NGINX $request_uri vs $uri

Question

How do you determine when to use $request_uri vs $uri?

According to NGINX documentation, $request_uri is the original request (for

Answer 1

Another difference about $uri and $request_uri in proxy_cache_key is $request_uri will include anchor tags part, but $uri$is_args$args will ignore it

Do a curl operation : curl -I static.io/hello.htm?id=1#/favor/goods :

proxy_cache_key $scheme://$host$uri$is_args$args; => Cache KEY: http://static.io/hello.htm?id=1
proxy_cache_key $scheme://$host$request_uri; => Cache KEY: http://static.io/hello.htm?id=1#/favor/goods

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Nginx Document: http://nginx.org/en/docs/http/ngx_http_core_module.html#var_request_uri

• $request_uri : full original request URI (with arguments)
• $uri: current URI in request, normalized The value of $uri may change during request processing, e.g. when doing internal redirects, or when using index files.

Proxy Cache key: http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_cache_key