// gumdrone: Order chewing gum from a website
//
// This program is free software: you can redistribute it and/or modify it
// under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, version 3.
use std::io::prelude::*;
const ORDERS_FILE: &str = "/var/lib/gumdrone/orders";
const ORDER_PAGE: &str = "
Order!
Order Gum!
";
fn prompt_for_order(_: &cgi::Request) -> Result {
Ok(cgi::html_response(200, ORDER_PAGE))
}
fn write_order(order: &[u8]) -> std::io::Result<()> {
let datum = [order, b"\n"].concat();
let ofile = std::fs::File::options()
.append(true)
.create(true)
.open(ORDERS_FILE)?;
let mut vlock = fd_lock::RwLock::new(ofile);
vlock.write()?.write_all(&datum)?;
Ok(())
}
fn record_order(request: &cgi::Request) -> Result {
let body = request.body();
write_order(body).map_err(|_| cgi::text_response(503, "Couldn't record order"))?;
Ok(cgi::text_response(200, "Order recorded"))
}
fn strip_body(mut response: cgi::Response) -> cgi::Response {
response.body_mut().clear();
response
}
fn respond(request: &cgi::Request) -> Result {
match *request.method() {
cgi::http::Method::HEAD => prompt_for_order(request).map(strip_body),
cgi::http::Method::GET => prompt_for_order(request),
cgi::http::Method::POST => record_order(request),
_ => Err(cgi::text_response(405, "Huh?")),
}
}
fn respond_or_report_error(request: cgi::Request) -> cgi::Response {
match respond(&request) {
Ok(result) => result,
Err(error) => error,
}
}
cgi::cgi_main! { respond_or_report_error }