git.gag.com Git - fw/altos/blob - map-server/altos-mapd/AltosMapdClient.java

   1 /*
   2  * Copyright © 2018 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  */
  14
  15 package altosmapd;
  16
  17 import java.net.*;
  18 import java.util.*;
  19 import java.util.concurrent.*;
  20 import java.io.*;
  21
  22 import org.altusmetrum.altoslib_13.*;
  23
  24 public class AltosMapdClient extends Thread implements AltosMapStoreListener {
  25         private Socket          socket;
  26         private AltosJson       request;
  27         private AltosJson       reply;
  28
  29         private void set_status(int status) {
  30                 reply.put("status", status);
  31         }
  32
  33         private void set_filename(String filename) {
  34                 reply.put("filename", filename);
  35
  36         }
  37
  38         private void set_content_type(String content_type) {
  39                 reply.put("content_type", content_type);
  40         }
  41
  42         private String content_type(File file) {
  43                 String content_type = "application/octet-stream";
  44                 String basename = file.getName();
  45                 if (basename.endsWith(".jpg"))
  46                         content_type = "image/jpeg";
  47                 if (basename.endsWith(".png"))
  48                         content_type = "image/png";
  49                 return content_type;
  50         }
  51
  52         private void set_file(File file) {
  53                 set_filename(file.getAbsolutePath());
  54                 set_content_type(content_type(file));
  55         }
  56
  57         private Semaphore store_ready;
  58
  59         public void notify_store(AltosMapStore map_store, int status) {
  60                 if (status != AltosMapTile.fetching)
  61                         store_ready.release();
  62         }
  63
  64         public void run() {
  65                 reply = new AltosJson();
  66                 try {
  67                         request = AltosJson.fromInputStream(socket.getInputStream());
  68
  69                         double  lat = request.get_double("lat", AltosLib.MISSING);
  70                         double  lon = request.get_double("lon", AltosLib.MISSING);
  71                         int     zoom = request.get_int("zoom", AltosLib.MISSING);
  72                         String  addr = request.get_string("remote_addr", null);
  73
  74                         if (lat == AltosLib.MISSING ||
  75                             lon == AltosLib.MISSING ||
  76                             zoom == AltosLib.MISSING ||
  77                             addr == null)
  78                         {
  79                                 set_status(400);
  80                         } else if (!AltosMapd.check_lat_lon(lat, lon)) {
  81                                 set_status(403);        /* Forbidden */
  82                         } else {
  83
  84                                 store_ready = new Semaphore(0);
  85
  86                                 System.out.printf("Fetching tile for %g %g %d\n", lat, lon, zoom);
  87
  88                                 AltosMapStore   map_store = AltosMapStore.get(new AltosLatLon(lat, lon),
  89                                                                               zoom,
  90                                                                               AltosMapd.maptype,
  91                                                                               AltosMapd.px_size,
  92                                                                               AltosMapd.scale);
  93                                 int status;
  94
  95                                 if (map_store == null) {
  96                                         System.out.printf("no store?\n");
  97                                         status = AltosMapTile.failed;
  98                                 } else {
  99                                         map_store.add_listener(this);
 100
 101                                         System.out.printf("Waiting for tile\n");
 102
 103                                         try {
 104                                                 store_ready.acquire();
 105                                         } catch (Exception ie) {
 106                                         }
 107
 108                                         status = map_store.status();
 109                                 }
 110
 111                                 if (status == AltosMapTile.fetched || status == AltosMapTile.loaded) {
 112                                         set_status(200);
 113                                         set_file(map_store.file);
 114                                 } else if (status == AltosMapTile.failed) {
 115                                         set_status(404);
 116                                 } else if (status == AltosMapTile.fetching) {
 117                                         set_status(408);
 118                                 } else if (status == AltosMapTile.bad_request) {
 119                                         set_status(400);
 120                                 } else if (status == AltosMapTile.forbidden) {
 121                                         set_status(403);
 122                                 } else {
 123                                         set_status(400);
 124                                 }
 125                         }
 126                 } catch (Exception e) {
 127                         System.out.printf("client exception %s\n", e.toString());
 128                         e.printStackTrace(System.out);
 129                         set_status(400);
 130
 131                 } finally {
 132                         try {
 133                                 Writer writer = new PrintWriter(socket.getOutputStream());
 134                                 reply.write(writer);
 135                                 writer.write('\n');
 136                                 writer.flush();
 137                         } catch (IOException ie) {
 138                         }
 139                         try {
 140                                 socket.close();
 141                         } catch (IOException ie) {
 142                         }
 143                         System.out.printf("client done\n");
 144                 }
 145         }
 146
 147         public AltosMapdClient(Socket socket) {
 148                 this.socket = socket;
 149                 start();
 150         }
 151 }