Syntax: proxy_cache_purge string ...; Default: — Context: http, server, location This directive appeared in version 1.5.7. Defines conditions under which the request will be considered a cache purge request. If at least one value of the string parameters is not empty and is not equal to “0” then the cache entry with a corresponding cache key is removed. The result of successful operation is indicated by returning the 204 (No Content) response. If the cache key of a purge request

Syntax: proxy_cache_path path [levels=levels] [use_temp_path=on|off] keys_zone=name:size [inactive=time] [max_size=size] [manager_files=number] [manager_sleep=time] [manager_threshold=time] [loader_files=number] [loader_sleep=time] [loader_threshold=time] [purger=on|off] [purger_files=number] [purger_sleep=time] [purger_threshold=time]; Default: — Context: http Sets the path and other parameters of a cache. Cache data

Syntax: proxy_cache_min_uses number; Default: proxy_cache_min_uses 1; Context: http, server, location Sets the number of requests after which the response will be cached.

Syntax: proxy_cache_methods GET | HEAD | POST ...; Default: proxy_cache_methods GET HEAD; Context: http, server, location This directive appeared in version 0.7.59. If the client request method is listed in this directive then the response will be cached. “GET” and “HEAD” methods are always added to the list, though it is recommended to specify them explicitly. See also the proxy_no_cache directive.

Syntax: proxy_cache_max_range_offset number; Default: — Context: http, server, location This directive appeared in version 1.11.6. Sets an offset in bytes for byte-range requests. If the range is beyond the offset, the range request will be passed to the proxied server and the response will not be cached.

Syntax: proxy_cache_lock_timeout time; Default: proxy_cache_lock_timeout 5s; Context: http, server, location This directive appeared in version 1.1.12. Sets a timeout for proxy_cache_lock. When the time expires, the request will be passed to the proxied server, however, the response will not be cached. Before 1.7.8, the response could be cached.

Syntax: proxy_cache_lock_age time; Default: proxy_cache_lock_age 5s; Context: http, server, location This directive appeared in version 1.7.8. If the last request passed to the proxied server for populating a new cache element has not completed for the specified time, one more request may be passed to the proxied server.

Syntax: proxy_cache_lock on | off; Default: proxy_cache_lock off; Context: http, server, location This directive appeared in version 1.1.12. When enabled, only one request at a time will be allowed to populate a new cache element identified according to the proxy_cache_key directive by passing a request to a proxied server. Other requests of the same cache element will either wait for a response to appear in the cache or the cache lock for this element to be released, up to the ti

Syntax: proxy_cache_key string; Default: proxy_cache_key $scheme$proxy_host$request_uri; Context: http, server, location Defines a key for caching, for example proxy_cache_key "$host$request_uri $cookie_user"; By default, the directive’s value is close to the string proxy_cache_key $scheme$proxy_host$uri$is_args$args;

Syntax: proxy_cache_convert_head on | off; Default: proxy_cache_convert_head on; Context: http, server, location This directive appeared in version 1.9.7. Enables or disables the conversion of the “HEAD” method to “GET” for caching. When the conversion is disabled, the cache key should be configured to include the $request_method.