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datatrash/src/config.rs

93 lines
2.8 KiB

use std::env;
use std::path::PathBuf;
use std::str::FromStr;
use time::ext::NumericalDuration;
use time::Duration;
use tokio::fs;
#[derive(Clone)]
pub struct Config {
pub static_dir: PathBuf,
pub files_dir: PathBuf,
pub max_file_size: Option<u64>,
pub no_auth_limits: Option<NoAuthLimits>,
pub enable_rate_limit: bool,
pub proxied: bool,
pub rate_limit_replenish_seconds: u64,
pub rate_limit_burst: u32,
}
#[derive(Clone)]
pub struct NoAuthLimits {
pub auth_password: String,
pub max_time: Duration,
pub large_file_max_time: Duration,
pub large_file_size: u64,
}
pub async fn from_env() -> Config {
let max_file_size = env::var("UPLOAD_MAX_BYTES")
.ok()
.and_then(|variable| variable.parse().ok())
.or(Some(8 * 1024 * 1024))
.filter(|&max_file_size| max_file_size != 0);
let static_dir =
PathBuf::from(env::var("STATIC_DIR").unwrap_or_else(|_| "./static".to_owned()));
let files_dir = PathBuf::from(env::var("FILES_DIR").unwrap_or_else(|_| "./files".to_owned()));
fs::create_dir_all(&files_dir)
.await
.expect("could not create directory for storing files");
let no_auth_limits = get_no_auth_limits();
// default to 480requests/8h
let enable_rate_limit = matches!(env::var("RATE_LIMIT").as_deref(), Ok("true") | Err(_));
let proxied = env::var("RATE_LIMIT_PROXIED").as_deref() == Ok("true");
let rate_limit_replenish_seconds = env::var("RATE_LIMIT_REPLENISH_SECONDS")
.ok()
.and_then(|rate_limit| rate_limit.parse().ok())
.unwrap_or(60);
let rate_limit_burst = env::var("RATE_LIMIT_BURST")
.ok()
.and_then(|burst| burst.parse().ok())
.unwrap_or(480);
Config {
static_dir,
files_dir,
max_file_size,
no_auth_limits,
enable_rate_limit,
proxied,
rate_limit_replenish_seconds,
rate_limit_burst,
}
}
fn get_no_auth_limits() -> Option<NoAuthLimits> {
match (
env::var("AUTH_PASSWORD").ok(),
env_number::<i64>("NO_AUTH_MAX_TIME"),
env_number::<i64>("NO_AUTH_LARGE_FILE_MAX_TIME"),
env_number("NO_AUTH_LARGE_FILE_SIZE"),
) {
(Some(auth_password), Some(max_time), Some(large_file_max_time), Some(large_file_size)) => {
Some(NoAuthLimits {
auth_password,
max_time: max_time.seconds(),
large_file_max_time: large_file_max_time.seconds(),
large_file_size,
})
}
(None, None, None, None) => None,
_ => {
panic!("Incomplete NO_AUTH configuration: All environment variables must be specified")
}
}
}
fn env_number<T: FromStr>(variable: &str) -> Option<T> {
env::var(variable).ok().and_then(|n| n.parse::<T>().ok())
}