1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
package tim.prune.gui.map.tile;
import tim.prune.GpsPrune;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
/**
* Single worker instance processing definitions from the coordinator
*/
public class TileDownloader extends TileWorker
{
public TileDownloader(Coordinator inParent) {
super(inParent);
}
@Override
protected TileBytes processTile(TileDef def)
{
URL tileUrl = def.getUrl();
if (tileUrl == null) {
return null;
}
InputStream in = null;
TileBytes result = null;
try
{
URLConnection conn = tileUrl.openConnection();
conn.setRequestProperty("User-Agent", "GpsPrune v" + GpsPrune.VERSION_NUMBER);
in = conn.getInputStream();
result = new TileBytes();
int bytesRead = 0;
byte[] buffer = new byte[4096];
while (bytesRead >= 0)
{
bytesRead = in.read(buffer, 0, buffer.length);
result.addBytes(buffer, bytesRead);
}
// TODO: if this worked, maybe we just came back online?
}
catch (IOException e)
{
System.err.println("IOE: " + e.getClass().getName() + " - " + e.getMessage());
// TODO: if this didn't work, maybe we are now offline, or maybe we just need to block this URL to avoid retries?
}
finally {
try {
in.close();
} catch (IOException | NullPointerException ignored) {}
}
return result;
}
}
|
