Understanding the concept of scgi_no_cache in Nginx
Hello! Today, we want to explore a specific directive in the ngx_http_scgi_module module in Nginx. This directive is called scgi_no_cache, and it can be quite significant in scenarios where we need to manage caching for SCGI requests. So, join us to understand what this functionality exactly does and how we can utilize it.
The ngx_http_scgi_module provides us with the capability to interact with SCGI applications (specifically with an environment connected to CGI). In this section, we can implement various settings and configurations that affect the behavior of Nginx while interacting with these applications. One of these features is scgi_no_cache.
Using scgi_no_cache, you can specify whether Nginx should cache requests sent to SCGI or not. In other words, this directive helps you have better control over caching behavior for SCGI requests, thereby preventing unnecessary cache generation.
Now that we are familiar with the concept of scgi_no_cache, we would like to take a look at how this directive is implemented in the Nginx configuration file and how it works with real-world examples.
How to implement scgi_no_cache
location /example {
include fastcgi_params;
scgi_pass 127.0.0.1:9000;
scgi_no_cache 1;
}Code Explanation
location block:
This directive specifies that the settings inside it are for a specific path, in this case
/example, and actions will be applied here.include fastcgi_params:
With this line, the necessary parameters for processing SCGI requests will be included.
scgi_pass 127.0.0.1:9000:
This line specifies which server (in this case localhost on port 9000) the requests should be sent to.
scgi_no_cache 1:
With this line, caching for SCGI requests will be disabled, and consequently, Nginx will not cache these requests.