Design: How to Solve 503 Error of API when Resources are not available?

*Reposted to Blog

The HTTP 503 Error indidicates the server is busy. It might be due to the fact that the servers are overloaded (high load average).

One of my API is designed to return 503 Error when the cached file is not available. It is designed as the follows:

if (!is_file($file)) {
    throw_503();
    die();
}

The $file will be updated periodically e.g. every minute via Crontab. When the OS is writing to that file, the is_file will return false because the file is in-use.

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Every little helps! I hope this helps!

Steem On!~
*Reposted to Blog

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