spike: investigate localhost resolution RFC6761

test/curl/localhost.spec.ts

@@ -0,0 +1,69 @@
+import 'should'
+import { app, host, port, server } from '../helper/server'
+import { Curl } from '../../lib'
+
+let curl: Curl
+const urlLocalhost = `http://localhost:${port}/`
+const urlTestLocalhost = `http://test.localhost:${port}/`
+
+describe('DNS Resolution', () => {
+  before((done) => {
+    server.listen(port, host, () => done())
+
+    app.get('/', (req, res) => {
+      res.send({ message: 'resolved', ip: req.ip })
+    })
+  })
+
+  after((done) => {
+    server.close()
+    app._router.stack.pop()
+    done()
+  })
+
+  beforeEach(() => {
+    curl = new Curl()
+  })
+
+  afterEach(() => {
+    curl.close()
+  })
+
+  it('should resolve localhost to 127.0.0.1', (done) => {
+    curl.setOpt('URL', urlLocalhost)
+
+    curl.on('end', (status, data) => {
+      if (status !== 200) {
+        throw Error(`Invalid status code: ${status}`)
+      }
+
+      const result = JSON.parse(data as string)
+      result.message.should.be.equal('resolved')
+      result.ip.should.be.equal('::1') // IPv4-mapped IPv6 address often used by Node.js
+
+      done()
+    })
+
+    curl.on('error', done)
+    curl.perform()
+  })
+
+  it('should resolve test.localhost to 127.0.0.1', (done) => {
+    curl.setOpt('URL', urlTestLocalhost)
+
+    curl.on('end', (status, data) => {
+      if (status !== 200) {
+        throw Error(`Invalid status code: ${status}`)
+      }
+
+      const result = JSON.parse(data as string)
+      result.message.should.be.equal('resolved')
+      result.ip.should.be.equal('::1') // IPv4-mapped IPv6 address often used by Node.js
+
+      done()
+    })
+
+    curl.on('error', done)
+    curl.perform()
+  })
+})