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 int             http_status;
  30
  31         private void set_status(int status) {
  32                 http_status = status;
  33                 reply.put("status", status);
  34         }
  35
  36         private void set_filename(String filename) {
  37                 reply.put("filename", filename);
  38
  39         }
  40
  41         private void set_content_type(String content_type) {
  42                 reply.put("content_type", content_type);
  43         }
  44
  45         private String content_type(File file) {
  46                 String content_type = "application/octet-stream";
  47                 String basename = file.getName();
  48                 if (basename.endsWith(".jpg"))
  49                         content_type = "image/jpeg";
  50                 if (basename.endsWith(".png"))
  51                         content_type = "image/png";
  52                 return content_type;
  53         }
  54
  55         private void set_file(File file) {
  56                 set_filename(file.getAbsolutePath());
  57                 set_content_type(content_type(file));
  58         }
  59
  60         private Semaphore store_ready;
  61
  62         public void notify_store(AltosMapStore map_store, int status) {
  63                 if (status != AltosMapTile.fetching)
  64                         store_ready.release();
  65         }
  66
  67         public void run() {
  68                 reply = new AltosJson();
  69                 try {
  70                         request = AltosJson.fromInputStream(socket.getInputStream());
  71
  72                         double  lat = request.get_double("lat", AltosLib.MISSING);
  73                         double  lon = request.get_double("lon", AltosLib.MISSING);
  74                         int     zoom = request.get_int("zoom", AltosLib.MISSING);
  75                         String  addr = request.get_string("remote_addr", null);
  76
  77                         if (lat == AltosLib.MISSING ||
  78                             lon == AltosLib.MISSING ||
  79                             zoom == AltosLib.MISSING ||
  80                             addr == null)
  81                         {
  82                                 set_status(400);
  83                         } else if (!AltosMapd.check_lat_lon(lat, lon)) {
  84                                 set_status(403);        /* Forbidden */
  85                         } else {
  86
  87                                 store_ready = new Semaphore(0);
  88
  89                                 AltosMapStore   map_store = AltosMapStore.get(new AltosLatLon(lat, lon),
  90                                                                               zoom,
  91                                                                               AltosMapd.maptype,
  92                                                                               AltosMapd.px_size,
  93                                                                               AltosMapd.scale);
  94                                 int status;
  95
  96                                 if (map_store == null) {
  97                                         status = AltosMapTile.failed;
  98                                 } else {
  99                                         map_store.add_listener(this);
 100
 101                                         try {
 102                                                 store_ready.acquire();
 103                                         } catch (Exception ie) {
 104                                         }
 105
 106                                         status = map_store.status();
 107                                 }
 108
 109                                 if (status == AltosMapTile.fetched || status == AltosMapTile.loaded) {
 110                                         set_status(200);
 111                                         set_file(map_store.file);
 112                                 } else if (status == AltosMapTile.failed) {
 113                                         set_status(404);
 114                                 } else if (status == AltosMapTile.fetching) {
 115                                         set_status(408);
 116                                 } else if (status == AltosMapTile.bad_request) {
 117                                         set_status(400);
 118                                 } else if (status == AltosMapTile.forbidden) {
 119                                         set_status(403);
 120                                 } else {
 121                                         set_status(400);
 122                                 }
 123                         }
 124                         System.out.printf("%s: %.6f %.6f %d status %d\n",
 125                                           addr, lat, lon, zoom, http_status);
 126
 127                 } catch (Exception e) {
 128                         System.out.printf("client exception %s\n", e.toString());
 129                         e.printStackTrace(System.out);
 130                         set_status(400);
 131
 132                 } finally {
 133                         try {
 134                                 Writer writer = new PrintWriter(socket.getOutputStream());
 135                                 reply.write(writer);
 136                                 writer.write('\n');
 137                                 writer.flush();
 138                         } catch (IOException ie) {
 139                         }
 140                         try {
 141                                 socket.close();
 142                         } catch (IOException ie) {
 143                         }
 144                 }
 145         }
 146
 147         public AltosMapdClient(Socket socket) {
 148                 this.socket = socket;
 149                 start();
 150         }
 151 }