X-Git-Url: http://gitweb.fperrin.net/?a=blobdiff_plain;f=src%2Ftim%2Fprune%2Ffunction%2Fsrtm%2FSrtmViewfinderSource.java;fp=src%2Ftim%2Fprune%2Ffunction%2Fsrtm%2FSrtmViewfinderSource.java;h=9a4066aa73e24d86b3d7690be5dcf90b6cc985fc;hb=2c77855cfb5ff50825996091360098634d1d75ed;hp=0000000000000000000000000000000000000000;hpb=9c79031b2f544a30fdb4377f365d7d0a348eb008;p=GpsPrune.git

diff --git a/src/tim/prune/function/srtm/SrtmViewfinderSource.java b/src/tim/prune/function/srtm/SrtmViewfinderSource.java
new file mode 100644
index 0000000..9a4066a
--- /dev/null
+++ b/src/tim/prune/function/srtm/SrtmViewfinderSource.java
@@ -0,0 +1,172 @@
+package tim.prune.function.srtm;
+
+import java.io.File;
+import java.io.FileReader;
+import java.io.FileOutputStream;
+import java.io.InputStream;
+import java.io.IOException;
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.HttpURLConnection;
+import java.util.HashMap;
+
+import tim.prune.GpsPrune;
+import tim.prune.I18nManager;
+
+public class SrtmViewfinderSource extends SrtmSource {
+	/** URL prefix for all tiles */
+	private static final String URL_PREFIX = "http://viewfinderpanoramas.org/";
+	private HashMap<SrtmTile, String> _tile_lookup = null;
+
+	public SrtmViewfinderSource()
+	{
+	}
+
+	public String getNameKey()
+	{
+		return "function.downloadsrtm." + getName();
+	}
+
+	public String getName()
+	{
+		return "SRTM_Viewfinder";
+	}
+
+	protected String getSourceExtension()
+	{
+		return ".zip";
+	}
+
+	/**
+	 * Read the dat file and get the contents
+	 * @return byte array containing file contents
+	 */
+	private void populateLookup()
+		throws SrtmSourceException
+	{
+		BufferedReader in = null;
+		try
+		{
+			// in = SrtmViewfinderSource.class.getResourceAsStream("viewfinder/tiles.db");
+			_tile_lookup = new HashMap<SrtmTile, String>();
+			in = new BufferedReader(new InputStreamReader(SrtmViewfinderSource.class.getResourceAsStream("/tim/prune/function/srtm/viewfinder/tiles.dat")));
+			String line;
+			while ((line = in.readLine()) != null)
+			{
+				String[] parts = line.split(" ");
+				SrtmTile tile = new SrtmTile(Integer.parseInt(parts[0]), Integer.parseInt(parts[1]));
+				_tile_lookup.put(tile, parts[2]);
+			}
+		}
+		catch (Exception e) {
+			throw new SrtmSourceException("Exception trying to read tiles.db: " + e);
+		}
+		finally
+		{
+			try {
+				in.close();
+			}
+			catch (Exception e) {} // ignore
+		}
+	}
+
+	/**
+	 * Get the Url for the given tile
+	 * @param inTile Tile to get
+	 * @return URL
+	 */
+	private URL buildUrl(SrtmTile inTile)
+		throws SrtmSourceException
+	{
+		if (_tile_lookup == null)
+		{
+			populateLookup();
+		}
+		System.out.println(_tile_lookup.get(inTile));
+		String path = _tile_lookup.get(inTile);
+		if (path == null)
+		{
+			int key = inTile.hashCode();
+			System.out.println("inTile hashcode " + key);
+			for (HashMap.Entry<SrtmTile, String> e : _tile_lookup.entrySet())
+			{
+				if (e.getKey().getLatitude() == 51)
+				{
+					System.out.println(e.getKey().getTileName() + " - " + e.getKey().hashCode() + " -> " + e.getValue());
+				}
+			}
+			throw new SrtmSourceException("tile not in database "+inTile.getTileName());
+		}
+		try
+		{
+			return new URL(URL_PREFIX + path + getSourceExtension());
+		}
+		catch (MalformedURLException e)
+		{
+			e.printStackTrace();
+			throw new SrtmSourceException(e.getMessage());
+		}
+	}
+
+	public boolean isReadyToUse()
+	{
+		return true;
+	}
+
+	public boolean downloadTile(SrtmTile inTile)
+		throws SrtmSourceException
+	{
+		int redirects = 5;
+		URL tileUrl = buildUrl(inTile);
+		File outputFile = getCacheFileName(inTile);
+		System.out.println("Download: Need to download: " + tileUrl);
+
+		try
+		{
+			HttpURLConnection conn = (HttpURLConnection) tileUrl.openConnection();
+
+			// Define streams
+			FileOutputStream outStream = null;
+			InputStream inStream = null;
+
+			conn.setRequestProperty("User-Agent", "GpsPrune v" + GpsPrune.VERSION_NUMBER);
+
+			int status = conn.getResponseCode();
+			if (status == 200)
+			{
+				inStream = conn.getInputStream();
+			}
+			else if (status == 404)
+			{
+				throw new SrtmSourceException("Tile not found: "+conn.getURL());
+			}
+			else
+			{
+				throw new SrtmSourceException("Invalid response from server: " +status+conn.getContent());
+			}
+
+			outStream = new FileOutputStream(outputFile);
+
+			int c;
+			while ((c = inStream.read()) != -1)
+			{
+				outStream.write(c);
+			}
+			// Make sure streams are closed
+			try {inStream.close();} catch (Exception e) {}
+			try {outStream.close();} catch (Exception e) {}
+			return true;
+		}
+		catch (IOException e)
+		{
+			throw new SrtmSourceException("Error while downloading tile "+inTile.getTileName()+": "+e.getMessage());
+		}
+	}
+
+	public int getRowSize(SrtmTile inTile)
+	{
+		return 1201;
+	}
+}