app.py

def application(environ, start_response):
    """
    WSGI application callable.
    """
    # Configurar o status HTTP e os headers
    status = '200 OK'
    headers = [('Content-Type', 'text/plain')]

    # Iniciar a resposta
    start_response(status, headers)

    # Retornar o corpo da resposta
    return [b"Hello, WSGI World!"]


# Executando o servidor WSGI embutido no Python
if __name__ == "__main__":
    from wsgiref.simple_server import make_server

    # Cria o servidor na porta 8000
    port = 8000
    print(f"Serving on http://localhost:{port}")
    with make_server('', port, application) as server:
        server.serve_forever()