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

[sayboras]

Oh I see — since this extension is already enabled in cilium/proxy, please feel free to give it a try!

One thing worth noting is that some changes may also be required on the cilium/cilium side. We already have quite a number of configuration flags in the proxy, so if the use case isn't broadly needed, it may be difficult to get the patch accepted.