fix(http-server): use loopback instead of 0.0.0.0/[::] in URLs

Host values `0.0.0.0` (IPv4) and `::` (IPv6), which mean "any host",
are not supported by certain browsers and platforms, e.g. Safari on
MacOS or Windows.

This commit fixes the `url` getter to convert these "any host" values
into a loopback address (`127.0.0.1` for IPV4 or `::1` for IPv6).

Author: bajtos

packages/http-server/src/http-server.ts

@@ -145,7 +145,10 @@ export class HttpServer {
   public get url(): string {
     let host = this.host;
     if (this._address.family === 'IPv6') {
+      if (host === '::') host = '::1';
       host = `[${host}]`;
+    } else if (host === '0.0.0.0') {
+      host = '127.0.0.1';
     }
     return `${this._protocol}://${host}:${this.port}`;
   }

packages/http-server/test/integration/http-server.integration.ts

@@ -177,6 +177,20 @@ describe('HttpServer (integration)', () => {
     expect(response.statusCode).to.equal(200);
   });
 
+  it('converts host from [::] to [::1] in url', async () => {
+    // Safari on MacOS does not support http://[::]:3000/
+    server = new HttpServer(dummyRequestHandler, {host: '::'});
+    await server.start();
+    expect(server.url).to.equal(`http://[::1]:${server.port}`);
+  });
+
+  it('converts host from 0.0.0.0 to 127.0.0.1 in url', async () => {
+    // Windows does not support http://0.0.0.0:3000/
+    server = new HttpServer(dummyRequestHandler, {host: '0.0.0.0'});
+    await server.start();
+    expect(server.url).to.equal(`http://127.0.0.1:${server.port}`);
+  });
+
   function dummyRequestHandler(req: ServerRequest, res: ServerResponse): void {
     res.end();
   }