Url Shortener Service with Go
Design and implement URL-shortener service.
Functional requirements:
- Given a URL, generate a shorter and unique alias (short link)
- When users access a short link, redirect to the original link
- Users should optionally be able to pick a custom short link for their URL
- Links will expire after a standard default timespan. Users should also be able to specify the expiration time
Non-functional Requirements:
- Integrate cache like Redis or Memcached for storing the data
- Shortened links should not be guessable (not predictable)
