[ARROW-10222] [C++] Add FileSystem::MakeUri() to serialize file locations to URIs

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 1.0.1
• Component/s: C++
• External issue URL: https://github.com/apache/arrow/issues/18316
• Assignee: Unassigned
• Reporter: Ben Kietzman
• Created: 07/Oct/20 20:18
• Updated: 11/Jan/23 08:11

Description

Making the transform FS -> URI bijective would greatly simplify unambiguous location of files and serialization of filesystems. Something like:

Result<std::string> FileSystem::MakeUri(std::string path = "/");

Difficulties:

• SubTreeFileSystem::MakeUri("/") would probably return a URI referring to its base directory in the wrapped filesystem, which wouldn't roundtrip to a SubTreeFileSystem with FileSystemFromUri
• Not all of s3's parameters are supported in a URI