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use crate::prelude::*;
use std::io::Write as _;
#[derive(Clone)]
pub struct DiskSession;
impl DiskSession {
fn file_for_id(
&self,
identifier: &gotham::middleware::session::SessionIdentifier,
should_exist: bool,
) -> Option<std::path::PathBuf> {
let name = format!("web-{}", identifier.value);
crate::dirs::Dirs::new().data_file(&name, should_exist)
}
}
impl gotham::middleware::session::NewBackend for DiskSession {
type Instance = Self;
fn new_backend(&self) -> std::io::Result<Self::Instance> {
Ok(Self)
}
}
impl gotham::middleware::session::Backend for DiskSession {
fn persist_session(
&self,
identifier: gotham::middleware::session::SessionIdentifier,
content: &[u8],
) -> std::result::Result<(), gotham::middleware::session::SessionError>
{
let filename = self.file_for_id(&identifier, false).unwrap();
let mut file = std::fs::File::create(filename).map_err(|e| {
gotham::middleware::session::SessionError::Backend(format!(
"{}",
e
))
})?;
file.write_all(content).map_err(|e| {
gotham::middleware::session::SessionError::Backend(format!(
"{}",
e
))
})?;
file.sync_all().map_err(|e| {
gotham::middleware::session::SessionError::Backend(format!(
"{}",
e
))
})?;
Ok(())
}
fn read_session(
&self,
identifier: gotham::middleware::session::SessionIdentifier,
) -> Box<
dyn futures::Future<
Item = Option<Vec<u8>>,
Error = gotham::middleware::session::SessionError,
> + Send,
> {
if let Some(filename) = self.file_for_id(&identifier, true) {
Box::new(
tokio::fs::File::open(filename)
.and_then(|file| {
let buf = vec![];
tokio::io::read_to_end(file, buf)
})
.map(|(_, v)| Some(v))
.map_err(|e| {
gotham::middleware::session::SessionError::Backend(
format!("{}", e),
)
}),
)
} else {
Box::new(futures::future::ok(None))
}
}
fn drop_session(
&self,
identifier: gotham::middleware::session::SessionIdentifier,
) -> std::result::Result<(), gotham::middleware::session::SessionError>
{
if let Some(filename) = self.file_for_id(&identifier, true) {
std::fs::remove_file(filename).map_err(|e| {
gotham::middleware::session::SessionError::Backend(format!(
"{}",
e
))
})?;
}
Ok(())
}
}
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