Being able to retrieve the absolute path of file within a file hierarchy whose root is a given folder path.
For example, I want to find a file named result.json with /tmp/lost root folder.
- The folder doesn't exist, return an error to the user.
- The file doesn't exist under the given root folder, return an error to the user.
- The file exists under the given root, return the absolute path, file included, ie /tmp/lost/really/really/lost/result.json
- If many files exists under the given root folder, return a list of files order by path shortness, the shortest path must be the first in the list.
You have to expose an API with Spring boot.
The file system is not necessarily a FS on the computer but could be an AWS S3.
Security can be added in a next step so not every users would be able to access to this API.