Protohackers in Elixir: day 5 - Mob in the Middle

Andrea Leopardi builds a man-in-the-middle proxy server in Elixir to intercept and modify chat traffic for the Protohackers challenge.

This is the sixth video of my "Protohackers" Elixir series. We're solving network challenges from protohackers.com. I’m deploying code using a free account on fly.io. The source code is on GitHub: github.com/whatyouhide/protohackers_in_elixir Some resources for this video: • The description of the Protohackers problem we're working through in this video: protohackers.com/problem/5 • The description of the Protohackers "Budget Chat" problem from two videos ago: protohackers.com/problem/3 • Deploying Elixir applications on Fly.io: fly.io/docs/elixir/getting-started/legacy • Documentation for the Erlang gen_tcp module: erlang.org/doc/man/gen_tcp.html Other resources: • My website: andrealeopardi.com • Twitter: twitter.com/whatyouhide • Mastodon: mas.to/@whatyouhide • #Elixir's website: elixir-lang.org Music from Uppbeat (free for Creators!): uppbeat.io/t/prigida/leaf-counter License code: BROSVTYPHPKBHUSL Chapters: 00:00 Intro 00:33 Protohackers problem description 02:06 Network architecture 02:42 OTP architecture and active sockets 09:48 Writing some code 30:49 Proxying and rewriting addresses 41:48 Deploy and test 42:35 Conclusion