Trials of Ares · Learn system design by building it

⛨Trials of Ares

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The Labyrinth of Links

The Armorydrag onto the field · tap to summon

Gates & Roads

Warriors

Messengers

Treasuries

Hover a piece to learn what it does. Embers mark pieces this trial calls for.

The Battlefield 0 pieces · 0 arrows

The Labyrinth of Links

Design a URL shortener

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I. The Oath of the Short Link

Create and redirect

The demands

POST /urls takes a long URL and returns a 7 character code
GET /{code} redirects to the original URL
100M new links per month, kept for 5 years
Reads outnumber writes about 100 to 1

Objectives

Users can reach a server that handles their requests +30
The server stores the code to URL mapping somewhere durable +35
A request can travel all the way from users to storage +25
Bonus: no stray pieces left unconnected +10