 |
case KXmlParser.END_TAG:
|
630 |
break;
|
631 |
|
632 |
case KXmlParser.TEXT:
|
633 |
break;
|
634 |
} |
635 |
|
636 |
tag = kxmlParser.next(); |
637 |
} |
638 |
|
639 |
kxmlParser.require(KXmlParser.END_DOCUMENT, null, null); |
640 |
} |
641 |
} catch (XmlPullParserException parser_ex) {
|
642 |
logger.error(parser_ex.getMessage(), parser_ex); |
643 |
throw new ArcImsException("arcims_server_error"); |
644 |
} catch (IOException ioe) { |
645 |
logger.error(ioe.getMessage(), ioe); |
646 |
throw new ArcImsException("arcims_server_error"); |
647 |
} |
648 |
|
649 |
return imageUrl;
|
650 |
} |
651 |
|
652 |
/**
|
653 |
* Simple method to test if an ArcIMS server responses with an image
|
654 |
* of an specified format
|
655 |
* @param status
|
656 |
* @return
|
657 |
* @throws ArcImsException
|
658 |
*/
|
659 |
public boolean testFormat(ArcImsStatus status, String format) |
660 |
throws ArcImsException {
|
661 |
boolean resp = true; |
662 |
URL url;
|
663 |
|
664 |
try {
|
665 |
ServiceInformation si = status.getServiceInfo(); |
666 |
url = new URL(this.buildCapabilitiesRequest(status)); |
667 |
|
668 |
/**
|
669 |
* Build the custom request for this extent
|
670 |
*/
|
671 |
String request = ArcXMLImage.getCustomExtentRequest("", // ServiceInfo |
672 |
// SRS
|
673 |
null, // envelope |
674 |
"", // SRS of the view |
675 |
si.getSeparators().getDs(), // Decimal separator
|
676 |
null, // Image size |
677 |
format, si.getLayer(0).getId() // A valid Layer Id |
678 |
); |
679 |
|
680 |
if (status.verbose) {
|
681 |
System.err.println(request);
|
682 |
} |
683 |
|
684 |
logger.info("Querying for a specific format");
|
685 |
|
686 |
// BufferedReader lector = ArcImsDownloadUtils.getRemoteReader(url,request);
|
687 |
File f = ArcImsDownloadUtils.doRequestPost(url, request,
|
688 |
"testFormat.xml");
|
689 |
BufferedReader lector = new BufferedReader(new FileReader(f)); |
690 |
|
691 |
/**
|
692 |
* Loop over the reader until it ends or an ERROR is found
|
693 |
*/
|
694 |
String lin = lector.readLine();
|
695 |
|
696 |
//The regular expression to match
|
697 |
String regex = ".*<" + ServiceInfoTags.tERROR + ".*</" + |
698 |
ServiceInfoTags.tERROR + ">.*";
|
699 |
|
700 |
do {
|
701 |
if (lin.matches(regex)) {
|
702 |
return false; |
703 |
} |
704 |
|
705 |
lin = lector.readLine(); |
706 |
} while (lin != null); |
707 |
} catch (MalformedURLException e) { |
708 |
logger.error(e.getMessage(), e); |
709 |
throw new ArcImsException("arcims_server_eror"); |
710 |
} catch (IOException e) { |
711 |
logger.error(e.getMessage(), e); |
712 |
throw new ArcImsException("arcims_server_eror"); |
713 |
} |
714 |
|
715 |
return resp;
|
716 |
} |
717 |
} |