reverseproxy: Support header selection policy on `Host` field (#3653)

Francis Lavoie committed Aug 17, 2020 at 17:14 UTC fc65320e9c5b4e2ab96b6b421b65629560f1b8a2

1 file changed +7

modules/caddyhttp/reverseproxy/selectionpolicies.go

@@ -362,6 +362,13 @@ func (s HeaderHashSelection) Select(pool UpstreamPool, req *http.Request) *Upstr

362 if s.Field == "" {

363 return nil

364 }

365 +

366 + // The Host header should be obtained from the req.Host field

367 + // since net/http removes it from the header map.

368 + if s.Field == "Host" && req.Host != "" {

369 + return hostByHashing(pool, req.Host)

370 + }

371 +

372 val := req.Header.Get(s.Field)

373 if val == "" {

374 return RandomSelection{}.Select(pool, req)