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@ -1,172 +1,59 @@ |
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use json_dotpath::DotPaths; |
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use parking_lot::RwLock; |
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use rand::Rng; |
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use rocket::fairing::{self, Fairing, Info}; |
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use rocket::request::FromRequest; |
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use rocket::{ |
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http::{Cookie, Status}, |
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Outcome, Request, Response, Rocket, State, |
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}; |
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use serde_json::Value; |
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use serde::de::DeserializeOwned; |
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use serde::Serialize; |
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use serde_json::{Map, Value}; |
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use std::collections::HashMap; |
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use std::time::{Instant, Duration}; |
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use std::ops::Add; |
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use json_dotpath::DotPaths; |
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const SESSION_ID: &'static str = "SESSID"; |
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pub type Session<'a> = rocket_session::Session<'a, serde_json::Map<String, Value>>; |
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type SessionsMap = HashMap<String, SessionInstance>; |
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pub trait SessionAccess { |
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fn get<T: DeserializeOwned>(&self, path: &str) -> Option<T>; |
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#[derive(Debug)] |
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struct SessionInstance { |
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data: serde_json::Map<String, Value>, |
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expires: Instant, |
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} |
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fn get_or<T: DeserializeOwned>(&self, path: &str, def: T) -> T; |
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#[derive(Default, Debug)] |
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pub struct SessionStore { |
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inner: RwLock<SessionsMap>, |
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lifespan: Duration, |
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} |
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fn get_or_else<T: DeserializeOwned, F: FnOnce() -> T>(&self, path: &str, def: F) -> T; |
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#[derive(PartialEq, Hash, Clone, Debug)] |
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pub struct SessionID(String); |
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impl<'a, 'r> FromRequest<'a, 'r> for &'a SessionID { |
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type Error = (); |
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fn from_request(request: &'a Request<'r>) -> Outcome<Self, (Status, Self::Error), ()> { |
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Outcome::Success(request.local_cache(|| { |
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println!("get id"); |
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if let Some(cookie) = request.cookies().get(SESSION_ID) { |
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println!("from cookie"); |
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SessionID(cookie.value().to_string()) // FIXME avoid cloning
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} else { |
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println!("new id"); |
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SessionID( |
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rand::thread_rng() |
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.sample_iter(&rand::distributions::Alphanumeric) |
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.take(16) |
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.collect(), |
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) |
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} |
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})) |
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} |
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} |
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fn get_or_default<T: DeserializeOwned + Default>(&self, path: &str) -> T; |
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#[derive(Debug)] |
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pub struct Session<'a> { |
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store: State<'a, SessionStore>, |
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id: &'a SessionID, |
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} |
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impl<'a, 'r> FromRequest<'a, 'r> for Session<'a> { |
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type Error = (); |
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fn from_request(request: &'a Request<'r>) -> Outcome<Self, (Status, Self::Error), ()> { |
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Outcome::Success(Session { |
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id: request.local_cache(|| { |
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if let Some(cookie) = request.cookies().get(SESSION_ID) { |
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SessionID(cookie.value().to_string()) |
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} else { |
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SessionID( |
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rand::thread_rng() |
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.sample_iter(&rand::distributions::Alphanumeric) |
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.take(16) |
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.collect(), |
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) |
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} |
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}), |
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store: request.guard().unwrap(), |
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}) |
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} |
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} |
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impl<'a> Session<'a> { |
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pub fn fairing() -> impl Fairing { |
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SessionFairing |
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} |
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fn take<T: DeserializeOwned>(&self, path: &str) -> Option<T>; |
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fn tap<T>(&self, func : impl FnOnce(&mut serde_json::Map<String, Value>) -> T) -> T { |
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let mut wg = self.store.inner.write(); |
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if let Some(instance) = wg.get_mut(&self.id.0) { |
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instance.expires = Instant::now().add(self.store.lifespan); |
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func(&mut instance.data) |
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} else { |
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let mut data = Map::new(); |
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let rv = func(&mut data); |
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wg.insert(self.id.0.clone(), SessionInstance { |
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data: data, |
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expires: Instant::now().add(self.store.lifespan), |
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}); |
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rv |
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} |
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} |
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fn replace<O: DeserializeOwned, N: Serialize>(&self, path: &str, new: N) -> Option<O>; |
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pub fn renew(&self) { |
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self.tap(|_| ()) |
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} |
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fn set<T: Serialize>(&self, path: &str, value: T); |
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pub fn reset(&self) { |
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self.tap(|data| data.clear()) |
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} |
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fn remove(&self, path: &str) -> bool; |
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} |
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pub fn get<T: DeserializeOwned>(&self, path: &str) -> Option<T> { |
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impl<'a> SessionAccess for Session<'a> { |
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fn get<T: DeserializeOwned>(&self, path: &str) -> Option<T> { |
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self.tap(|data| data.dot_get(path)) |
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} |
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pub fn get_or<T: DeserializeOwned>(&self, path: &str, def: T) -> T { |
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fn get_or<T: DeserializeOwned>(&self, path: &str, def: T) -> T { |
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self.get(path).unwrap_or(def) |
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} |
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pub fn get_or_else<T: DeserializeOwned, F: FnOnce() -> T>(&self, path: &str, def: F) -> T { |
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fn get_or_else<T: DeserializeOwned, F: FnOnce() -> T>(&self, path: &str, def: F) -> T { |
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self.get(path).unwrap_or_else(def) |
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} |
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pub fn get_or_default<T: DeserializeOwned + Default>(&self, path: &str) -> T { |
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fn get_or_default<T: DeserializeOwned + Default>(&self, path: &str) -> T { |
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self.get(path).unwrap_or_default() |
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} |
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pub fn take<T: DeserializeOwned>(&self, path: &str) -> Option<T> { |
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fn take<T: DeserializeOwned>(&self, path: &str) -> Option<T> { |
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self.tap(|data| data.dot_take(path)) |
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} |
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pub fn replace<O: DeserializeOwned, N: Serialize>(&self, path: &str, new: N) -> Option<O> { |
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fn replace<O: DeserializeOwned, N: Serialize>(&self, path: &str, new: N) -> Option<O> { |
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self.tap(|data| data.dot_replace(path, new)) |
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} |
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pub fn set<T: Serialize>(&self, path: &str, value: T) { |
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fn set<T: Serialize>(&self, path: &str, value: T) { |
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self.tap(|data| data.dot_set(path, value)); |
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} |
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pub fn remove(&self, path: &str) -> bool { |
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fn remove(&self, path: &str) -> bool { |
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self.tap(|data| data.dot_remove(path)) |
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} |
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} |
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/// Fairing struct
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struct SessionFairing; |
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impl Fairing for SessionFairing { |
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fn info(&self) -> Info { |
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Info { |
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name: "Session Fairing", |
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kind: fairing::Kind::Attach | fairing::Kind::Response, |
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} |
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} |
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fn on_attach(&self, rocket: Rocket) -> Result<Rocket, Rocket> { |
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Ok(rocket.manage(SessionStore::default())) |
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} |
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fn on_response<'r>(&self, request: &'r Request, response: &mut Response) { |
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let session = request.local_cache(|| SessionID("".to_string())); |
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if !session.0.is_empty() { |
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response.adjoin_header(Cookie::build(SESSION_ID, session.0.clone()).finish()); |
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} |
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} |
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} |
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