diff options
| -rw-r--r-- | modules/caddyhttp/reverseproxy/reverseproxy.go | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/modules/caddyhttp/reverseproxy/reverseproxy.go b/modules/caddyhttp/reverseproxy/reverseproxy.go index 7971348..bb1453a 100644 --- a/modules/caddyhttp/reverseproxy/reverseproxy.go +++ b/modules/caddyhttp/reverseproxy/reverseproxy.go @@ -329,10 +329,17 @@ func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request, next caddyht fmt.Errorf("preparing request for upstream round-trip: %v", err)) } - // we will need the original headers and Host - // value if header operations are configured - reqHeader := r.Header + // we will need the original headers and Host value if + // header operations are configured; and we should + // restore them after we're done if they are changed + // (for example, changing the outbound Host header + // should not permanently change r.Host; issue #3509) reqHost := r.Host + reqHeader := r.Header + defer func() { + r.Host = reqHost + r.Header = reqHeader + }() start := time.Now() |