Simple HTTP Server

Build a basic HTTP server with Nanyx using the http package.

Setup

nanyx new my_server
cd my_server
nanyx install nanyx.http

The code

module main

import nanyx.http/server

def handler: Request -> Response = { req ->
  match req.path
    | "/" -> Response.text(200, "Welcome to Nanyx!")
    | #Path('/hello/{name}')(name) -> Response.text(200, "Hello, {name}!")
    | _ -> Response.text(404, "Not Found")
}

@entry
def main = {
  println("Server running on http://localhost:3000")
  server.start(handler, port = 3000)
}

The route template is written as a single-quoted (raw) string so that its {name} placeholder is passed to the #Path pattern as-is rather than being interpolated. #Path is a custom pattern with arguments: the template goes in the first parenthesis group, and the captured parameters are bound by the second.

Run it

nanyx run
# Server running on http://localhost:3000

Key concepts

• Pattern matching on routes — clean, readable routing without a framework
• Custom patterns — extract path parameters with a #Path template pattern
• Immutable request/response — functional approach to HTTP handling