Trailing slash normalization in Nginx - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to redirect URLs ending with a slash to the same URL without the slash.

Nginx

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

Drag options to blanks, or click blank then click option'

A$1

B$1/

C$2

D$0

Attempts:

3 left

💡 Hint

Common Mistakes

Using $1/ adds an extra slash instead of removing it.

Using $0 repeats the whole matched string including the slash.

The rewrite directive uses $1 to capture the URL without the trailing slash and redirects permanently.

2fill in blank

medium

Complete the code to redirect URLs without a trailing slash to the same URL with a slash.

Nginx

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

Drag options to blanks, or click blank then click option'

A$1/

B$2/

C$1

D$0/

Attempts:

3 left

💡 Hint

Common Mistakes

Using $1 without slash does not add the trailing slash.

Using $0/ repeats the whole matched string and adds slash redundantly.

The rewrite adds a trailing slash by appending / to the captured URL $1.

3fill in blank

hard

Fix the error in the location block to normalize trailing slashes by redirecting URLs ending with a slash to without slash.

Nginx

location / {
    if ($request_uri ~ [1]) {
        return 301 $scheme://$host$1;
    }
}

Drag options to blanks, or click blank then click option'

A^(.+)$

B^(.+)/

C^(.+)/$

D^(.+)$/

Attempts:

3 left

💡 Hint

Common Mistakes

Using a pattern without the trailing slash does not match URLs ending with slash.

Missing parentheses means $1 is undefined.

The regex ^(.+)/$ matches URLs ending with a slash and captures the part before it in $1 for redirection.

4fill in blank

hard

Fill both blanks to create a map that normalizes URLs by removing trailing slashes except for root.

Nginx

map $request_uri $normalized_uri {
    default [1];
    ~^(.+)/$ [2];
}

Drag options to blanks, or click blank then click option'

A$request_uri

B$1

C/

D$uri

Attempts:

3 left

💡 Hint

Common Mistakes

Using / as default removes all URIs incorrectly.

Using $uri instead of $request_uri changes the variable meaning.

The map keeps the original URI by default and removes trailing slashes by capturing the part before the slash in $1.

5fill in blank

hard

Fill all three blanks to rewrite URLs to normalized form and redirect permanently.

Nginx

server {
    listen 80;
    server_name example.com;

    map $request_uri $normalized_uri {
        default [1];
        ~^(.+)/$ [2];
    }

    location / {
        if ($request_uri != [3]) {
            return 301 $scheme://$host$normalized_uri;
        }
    }
}

Drag options to blanks, or click blank then click option'

A$request_uri

B$1

C$normalized_uri

D$uri

Attempts:

3 left

💡 Hint

Common Mistakes

Using $uri instead of $request_uri in map default.

Comparing $request_uri with $uri instead of $normalized_uri.

Not capturing $1 in map regex.

The map sets default to $request_uri, removes trailing slash with $1, and the if condition compares $request_uri with $normalized_uri to redirect.