pict-rs/src/tmp_file.rs
2021-10-23 14:14:12 -05:00

58 lines
1.4 KiB
Rust

use once_cell::sync::Lazy;
use std::path::PathBuf;
use tokio::io::AsyncRead;
use uuid::Uuid;
static TMP_DIR: Lazy<PathBuf> = Lazy::new(|| {
let dir = std::env::temp_dir().join(Uuid::new_v4().to_string());
std::fs::create_dir(&dir).unwrap();
dir
});
struct TmpFile(PathBuf);
impl Drop for TmpFile {
fn drop(&mut self) {
actix_rt::spawn(tokio::fs::remove_file(self.0.clone()));
}
}
pin_project_lite::pin_project! {
pub(crate) struct TmpFileCleanup<R> {
#[pin]
inner: R,
file: TmpFile,
}
}
pub(crate) fn tmp_file(ext: Option<&str>) -> PathBuf {
if let Some(ext) = ext {
TMP_DIR.join(format!("{}{}", Uuid::new_v4(), ext))
} else {
TMP_DIR.join(Uuid::new_v4().to_string())
}
}
pub(crate) async fn remove_tmp_dir() -> std::io::Result<()> {
tokio::fs::remove_dir_all(&*TMP_DIR).await
}
pub(crate) fn cleanup_tmpfile<R: AsyncRead>(reader: R, file: PathBuf) -> TmpFileCleanup<R> {
TmpFileCleanup {
inner: reader,
file: TmpFile(file),
}
}
impl<R: AsyncRead> AsyncRead for TmpFileCleanup<R> {
fn poll_read(
mut self: std::pin::Pin<&mut Self>,
cx: &mut std::task::Context<'_>,
buf: &mut tokio::io::ReadBuf<'_>,
) -> std::task::Poll<std::io::Result<()>> {
let this = self.as_mut().project();
this.inner.poll_read(cx, buf)
}
}