Compile crashes

Fortune for datse's current commit: Half blessing − 半吉

src/main.rs

@@ -1,5 +1,6 @@
 #![cfg_attr(nightly, feature(never_type))]
 #![feature(entry_insert)]
+#![feature(type_alias_impl_trait)]
 
 #![allow(dead_code)]
 #![allow(unused_imports)]

src/server/web/ban.rs

@@ -0,0 +1,128 @@
+//! Banning
+use std::sync::{
+    Arc,
+    Weak,
+};
+use std::{fmt, error};
+use std::collections::BTreeSet;
+use std::cmp::{PartialOrd, Ordering};
+use tokio::sync::RwLock;
+use std::net::IpAddr;
+use std::iter::FromIterator;
+
+use super::*;
+
+use source::ClientInfo;
+
+#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub enum BanKind
+{
+    IP(IpAddr),
+}
+
+impl PartialEq<ClientInfo> for BanKind
+{
+    fn eq(&self, other: &ClientInfo) -> bool
+    {
+	match self {
+	    Self::IP(addr) => addr == &other.ip_addr,
+	}
+    }
+}
+
+impl PartialOrd<ClientInfo> for BanKind
+{
+    #[inline] fn partial_cmp(&self, other: &ClientInfo) -> Option<Ordering> {
+	match self {
+	    Self::IP(addr) => addr.partial_cmp(&other.ip_addr),
+	}
+    }
+}
+
+impl ClientInfo
+{
+    /// Ban this client IP
+    #[inline] pub fn ban_ip(&self) -> BanKind
+    {
+	BanKind::IP(self.ip_addr.clone())
+    }
+}
+
+
+#[derive(Debug, Clone)]
+pub struct Banlist(Arc<RwLock<BTreeSet<BanKind>>>);
+
+type OpaqueFuture<'a, T> = impl Future<Output = T> + 'a;
+
+impl Banlist
+{
+    /// Create a new, empty banlist.
+    ///
+    /// To create one from a list of bans, this type implements `FromIterator`.
+    pub fn new() -> Self
+    {
+	Self(Arc::new(RwLock::new(BTreeSet::new())))
+    }
+
+    /// Add a ban to the list and wait for it to complete.
+    pub async fn add_ban_inline(&self, ban: BanKind) -> bool
+    {
+	self.0.write().await.insert(ban)
+    }
+    
+    /// Add a ban to the list.
+    ///
+    /// If the list is being used, this operation is deferred until it is able to complete. A future is returned to allow you to wait until the operation completes (it is a background task.)
+    pub fn add_ban(&self, ban: BanKind) -> impl Future<Output = bool>
+    {
+	let col = self.0.clone();
+	tokio::spawn(async move {
+	    col.write().await.insert(ban)
+	}).map(|x| x.unwrap())
+    }
+    
+    /// Create a warp filter that disallows hosts on the list.
+    ///
+    /// # Lifetime
+    /// The filter holds a weak reference to this list. If the list is dropped, then the filter will panic.
+    pub fn filter(&self) -> impl Fn(ClientInfo) -> OpaqueFuture<'static, Result<ClientInfo, warp::reject::Rejection>> + Clone + 'static
+    {
+	let refer = Arc::downgrade(&self.0);
+	move |client_info: ClientInfo| {
+	    let refer = refer.upgrade().unwrap();
+	    async move {
+		let bans = refer.read().await;
+		//XXX: FUCK there has to be a better way to check this right?
+		for fuck in bans.iter()
+		{
+		    if fuck == &client_info {
+			return Err(warp::reject::custom(ClientBannedError));
+		    }
+		}
+		Ok(client_info)
+	    }
+	}
+    }
+}
+
+impl FromIterator<BanKind> for Banlist
+{
+    fn from_iter<I: IntoIterator<Item=BanKind>>(iter: I) -> Self
+    {
+	Self(Arc::new(RwLock::new(iter.into_iter().collect())))
+    }
+}
+
+/// Error returned from filter when the client is banned.
+#[derive(Debug)]
+pub struct ClientBannedError;
+
+impl warp::reject::Reject for ClientBannedError{}
+impl error::Error for ClientBannedError{}
+impl fmt::Display for ClientBannedError
+{
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
+    {
+	write!(f, "you are banned")
+    }
+}

src/server/web/mod.rs

@@ -23,18 +23,44 @@ use cryptohelpers::{
 
 use uuid::Uuid;
 
+mod ban;
 mod source;
 mod forwarded_list;
 
-pub async fn serve(cfg: Config) -> eyre::Result<()>
+fn routing<'a>() -> impl warp::Filter<Error = warp::reject::Rejection> + Clone + 'a
 {
+    let auth = warp::path("auth").and({
+	//let req = warp::path("req")
+	warp::post()
+    });
+
+    let push = warp::path("push").and({
+	warp::post()
+    });
+
+    let get = warp::path("get").and({
+	warp::get()
+    });
+
+    auth.or(push).or(get)
+}
+
+pub async fn serve(cfg: impl Into<Config>) -> eyre::Result<()>
+{
+    let cfg = cfg.into();
+    let bans = ban::Banlist::new();
     // Filter: Extract the client IP from the remote address of the connection of the X-Forwarded-For header if it is trusted in `cfg`.
     let client_ip = warp::addr::remote()
 	.and(warp::header("X-Forwarded-For"))
         .map(source::extract(cfg.trust_x_forwarded_for))
-        .and_then(|req: Result<std::net::IpAddr, _>| async move { req.map_err(warp::reject::custom) });
+    // Extract the IP
+        .and_then(|req: Result<source::ClientInfo, _>| async move { req.map_err(warp::reject::custom) })
+    // Enforce banlist
+        .and_then(bans.filter());
+    //.and_then(|req: source::ClientInfo| async move { Result::<_, std::convert::Infallible>::Ok(req) });
+
+    let r = warp::path("api").and(routing());
 
-    
     Ok(())
 }
 

src/server/web/source.rs

@@ -49,13 +49,24 @@ impl fmt::Display for NoIpError
 ///
 /// # Returns
 /// A filter to perform the extraction
-#[inline] pub fn extract(trust_x: bool) -> impl Fn(Option<SocketAddr>, XForwardedFor) -> Result<IpAddr,NoIpError> + Clone
+#[inline] pub fn extract(trust_x: bool) -> impl Fn(Option<SocketAddr>, XForwardedFor) -> Result<ClientInfo,NoIpError> + Clone
 {
     move |opt, x| {
 	if trust_x {
 	    x.into_first().ok_or(NoIpError)
 	} else {
 	    opt.map(|x| x.ip()).ok_or(NoIpError)
-	}
+	}.map(|ip_addr|
+	      // Create ClientInfo
+	      ClientInfo {
+		  ip_addr
+	      })
     }
 }
+
+/// Information about the client
+#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct ClientInfo
+{
+    pub ip_addr: IpAddr
+}