org.argeo.app.servlet.publish/src/org/argeo/app/servlet/publish/GeoToSvgServlet.java

   1 package org.argeo.app.servlet.publish;
   2
   3 import java.io.IOException;
   4 import java.io.InputStream;
   5 import java.net.URLDecoder;
   6 import java.nio.charset.StandardCharsets;
   7 import java.util.Map;
   8
   9 import javax.servlet.ServletException;
  10 import javax.servlet.http.HttpServlet;
  11 import javax.servlet.http.HttpServletRequest;
  12 import javax.servlet.http.HttpServletResponse;
  13
  14 import org.argeo.api.acr.Content;
  15 import org.argeo.api.acr.ContentRepository;
  16 import org.argeo.api.acr.ContentSession;
  17 import org.argeo.app.geo.GeoUtils;
  18 import org.argeo.app.geo.GpxUtils;
  19 import org.argeo.cms.auth.RemoteAuthUtils;
  20 import org.argeo.cms.servlet.ServletHttpRequest;
  21 import org.geotools.data.collection.ListFeatureCollection;
  22 import org.geotools.data.simple.SimpleFeatureCollection;
  23 import org.opengis.feature.simple.SimpleFeature;
  24
  25 /**
  26  * A servlet transforming an geographical data to SVG.
  27  */
  28 public class GeoToSvgServlet extends HttpServlet {
  29         private static final long serialVersionUID = -6346379324580671894L;
  30         private ContentRepository contentRepository;
  31
  32         @Override
  33         protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
  34                 String servletPath = req.getServletPath();
  35
  36                 servletPath = servletPath.substring(1, servletPath.lastIndexOf('.'));
  37                 servletPath = servletPath.substring(servletPath.indexOf('/'), servletPath.length());
  38                 String path = URLDecoder.decode(servletPath, StandardCharsets.UTF_8);
  39                 String ext = servletPath.substring(path.lastIndexOf('.'));
  40
  41                 resp.setContentType("image/svg+xml");
  42
  43                 ContentSession session = RemoteAuthUtils.doAs(() -> contentRepository.get(), new ServletHttpRequest(req));
  44                 Content content = session.get(path);
  45                 if (".gpx".equals(ext)) {
  46                         try (InputStream in = content.open(InputStream.class)) {
  47                                 SimpleFeature field = GpxUtils.parseGpxToPolygon(in);
  48
  49                                 SimpleFeatureCollection features = new ListFeatureCollection(field.getType(), field);
  50                                 GeoUtils.exportToSvg(features, resp.getWriter(), 100, 100);
  51 //                      log.debug("SVG:\n" + writer.toString() + "\n");
  52                         }
  53                 }
  54         }
  55
  56         public void start(Map<String, Object> properties) {
  57         }
  58
  59         public void stop(Map<String, Object> properties) {
  60
  61         }
  62
  63         public void setContentRepository(ContentRepository contentRepository) {
  64                 this.contentRepository = contentRepository;
  65         }
  66
  67 }