Hi,

I was reading world famous tutorial by Emiller. Nginx guide to module
development.

I was going to ngx_http_proxy_handler() as described in tutorial.

I seen request structure is stored in two places in upstream.

u->pipe->input_filter = ngx_http_proxy_copy_filter;
u->pipe->input_ctx = r; <<------

u->input_filter_init = ngx_http_proxy_input_filter_init;
u->input_filter = ngx_http_proxy_non_buffered_copy_filter;
u->input_filter_ctx = r; <<------

Whats the difference between two variables?

If we want to take request structure from upstream in later stage before
selecting server which value to be used?

Awaiting for reply.
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