http header origin name preserve

[zouchengli]

The original HTTP request header is in uppercase, but it becomes lowercase after being forwarded by cilium-envoy. Is there any way to preserve the original header name without any processing?

[sayboras]

it's the default behaviour with Envoy proxy iiuc

https://www.envoyproxy.io/docs/envoy/latest/configuration/http/http_conn_man/header_casing

[zouchengli]

it's the default behaviour with Envoy proxy iiuc

https://www.envoyproxy.io/docs/envoy/latest/configuration/http/http_conn_man/header_casing

yes

but you can according envoyproxy header_formatters-preserve_case
enhance