将输入标识为本地文件夹或 s3 存储桶

Question

Source could be local folder or s3 bucket. How we can make input parameter to identify entered parameter as local folder or s3 bucket?

Answer 1

s3 bucket is accessed using path style mentioned here: https://docs.aws.amazon.com/AmazonS3/latest/dev/UsingBucket.html You should write pattern check on your input to identify if the input is s3 bucket or bucket object.

Other way, if your input for local path is always going to exists on the system, then you can run path canonicalization commands and get absolute path of the local folder. eg on Unix you can run realpath() system api. http://man7.org/linux/man-pages/man3/realpath.3.html

realpath() api will resolve to actual path only when the input path exists otherwise it returns the error. You can send your input to realpath command, if it passes, it is your local path on the system.