├── .gitignore
├── Makefile
├── Procfile
├── README.md
├── index.js
└── package.json


/.gitignore:
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1 | GeoLite2-City.mmdb
2 | node_modules/
3 | .env
4 | 


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/Makefile:
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 1 | all: GeoLite2-City.mmdb node_modules
 2 | 
 3 | clean:
 4 | 	rm GeoLite2-City.mmdb
 5 | 	rm -rf node_modules
 6 | 
 7 | .PHONY: all clean
 8 | 
 9 | GeoLite2-City.mmdb:
10 | 	curl -O http://geolite.maxmind.com/download/geoip/database/GeoLite2-City.mmdb.gz
11 | 	gunzip GeoLite2-City.mmdb.gz
12 | 
13 | node_modules: package.json
14 | 	npm install
15 | 


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/Procfile:
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1 | web: make && node index.js
2 | 


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/README.md:
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1 | ## node-geoip-web
2 | 
3 | An Express server that returns location information using the GeoLite2
4 | database.
5 | 


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/index.js:
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 1 | var express = require('express');
 2 | var ip = require('ipv6');
 3 | var MaxMind = require('maxmind-db-reader');
 4 | var _ = require('lodash');
 5 | 
 6 | var db = new MaxMind('./GeoLite2-City.mmdb');
 7 | 
 8 | // Uses equirectangular approximation for speed
 9 | function approximateDistance(lat1, lon1, lat2, lon2) {
10 |   lat1 = lat1 * Math.PI / 180;
11 |   lon1 = lon1 * Math.PI / 180;
12 | 
13 |   lat2 = lat2 * Math.PI / 180;
14 |   lon2 = lon2 * Math.PI / 180;
15 | 
16 |   var R = 6371;
17 | 
18 |   var x = (lon2 - lon1) * Math.cos((lat1 + lat2) / 2);
19 |   var y = (lat2 - lat1);
20 | 
21 |   return Math.sqrt(x * x + y * y) * R;
22 | }
23 | 
24 | function resultFromAddress(req, opt_address) {
25 |   if (!opt_address) {
26 |     opt_address = _.last(req.ips) || req.connection.remoteAddress;
27 |   }
28 | 
29 |   var geoData = db.getGeoData(opt_address);
30 | 
31 |   if (!geoData || !geoData.location) {
32 |     return {
33 |       ip: opt_address,
34 |       location: 'unknown'
35 |     };
36 |   }
37 | 
38 |   var result = {
39 |     ip: opt_address
40 |   };
41 | 
42 |   if (req.param('fields')) {
43 |     var fields = req.param('fields').split(',');
44 | 
45 |     fields.forEach(function (field) {
46 |       result[field] = geoData[field];
47 |     });
48 |   } else {
49 |     result.country = geoData.country;
50 |     result.location = geoData.location;
51 |   }
52 | 
53 |   if (req.param('lat') && req.param('lon') && req.param('distance')) {
54 |     var lat = parseFloat(req.param('lat'), 10);
55 |     var lon = parseFloat(req.param('lon'), 10);
56 | 
57 |     var distance = parseInt(req.param('distance'), 10);
58 | 
59 |     result.distance = approximateDistance(geoData.location.latitude,
60 |       geoData.location.longitude, lat, lon) < distance;
61 |   }
62 | 
63 |   return result;
64 | }
65 | 
66 | var app = express();
67 | 
68 | app.enable('trust proxy');
69 | 
70 | app.get('/', function (req, res) {
71 |   res.jsonp(resultFromAddress(req));
72 | });
73 | 
74 | app.get(/^\/(robots\.txt|favicon\.ico)$/, function (req, res) {
75 |   res.send(404);
76 | });
77 | 
78 | app.get('/:address', function (req, res) {
79 |   var v4 = new ip.v4.Address(req.param('address'));
80 |   var v6 = new ip.v6.Address(req.param('address'));
81 | 
82 |   if (!v4.isValid() && !v6.isValid()) {
83 |     return res.jsonp(500, { error: 'Invalid IP Address' });
84 |   }
85 | 
86 |   res.jsonp(resultFromAddress(req, req.param('address')));
87 | });
88 | 
89 | app.listen(process.env.PORT || 3000);
90 | 


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/package.json:
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 1 | {
 2 |   "name": "geoip-web",
 3 |   "version": "1.0.1",
 4 |   "description": "A very small server that answers queries via GeoLite2-City.",
 5 |   "author": "Beau Gunderson <beau@beaugunderson.com>",
 6 |   "main": "index.js",
 7 |   "repository": {
 8 |     "type": "git",
 9 |     "url": "https://github.com/tfrce/node-geoip-web.git"
10 |   },
11 |   "engines": {
12 |     "node": "0.10.x"
13 |   },
14 |   "dependencies": {
15 |     "express": "~3.4.8",
16 |     "lodash": "~2.4.1",
17 |     "maxmind-db-reader": "~0.0.2",
18 |     "ipv6": "~3.1.1"
19 |   },
20 |   "license": "MIT"
21 | }
22 | 


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