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use tokio::fs::File;
use std::{collections::HashSet, path::PathBuf, str::from_utf8};
use crate::local_infile_handler::LocalInfileHandler;
#[derive(Clone, Debug)]
pub struct WhiteListFsLocalInfileHandler {
white_list: HashSet<PathBuf>,
}
impl WhiteListFsLocalInfileHandler {
pub fn new<A, B>(white_list: B) -> WhiteListFsLocalInfileHandler
where
A: Into<PathBuf>,
B: IntoIterator<Item = A>,
{
let mut white_list_set = HashSet::new();
for path in white_list.into_iter() {
white_list_set.insert(Into::<PathBuf>::into(path));
}
WhiteListFsLocalInfileHandler {
white_list: white_list_set,
}
}
}
impl LocalInfileHandler for WhiteListFsLocalInfileHandler {
fn handle(&self, file_name: &[u8]) -> super::InfileHandlerFuture {
let path: PathBuf = match from_utf8(file_name) {
Ok(path_str) => path_str.into(),
Err(_) => return Box::pin(futures_util::future::err("Invalid file name".into())),
};
if !self.white_list.contains(&path) {
let err_msg = format!("Path `{}' is not in white list", path.display());
return Box::pin(futures_util::future::err(err_msg.into()));
}
Box::pin(async move { Ok(Box::new(File::open(path.to_owned()).await?) as Box<_>) })
}
}