private static string GetMultipartBoundary(this HttpContentHeaders headers)
{
if (headers == null)
{
throw new ArgumentNullException(nameof(headers));
}
if (headers.IsMultipart())
{
var boundaryParam = headers.ContentType.Parameters.FirstOrDefault(a =>
string.Equals(a.Name, "boundary", StringComparison.OrdinalIgnoreCase));
return(boundaryParam?.Value.Trim('"'));
}
return(null);
}
