Is it possible to build a FS that gets files from URLs?

[pexch]

Is it possible build a File System that will be able to get files from URLs? I did some playing around and noticed that it may be possible but it seems the cmd "RETR" would like the whole stream available from the get-go which is not efficient for large files that I would be downloading on the fly:

.then(() => Promise.try(() => this.fs.read(filePath, {start: this.restByteCount})))

So would you say that it is possible to do such a thing? And if so are there any examples or maybe ideas you can put forward to help me achieve this?