yacy_search_server/htroot/osm.java
Michael Peter Christen 5516819354 preventing the use of no-cache and expires in case that images are
generated dynamically which will stay static in the future. This applies
mainly to the search result favicon in front of search hits. These icons
will now be generated once, but then caches in the browser. There is
also a YaCy-internal cache for these icons which had prevented the
re-generation of the icons in YaCy, but this cache is now superfluous
since the browser should not call the servlet ViewImage again.
2014-12-19 17:41:38 +01:00

64 lines
2.7 KiB
Java

/**
* osm
* Copyright 2008 by Michael Peter Christen
* First released 13.02.2011 at http://yacy.net
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program in the file lgpl21.txt
* If not, see <http://www.gnu.org/licenses/>.
*/
import net.yacy.cora.protocol.RequestHeader;
import net.yacy.peers.graphics.EncodedImage;
import net.yacy.peers.graphics.OSMTile;
import net.yacy.server.serverObjects;
import net.yacy.server.serverSwitch;
import net.yacy.visualization.PrintTool;
import net.yacy.visualization.RasterPlotter;
import net.yacy.visualization.RasterPlotter.DrawMode;
public class osm {
public static EncodedImage respond(@SuppressWarnings("unused") final RequestHeader header, final serverObjects post, @SuppressWarnings("unused") final serverSwitch env) {
int zoom = 10;
double lat = 50.11670d;
double lon = 8.68333d;
int width = 3;
int height = 3;
if (post != null) {
zoom = post.getInt("zoom", zoom);
lat = post.getDouble("lat", lat);
lon = post.getDouble("lon", lon);
width = post.getInt("width", width);
height = post.getInt("height", height);
}
final OSMTile.tileCoordinates coord = new OSMTile.tileCoordinates(lat, lon, zoom);
RasterPlotter map = OSMTile.getCombinedTiles(coord, width, height);
map.setDrawMode(DrawMode.MODE_SUB);
map.setColor(0xffffff);
/*
* copyright notice on OSM Tiles
* According to http://www.openstreetmap.org/copyright/ the (C) of the map tiles is (CC BY-SA)
* while the OpenStreetMap raw data is licensed with (ODbL) http://opendatacommons.org/licenses/odbl/
* Map tiles shall be underlined with the statement "(C) OpenStreetMap contributors". In our 5-dot character
* set the lowercase letters do not look good, so we use uppercase only.
* The (C) symbol is not available in our font, so we use the letters (C) instead.
*/
PrintTool.print(map, map.getWidth() - 6, map.getHeight() - 6, 0, "(C) OPENSTREETMAP CONTRIBUTORS", 1);
return new EncodedImage(map, header.get("EXT", null), true);
}
}