Is it possible to add a new header before the proxy request is sent?

[baens]

Hello!

I'm trying to create a rewrite filter that will add a new header that gets passed down to the proxy endpoint. It appears that the headers are read only for the filter. Is this intended, or was there a way to add this I just haven't been able to discover?

Thanks!

[xfeep]

@baens
Please try to use directive proxy_set_header.
BTW you can also try to set variables within rewrite handlers and use them with proxy_set_header.