Map directive for variable mapping in Nginx - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a map that sets $cache_bypass to 1 when $arg_nocache is present.

Nginx

map $arg_nocache [1] {
    default 0;
    1 1;
}

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

A$cache_bypass_value

Bnocache_flag

C$nocache

D$cache_bypass

Attempts:

3 left

💡 Hint

Common Mistakes

Using the source variable instead of the target variable.

Omitting the dollar sign in variable names.

The map directive assigns values to the variable $cache_bypass based on $arg_nocache.

2fill in blank

medium

Complete the map directive to set $backend to 'server1' when $http_host is 'example.com'.

Nginx

map $http_host [1] {
    default backend_default;
    example.com server1;
}

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

A$server

B$backend

Cbackend

D$host_backend

Attempts:

3 left

💡 Hint

Common Mistakes

Using a variable name without the dollar sign.

Using an unrelated variable name.

The map directive sets the variable $backend based on the value of $http_host.

3fill in blank

hard

Fix the error in the map directive to correctly map $request_uri to $clean_uri by removing query strings.

Nginx

map $request_uri [1] {
    ~^(?<clean_uri>[^?]+) $clean_uri;
    default $request_uri;
}

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

A$clean_uri

Bclean_uri

C$uri_clean

D$clean

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting the dollar sign.

Using a different variable name than the capture group.

The target variable must be $clean_uri to store the mapped value.

4fill in blank

hard

Fill both blanks to create a map that sets $is_mobile to '1' if $http_user_agent contains 'Mobile', else '0'.

Nginx

map $http_user_agent [1] {
    ~Mobile [2];
    default 0;
}

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

A$is_mobile

B1

Ctrue

D$mobile_flag

Attempts:

3 left

💡 Hint

Common Mistakes

Using a variable name without a dollar sign.

Using 'true' instead of '1'.

The map sets $is_mobile to 1 when the user agent contains 'Mobile'.

5fill in blank

hard

Fill all three blanks to create a map that sets $env based on $host: 'prod' for 'example.com', 'dev' for 'dev.example.com', else 'test'.

Nginx

map $host [1] {
    example.com [2];
    dev.example.com [3];
    default test;
}

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

A$env

Bprod

Cdev

D$environment

Attempts:

3 left

💡 Hint

Common Mistakes

Using a variable name without a dollar sign.

Mixing up the values for hosts.

The map sets the variable $env to 'prod' or 'dev' based on the host, defaulting to 'test'.