In the core's response.go, add an optional RedirectCodeSetter field or variadic use303 ...bool parameter to Redirect() and use the stored code + http.StatusSeeOther in core.go instead of the hardcoded http.StatusTemporaryRedirect, so that a POST handler can redirect to a GET route by calling c.Response.Redirect("/url", true).

core.go

@@ -308,7 +308,11 @@ func (app *App) makeHTTPRouterHandlerFunc(h Controller, ms []Hook) httprouter.Ha
 			w.WriteHeader(ctx.Response.statusCode)
 		}
 		if ctx.Response.redirectTo != "" {
-			http.Redirect(w, r, ctx.Response.redirectTo, http.StatusTemporaryRedirect)
+			statusCode := ctx.Response.redirectStatusCode
+			if statusCode == 0 {
+				statusCode = http.StatusTemporaryRedirect // default to 307
+			}
+			http.Redirect(w, r, ctx.Response.redirectTo, statusCode)
 		} else {
 			w.Write(ctx.Response.body)
 		}