Hi, I had a nginx working as reverse proxy, and all my backend are http
protocol.

I want to filter the content, for example, if the content has a work like
'virus', then nginx return a 403.
When I looked the ngx_http_sub_module, seems it can replace the content,
such as replace 'virus' to 'health', but can not return a 403?

Thanks.

--
from:baalchina
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