feat: support IPFS_GATEWAY env

ipfs/specs#280

License: MIT
Signed-off-by: Marcin Rataj <lidel@lidel.org>

README.md

@@ -159,9 +159,16 @@ in multiple locations,  and stored as the new `GEOIP_ROOT` in `src/lookup.js`
 
 ## Testing in CLI
 
+It is possible to run tests against a local gateway by passing `HTTP_GATEWAY`:
+
+```console
+$ IPFS_GATEWAY="http://127.0.0.1:8080" npm test
+```
+
 You can find an example of how to use this in [`example/lookup.js`](example/lookup.js), which you can use like this:
 
 ```bash
+$ export IPFS_GATEWAY="http://127.0.0.1:8080"
 $ node example/lookup.js 66.6.44.4
 Result: {
   "country_name": "USA",

example/lookup.js

@@ -1,8 +1,7 @@
 import * as geoip from '../src/index.js'
 import { create } from 'ipfs-http-client'
 
-// This CLI tool requires Kubo RPC on 127.0.0.1:5001 to be running
-const ipfs = create(new URL('http://127.0.0.1:5001'))
+const ipfsGw = process?.env?.IPFS_GATEWAY || 'https://ipfs.io'
 
 if (process.argv.length !== 3) {
   console.log('usage: node lookup.js <ip4-adr>')
@@ -11,14 +10,14 @@ if (process.argv.length !== 3) {
 
 (async function() {
   try {
-    const result = await geoip.lookup(ipfs, process.argv[2])
+    const result = await geoip.lookup(ipfsGw, process.argv[2])
     console.log('Result: ' + JSON.stringify(result, null, 2))
   } catch (err) {
     console.log('Error: ' + err)
   }
 
   try {
-    const result = await geoip.lookupPretty(ipfs, '/ip4/' + process.argv[2])
+    const result = await geoip.lookupPretty(ipfsGw, '/ip4/' + process.argv[2])
     console.log('Pretty result: %s', result.formatted)
   } catch (err) {
     console.log('Error: ' + err)

test/lookup.spec.js

@@ -4,7 +4,7 @@ import * as geoip from '../src/index.js'
 describe('lookup via HTTP Gateway supporting application/vnd.ipld.raw responses', function () {
   this.timeout(100 * 1000)
 
-  const ipfsGW = 'https://ipfs.io'
+  const ipfsGW = process?.env?.IPFS_GATEWAY || 'https://ipfs.io'
 
   it('fails on 127.0.0.1', async () => {
     try {