Trailing slash normalization in Nginx - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is trailing slash normalization in web servers?

Trailing slash normalization means making sure URLs either always end with a slash or never do, to keep URLs consistent and avoid duplicate content.

beginner

Why normalize trailing slashes in URLs?

To improve SEO by avoiding duplicate content and to ensure consistent URL handling by the server and browsers.

intermediate

How do you redirect URLs without trailing slash to ones with trailing slash in nginx?

Use a rewrite rule like:

rewrite ^([^.]*[^/])$ $1/ permanent;

This adds a slash at the end if missing.

intermediate

What does the nginx directive try_files $uri $uri/ =404; do related to trailing slashes?

It tries to serve the exact URI first, then the URI with a trailing slash, and returns 404 if neither exists. Helps handle directories and files properly.

intermediate

What is the difference between a 301 and 302 redirect in trailing slash normalization?

301 is a permanent redirect telling browsers and search engines the URL changed permanently. 302 is temporary. Use 301 for trailing slash normalization to keep SEO benefits.

Which nginx directive is commonly used to add a trailing slash to URLs missing it?

A root /var/www/html;

B proxy_pass http://backend;

C listen 80;

D rewrite ^([^.]*[^/])$ $1/ permanent;

The rewrite directive with that regex adds a trailing slash permanently.

What status code should you use for permanent trailing slash redirects?

A 200

B 301

C 302

D 404

301 means permanent redirect, which is best for SEO and trailing slash normalization.

What does the following nginx config do?

try_files $uri $uri/ =404;

A Blocks all requests

B Always redirects to homepage

C Tries file, then directory, else 404

D Enables gzip compression

It tries to serve the exact file, then the directory with slash, else returns 404.

Why avoid having both /page and /page/ accessible on your site?

A It causes duplicate content issues for SEO

B It confuses users

C It slows down the server

D It breaks HTTPS

Duplicate content can hurt SEO rankings, so normalize URLs to one form.

Which is true about trailing slash normalization?

A It ensures consistent URL format

B It only applies to image files

C It disables caching

D It requires changing DNS settings

Normalization makes URLs consistent, improving user experience and SEO.

Explain how to configure nginx to redirect URLs without trailing slashes to ones with trailing slashes.

Think about using rewrite with a regex and permanent flag.

Describe why trailing slash normalization is important for websites and SEO.

Consider how search engines treat URLs with and without slashes.