Constraint and limitation
Coding restriction
Bucket name, object key, meta, ACL, etc. only supports UTF-8 encoding
The URL to access the resource should be encoded by rawurlencode
Object key needs to be encoded by rawurlencode except "/"
Naming rule
The name of bucket and object in API shall comply with the following rules:
Bucket name:
It is unique in cloud storage
It is composed of the lowercase letter, the number and the character "-" and the length should be from 6 to 63 digits;
Cannot start with the number and the character '-'；
Cannot start or end with '-'；
Or use the domain name, such as xxx.foo.com.cn, which is convenient for binding your domain name
Object name:
The length of the key cannot exceed 512 bytes；
The key excepts "/" should be encoded by rawurlencode