film2.0/src/__init__.py

#!/usr/bin/env python3

import os
import tomllib
from flask import Flask, render_template, send_file

with open("config.toml", "rb") as f:
    config = tomllib.load(f)

app = Flask(
    __name__,
    template_folder="../templates",
    static_folder="../static",
)

app.jinja_env.globals.update(
    config=config,
    path_join=os.path.join,
)

# Catch all


@app.route('/', defaults={'path': ''})
@app.route('/<path:path>')
def index(path):
    internal_path = os.path.join(config['base_path'], path)
    path = '/' + path

    # Checks ###################################################

    if '..' in path:
        return 'Path cannot contain double dots, i.e. "..".'

    if not os.path.exists(internal_path):
        return (
            render_template(
                "error.html",
                code=404,
                msg=f'The path "{path}" does not exist.',
            ),
            404,
        )

    # Actual serving ###########################################

    if os.path.isdir(internal_path):
        _, dirs, files = next(os.walk(internal_path))
        files = filter(lambda x: not x.endswith(".php"), files)
        files = filter(lambda x: not x.startswith("."), files)
        dirs = filter(lambda x: not x.startswith("."), dirs)

        return (
            render_template(
                "directory.html",
                path=path,
                dirs=dirs,
                files=files,
            ),
            200,
        )

    # Path exists, not a folder, must be a file, send
    return send_file(internal_path)