interface http-client {
    /// An HTTP request.
    record http-request {
        /// The URL to which the request should be made.
        url: string,
    }

    /// An HTTP response.
    record http-response {
        /// The response body.
        body: string,
    }

    /// Performs an HTTP request and returns the response.
    fetch: func(req: http-request) -> result<http-response, string>;
}