Proxy cache basics in Nginx - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to enable proxy caching in nginx.

Nginx

proxy_cache_path /var/cache/nginx levels=1:2 keys_zone=my_cache:10m [1] inactive=60m;

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

Amax_cache_size=1g

Bmax_size=1g

Cmax_cache=500m

Dmax_size=100m

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'max_cache' instead of 'max_size' causes nginx to ignore the limit.

Setting size without units (like '100') causes errors.

The max_size directive sets the maximum size of the cache. Here, max_size=100m limits the cache to 100 megabytes.

2fill in blank

medium

Complete the code to set the proxy cache key to the request URI.

Nginx

proxy_cache_key [1];

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A$request_method

B$host

C$request_uri

D$remote_addr

Attempts:

3 left

💡 Hint

Common Mistakes

Using $request_method caches by HTTP method, which is not unique enough.

Using $remote_addr caches by client IP, which is unrelated to the resource.

The proxy_cache_key defines the cache key. Using $request_uri caches based on the full request URI.

3fill in blank

hard

Fix the error in the proxy cache configuration to enable caching for 10 minutes.

Nginx

proxy_cache_valid 200 302 [1];

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

A10min

B10m

C600s

D10

Attempts:

3 left

💡 Hint

Common Mistakes

Using '10' without units causes nginx to ignore the setting.

Using '10min' is not recognized by nginx.

The proxy_cache_valid directive requires a time with units like 'm' for minutes. '10m' means 10 minutes.

4fill in blank

hard

Fill both blanks to set cache control headers and enable proxy caching in the location block.

Nginx

location / {
    proxy_cache [1];
    add_header [2] 'HIT from cache';
}

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

Amy_cache

BX-Cache-Status

CCache-Control

Dcache_zone

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Cache-Control' as header name here is incorrect for cache hit indication.

Using 'cache_zone' instead of the actual cache zone name causes errors.

proxy_cache my_cache; enables caching using the defined cache zone. add_header X-Cache-Status 'HIT from cache'; adds a header to indicate cache hits.

5fill in blank

hard

Fill all three blanks to create a dictionary of cached responses with keys as request URIs and values as status codes greater than 200.

Nginx

cached_responses = { [1]: [2] for [3] in responses if responses[[1]] > 200 }

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Auri

Bresponses[uri]

Dstatus

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names for key and loop variable causes errors.

Using 'status' as loop variable without defining it causes NameError.

This dictionary comprehension uses uri as the key and responses[uri] as the value, filtering for status codes greater than 200.