Update extensions/resteasy-classic/resteasy/runtime/src/main/java/io/quarkus/resteasy/runtime/AuthenticationRedirectExceptionMapper.java

Co-authored-by: Copilot <[email protected]>

Author: sberyozkin

extensions/resteasy-classic/resteasy/runtime/src/main/java/io/quarkus/resteasy/runtime/AuthenticationRedirectExceptionMapper.java

@@ -23,7 +23,8 @@ public Response toResponse(AuthenticationRedirectException ex) {
         if (ex.getCode() == 200) {
             // The target URL is embedded in the auto-submitted form post payload
             log.debugf("Form post redirect to %s", ex.getRedirectUri());
-            builder.entity(ex.getRedirectUri());
+            builder.entity(ex.getRedirectUri())
+                   .type("text/html; charset=UTF-8");
         } else {
             log.debugf("Redirect to %s ", ex.getRedirectUri());
             builder.header(HttpHeaders.LOCATION, ex.getRedirectUri());