/// <summary>
/// Gets a (possibly big) resource, given its URI.
/// </summary>
/// <param name="Uri">Uniform resource identifier.</param>
/// <param name="TimeoutMs">Timeout, in milliseconds. (Default=60000)</param>
/// <param name="Headers">Optional headers. Interpreted in accordance with the corresponding URI scheme.</param>
/// <returns>Content-Type, together with a Temporary file, if resource has been downloaded, or null if resource is data-less.</returns>
public static Task <KeyValuePair <string, TemporaryFile> > GetTempFileAsync(Uri Uri, int TimeoutMs, params KeyValuePair <string, string>[] Headers)
{
if (!CanGet(Uri, out Grade _, out IContentGetter Getter))
{
throw new ArgumentException("URI Scheme not recognized: " + Uri.Scheme, nameof(Uri));
}
return(Getter.GetTempFileAsync(Uri, TimeoutMs, Headers));
}