datatrash/src/config.rs

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use std::env;
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use std::path::PathBuf;
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use time::Duration;
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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>,
}
#[derive(Clone)]
pub struct NoAuthLimits {
pub auth_password: String,
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pub max_time: Duration,
pub large_file_max_time: Duration,
pub large_file_size: u64,
}
pub async fn get_config() -> Config {
let max_file_size = env::var("UPLOAD_MAX_BYTES")
.ok()
.and_then(|variable| variable.parse().ok())
.unwrap_or(8 * 1024 * 1024);
let max_file_size = (max_file_size != 0).then(|| max_file_size);
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");
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let no_auth_limits = get_no_auth_limits();
Config {
static_dir,
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files_dir,
max_file_size,
no_auth_limits,
}
}
fn get_no_auth_limits() -> Option<NoAuthLimits> {
match (
env::var("AUTH_PASSWORD").ok(),
env_number("NO_AUTH_MAX_TIME"),
env_number("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,
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max_time: Duration::seconds(max_time as i64),
large_file_max_time: Duration::seconds(large_file_max_time as i64),
large_file_size,
})
}
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(None, None, None, None) => None,
_ => {
panic!("Incomplete NO_AUTH configuration: All environment variables must be specified")
}
}
}
fn env_number(variable: &str) -> Option<u64> {
env::var(variable).ok().and_then(|n| n.parse::<u64>().ok())
}