Tengine Module Documentation: Headers module features

Ngx_http_headers_module

On the basis of the original setting expiration time of the nginx itself, the expires_by_types instruction is added to set the expiration time according to the Content-type.
The original function introduction look here.

Expires_by_types 24h html; Expires_by_types flushes +24h by; Expires_by_types @15h30m by; Expires_by_types 0 by; Expires_by_types-1 by; Expires_by_types epoch by;

Instructions

Syntax:expires_by_types [[Flushes] time | @time-of-day | epoch | max | off] Content-type1
[Content-type2] [Content-type3] ...
Default:-
Context:http, Server, location

The directive configures the expiration time and its corresponding content-type. The configuration of the expiration time can be referenced by the expires configuration. After configuring the time, you can add one to multiple content-type.

Note that when there are expires and Expires_by_types appear, the rules are as follows:

At the same level, if expires and Expires_by_type are present at the same time, the content-type that appear in Expires_by_type will be given priority in Expires_by_types. Instead of appearing in Content-type, the configuration in expires is selected, and when expires off is not configured at this level and at the previous level, expires and expires_by_types assign inheritance to the previous level of configuration information when there is no configuration at this level. And then follow the rule once; When this level is configured with expires off, the module ignores all configuration of expires_by_types and disables expires, when expires is not configured at this level, and when the upper level is configured with expires off, This level of expires_by_types will not be affected by the expires at the top level.

As：

Location/url {expires 10s; expires_by_types 24s html;}

At this point, url the following document, the HTML type returns the expiration time of 24s, while the other types return 10s of expiration.

Expires 10s; Expires_by_types 24s html; Location/url {expires_by_types 20s text/rss;}

At this point, url the following document, the Text/rss type returns the expiration time of 20s, while the other types return 10s of expiration. Because the expires_by_types inside the location will cover the upper Expires_by_types. The expires 10s was inherited.

Expires 10s; Expires_by_types 24s html; Location/url {expires off; expires_by_types 20s Text/rss;}

At this point, all documents below URL will not have an expiration date.

Expires off; Expires_by_types 24s html; Location/url {expires_by_types 20s text/rss;}

At this point, url the following document, the Text/rss type returns an expiration time of 20s, and no other type of time. Note that expires off does not inherit.