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                         if (request == null) {
  73                                 set_status(400);
  74                                 System.out.printf("client failed %d\n", http_status);
  75                         } else {
  76
  77                                 double  lat = request.get_double("lat", AltosLib.MISSING);
  78                                 double  lon = request.get_double("lon", AltosLib.MISSING);
  79                                 int     zoom = request.get_int("zoom", AltosLib.MISSING);
  80                                 String  addr = request.get_string("remote_addr", null);
  81
  82                                 if (lat == AltosLib.MISSING ||
  83                                     lon == AltosLib.MISSING ||
  84                                     zoom == AltosLib.MISSING ||
  85                                     addr == null)
  86                                 {
  87                                         set_status(400);
  88                                 } else if (!AltosMapd.check_lat_lon(lat, lon)) {
  89                                         set_status(403);        /* Forbidden */
  90                                 } else {
  91
  92                                         store_ready = new Semaphore(0);
  93
  94                                         AltosMapStore   map_store = AltosMapStore.get(new AltosLatLon(lat, lon),
  95                                                                                       zoom,
  96                                                                                       AltosMapd.maptype,
  97                                                                                       AltosMapd.px_size,
  98                                                                                       AltosMapd.scale);
  99                                         int status;
 100
 101                                         if (map_store == null) {
 102                                                 status = AltosMapTile.failed;
 103                                         } else {
 104                                                 map_store.add_listener(this);
 105
 106                                                 try {
 107                                                         store_ready.acquire();
 108                                                 } catch (Exception ie) {
 109                                                 }
 110
 111                                                 status = map_store.status();
 112                                         }
 113
 114                                         if (status == AltosMapTile.fetched || status == AltosMapTile.loaded) {
 115                                                 set_status(200);
 116                                                 set_file(map_store.file);
 117                                         } else if (status == AltosMapTile.failed) {
 118                                                 set_status(404);
 119                                         } else if (status == AltosMapTile.fetching) {
 120                                                 set_status(408);
 121                                         } else if (status == AltosMapTile.bad_request) {
 122                                                 set_status(400);
 123                                         } else if (status == AltosMapTile.forbidden) {
 124                                                 set_status(403);
 125                                         } else {
 126                                                 set_status(400);
 127                                         }
 128                                 }
 129                                 System.out.printf("%s: %.6f %.6f %d status %d\n",
 130                                                   addr, lat, lon, zoom, http_status);
 131                         }
 132                 } catch (Exception e) {
 133                         System.out.printf("client exception %s\n", e.toString());
 134                         e.printStackTrace(System.out);
 135                         set_status(400);
 136
 137                 } finally {
 138                         try {
 139                                 Writer writer = new PrintWriter(socket.getOutputStream());
 140                                 reply.write(writer);
 141                                 writer.write('\n');
 142                                 writer.flush();
 143                         } catch (IOException ie) {
 144                         }
 145                         try {
 146                                 socket.close();
 147                         } catch (IOException ie) {
 148                         }
 149                 }
 150         }
 151
 152         public AltosMapdClient(Socket socket) {
 153                 this.socket = socket;
 154                 start();
 155         }
 156 }