A simple HTTP server example using the fasthttp module from vlib/fasthttp.

• Handles GET and POST requests
• Routes requests to different controllers based on HTTP method and path
• Returns appropriate HTTP responses with status codes and content

./v examples/fasthttp

./examples/fasthttp/fasthttp

The server will listen on http://localhost:3000

curl http://localhost:3000/

curl http://localhost:3000/user/123

curl -X POST http://localhost:3000/user

curl http://localhost:3000/notfound

• main.v - Entry point and request router
• controllers.v - Request handlers for different routes
• v.mod - Module metadata

The example demonstrates:

1. Request Routing: the handle() append handler routes incoming HTTP requests based on method and path
2. Response Handling: controllers append the raw HTTP response (headers + body) into the connection's reused out buffer and the handler returns .done
3. Zero-copy: no per-request response object is allocated; responses go straight into the server's reused, pipelining-batched write buffer

The fasthttp module handles:

• Low-level socket management
• Request parsing
• Connection handling
• Non-blocking I/O with epoll (Linux) or kqueue (macOS)