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> ## HTTP Responses

> An HTTP response contains a result code, header fields, and a body.

> The HTTP protocol expects the result code and all header fields to be returned before any body content.

> Some commonly used status codes include:

> - `404`: Indicates that the requested resource is not available
> - `401`: Indicates that the request requires HTTP authentication
> - `500`: Indicates that an error occurred inside the HTTP server that prevented it from fulfilling the request
> - `503`: Indicates that the HTTP server is temporarily overloaded and unable to handle the request

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