Lessons

Matching the Mime Type to the file

For each file on the server, the HTTP Content-Type header specifies the mime type file. Even the web page itself is of the text/html type. Each image format, CSS, JavaScript, XML files - any file has its own mime type.

By default, web servers specify the mime type based on the file extension. For png this is image/png, for pdf - application/pdf, etc. But sometimes, due to incorrect server settings or specific usage scenarios, the mime type value may be incorrect.

Errors in mime type rarely lead to serious problems, since browsers are able to automatically determine the file format by its contents. But if an erroneous mime type still causes a problem, then it is very specific and difficult to reproduce. Programmers will spend a lot of time before they realize that the problem is an incorrect mime type. Therefore, configure these values on your server.

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