71 lines
2.3 KiB
Rust
71 lines
2.3 KiB
Rust
use futures_util::TryStreamExt;
|
|
use time::OffsetDateTime;
|
|
use sqlx::{postgres::PgPool, Row};
|
|
use std::cmp::max;
|
|
use std::path::{Path, PathBuf};
|
|
use time::ext::NumericalStdDuration;
|
|
use tokio::fs;
|
|
use tokio::sync::mpsc::Receiver;
|
|
use tokio::time::timeout;
|
|
|
|
pub(crate) async fn delete_old_files(mut receiver: Receiver<()>, db: PgPool, files_dir: PathBuf) {
|
|
loop {
|
|
wait_for_file_expiry(&mut receiver, &db).await;
|
|
|
|
let now = OffsetDateTime::now_utc();
|
|
let mut rows = sqlx::query("SELECT file_id FROM files WHERE files.valid_till < $1")
|
|
.bind(now)
|
|
.fetch(&db);
|
|
while let Some(row) = rows.try_next().await.expect("could not load expired files") {
|
|
let file_id: String = row.try_get("file_id").expect("we selected this column");
|
|
delete_content(&file_id, &files_dir)
|
|
.await
|
|
.expect("could not delete file");
|
|
}
|
|
|
|
sqlx::query("DELETE FROM files WHERE valid_till < $1")
|
|
.bind(now)
|
|
.execute(&db)
|
|
.await
|
|
.expect("could not delete expired files from database");
|
|
}
|
|
}
|
|
|
|
pub(crate) async fn delete_by_id(
|
|
db: &PgPool,
|
|
file_id: &str,
|
|
files_dir: &Path,
|
|
) -> Result<(), sqlx::Error> {
|
|
delete_content(file_id, files_dir).await?;
|
|
sqlx::query("DELETE FROM files WHERE file_id = $1")
|
|
.bind(file_id)
|
|
.execute(db)
|
|
.await?;
|
|
Ok(())
|
|
}
|
|
|
|
async fn delete_content(file_id: &str, files_dir: &Path) -> Result<(), std::io::Error> {
|
|
let path = files_dir.join(file_id);
|
|
if fs::remove_file(&path).await.is_ok() {
|
|
log::info!("delete file {}", file_id);
|
|
}
|
|
Ok(())
|
|
}
|
|
|
|
async fn wait_for_file_expiry(receiver: &mut Receiver<()>, db: &PgPool) {
|
|
let valid_till: (Option<OffsetDateTime>,) =
|
|
sqlx::query_as("SELECT MIN(valid_till) as min from files")
|
|
.fetch_one(db)
|
|
.await
|
|
.expect("could not fetch expiring files from database");
|
|
let next_timeout: std::time::Duration = match valid_till.0 {
|
|
Some(valid_till) => (max(
|
|
0,
|
|
valid_till.unix_timestamp() - OffsetDateTime::now_utc().unix_timestamp(),
|
|
) as u64)
|
|
.std_seconds(),
|
|
None => 1_u64.std_days(),
|
|
};
|
|
let _ = timeout(next_timeout, receiver.recv()).await;
|
|
}
|