├── .gitignore
├── README.md
├── api
    └── country.js
├── ip2location.ipv4.sql
├── package.json
└── public
    ├── favicon.ico
    └── index.html


/.gitignore:
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1 | node_modules/
2 | sqlite/
3 | package-lock.json
4 | .vercel
5 | *.CSV
6 | 


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/README.md:
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 1 | # Vercel SQLite ip2location demo
 2 | 
 3 | <sup><strong>Photo by <a href="https://unsplash.com/@miracleday?utm_source=unsplash&amp;utm_medium=referral&amp;utm_content=creditCopyText">Elena Mozhvilo</a> on <a href="https://unsplash.com/s/photos/earth?utm_source=unsplash&amp;utm_medium=referral&amp;utm_content=creditCopyText">Unsplash</a></strong></sup>
 4 | 
 5 | ## [Live Demo](https://vercel-sqlite-demo.vercel.app/)
 6 | 
 7 | Wait for the `fetch('api/country')` to show where you come from.
 8 | 
 9 | ## How to test
10 | 
11 |   * fork or clone this repository and go into its folder
12 |   * download [IPV4 CSV](https://lite.ip2location.com/database/ip-country)
13 |   * copy the unzipped `IP2LOCATION-LITE-DB1.CSV` file into the folder
14 |   * create an `sqlite` directory (`mkdir -p sqlite`) and run `sqlite3 sqlite/ip2location.ipv4`
15 |   * copy and paste [ip2location.ipv4.sql](./ip2location.ipv4.sql) content in the *SQLite* shell
16 |   * run `npx vercel --prod` to deploy
17 | 
18 | ## Please Note
19 | 
20 | While having a static, read-only, *SQLite* database on *vercel* could be handy in various situations, you cannot upload more than *100MB* as deploy/build size in there, so be aware this technique might not scale.
21 | 


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/api/country.js:
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 1 | const {join} = require('path');
 2 | const {now} = require('perf_hooks').performance;
 3 | 
 4 | const {Database} = require('sqlite3');
 5 | const SQLiteTag = require('sqlite-tag');
 6 | 
 7 | const ip2location = join(__dirname, '..', 'sqlite', 'ip2location.ipv4');
 8 | 
 9 | const ipv4 = {
10 |   _: [16777216, 65536, 256, 1],
11 |   $: (whole, current, i) => (whole + current * ipv4._[i]),
12 |   asInt: ip => ip.split('.').reduce(ipv4.$, 0),
13 |   asRegExp: /^(?:\d+\.){3}\d+$/
14 | };
15 | 
16 | module.exports = async (req, res) => {
17 |   const address = req.headers['x-forwarded-for'] || req.connection.remoteAddress;
18 |   if (ipv4.asRegExp.test(address)) {
19 |     const time = now();
20 |     const db = new Database(ip2location);
21 |     const {get} = SQLiteTag(db);
22 |     const location = await get`
23 |       SELECT
24 |         country_code AS code,
25 |         country_name AS name
26 |       FROM
27 |         ip2location
28 |       WHERE
29 |         ${ipv4.asInt(address)}
30 |       BETWEEN ip_from AND ip_to
31 |     `;
32 |     db.close();
33 |     res.setHeader('x-served-in', `${(now() - time).toFixed(2)}ms`);
34 |     res.json(location || {code: '❔', name: 'Unknown'});
35 |   }
36 |   else
37 |     res.json({code: '⚠', name: 'Invalid IP'});
38 | };
39 | 


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/ip2location.ipv4.sql:
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 1 | -- mkdir -p sqlite
 2 | -- sqlite3 sqlite/ip2location.ipv4
 3 | 
 4 | CREATE TABLE ip2location (
 5 |   ip_from INT(10),
 6 |   ip_to INT(10),
 7 |   country_code CHAR(2),
 8 |   country_name VARCHAR(64),
 9 |   PRIMARY KEY(ip_from, ip_to)
10 | );
11 | 
12 | -- https://lite.ip2location.com/database/ip-country
13 | .mode csv
14 | .import IP2LOCATION-LITE-DB1.CSV ip2location
15 | 
16 | DELETE FROM ip2location WHERE country_code = "-";
17 | 
18 | -- SELECT country_code AS code, country_name AS name FROM ip2location WHERE 35977539 BETWEEN ip_from AND ip_to;
19 | 
20 | .exit
21 | 


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/package.json:
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 1 | {
 2 |   "private": true,
 3 |   "name": "vercel-sqlite-demo",
 4 |   "type": "commonjs",
 5 |   "description": "Vercel SQLite ip2location demo",
 6 |   "author": "Andrea Giammarchi",
 7 |   "license": "ISC",
 8 |   "dependencies": {
 9 |     "sqlite-tag": "^1.1.0",
10 |     "sqlite3": "^5.0.0"
11 |   }
12 | }
13 | 


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/public/favicon.ico:
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https://raw.githubusercontent.com/WebReflection/vercel-sqlite-demo/0478decbe5ffee361c9aa27576d673a8978e5ca2/public/favicon.ico


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/public/index.html:
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 1 | <!DOCTYPE html>
 2 | <html lang="en">
 3 | <head>
 4 |   <meta charset="UTF-8">
 5 |   <meta name="viewport" content="width=device-width,initial-scale=1.0">
 6 |   <meta name="description" content="Vercel SQLite ip2location demo">
 7 |   <title>Vercel SQLite ip2location demo</title>
 8 |   <script>
 9 |   Promise.all([
10 |     fetch('api/country').then(b => b.json()),
11 |     new Promise($ => addEventListener('DOMContentLoaded', $, {once: true}))
12 |   ]).then(([{code, name}]) => {
13 |     document.querySelector('p:last-child').innerHTML =
14 |       `Your request came from <small>(${code})</small> <strong>${name}</strong> 👋`;
15 |   });
16 |   </script>
17 |   <style>
18 |   body { font-family: sans-serif; }
19 |   h1 { font-size: medium; }
20 |   a { color: initial; }
21 |   </style>
22 | </head>
23 | <body>
24 |   <h1><a href="https://vercel.com/">Vercel</a> SQLite ip2location demo</h1>
25 |   <p>
26 |     This site or product includes IP2Location LITE data available from
27 |     <a href="https://lite.ip2location.com">https://lite.ip2location.com</a>.
28 |   </p>
29 |   <p></p>
30 | </body>
31 | </html>
32 | 


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