Initial Commit - Copy from Altus Metrum AltOS

map-server/altos-mapd/AltosMapdClient.java

@@ -0,0 +1,156 @@
+/*
+ * Copyright © 2018 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ */
+
+package altosmapd;
+
+import java.net.*;
+import java.util.*;
+import java.util.concurrent.*;
+import java.io.*;
+
+import org.altusmetrum.altoslib_14.*;
+
+public class AltosMapdClient extends Thread implements AltosMapStoreListener {
+	private Socket		socket;
+	private AltosJson	request;
+	private AltosJson	reply;
+
+	private int		http_status;
+
+	private void set_status(int status) {
+		http_status = status;
+		reply.put("status", status);
+	}
+
+	private void set_filename(String filename) {
+		reply.put("filename", filename);
+
+	}
+
+	private void set_content_type(String content_type) {
+		reply.put("content_type", content_type);
+	}
+
+	private String content_type(File file) {
+		String content_type = "application/octet-stream";
+		String basename = file.getName();
+		if (basename.endsWith(".jpg"))
+			content_type = "image/jpeg";
+		if (basename.endsWith(".png"))
+			content_type = "image/png";
+		return content_type;
+	}
+
+	private void set_file(File file) {
+		set_filename(file.getAbsolutePath());
+		set_content_type(content_type(file));
+	}
+
+	private Semaphore store_ready;
+
+	public void notify_store(AltosMapStore map_store, int status) {
+		if (status != AltosMapTile.fetching)
+			store_ready.release();
+	}
+
+	public void run() {
+		reply = new AltosJson();
+		try {
+			request = AltosJson.fromInputStream(socket.getInputStream());
+
+			if (request == null) {
+				set_status(400);
+				System.out.printf("client failed %d\n", http_status);
+			} else {
+
+				double	lat = request.get_double("lat", AltosLib.MISSING);
+				double	lon = request.get_double("lon", AltosLib.MISSING);
+				int	zoom = request.get_int("zoom", AltosLib.MISSING);
+				String	addr = request.get_string("remote_addr", null);
+
+				if (lat == AltosLib.MISSING ||
+				    lon == AltosLib.MISSING ||
+				    zoom == AltosLib.MISSING ||
+				    addr == null)
+				{
+					set_status(400);
+				} else if (!AltosMapd.check_lat_lon(lat, lon, zoom)) {
+					set_status(403);	/* Forbidden */
+				} else {
+
+					store_ready = new Semaphore(0);
+
+					AltosMapStore	map_store = AltosMapStore.get(new AltosLatLon(lat, lon),
+										      zoom,
+										      AltosMapd.maptype,
+										      AltosMapd.px_size,
+										      AltosMapd.scale);
+					int status;
+
+					if (map_store == null) {
+						status = AltosMapTile.failed;
+					} else {
+						map_store.add_listener(this);
+
+						try {
+							store_ready.acquire();
+						} catch (Exception ie) {
+						}
+
+						status = map_store.status();
+					}
+
+					if (status == AltosMapTile.fetched || status == AltosMapTile.loaded) {
+						set_status(200);
+						set_file(map_store.file);
+					} else if (status == AltosMapTile.failed) {
+						set_status(404);
+					} else if (status == AltosMapTile.fetching) {
+						set_status(408);
+					} else if (status == AltosMapTile.bad_request) {
+						set_status(400);
+					} else if (status == AltosMapTile.forbidden) {
+						set_status(403);
+					} else {
+						set_status(400);
+					}
+				}
+				System.out.printf("%s: %.6f %.6f %d status %d\n",
+						  addr, lat, lon, zoom, http_status);
+			}
+		} catch (Exception e) {
+			System.out.printf("client exception %s\n", e.toString());
+			e.printStackTrace(System.out);
+			set_status(400);
+
+		} finally {
+			try {
+				Writer writer = new PrintWriter(socket.getOutputStream());
+				reply.write(writer);
+				writer.write('\n');
+				writer.flush();
+			} catch (IOException ie) {
+			}
+			try {
+				socket.close();
+			} catch (IOException ie) {
+			}
+		}
+	}
+
+	public AltosMapdClient(Socket socket) {
+		this.socket = socket;
+		start();
+	}
+}