cleanup follow redirect middleware

http/round_tripper.go

@@ -1,7 +1,6 @@
 package http
 
 import (
-	"fmt"
 	stdhttp "net/http"
 	"net/url"
 )
@@ -29,12 +28,13 @@ func (f *FollowRedirect) RoundTrip(req *stdhttp.Request) (*stdhttp.Response, err
 
 	if res.StatusCode >= 300 && res.StatusCode <= 399 {
 		loc := res.Header.Get("location")
-
-		fmt.Println("==> got a redirect, following...")
 		if loc != "" {
 			u, err := url.Parse(loc)
 			if err != nil {
-				panic("got an invalid URL from the `location` header")
+				// If the location header can't be parsed as a URL, exit early
+				// and return the original response without attempting to follow
+				// the redirect.
+				return res, nil
 			}
 			clone := req.Clone(req.Context())
 			clone.URL = u