PUBLIC MARKS with tags http & 404

Diagram An activity diagram to describe the resolution of HTTP response status codes, given various headers. The diagram is available in various formats:

For years we have praised the wonders of user friendly 404 error messages tailored to the website. But most often such error messages are as bad as they can be even forgetting to use the 404 status code in the HTTP header. It is high time to reconsider if the job is better left to an improved default 404 provided by web servers where it naturally belongs

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