onReq with finalhandler = Error

Why this code is not working?

HttpProxy2.web(req, source.http.res, {
	hostname: domainTarget.target.split("/")[0],
	port: domainTarget.port,

	onRes: function (req: Http2.Http2ServerRequest, res: Http2.Http2ServerResponse, proxyRes: Http.ServerResponse, callback: ()=>any) {
		callback();
	}
}, function (err: Error, req: Http.IncomingMessage | Http2.Http2ServerRequest, res: Http.ServerResponse | Http2.Http2ServerResponse){
	if(err){
		FinalHandler(req, res)(err);
	}
});

Exception:

TypeError: Cannot read property 'Symbol(req)' of undefined
    at onComplete (E:\***\***\node_modules\http2-proxy\index.js:165:18)
    at Object.onRes (E:\***\***\lib\Worker.ts:332:29)
    at ClientRequest.onProxyResponse (E:\***\***\node_modules\http2-proxy\index.js:269:24)
    at ClientRequest.emit (events.js:182:13)
    at HTTPParser.parserOnIncomingClient [as onIncoming] (_http_client.js:546:21)
    at HTTPParser.parserOnHeadersComplete (_http_common.js:109:17)
    at Socket.socketOnData (_http_client.js:432:20)
    at Socket.emit (events.js:182:13)
    at addChunk (_stream_readable.js:283:12)
    at readableAddChunk (_stream_readable.js:264:11)
    at Socket.Readable.push (_stream_readable.js:219:10)
    at TCP.onread (net.js:639:20)

[Muhaah]

That works, but I think its kind of confusing and ugly for my use case. I only want to set some Headers and with the old version 1.3.2 its easy to accomplish. A function to add Headers to the response would be nice.

By the way: The proxyRes from onRes is not a real Http.ServerResponse | Http2.Http2ServerResponse object … proxyRes.getHeaders() failed.

And thanks for your support and help

[ronag]

If you want to use it you have to handle the proxyRes => res logic, i.e.

    res.statusCode = proxyRes.statusCode
    for (const [ key, value ] of Object.entries(proxyRes.headers)) {
      res.setHeader(key, value)
    }
    proxyRes.pipe(res)

You only need the callback if you want to finish before the usual life cycle of proxyRes and res.