#!/usr/bin/env python3

"""

HTTP server for hosting Adventure Land code.

This can be used as an alternative to always running VSCode.

"""

import argparse

import logging

from pathlib import Path, PurePosixPath

from aiohttp import web

DEFAULT_HOST = '127.0.0.1'

DEFAULT_PORT = 5500

ALLOWED_ORIGIN = 'https://adventure.land'

BASE_DIR = (Path(__file__) / '..' / '..').resolve()

SOURCE_DIR = BASE_DIR / 'src'

routes = web.RouteTableDef()

@routes.get('/{path:.*}')

def static(request: web.Request) -> web.FileResponse:

path = PurePosixPath(request.match_info['path'])

try:

full_path = (SOURCE_DIR / path).resolve(strict=True)

# Path must be under source directory

path = full_path.relative_to(SOURCE_DIR)

except ValueError as e:

logging.warning('Bad request: %s', e)

raise web.HTTPBadRequest()

except FileNotFoundError:

raise web.HTTPNotFound()

headers = {

'Access-Control-Allow-Origin': ALLOWED_ORIGIN,

'Cache-Control': 'no-cache', # Always

}

return web.FileResponse(full_path, headers=headers)

def parse_args() -> argparse.Namespace:

"""Parse command-line arguments."""

parser = argparse.ArgumentParser()

parser.add_argument('--host', default=DEFAULT_HOST)

parser.add_argument('--port', default=DEFAULT_PORT)

return parser.parse_args()

def main():

logging.basicConfig(level=logging.INFO)

args = parse_args()

app = web.Application()

app.add_routes(routes)

web.run_app(app, host=args.host, port=args.port)

if __name__ == '__main__':

main()