scgi_no_cache
The `scgi_no_cache` directive controls server cache behavior for SCGI responses.
Description
The scgi_no_cache directive is utilized within the http, server, and location contexts to specify conditions under which SCGI (Simple Common Gateway Interface) responses should not be cached. You can use this directive to set specific request conditions that need to bypass the caching mechanism, allowing for more dynamic behavior tailored to specific requests.
The directive takes one or more arguments, which can be variables or conditions that determine when caching should be disabled. Each condition provided as an argument is evaluated, and if any of the conditions are met, the SCGI response is not stored in the cache. This is particularly useful in scenarios where responses might be volatile or user-specific, such as when data is frequently updated or returns sensitive information.
The placement of the scgi_no_cache directive can affect its operation. When placed within a location block, it will only apply to requests handled by that location. If defined in a server block, it affects all locations within that server, and if in an http block, it applies globally to the server. This directive thus provides flexible control over caching behaviors depending on application needs.
Config Example
server {
location /example {
scgi_pass 127.0.0.1:9000;
scgi_no_cache $arg_nocache;
}
}Ensure that the conditions specified do not unintentionally prevent caching when it's desired for certain responses.
Misconfiguration of the scgi_no_cache directive could lead to performance issues if caching is expected to be utilized.
Be careful with the syntax; incorrect conditions might result in unexpected behavior or errors.