Map Fetch Failure

/* * Copyright © 2018 Keith Packard * * 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 altosmap; import java.net.*; import java.io.*; import java.util.*; import java.text.*; import org.altusmetrum.altoslib_14.*; public class AltosMap { public final static int port = 16717; public final static String protocol_version = "1.0.0"; String query_string; String remote_addr; public String reason_string(int code) { switch (code) { case 200: return "OK"; case 400: return "Bad Request"; case 403: return "Forbidden"; case 404: return "Not Found"; case 408: return "Request Timeout"; default: return "Failure"; } } public void write_status(int status) { System.out.printf("Status: %d %s\n", status, reason_string(status)); } public void write_type(String type) { System.out.printf("Content-Type: %s\n", type); } public void fail(int status, String reason) { write_status(status); write_type("text/html"); System.out.printf("\n"); System.out.printf("\n"); System.out.printf("Map Fetch Failure\n"); System.out.printf("%s\n", reason); System.out.printf("\n"); System.exit(1); } public void process() { query_string = System.getenv("QUERY_STRING"); if (query_string == null) fail(400, "Missing query string"); remote_addr = System.getenv("REMOTE_ADDR"); if (remote_addr == null) fail(400, "Missing remote address"); String[] queries = query_string.split("&"); double lon = AltosLib.MISSING; double lat = AltosLib.MISSING; int zoom = AltosLib.MISSING; String version = null; try { for (String query : queries) { String[] q = query.split("="); if (q.length >= 2) { String name = q[0]; String value = q[1]; if (name.equals("lon")) lon = AltosParse.parse_double_net(value); else if (name.equals("lat")) lat = AltosParse.parse_double_net(value); else if (name.equals("zoom")) zoom = AltosParse.parse_int(value); else if (name.equals("version")) version = value; else fail(400, String.format("Extra query param \"%s\"", query)); } } } catch (ParseException pe) { fail(400, String.format("Invalid query: %s", pe.toString())); } if (version != null) { System.out.printf("Content-Type: text/plain\n"); System.out.printf("\n"); System.out.printf("%s\n", protocol_version); } else { if (lon == AltosLib.MISSING) fail(400, "Missing longitude"); if (lat == AltosLib.MISSING) fail(400, "Missing latitude"); if (zoom == AltosLib.MISSING) fail(400, "Missing zoom"); try { Socket socket = null; int tries = 0; while (tries < 10 && socket == null) { try { socket = new Socket(InetAddress.getLoopbackAddress(), port); } catch (IOException ie) { Thread.sleep(100); tries++; } } AltosJson request = new AltosJson(); request.put("lat", lat); request.put("lon", lon); request.put("zoom", zoom); request.put("remote_addr", remote_addr); Writer writer = new PrintWriter(socket.getOutputStream()); request.write(writer); writer.flush(); AltosJson reply = AltosJson.fromInputStream(socket.getInputStream()); int status = reply.get_int("status", 400); if (status != 200) fail(status, "Bad cache status"); String filename = reply.get_string("filename", null); try { File file = new File(filename); long length = file.length(); FileInputStream in = new FileInputStream(file); String content_type = reply.get_string("content_type", null); System.out.printf("Content-Type: %s\n", content_type); System.out.printf("Content-Length: %d\n", file.length()); System.out.printf("\n"); byte[] buf = new byte[4096]; int bytes_read; while ((bytes_read = in.read(buf)) > 0) System.out.write(buf); } catch (IOException ie) { fail(404, String.format("IO Exception: %s", ie.toString())); } } catch (Exception e) { fail(404, String.format("Exception %s", e.toString())); } } } public AltosMap() { } public static void main(final String[] args) { new AltosMap().process(); } }