Why is there this JWTS

In a certain company, due to the previous integration of OSS direct transmission, but when migrating to Google, the direct transmission function was not found yet. Therefore, we decided to write our own interface to provide the client with direct transmission

Method List

BuildToken(aud, disk, bucket string) (*TokenResponse, error)
ParseToken(token string) (*FlysystemClaims, error)
WithTokenUploadMultipart(fs *flysystem.Flysystem, token, fileName string, file *multipart.FileHeader) (*Response, error) 
WithTokenUploadReader(fs *flysystem.Flysystem, token, fileName string, reader io.Reader) (*Response, error)
WithTokenUploadFilePath(fs *flysystem.Flysystem, token, fileName, filePath string) (*Response, error)
WithTokenUploadBase64(fs *flysystem.Flysystem, token, fileName, base64 string) (*Response, error)
WithTokenDelete(fs *flysystem.Flysystem, token, fileName string) (*Response, error)
Delete(fs *flysystem.Flysystem, disk, bucket, fileName string) (*Response, error) 
UploadBase64(fs *flysystem.Flysystem, disk, bucket, fileName, base64Str string) (*Response, error)
UploadReader(fs *flysystem.Flysystem, disk, bucket, fileName string, reader io.Reader) (*Response, error)
UploadByte(fs *flysystem.Flysystem, disk, bucket, fileName string, contents []byte) (*Response, error) 

Code message

code	Message
203	Token is empty
403	Token parsing failed
411	file.Open()
305	Driver not found
204	Write error
412	Base64 parsing failed
404	gfs.Delete err