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/*
* 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 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("<html>\n");
System.out.printf("<head><title>Map Fetch Failure</title></head>\n");
System.out.printf("<body>%s</body>\n", reason);
System.out.printf("</html>\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();
}
}
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