public static void VerifyETag(this IEntityWithETag newEntity, IEntityWithETag existingEntity)
{
if (existingEntity == null)
{
if (newEntity._ETag == "*")
{
throw new EntityTagMismatchException("Entity already exists.");
}
else
{
return;
}
}
if (!string.IsNullOrEmpty(newEntity?._ETag))
{
if (existingEntity?._ETag != newEntity._ETag)
{
throw new EntityTagMismatchException("Entity tags mismatch.");
}
}
}
public void Get(string requestUri, IEntityWithETag e)
{
Get(requestUri, e != null ? new EntityTagHeaderValue($"\"{e?._ETag}\"") : null);
}
