Cannot change host using Agent in fetch.

[zbinlin]

I tried to change the host in fetch, but it didn't work.

import { fetch, Agent } from "undici";

const data = await fetch("https://www.example.com/", {
	dispatcher: new Agent({
		connect: {
                    host: '127.0.0.1',
                },
	}),
});
console.log(await data.text());

[metcoder95]

that won't work as the connection is done based on URL host, unless a factory is returned that patches the hostname.

What are you trying to achieve exactly?

[zbinlin]

I need to intercept and modify the host.

This is working:

const connector = buildConnector({});
...
dispatcher: new Agent({
     connect(opts, cb) {
          opts.hostname = "127.0.0.1";
          connector(opts, cb);
      },
}),
...

[metcoder95]

That is way to go

[zbinlin]

That is way to go

@metcoder95 If I want to use curl-like --connect-to option, do I have to create a connector like the one above? (I want to modify not only the host but also the port.)

[metcoder95]

Yes, correct