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use std::{
pin::Pin,
task::{Context, Poll},
};
use tokio::{
fs::File,
io::{AsyncRead, AsyncSeekExt, ReadBuf, SeekFrom},
};
use crate::{error::ReadBodyError, FromRequest, Request, RequestBody};
#[cfg_attr(docsrs, doc(cfg(feature = "tempfile")))]
pub struct TempFile(File);
#[async_trait::async_trait]
impl<'a> FromRequest<'a> for TempFile {
type Error = ReadBodyError;
async fn from_request(_req: &'a Request, body: &mut RequestBody) -> Result<Self, Self::Error> {
let body = body.take()?;
let mut reader = body.into_async_read();
let mut file = tokio::fs::File::from_std(::libtempfile::tempfile()?);
tokio::io::copy(&mut reader, &mut file).await?;
file.seek(SeekFrom::Start(0)).await?;
Ok(Self(file))
}
}
impl AsyncRead for TempFile {
fn poll_read(
mut self: Pin<&mut Self>,
cx: &mut Context<'_>,
buf: &mut ReadBuf<'_>,
) -> Poll<std::io::Result<()>> {
Pin::new(&mut self.0).poll_read(cx, buf)
}
}
#[cfg(test)]
mod tests {
use tokio::io::AsyncReadExt;
use super::*;
use crate::{handler, Endpoint};
#[tokio::test]
async fn test_tempfile_extractor() {
#[handler(internal)]
async fn index123(mut file: TempFile) {
let mut s = String::new();
file.read_to_string(&mut s).await.unwrap();
assert_eq!(s, "abcdef");
}
index123.call(Request::builder().body("abcdef")).await;
}
}