Merge the result's CommonPrefixes array to get all folders when the result is truncated.
The truncated result may not contains exactly 1000 elements due to the prefixes. IsTruncated flag is used insted of element count.
Also reduce requests when querying files without recursive flag.
Merge the result's CommonPrefixes array to get all folders when the result is truncated. The truncated result may not contains exactly 1000 elements due to the prefixes. IsTruncated flag is used insted of element count.
Also reduce requests when querying files without recursive flag.