Nginx Robots Exclude From Caching

What is Caching?

Caching is one of the most important tools when it comes to website performance. Caching allows web servers to store a copy of requested resources, such as images, CSS, and HTML, so that requests for these resources can be served more quickly and efficiently in the future.

By utilizing caching, website load times can be decreased dramatically, allowing visitors to view pages faster than ever before. In addition, caching can also be used to reduce server load, allowing web servers to handle more concurrent requests without needing to scale up the hardware.

Caching is typically used on static content, such as images and CSS files, but can also be used on dynamic content such as HTML pages. This is known as page caching, and it is often used in conjunction with a web server accelerators such as Nginx.

What is Nginx?

Nginx is a web server system developed by Igor Sysoev back in the early 2000s. It is a high performance web server that is known for its features and stability. In addition to being used as a web server, Nginx is also used as a reverse proxy, HTTP cache, and as a load balancer.

When used as a web server, Nginx can be configured to cache certain types of resources, such as images, CSS, and HTML files, in order to reduce page load times and improve overall website performance. Because of its caching capabilities, Nginx is often used as a front-end proxy for web applications as a way to reduce server load and improve performance.

How to Exclude a Post From Caching?

When using Nginx as a web server, there may be certain pages that you do not want to be cached. For example, if your site contains a page that displays frequently changing information, such as a blog post, you may not want it to be cached so that the most up-to-date version of the page is always presented to visitors.

To prevent Nginx from caching a specific page or post, you will need to add a special header to the response from Nginx that instructs the server to not cache the response. This header is known as the “Cache-Control: no-cache” header and it can be added in the Nginx configuration file.

For example, to exclude a page with the URL “/post” from being cached, you would add the following line to the Nginx configuration file:

    add_header Cache-Control: no-cache "/post";

Once this header has been added to the configuration file, any requests for the page will be served without being cached by Nginx.

How to Exclude a Directory or Sub Directory?

In addition to excluding individual pages from being cached, Nginx also allows you to exclude entire directories or sub-directories from being cached. To accomplish this, you will need to add a special header to the response from Nginx that instructs the server to not cache the response.

For example, to exclude the directory “/examples” from being cached, you would add the following line to the Nginx configuration file:

    add_header Cache-Control: no-cache "/examples/**";

Once this header has been added to the configuration file, any requests for files or folders within the specified directory will be served without being cached by Nginx.

How to Exclude a URL patterns?

In certain cases, Nginx can be configured to exclude certain URL patterns from being cached. This can be done by adding a regular expression to the “Cache-Control: no-cache” header. For example, if you wanted to exclude any URL that began with “/admin/” from being cached, you could add the following line to the Nginx configuration file:

    add_header Cache-Control: no-cache "^/admin/.*";

Once this header has been added to the configuration file, any requests that match the specified regular expression will be served without being cached by Nginx.

Conclusion

In conclusion, Nginx can be configured to exclude certain resources, directories, and URL patterns from being cached. This can be done by adding special headers to the Nginx configuration file. By excluding certain types of content from caching, you can ensure that your web server is optimized to serve the most up-to-date version of the content to your visitors.

FAQs

Q1: What is Caching?

A1: Caching is a mechanism in which web servers store a copy of requested resources, such as images, CSS, and HTML, so that requests for these resources can be served more quickly and efficiently in the future.

Q2: What is Nginx?

A2: Nginx is a web server system developed by Igor Sysoev back in the early 2000s. It is a high performance web server that is known for its features and stability.

Q3: How do I exclude a page from being cached?

A3: To exclude a page from being cached, you will need to add a special header to the Nginx configuration file. This header is known as the “Cache-Control: no-cache” header and can be added using the add_header directive.

Q4: How do I exclude a directory or sub-directory from being cached?

A4: To exclude a directory or sub-directory from being cached, you will need to add a special header to the Nginx configuration file. This header is known as the “Cache-Control: no-cache” header and can be added using the add_header directive.

Q5: How do I exclude a URL pattern from being cached?

A5: To exclude a URL pattern from being cached, you will need to add a special header to the Nginx configuration file. This header is known as the “Cache-Control: no-cache” header and can be added using the add_header directive along with a regular expression.

Thank you for reading this article. Please read other articles related to Nginx and caching.