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gaddy

A minimal async HTTP server built from scratch in Rust, written to understand how things work at the wire level — no frameworks, no middleware, just TCP sockets and bytes.

Built in phases. Each phase adds one concept.

Phases

Phase 1 — TCP + raw HTTP

Accept TCP connections and write a hand-crafted HTTP response string. Concepts: TCP listener, async runtime, HTTP structure.

Phase 2 — Basic Routing ← current

Parse the request line, extract the path, match routes. Concepts: request parsing, routing logic.

Routes

Method Path Response
GET / home + route list
GET /hello greeting
* * 404 Not Found

Run

cargo run
curl http://localhost:7878/
curl http://localhost:7878/hello
curl http://localhost:7878/nope   # → 404

Project layout

src/
  main.rs       # boots the tokio runtime
  server.rs     # TCP listener loop, spawns tasks per connection
  handler.rs    # parses requests, matches routes
  response.rs   # builds raw HTTP/1.1 response bytes

Stack

  • tokio — async runtime