Bug: 403 on creating stage without a trailing slash

[flaneur2020]

Summary
SQL:

CREATE STAGE tpch100_data url='oss://wubx-bj01/data/tpch100_single_gz' 
  connection = (
        ENDPOINT_URL = 'https://oss-cn-beijing-internal.aliyuncs.com'
        ACCESS_KEY_ID = '---'
        ACCESS_KEY_SECRET = '--'
  );
list @tpch100_data/; -- 403

however replace the url with 'CREATE STAGE tpch100_data url='oss://wubx-bj01/data/tpch100_single_gz/', the 403 could be fixed.

[Xuanwo]

There are two problems here:

• Create stage with a path not ends with / should be disallowed
• Visiting this path should not be 403