HTTP response status codes indicate whether a specific HTTP request has been successfully completed
Common HTTP status codes and reason:
400 Bad Request
– This means that client-side input fails validation.
401 Unauthorized
– This means the user isn’t not authorized to access a resource. It usually returns when the user isn’t authenticated.
403 Forbidden
– This means the user is authenticated, but it’s not allowed to access a resource.
404 Not Found
– This indicates that a resource is not found.
500 Internal server error
– This is a generic server error. It probably shouldn’t be thrown explicitly.
502 Bad Gateway
– This indicates an invalid response from an upstream server.
503 Service Unavailable
– This indicates that something unexpected happened on server side (It can be anything like server overload, some parts of the system failed, etc.).
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