cURL Timeout controls for how many seconds or milliseconds a connection should be made available for transfer or data.

This code snippet will get the size of the remote file without actually downloading it. cURL is a command-line tool and a library, that allows you to transfer data to or from a server using various protocols, such as HTTP, FTP, and others

The HTTP 401 Unauthorized response status code indicates that the client request has not been completed because it lacks valid authentication credentials for the requested resource. In order to access the resource client must provide a credential to access it.

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There are many HTTP methods available to clients to access data and resources from server. Most used HTTP methods are GET and POST. GET request are simple and request is part for URL. It supports up to 4 KB of data sent as part of URL to the server.