1use super::{
2 auth,
3 db::{ChannelId, MessageId, UserId},
4 AppState,
5};
6use anyhow::anyhow;
7use async_std::{sync::RwLock, task};
8use async_tungstenite::{tungstenite::protocol::Role, WebSocketStream};
9use futures::{future::BoxFuture, FutureExt};
10use postage::{mpsc, prelude::Sink as _, prelude::Stream as _};
11use sha1::{Digest as _, Sha1};
12use std::{
13 any::TypeId,
14 collections::{hash_map, HashMap, HashSet},
15 future::Future,
16 mem,
17 sync::Arc,
18 time::Instant,
19};
20use surf::StatusCode;
21use tide::log;
22use tide::{
23 http::headers::{HeaderName, CONNECTION, UPGRADE},
24 Request, Response,
25};
26use time::OffsetDateTime;
27use zrpc::{
28 auth::random_token,
29 proto::{self, AnyTypedEnvelope, EnvelopedMessage},
30 Connection, ConnectionId, Peer, TypedEnvelope,
31};
32
33type ReplicaId = u16;
34
35type MessageHandler = Box<
36 dyn Send
37 + Sync
38 + Fn(Arc<Server>, Box<dyn AnyTypedEnvelope>) -> BoxFuture<'static, tide::Result<()>>,
39>;
40
41pub struct Server {
42 peer: Arc<Peer>,
43 state: RwLock<ServerState>,
44 app_state: Arc<AppState>,
45 handlers: HashMap<TypeId, MessageHandler>,
46 notifications: Option<mpsc::Sender<()>>,
47}
48
49#[derive(Default)]
50struct ServerState {
51 connections: HashMap<ConnectionId, ConnectionState>,
52 pub worktrees: HashMap<u64, Worktree>,
53 channels: HashMap<ChannelId, Channel>,
54 next_worktree_id: u64,
55}
56
57struct ConnectionState {
58 user_id: UserId,
59 worktrees: HashSet<u64>,
60 channels: HashSet<ChannelId>,
61}
62
63struct Worktree {
64 host_connection_id: Option<ConnectionId>,
65 guest_connection_ids: HashMap<ConnectionId, ReplicaId>,
66 active_replica_ids: HashSet<ReplicaId>,
67 access_token: String,
68 root_name: String,
69 entries: HashMap<u64, proto::Entry>,
70}
71
72#[derive(Default)]
73struct Channel {
74 connection_ids: HashSet<ConnectionId>,
75}
76
77const MESSAGE_COUNT_PER_PAGE: usize = 100;
78const MAX_MESSAGE_LEN: usize = 1024;
79
80impl Server {
81 pub fn new(
82 app_state: Arc<AppState>,
83 peer: Arc<Peer>,
84 notifications: Option<mpsc::Sender<()>>,
85 ) -> Arc<Self> {
86 let mut server = Self {
87 peer,
88 app_state,
89 state: Default::default(),
90 handlers: Default::default(),
91 notifications,
92 };
93
94 server
95 .add_handler(Server::ping)
96 .add_handler(Server::share_worktree)
97 .add_handler(Server::join_worktree)
98 .add_handler(Server::update_worktree)
99 .add_handler(Server::close_worktree)
100 .add_handler(Server::open_buffer)
101 .add_handler(Server::close_buffer)
102 .add_handler(Server::update_buffer)
103 .add_handler(Server::buffer_saved)
104 .add_handler(Server::save_buffer)
105 .add_handler(Server::get_channels)
106 .add_handler(Server::get_users)
107 .add_handler(Server::join_channel)
108 .add_handler(Server::leave_channel)
109 .add_handler(Server::send_channel_message)
110 .add_handler(Server::get_channel_messages);
111
112 Arc::new(server)
113 }
114
115 fn add_handler<F, Fut, M>(&mut self, handler: F) -> &mut Self
116 where
117 F: 'static + Send + Sync + Fn(Arc<Self>, TypedEnvelope<M>) -> Fut,
118 Fut: 'static + Send + Future<Output = tide::Result<()>>,
119 M: EnvelopedMessage,
120 {
121 let prev_handler = self.handlers.insert(
122 TypeId::of::<M>(),
123 Box::new(move |server, envelope| {
124 let envelope = envelope.into_any().downcast::<TypedEnvelope<M>>().unwrap();
125 (handler)(server, *envelope).boxed()
126 }),
127 );
128 if prev_handler.is_some() {
129 panic!("registered a handler for the same message twice");
130 }
131 self
132 }
133
134 pub fn handle_connection(
135 self: &Arc<Self>,
136 connection: Connection,
137 addr: String,
138 user_id: UserId,
139 ) -> impl Future<Output = ()> {
140 let this = self.clone();
141 async move {
142 let (connection_id, handle_io, mut incoming_rx) =
143 this.peer.add_connection(connection).await;
144 this.add_connection(connection_id, user_id).await;
145
146 let handle_io = handle_io.fuse();
147 futures::pin_mut!(handle_io);
148 loop {
149 let next_message = incoming_rx.recv().fuse();
150 futures::pin_mut!(next_message);
151 futures::select_biased! {
152 message = next_message => {
153 if let Some(message) = message {
154 let start_time = Instant::now();
155 log::info!("RPC message received: {}", message.payload_type_name());
156 if let Some(handler) = this.handlers.get(&message.payload_type_id()) {
157 if let Err(err) = (handler)(this.clone(), message).await {
158 log::error!("error handling message: {:?}", err);
159 } else {
160 log::info!("RPC message handled. duration:{:?}", start_time.elapsed());
161 }
162
163 if let Some(mut notifications) = this.notifications.clone() {
164 let _ = notifications.send(()).await;
165 }
166 } else {
167 log::warn!("unhandled message: {}", message.payload_type_name());
168 }
169 } else {
170 log::info!("rpc connection closed {:?}", addr);
171 break;
172 }
173 }
174 handle_io = handle_io => {
175 if let Err(err) = handle_io {
176 log::error!("error handling rpc connection {:?} - {:?}", addr, err);
177 }
178 break;
179 }
180 }
181 }
182
183 if let Err(err) = this.sign_out(connection_id).await {
184 log::error!("error signing out connection {:?} - {:?}", addr, err);
185 }
186 }
187 }
188
189 async fn sign_out(self: &Arc<Self>, connection_id: zrpc::ConnectionId) -> tide::Result<()> {
190 self.peer.disconnect(connection_id).await;
191 let worktree_ids = self.remove_connection(connection_id).await;
192 for worktree_id in worktree_ids {
193 let state = self.state.read().await;
194 if let Some(worktree) = state.worktrees.get(&worktree_id) {
195 broadcast(connection_id, worktree.connection_ids(), |conn_id| {
196 self.peer.send(
197 conn_id,
198 proto::RemovePeer {
199 worktree_id,
200 peer_id: connection_id.0,
201 },
202 )
203 })
204 .await?;
205 }
206 }
207 Ok(())
208 }
209
210 // Add a new connection associated with a given user.
211 async fn add_connection(&self, connection_id: ConnectionId, user_id: UserId) {
212 self.state.write().await.connections.insert(
213 connection_id,
214 ConnectionState {
215 user_id,
216 worktrees: Default::default(),
217 channels: Default::default(),
218 },
219 );
220 }
221
222 // Remove the given connection and its association with any worktrees.
223 async fn remove_connection(&self, connection_id: ConnectionId) -> Vec<u64> {
224 let mut worktree_ids = Vec::new();
225 let mut state = self.state.write().await;
226 if let Some(connection) = state.connections.remove(&connection_id) {
227 for channel_id in connection.channels {
228 if let Some(channel) = state.channels.get_mut(&channel_id) {
229 channel.connection_ids.remove(&connection_id);
230 }
231 }
232 for worktree_id in connection.worktrees {
233 if let Some(worktree) = state.worktrees.get_mut(&worktree_id) {
234 if worktree.host_connection_id == Some(connection_id) {
235 worktree_ids.push(worktree_id);
236 } else if let Some(replica_id) =
237 worktree.guest_connection_ids.remove(&connection_id)
238 {
239 worktree.active_replica_ids.remove(&replica_id);
240 worktree_ids.push(worktree_id);
241 }
242 }
243 }
244 }
245 worktree_ids
246 }
247
248 async fn ping(self: Arc<Server>, request: TypedEnvelope<proto::Ping>) -> tide::Result<()> {
249 self.peer.respond(request.receipt(), proto::Ack {}).await?;
250 Ok(())
251 }
252
253 async fn share_worktree(
254 self: Arc<Server>,
255 mut request: TypedEnvelope<proto::ShareWorktree>,
256 ) -> tide::Result<()> {
257 let mut state = self.state.write().await;
258 let worktree_id = state.next_worktree_id;
259 state.next_worktree_id += 1;
260 let access_token = random_token();
261 let worktree = request
262 .payload
263 .worktree
264 .as_mut()
265 .ok_or_else(|| anyhow!("missing worktree"))?;
266 let entries = mem::take(&mut worktree.entries)
267 .into_iter()
268 .map(|entry| (entry.id, entry))
269 .collect();
270 state.worktrees.insert(
271 worktree_id,
272 Worktree {
273 host_connection_id: Some(request.sender_id),
274 guest_connection_ids: Default::default(),
275 active_replica_ids: Default::default(),
276 access_token: access_token.clone(),
277 root_name: mem::take(&mut worktree.root_name),
278 entries,
279 },
280 );
281
282 self.peer
283 .respond(
284 request.receipt(),
285 proto::ShareWorktreeResponse {
286 worktree_id,
287 access_token,
288 },
289 )
290 .await?;
291 Ok(())
292 }
293
294 async fn join_worktree(
295 self: Arc<Server>,
296 request: TypedEnvelope<proto::OpenWorktree>,
297 ) -> tide::Result<()> {
298 let worktree_id = request.payload.worktree_id;
299 let access_token = &request.payload.access_token;
300
301 let mut state = self.state.write().await;
302 if let Some((peer_replica_id, worktree)) =
303 state.join_worktree(request.sender_id, worktree_id, access_token)
304 {
305 let mut peers = Vec::new();
306 if let Some(host_connection_id) = worktree.host_connection_id {
307 peers.push(proto::Peer {
308 peer_id: host_connection_id.0,
309 replica_id: 0,
310 });
311 }
312 for (peer_conn_id, peer_replica_id) in &worktree.guest_connection_ids {
313 if *peer_conn_id != request.sender_id {
314 peers.push(proto::Peer {
315 peer_id: peer_conn_id.0,
316 replica_id: *peer_replica_id as u32,
317 });
318 }
319 }
320
321 broadcast(request.sender_id, worktree.connection_ids(), |conn_id| {
322 self.peer.send(
323 conn_id,
324 proto::AddPeer {
325 worktree_id,
326 peer: Some(proto::Peer {
327 peer_id: request.sender_id.0,
328 replica_id: peer_replica_id as u32,
329 }),
330 },
331 )
332 })
333 .await?;
334 self.peer
335 .respond(
336 request.receipt(),
337 proto::OpenWorktreeResponse {
338 worktree_id,
339 worktree: Some(proto::Worktree {
340 root_name: worktree.root_name.clone(),
341 entries: worktree.entries.values().cloned().collect(),
342 }),
343 replica_id: peer_replica_id as u32,
344 peers,
345 },
346 )
347 .await?;
348 } else {
349 self.peer
350 .respond(
351 request.receipt(),
352 proto::OpenWorktreeResponse {
353 worktree_id,
354 worktree: None,
355 replica_id: 0,
356 peers: Vec::new(),
357 },
358 )
359 .await?;
360 }
361
362 Ok(())
363 }
364
365 async fn update_worktree(
366 self: Arc<Server>,
367 request: TypedEnvelope<proto::UpdateWorktree>,
368 ) -> tide::Result<()> {
369 {
370 let mut state = self.state.write().await;
371 let worktree = state.write_worktree(request.payload.worktree_id, request.sender_id)?;
372 for entry_id in &request.payload.removed_entries {
373 worktree.entries.remove(&entry_id);
374 }
375
376 for entry in &request.payload.updated_entries {
377 worktree.entries.insert(entry.id, entry.clone());
378 }
379 }
380
381 self.broadcast_in_worktree(request.payload.worktree_id, &request)
382 .await?;
383 Ok(())
384 }
385
386 async fn close_worktree(
387 self: Arc<Server>,
388 request: TypedEnvelope<proto::CloseWorktree>,
389 ) -> tide::Result<()> {
390 let connection_ids;
391 {
392 let mut state = self.state.write().await;
393 let worktree = state.write_worktree(request.payload.worktree_id, request.sender_id)?;
394 connection_ids = worktree.connection_ids();
395 if worktree.host_connection_id == Some(request.sender_id) {
396 worktree.host_connection_id = None;
397 } else if let Some(replica_id) =
398 worktree.guest_connection_ids.remove(&request.sender_id)
399 {
400 worktree.active_replica_ids.remove(&replica_id);
401 }
402 }
403
404 broadcast(request.sender_id, connection_ids, |conn_id| {
405 self.peer.send(
406 conn_id,
407 proto::RemovePeer {
408 worktree_id: request.payload.worktree_id,
409 peer_id: request.sender_id.0,
410 },
411 )
412 })
413 .await?;
414
415 Ok(())
416 }
417
418 async fn open_buffer(
419 self: Arc<Server>,
420 request: TypedEnvelope<proto::OpenBuffer>,
421 ) -> tide::Result<()> {
422 let receipt = request.receipt();
423 let worktree_id = request.payload.worktree_id;
424 let host_connection_id = self
425 .state
426 .read()
427 .await
428 .read_worktree(worktree_id, request.sender_id)?
429 .host_connection_id()?;
430
431 let response = self
432 .peer
433 .forward_request(request.sender_id, host_connection_id, request.payload)
434 .await?;
435 self.peer.respond(receipt, response).await?;
436 Ok(())
437 }
438
439 async fn close_buffer(
440 self: Arc<Server>,
441 request: TypedEnvelope<proto::CloseBuffer>,
442 ) -> tide::Result<()> {
443 let host_connection_id = self
444 .state
445 .read()
446 .await
447 .read_worktree(request.payload.worktree_id, request.sender_id)?
448 .host_connection_id()?;
449
450 self.peer
451 .forward_send(request.sender_id, host_connection_id, request.payload)
452 .await?;
453
454 Ok(())
455 }
456
457 async fn save_buffer(
458 self: Arc<Server>,
459 request: TypedEnvelope<proto::SaveBuffer>,
460 ) -> tide::Result<()> {
461 let host;
462 let guests;
463 {
464 let state = self.state.read().await;
465 let worktree = state.read_worktree(request.payload.worktree_id, request.sender_id)?;
466 host = worktree.host_connection_id()?;
467 guests = worktree
468 .guest_connection_ids
469 .keys()
470 .copied()
471 .collect::<Vec<_>>();
472 }
473
474 let sender = request.sender_id;
475 let receipt = request.receipt();
476 let response = self
477 .peer
478 .forward_request(sender, host, request.payload.clone())
479 .await?;
480
481 broadcast(host, guests, |conn_id| {
482 let response = response.clone();
483 let peer = &self.peer;
484 async move {
485 if conn_id == sender {
486 peer.respond(receipt, response).await
487 } else {
488 peer.forward_send(host, conn_id, response).await
489 }
490 }
491 })
492 .await?;
493
494 Ok(())
495 }
496
497 async fn update_buffer(
498 self: Arc<Server>,
499 request: TypedEnvelope<proto::UpdateBuffer>,
500 ) -> tide::Result<()> {
501 self.broadcast_in_worktree(request.payload.worktree_id, &request)
502 .await?;
503 self.peer.respond(request.receipt(), proto::Ack {}).await?;
504 Ok(())
505 }
506
507 async fn buffer_saved(
508 self: Arc<Server>,
509 request: TypedEnvelope<proto::BufferSaved>,
510 ) -> tide::Result<()> {
511 self.broadcast_in_worktree(request.payload.worktree_id, &request)
512 .await
513 }
514
515 async fn get_channels(
516 self: Arc<Server>,
517 request: TypedEnvelope<proto::GetChannels>,
518 ) -> tide::Result<()> {
519 let user_id = self
520 .state
521 .read()
522 .await
523 .user_id_for_connection(request.sender_id)?;
524 let channels = self.app_state.db.get_accessible_channels(user_id).await?;
525 self.peer
526 .respond(
527 request.receipt(),
528 proto::GetChannelsResponse {
529 channels: channels
530 .into_iter()
531 .map(|chan| proto::Channel {
532 id: chan.id.to_proto(),
533 name: chan.name,
534 })
535 .collect(),
536 },
537 )
538 .await?;
539 Ok(())
540 }
541
542 async fn get_users(
543 self: Arc<Server>,
544 request: TypedEnvelope<proto::GetUsers>,
545 ) -> tide::Result<()> {
546 let user_id = self
547 .state
548 .read()
549 .await
550 .user_id_for_connection(request.sender_id)?;
551 let receipt = request.receipt();
552 let user_ids = request.payload.user_ids.into_iter().map(UserId::from_proto);
553 let users = self
554 .app_state
555 .db
556 .get_users_by_ids(user_id, user_ids)
557 .await?
558 .into_iter()
559 .map(|user| proto::User {
560 id: user.id.to_proto(),
561 avatar_url: format!("https://github.com/{}.png?size=128", user.github_login),
562 github_login: user.github_login,
563 })
564 .collect();
565 self.peer
566 .respond(receipt, proto::GetUsersResponse { users })
567 .await?;
568 Ok(())
569 }
570
571 async fn join_channel(
572 self: Arc<Self>,
573 request: TypedEnvelope<proto::JoinChannel>,
574 ) -> tide::Result<()> {
575 let user_id = self
576 .state
577 .read()
578 .await
579 .user_id_for_connection(request.sender_id)?;
580 let channel_id = ChannelId::from_proto(request.payload.channel_id);
581 if !self
582 .app_state
583 .db
584 .can_user_access_channel(user_id, channel_id)
585 .await?
586 {
587 Err(anyhow!("access denied"))?;
588 }
589
590 self.state
591 .write()
592 .await
593 .join_channel(request.sender_id, channel_id);
594 let messages = self
595 .app_state
596 .db
597 .get_channel_messages(channel_id, MESSAGE_COUNT_PER_PAGE, None)
598 .await?
599 .into_iter()
600 .map(|msg| proto::ChannelMessage {
601 id: msg.id.to_proto(),
602 body: msg.body,
603 timestamp: msg.sent_at.unix_timestamp() as u64,
604 sender_id: msg.sender_id.to_proto(),
605 nonce: Some(msg.nonce.as_u128().into()),
606 })
607 .collect::<Vec<_>>();
608 self.peer
609 .respond(
610 request.receipt(),
611 proto::JoinChannelResponse {
612 done: messages.len() < MESSAGE_COUNT_PER_PAGE,
613 messages,
614 },
615 )
616 .await?;
617 Ok(())
618 }
619
620 async fn leave_channel(
621 self: Arc<Self>,
622 request: TypedEnvelope<proto::LeaveChannel>,
623 ) -> tide::Result<()> {
624 let user_id = self
625 .state
626 .read()
627 .await
628 .user_id_for_connection(request.sender_id)?;
629 let channel_id = ChannelId::from_proto(request.payload.channel_id);
630 if !self
631 .app_state
632 .db
633 .can_user_access_channel(user_id, channel_id)
634 .await?
635 {
636 Err(anyhow!("access denied"))?;
637 }
638
639 self.state
640 .write()
641 .await
642 .leave_channel(request.sender_id, channel_id);
643
644 Ok(())
645 }
646
647 async fn send_channel_message(
648 self: Arc<Self>,
649 request: TypedEnvelope<proto::SendChannelMessage>,
650 ) -> tide::Result<()> {
651 let receipt = request.receipt();
652 let channel_id = ChannelId::from_proto(request.payload.channel_id);
653 let user_id;
654 let connection_ids;
655 {
656 let state = self.state.read().await;
657 user_id = state.user_id_for_connection(request.sender_id)?;
658 if let Some(channel) = state.channels.get(&channel_id) {
659 connection_ids = channel.connection_ids();
660 } else {
661 return Ok(());
662 }
663 }
664
665 // Validate the message body.
666 let body = request.payload.body.trim().to_string();
667 if body.len() > MAX_MESSAGE_LEN {
668 self.peer
669 .respond_with_error(
670 receipt,
671 proto::Error {
672 message: "message is too long".to_string(),
673 },
674 )
675 .await?;
676 return Ok(());
677 }
678 if body.is_empty() {
679 self.peer
680 .respond_with_error(
681 receipt,
682 proto::Error {
683 message: "message can't be blank".to_string(),
684 },
685 )
686 .await?;
687 return Ok(());
688 }
689
690 let timestamp = OffsetDateTime::now_utc();
691 let nonce = if let Some(nonce) = request.payload.nonce {
692 nonce
693 } else {
694 self.peer
695 .respond_with_error(
696 receipt,
697 proto::Error {
698 message: "nonce can't be blank".to_string(),
699 },
700 )
701 .await?;
702 return Ok(());
703 };
704
705 let message_id = self
706 .app_state
707 .db
708 .create_channel_message(channel_id, user_id, &body, timestamp, nonce.clone().into())
709 .await?
710 .to_proto();
711 let message = proto::ChannelMessage {
712 sender_id: user_id.to_proto(),
713 id: message_id,
714 body,
715 timestamp: timestamp.unix_timestamp() as u64,
716 nonce: Some(nonce),
717 };
718 broadcast(request.sender_id, connection_ids, |conn_id| {
719 self.peer.send(
720 conn_id,
721 proto::ChannelMessageSent {
722 channel_id: channel_id.to_proto(),
723 message: Some(message.clone()),
724 },
725 )
726 })
727 .await?;
728 self.peer
729 .respond(
730 receipt,
731 proto::SendChannelMessageResponse {
732 message: Some(message),
733 },
734 )
735 .await?;
736 Ok(())
737 }
738
739 async fn get_channel_messages(
740 self: Arc<Self>,
741 request: TypedEnvelope<proto::GetChannelMessages>,
742 ) -> tide::Result<()> {
743 let user_id = self
744 .state
745 .read()
746 .await
747 .user_id_for_connection(request.sender_id)?;
748 let channel_id = ChannelId::from_proto(request.payload.channel_id);
749 if !self
750 .app_state
751 .db
752 .can_user_access_channel(user_id, channel_id)
753 .await?
754 {
755 Err(anyhow!("access denied"))?;
756 }
757
758 let messages = self
759 .app_state
760 .db
761 .get_channel_messages(
762 channel_id,
763 MESSAGE_COUNT_PER_PAGE,
764 Some(MessageId::from_proto(request.payload.before_message_id)),
765 )
766 .await?
767 .into_iter()
768 .map(|msg| proto::ChannelMessage {
769 id: msg.id.to_proto(),
770 body: msg.body,
771 timestamp: msg.sent_at.unix_timestamp() as u64,
772 sender_id: msg.sender_id.to_proto(),
773 nonce: Some(msg.nonce.as_u128().into()),
774 })
775 .collect::<Vec<_>>();
776 self.peer
777 .respond(
778 request.receipt(),
779 proto::GetChannelMessagesResponse {
780 done: messages.len() < MESSAGE_COUNT_PER_PAGE,
781 messages,
782 },
783 )
784 .await?;
785 Ok(())
786 }
787
788 async fn broadcast_in_worktree<T: proto::EnvelopedMessage>(
789 &self,
790 worktree_id: u64,
791 message: &TypedEnvelope<T>,
792 ) -> tide::Result<()> {
793 let connection_ids = self
794 .state
795 .read()
796 .await
797 .read_worktree(worktree_id, message.sender_id)?
798 .connection_ids();
799
800 broadcast(message.sender_id, connection_ids, |conn_id| {
801 self.peer
802 .forward_send(message.sender_id, conn_id, message.payload.clone())
803 })
804 .await?;
805
806 Ok(())
807 }
808}
809
810pub async fn broadcast<F, T>(
811 sender_id: ConnectionId,
812 receiver_ids: Vec<ConnectionId>,
813 mut f: F,
814) -> anyhow::Result<()>
815where
816 F: FnMut(ConnectionId) -> T,
817 T: Future<Output = anyhow::Result<()>>,
818{
819 let futures = receiver_ids
820 .into_iter()
821 .filter(|id| *id != sender_id)
822 .map(|id| f(id));
823 futures::future::try_join_all(futures).await?;
824 Ok(())
825}
826
827impl ServerState {
828 fn join_channel(&mut self, connection_id: ConnectionId, channel_id: ChannelId) {
829 if let Some(connection) = self.connections.get_mut(&connection_id) {
830 connection.channels.insert(channel_id);
831 self.channels
832 .entry(channel_id)
833 .or_default()
834 .connection_ids
835 .insert(connection_id);
836 }
837 }
838
839 fn leave_channel(&mut self, connection_id: ConnectionId, channel_id: ChannelId) {
840 if let Some(connection) = self.connections.get_mut(&connection_id) {
841 connection.channels.remove(&channel_id);
842 if let hash_map::Entry::Occupied(mut entry) = self.channels.entry(channel_id) {
843 entry.get_mut().connection_ids.remove(&connection_id);
844 if entry.get_mut().connection_ids.is_empty() {
845 entry.remove();
846 }
847 }
848 }
849 }
850
851 fn user_id_for_connection(&self, connection_id: ConnectionId) -> tide::Result<UserId> {
852 Ok(self
853 .connections
854 .get(&connection_id)
855 .ok_or_else(|| anyhow!("unknown connection"))?
856 .user_id)
857 }
858
859 // Add the given connection as a guest of the given worktree
860 fn join_worktree(
861 &mut self,
862 connection_id: ConnectionId,
863 worktree_id: u64,
864 access_token: &str,
865 ) -> Option<(ReplicaId, &Worktree)> {
866 if let Some(worktree) = self.worktrees.get_mut(&worktree_id) {
867 if access_token == worktree.access_token {
868 if let Some(connection) = self.connections.get_mut(&connection_id) {
869 connection.worktrees.insert(worktree_id);
870 }
871
872 let mut replica_id = 1;
873 while worktree.active_replica_ids.contains(&replica_id) {
874 replica_id += 1;
875 }
876 worktree.active_replica_ids.insert(replica_id);
877 worktree
878 .guest_connection_ids
879 .insert(connection_id, replica_id);
880 Some((replica_id, worktree))
881 } else {
882 None
883 }
884 } else {
885 None
886 }
887 }
888
889 fn read_worktree(
890 &self,
891 worktree_id: u64,
892 connection_id: ConnectionId,
893 ) -> tide::Result<&Worktree> {
894 let worktree = self
895 .worktrees
896 .get(&worktree_id)
897 .ok_or_else(|| anyhow!("worktree not found"))?;
898
899 if worktree.host_connection_id == Some(connection_id)
900 || worktree.guest_connection_ids.contains_key(&connection_id)
901 {
902 Ok(worktree)
903 } else {
904 Err(anyhow!(
905 "{} is not a member of worktree {}",
906 connection_id,
907 worktree_id
908 ))?
909 }
910 }
911
912 fn write_worktree(
913 &mut self,
914 worktree_id: u64,
915 connection_id: ConnectionId,
916 ) -> tide::Result<&mut Worktree> {
917 let worktree = self
918 .worktrees
919 .get_mut(&worktree_id)
920 .ok_or_else(|| anyhow!("worktree not found"))?;
921
922 if worktree.host_connection_id == Some(connection_id)
923 || worktree.guest_connection_ids.contains_key(&connection_id)
924 {
925 Ok(worktree)
926 } else {
927 Err(anyhow!(
928 "{} is not a member of worktree {}",
929 connection_id,
930 worktree_id
931 ))?
932 }
933 }
934}
935
936impl Worktree {
937 pub fn connection_ids(&self) -> Vec<ConnectionId> {
938 self.guest_connection_ids
939 .keys()
940 .copied()
941 .chain(self.host_connection_id)
942 .collect()
943 }
944
945 fn host_connection_id(&self) -> tide::Result<ConnectionId> {
946 Ok(self
947 .host_connection_id
948 .ok_or_else(|| anyhow!("host disconnected from worktree"))?)
949 }
950}
951
952impl Channel {
953 fn connection_ids(&self) -> Vec<ConnectionId> {
954 self.connection_ids.iter().copied().collect()
955 }
956}
957
958pub fn add_routes(app: &mut tide::Server<Arc<AppState>>, rpc: &Arc<Peer>) {
959 let server = Server::new(app.state().clone(), rpc.clone(), None);
960 app.at("/rpc").with(auth::VerifyToken).get(move |request: Request<Arc<AppState>>| {
961 let user_id = request.ext::<UserId>().copied();
962 let server = server.clone();
963 async move {
964 const WEBSOCKET_GUID: &str = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
965
966 let connection_upgrade = header_contains_ignore_case(&request, CONNECTION, "upgrade");
967 let upgrade_to_websocket = header_contains_ignore_case(&request, UPGRADE, "websocket");
968 let upgrade_requested = connection_upgrade && upgrade_to_websocket;
969
970 if !upgrade_requested {
971 return Ok(Response::new(StatusCode::UpgradeRequired));
972 }
973
974 let header = match request.header("Sec-Websocket-Key") {
975 Some(h) => h.as_str(),
976 None => return Err(anyhow!("expected sec-websocket-key"))?,
977 };
978
979 let mut response = Response::new(StatusCode::SwitchingProtocols);
980 response.insert_header(UPGRADE, "websocket");
981 response.insert_header(CONNECTION, "Upgrade");
982 let hash = Sha1::new().chain(header).chain(WEBSOCKET_GUID).finalize();
983 response.insert_header("Sec-Websocket-Accept", base64::encode(&hash[..]));
984 response.insert_header("Sec-Websocket-Version", "13");
985
986 let http_res: &mut tide::http::Response = response.as_mut();
987 let upgrade_receiver = http_res.recv_upgrade().await;
988 let addr = request.remote().unwrap_or("unknown").to_string();
989 let user_id = user_id.ok_or_else(|| anyhow!("user_id is not present on request. ensure auth::VerifyToken middleware is present"))?;
990 task::spawn(async move {
991 if let Some(stream) = upgrade_receiver.await {
992 server.handle_connection(Connection::new(WebSocketStream::from_raw_socket(stream, Role::Server, None).await), addr, user_id).await;
993 }
994 });
995
996 Ok(response)
997 }
998 });
999}
1000
1001fn header_contains_ignore_case<T>(
1002 request: &tide::Request<T>,
1003 header_name: HeaderName,
1004 value: &str,
1005) -> bool {
1006 request
1007 .header(header_name)
1008 .map(|h| {
1009 h.as_str()
1010 .split(',')
1011 .any(|s| s.trim().eq_ignore_ascii_case(value.trim()))
1012 })
1013 .unwrap_or(false)
1014}
1015
1016#[cfg(test)]
1017mod tests {
1018 use super::*;
1019 use crate::{
1020 auth,
1021 db::{tests::TestDb, UserId},
1022 github, AppState, Config,
1023 };
1024 use async_std::{sync::RwLockReadGuard, task};
1025 use gpui::TestAppContext;
1026 use parking_lot::Mutex;
1027 use postage::{mpsc, watch};
1028 use serde_json::json;
1029 use sqlx::types::time::OffsetDateTime;
1030 use std::{
1031 path::Path,
1032 sync::{
1033 atomic::{AtomicBool, Ordering::SeqCst},
1034 Arc,
1035 },
1036 time::Duration,
1037 };
1038 use zed::{
1039 channel::{Channel, ChannelDetails, ChannelList},
1040 editor::{Editor, Insert},
1041 fs::{FakeFs, Fs as _},
1042 language::LanguageRegistry,
1043 rpc::{self, Client, Credentials, EstablishConnectionError},
1044 settings,
1045 test::FakeHttpClient,
1046 user::UserStore,
1047 worktree::Worktree,
1048 };
1049 use zrpc::Peer;
1050
1051 #[gpui::test]
1052 async fn test_share_worktree(mut cx_a: TestAppContext, mut cx_b: TestAppContext) {
1053 let (window_b, _) = cx_b.add_window(|_| EmptyView);
1054 let settings = cx_b.read(settings::test).1;
1055 let lang_registry = Arc::new(LanguageRegistry::new());
1056
1057 // Connect to a server as 2 clients.
1058 let mut server = TestServer::start().await;
1059 let (client_a, _) = server.create_client(&mut cx_a, "user_a").await;
1060 let (client_b, _) = server.create_client(&mut cx_b, "user_b").await;
1061
1062 cx_a.foreground().forbid_parking();
1063
1064 // Share a local worktree as client A
1065 let fs = Arc::new(FakeFs::new());
1066 fs.insert_tree(
1067 "/a",
1068 json!({
1069 "a.txt": "a-contents",
1070 "b.txt": "b-contents",
1071 }),
1072 )
1073 .await;
1074 let worktree_a = Worktree::open_local(
1075 client_a.clone(),
1076 "/a".as_ref(),
1077 fs,
1078 lang_registry.clone(),
1079 &mut cx_a.to_async(),
1080 )
1081 .await
1082 .unwrap();
1083 worktree_a
1084 .read_with(&cx_a, |tree, _| tree.as_local().unwrap().scan_complete())
1085 .await;
1086 let (worktree_id, worktree_token) = worktree_a
1087 .update(&mut cx_a, |tree, cx| tree.as_local_mut().unwrap().share(cx))
1088 .await
1089 .unwrap();
1090
1091 // Join that worktree as client B, and see that a guest has joined as client A.
1092 let worktree_b = Worktree::open_remote(
1093 client_b.clone(),
1094 worktree_id,
1095 worktree_token,
1096 lang_registry.clone(),
1097 &mut cx_b.to_async(),
1098 )
1099 .await
1100 .unwrap();
1101 let replica_id_b = worktree_b.read_with(&cx_b, |tree, _| tree.replica_id());
1102 worktree_a
1103 .condition(&cx_a, |tree, _| {
1104 tree.peers()
1105 .values()
1106 .any(|replica_id| *replica_id == replica_id_b)
1107 })
1108 .await;
1109
1110 // Open the same file as client B and client A.
1111 let buffer_b = worktree_b
1112 .update(&mut cx_b, |worktree, cx| worktree.open_buffer("b.txt", cx))
1113 .await
1114 .unwrap();
1115 buffer_b.read_with(&cx_b, |buf, _| assert_eq!(buf.text(), "b-contents"));
1116 worktree_a.read_with(&cx_a, |tree, cx| assert!(tree.has_open_buffer("b.txt", cx)));
1117 let buffer_a = worktree_a
1118 .update(&mut cx_a, |tree, cx| tree.open_buffer("b.txt", cx))
1119 .await
1120 .unwrap();
1121
1122 // Create a selection set as client B and see that selection set as client A.
1123 let editor_b = cx_b.add_view(window_b, |cx| Editor::for_buffer(buffer_b, settings, cx));
1124 buffer_a
1125 .condition(&cx_a, |buffer, _| buffer.selection_sets().count() == 1)
1126 .await;
1127
1128 // Edit the buffer as client B and see that edit as client A.
1129 editor_b.update(&mut cx_b, |editor, cx| {
1130 editor.insert(&Insert("ok, ".into()), cx)
1131 });
1132 buffer_a
1133 .condition(&cx_a, |buffer, _| buffer.text() == "ok, b-contents")
1134 .await;
1135
1136 // Remove the selection set as client B, see those selections disappear as client A.
1137 cx_b.update(move |_| drop(editor_b));
1138 buffer_a
1139 .condition(&cx_a, |buffer, _| buffer.selection_sets().count() == 0)
1140 .await;
1141
1142 // Close the buffer as client A, see that the buffer is closed.
1143 cx_a.update(move |_| drop(buffer_a));
1144 worktree_a
1145 .condition(&cx_a, |tree, cx| !tree.has_open_buffer("b.txt", cx))
1146 .await;
1147
1148 // Dropping the worktree removes client B from client A's peers.
1149 cx_b.update(move |_| drop(worktree_b));
1150 worktree_a
1151 .condition(&cx_a, |tree, _| tree.peers().is_empty())
1152 .await;
1153 }
1154
1155 #[gpui::test]
1156 async fn test_propagate_saves_and_fs_changes_in_shared_worktree(
1157 mut cx_a: TestAppContext,
1158 mut cx_b: TestAppContext,
1159 mut cx_c: TestAppContext,
1160 ) {
1161 cx_a.foreground().forbid_parking();
1162 let lang_registry = Arc::new(LanguageRegistry::new());
1163
1164 // Connect to a server as 3 clients.
1165 let mut server = TestServer::start().await;
1166 let (client_a, _) = server.create_client(&mut cx_a, "user_a").await;
1167 let (client_b, _) = server.create_client(&mut cx_b, "user_b").await;
1168 let (client_c, _) = server.create_client(&mut cx_c, "user_c").await;
1169
1170 let fs = Arc::new(FakeFs::new());
1171
1172 // Share a worktree as client A.
1173 fs.insert_tree(
1174 "/a",
1175 json!({
1176 "file1": "",
1177 "file2": ""
1178 }),
1179 )
1180 .await;
1181
1182 let worktree_a = Worktree::open_local(
1183 client_a.clone(),
1184 "/a".as_ref(),
1185 fs.clone(),
1186 lang_registry.clone(),
1187 &mut cx_a.to_async(),
1188 )
1189 .await
1190 .unwrap();
1191 worktree_a
1192 .read_with(&cx_a, |tree, _| tree.as_local().unwrap().scan_complete())
1193 .await;
1194 let (worktree_id, worktree_token) = worktree_a
1195 .update(&mut cx_a, |tree, cx| tree.as_local_mut().unwrap().share(cx))
1196 .await
1197 .unwrap();
1198
1199 // Join that worktree as clients B and C.
1200 let worktree_b = Worktree::open_remote(
1201 client_b.clone(),
1202 worktree_id,
1203 worktree_token.clone(),
1204 lang_registry.clone(),
1205 &mut cx_b.to_async(),
1206 )
1207 .await
1208 .unwrap();
1209 let worktree_c = Worktree::open_remote(
1210 client_c.clone(),
1211 worktree_id,
1212 worktree_token,
1213 lang_registry.clone(),
1214 &mut cx_c.to_async(),
1215 )
1216 .await
1217 .unwrap();
1218
1219 // Open and edit a buffer as both guests B and C.
1220 let buffer_b = worktree_b
1221 .update(&mut cx_b, |tree, cx| tree.open_buffer("file1", cx))
1222 .await
1223 .unwrap();
1224 let buffer_c = worktree_c
1225 .update(&mut cx_c, |tree, cx| tree.open_buffer("file1", cx))
1226 .await
1227 .unwrap();
1228 buffer_b.update(&mut cx_b, |buf, cx| buf.edit([0..0], "i-am-b, ", cx));
1229 buffer_c.update(&mut cx_c, |buf, cx| buf.edit([0..0], "i-am-c, ", cx));
1230
1231 // Open and edit that buffer as the host.
1232 let buffer_a = worktree_a
1233 .update(&mut cx_a, |tree, cx| tree.open_buffer("file1", cx))
1234 .await
1235 .unwrap();
1236
1237 buffer_a
1238 .condition(&mut cx_a, |buf, _| buf.text() == "i-am-c, i-am-b, ")
1239 .await;
1240 buffer_a.update(&mut cx_a, |buf, cx| {
1241 buf.edit([buf.len()..buf.len()], "i-am-a", cx)
1242 });
1243
1244 // Wait for edits to propagate
1245 buffer_a
1246 .condition(&mut cx_a, |buf, _| buf.text() == "i-am-c, i-am-b, i-am-a")
1247 .await;
1248 buffer_b
1249 .condition(&mut cx_b, |buf, _| buf.text() == "i-am-c, i-am-b, i-am-a")
1250 .await;
1251 buffer_c
1252 .condition(&mut cx_c, |buf, _| buf.text() == "i-am-c, i-am-b, i-am-a")
1253 .await;
1254
1255 // Edit the buffer as the host and concurrently save as guest B.
1256 let save_b = buffer_b.update(&mut cx_b, |buf, cx| buf.save(cx).unwrap());
1257 buffer_a.update(&mut cx_a, |buf, cx| buf.edit([0..0], "hi-a, ", cx));
1258 save_b.await.unwrap();
1259 assert_eq!(
1260 fs.load("/a/file1".as_ref()).await.unwrap(),
1261 "hi-a, i-am-c, i-am-b, i-am-a"
1262 );
1263 buffer_a.read_with(&cx_a, |buf, _| assert!(!buf.is_dirty()));
1264 buffer_b.read_with(&cx_b, |buf, _| assert!(!buf.is_dirty()));
1265 buffer_c.condition(&cx_c, |buf, _| !buf.is_dirty()).await;
1266
1267 // Make changes on host's file system, see those changes on the guests.
1268 fs.rename("/a/file2".as_ref(), "/a/file3".as_ref())
1269 .await
1270 .unwrap();
1271 fs.insert_file(Path::new("/a/file4"), "4".into())
1272 .await
1273 .unwrap();
1274
1275 worktree_b
1276 .condition(&cx_b, |tree, _| tree.file_count() == 3)
1277 .await;
1278 worktree_c
1279 .condition(&cx_c, |tree, _| tree.file_count() == 3)
1280 .await;
1281 worktree_b.read_with(&cx_b, |tree, _| {
1282 assert_eq!(
1283 tree.paths()
1284 .map(|p| p.to_string_lossy())
1285 .collect::<Vec<_>>(),
1286 &["file1", "file3", "file4"]
1287 )
1288 });
1289 worktree_c.read_with(&cx_c, |tree, _| {
1290 assert_eq!(
1291 tree.paths()
1292 .map(|p| p.to_string_lossy())
1293 .collect::<Vec<_>>(),
1294 &["file1", "file3", "file4"]
1295 )
1296 });
1297 }
1298
1299 #[gpui::test]
1300 async fn test_buffer_conflict_after_save(mut cx_a: TestAppContext, mut cx_b: TestAppContext) {
1301 cx_a.foreground().forbid_parking();
1302 let lang_registry = Arc::new(LanguageRegistry::new());
1303
1304 // Connect to a server as 2 clients.
1305 let mut server = TestServer::start().await;
1306 let (client_a, _) = server.create_client(&mut cx_a, "user_a").await;
1307 let (client_b, _) = server.create_client(&mut cx_b, "user_b").await;
1308
1309 // Share a local worktree as client A
1310 let fs = Arc::new(FakeFs::new());
1311 fs.save(Path::new("/a.txt"), &"a-contents".into())
1312 .await
1313 .unwrap();
1314 let worktree_a = Worktree::open_local(
1315 client_a.clone(),
1316 "/".as_ref(),
1317 fs,
1318 lang_registry.clone(),
1319 &mut cx_a.to_async(),
1320 )
1321 .await
1322 .unwrap();
1323 worktree_a
1324 .read_with(&cx_a, |tree, _| tree.as_local().unwrap().scan_complete())
1325 .await;
1326 let (worktree_id, worktree_token) = worktree_a
1327 .update(&mut cx_a, |tree, cx| tree.as_local_mut().unwrap().share(cx))
1328 .await
1329 .unwrap();
1330
1331 // Join that worktree as client B, and see that a guest has joined as client A.
1332 let worktree_b = Worktree::open_remote(
1333 client_b.clone(),
1334 worktree_id,
1335 worktree_token,
1336 lang_registry.clone(),
1337 &mut cx_b.to_async(),
1338 )
1339 .await
1340 .unwrap();
1341
1342 let buffer_b = worktree_b
1343 .update(&mut cx_b, |worktree, cx| worktree.open_buffer("a.txt", cx))
1344 .await
1345 .unwrap();
1346 let mtime = buffer_b.read_with(&cx_b, |buf, _| buf.file().unwrap().mtime);
1347
1348 buffer_b.update(&mut cx_b, |buf, cx| buf.edit([0..0], "world ", cx));
1349 buffer_b.read_with(&cx_b, |buf, _| {
1350 assert!(buf.is_dirty());
1351 assert!(!buf.has_conflict());
1352 });
1353
1354 buffer_b
1355 .update(&mut cx_b, |buf, cx| buf.save(cx))
1356 .unwrap()
1357 .await
1358 .unwrap();
1359 worktree_b
1360 .condition(&cx_b, |_, cx| {
1361 buffer_b.read(cx).file().unwrap().mtime != mtime
1362 })
1363 .await;
1364 buffer_b.read_with(&cx_b, |buf, _| {
1365 assert!(!buf.is_dirty());
1366 assert!(!buf.has_conflict());
1367 });
1368
1369 buffer_b.update(&mut cx_b, |buf, cx| buf.edit([0..0], "hello ", cx));
1370 buffer_b.read_with(&cx_b, |buf, _| {
1371 assert!(buf.is_dirty());
1372 assert!(!buf.has_conflict());
1373 });
1374 }
1375
1376 #[gpui::test]
1377 async fn test_editing_while_guest_opens_buffer(
1378 mut cx_a: TestAppContext,
1379 mut cx_b: TestAppContext,
1380 ) {
1381 cx_a.foreground().forbid_parking();
1382 let lang_registry = Arc::new(LanguageRegistry::new());
1383
1384 // Connect to a server as 2 clients.
1385 let mut server = TestServer::start().await;
1386 let (client_a, _) = server.create_client(&mut cx_a, "user_a").await;
1387 let (client_b, _) = server.create_client(&mut cx_b, "user_b").await;
1388
1389 // Share a local worktree as client A
1390 let fs = Arc::new(FakeFs::new());
1391 fs.save(Path::new("/a.txt"), &"a-contents".into())
1392 .await
1393 .unwrap();
1394 let worktree_a = Worktree::open_local(
1395 client_a.clone(),
1396 "/".as_ref(),
1397 fs,
1398 lang_registry.clone(),
1399 &mut cx_a.to_async(),
1400 )
1401 .await
1402 .unwrap();
1403 worktree_a
1404 .read_with(&cx_a, |tree, _| tree.as_local().unwrap().scan_complete())
1405 .await;
1406 let (worktree_id, worktree_token) = worktree_a
1407 .update(&mut cx_a, |tree, cx| tree.as_local_mut().unwrap().share(cx))
1408 .await
1409 .unwrap();
1410
1411 // Join that worktree as client B, and see that a guest has joined as client A.
1412 let worktree_b = Worktree::open_remote(
1413 client_b.clone(),
1414 worktree_id,
1415 worktree_token,
1416 lang_registry.clone(),
1417 &mut cx_b.to_async(),
1418 )
1419 .await
1420 .unwrap();
1421
1422 let buffer_a = worktree_a
1423 .update(&mut cx_a, |tree, cx| tree.open_buffer("a.txt", cx))
1424 .await
1425 .unwrap();
1426 let buffer_b = cx_b
1427 .background()
1428 .spawn(worktree_b.update(&mut cx_b, |worktree, cx| worktree.open_buffer("a.txt", cx)));
1429
1430 task::yield_now().await;
1431 buffer_a.update(&mut cx_a, |buf, cx| buf.edit([0..0], "z", cx));
1432
1433 let text = buffer_a.read_with(&cx_a, |buf, _| buf.text());
1434 let buffer_b = buffer_b.await.unwrap();
1435 buffer_b.condition(&cx_b, |buf, _| buf.text() == text).await;
1436 }
1437
1438 #[gpui::test]
1439 async fn test_peer_disconnection(mut cx_a: TestAppContext, cx_b: TestAppContext) {
1440 cx_a.foreground().forbid_parking();
1441 let lang_registry = Arc::new(LanguageRegistry::new());
1442
1443 // Connect to a server as 2 clients.
1444 let mut server = TestServer::start().await;
1445 let (client_a, _) = server.create_client(&mut cx_a, "user_a").await;
1446 let (client_b, _) = server.create_client(&mut cx_a, "user_b").await;
1447
1448 // Share a local worktree as client A
1449 let fs = Arc::new(FakeFs::new());
1450 fs.insert_tree(
1451 "/a",
1452 json!({
1453 "a.txt": "a-contents",
1454 "b.txt": "b-contents",
1455 }),
1456 )
1457 .await;
1458 let worktree_a = Worktree::open_local(
1459 client_a.clone(),
1460 "/a".as_ref(),
1461 fs,
1462 lang_registry.clone(),
1463 &mut cx_a.to_async(),
1464 )
1465 .await
1466 .unwrap();
1467 worktree_a
1468 .read_with(&cx_a, |tree, _| tree.as_local().unwrap().scan_complete())
1469 .await;
1470 let (worktree_id, worktree_token) = worktree_a
1471 .update(&mut cx_a, |tree, cx| tree.as_local_mut().unwrap().share(cx))
1472 .await
1473 .unwrap();
1474
1475 // Join that worktree as client B, and see that a guest has joined as client A.
1476 let _worktree_b = Worktree::open_remote(
1477 client_b.clone(),
1478 worktree_id,
1479 worktree_token,
1480 lang_registry.clone(),
1481 &mut cx_b.to_async(),
1482 )
1483 .await
1484 .unwrap();
1485 worktree_a
1486 .condition(&cx_a, |tree, _| tree.peers().len() == 1)
1487 .await;
1488
1489 // Drop client B's connection and ensure client A observes client B leaving the worktree.
1490 client_b.disconnect(&cx_b.to_async()).await.unwrap();
1491 worktree_a
1492 .condition(&cx_a, |tree, _| tree.peers().len() == 0)
1493 .await;
1494 }
1495
1496 #[gpui::test]
1497 async fn test_basic_chat(mut cx_a: TestAppContext, mut cx_b: TestAppContext) {
1498 cx_a.foreground().forbid_parking();
1499
1500 // Connect to a server as 2 clients.
1501 let mut server = TestServer::start().await;
1502 let (client_a, user_store_a) = server.create_client(&mut cx_a, "user_a").await;
1503 let (client_b, user_store_b) = server.create_client(&mut cx_b, "user_b").await;
1504
1505 // Create an org that includes these 2 users.
1506 let db = &server.app_state.db;
1507 let org_id = db.create_org("Test Org", "test-org").await.unwrap();
1508 db.add_org_member(org_id, current_user_id(&user_store_a), false)
1509 .await
1510 .unwrap();
1511 db.add_org_member(org_id, current_user_id(&user_store_b), false)
1512 .await
1513 .unwrap();
1514
1515 // Create a channel that includes all the users.
1516 let channel_id = db.create_org_channel(org_id, "test-channel").await.unwrap();
1517 db.add_channel_member(channel_id, current_user_id(&user_store_a), false)
1518 .await
1519 .unwrap();
1520 db.add_channel_member(channel_id, current_user_id(&user_store_b), false)
1521 .await
1522 .unwrap();
1523 db.create_channel_message(
1524 channel_id,
1525 current_user_id(&user_store_b),
1526 "hello A, it's B.",
1527 OffsetDateTime::now_utc(),
1528 1,
1529 )
1530 .await
1531 .unwrap();
1532
1533 let channels_a = cx_a.add_model(|cx| ChannelList::new(user_store_a, client_a, cx));
1534 channels_a
1535 .condition(&mut cx_a, |list, _| list.available_channels().is_some())
1536 .await;
1537 channels_a.read_with(&cx_a, |list, _| {
1538 assert_eq!(
1539 list.available_channels().unwrap(),
1540 &[ChannelDetails {
1541 id: channel_id.to_proto(),
1542 name: "test-channel".to_string()
1543 }]
1544 )
1545 });
1546 let channel_a = channels_a.update(&mut cx_a, |this, cx| {
1547 this.get_channel(channel_id.to_proto(), cx).unwrap()
1548 });
1549 channel_a.read_with(&cx_a, |channel, _| assert!(channel.messages().is_empty()));
1550 channel_a
1551 .condition(&cx_a, |channel, _| {
1552 channel_messages(channel)
1553 == [("user_b".to_string(), "hello A, it's B.".to_string(), false)]
1554 })
1555 .await;
1556
1557 let channels_b = cx_b.add_model(|cx| ChannelList::new(user_store_b, client_b, cx));
1558 channels_b
1559 .condition(&mut cx_b, |list, _| list.available_channels().is_some())
1560 .await;
1561 channels_b.read_with(&cx_b, |list, _| {
1562 assert_eq!(
1563 list.available_channels().unwrap(),
1564 &[ChannelDetails {
1565 id: channel_id.to_proto(),
1566 name: "test-channel".to_string()
1567 }]
1568 )
1569 });
1570
1571 let channel_b = channels_b.update(&mut cx_b, |this, cx| {
1572 this.get_channel(channel_id.to_proto(), cx).unwrap()
1573 });
1574 channel_b.read_with(&cx_b, |channel, _| assert!(channel.messages().is_empty()));
1575 channel_b
1576 .condition(&cx_b, |channel, _| {
1577 channel_messages(channel)
1578 == [("user_b".to_string(), "hello A, it's B.".to_string(), false)]
1579 })
1580 .await;
1581
1582 channel_a
1583 .update(&mut cx_a, |channel, cx| {
1584 channel
1585 .send_message("oh, hi B.".to_string(), cx)
1586 .unwrap()
1587 .detach();
1588 let task = channel.send_message("sup".to_string(), cx).unwrap();
1589 assert_eq!(
1590 channel_messages(channel),
1591 &[
1592 ("user_b".to_string(), "hello A, it's B.".to_string(), false),
1593 ("user_a".to_string(), "oh, hi B.".to_string(), true),
1594 ("user_a".to_string(), "sup".to_string(), true)
1595 ]
1596 );
1597 task
1598 })
1599 .await
1600 .unwrap();
1601
1602 channel_b
1603 .condition(&cx_b, |channel, _| {
1604 channel_messages(channel)
1605 == [
1606 ("user_b".to_string(), "hello A, it's B.".to_string(), false),
1607 ("user_a".to_string(), "oh, hi B.".to_string(), false),
1608 ("user_a".to_string(), "sup".to_string(), false),
1609 ]
1610 })
1611 .await;
1612
1613 assert_eq!(
1614 server.state().await.channels[&channel_id]
1615 .connection_ids
1616 .len(),
1617 2
1618 );
1619 cx_b.update(|_| drop(channel_b));
1620 server
1621 .condition(|state| state.channels[&channel_id].connection_ids.len() == 1)
1622 .await;
1623
1624 cx_a.update(|_| drop(channel_a));
1625 server
1626 .condition(|state| !state.channels.contains_key(&channel_id))
1627 .await;
1628 }
1629
1630 #[gpui::test]
1631 async fn test_chat_message_validation(mut cx_a: TestAppContext) {
1632 cx_a.foreground().forbid_parking();
1633
1634 let mut server = TestServer::start().await;
1635 let (client_a, user_store_a) = server.create_client(&mut cx_a, "user_a").await;
1636
1637 let db = &server.app_state.db;
1638 let org_id = db.create_org("Test Org", "test-org").await.unwrap();
1639 let channel_id = db.create_org_channel(org_id, "test-channel").await.unwrap();
1640 db.add_org_member(org_id, current_user_id(&user_store_a), false)
1641 .await
1642 .unwrap();
1643 db.add_channel_member(channel_id, current_user_id(&user_store_a), false)
1644 .await
1645 .unwrap();
1646
1647 let channels_a = cx_a.add_model(|cx| ChannelList::new(user_store_a, client_a, cx));
1648 channels_a
1649 .condition(&mut cx_a, |list, _| list.available_channels().is_some())
1650 .await;
1651 let channel_a = channels_a.update(&mut cx_a, |this, cx| {
1652 this.get_channel(channel_id.to_proto(), cx).unwrap()
1653 });
1654
1655 // Messages aren't allowed to be too long.
1656 channel_a
1657 .update(&mut cx_a, |channel, cx| {
1658 let long_body = "this is long.\n".repeat(1024);
1659 channel.send_message(long_body, cx).unwrap()
1660 })
1661 .await
1662 .unwrap_err();
1663
1664 // Messages aren't allowed to be blank.
1665 channel_a.update(&mut cx_a, |channel, cx| {
1666 channel.send_message(String::new(), cx).unwrap_err()
1667 });
1668
1669 // Leading and trailing whitespace are trimmed.
1670 channel_a
1671 .update(&mut cx_a, |channel, cx| {
1672 channel
1673 .send_message("\n surrounded by whitespace \n".to_string(), cx)
1674 .unwrap()
1675 })
1676 .await
1677 .unwrap();
1678 assert_eq!(
1679 db.get_channel_messages(channel_id, 10, None)
1680 .await
1681 .unwrap()
1682 .iter()
1683 .map(|m| &m.body)
1684 .collect::<Vec<_>>(),
1685 &["surrounded by whitespace"]
1686 );
1687 }
1688
1689 #[gpui::test]
1690 async fn test_chat_reconnection(mut cx_a: TestAppContext, mut cx_b: TestAppContext) {
1691 cx_a.foreground().forbid_parking();
1692 let http = FakeHttpClient::new(|_| async move { Ok(surf::http::Response::new(404)) });
1693
1694 // Connect to a server as 2 clients.
1695 let mut server = TestServer::start().await;
1696 let (client_a, user_store_a) = server.create_client(&mut cx_a, "user_a").await;
1697 let (client_b, user_store_b) = server.create_client(&mut cx_b, "user_b").await;
1698 let mut status_b = client_b.status();
1699
1700 // Create an org that includes these 2 users.
1701 let db = &server.app_state.db;
1702 let org_id = db.create_org("Test Org", "test-org").await.unwrap();
1703 db.add_org_member(org_id, current_user_id(&user_store_a), false)
1704 .await
1705 .unwrap();
1706 db.add_org_member(org_id, current_user_id(&user_store_b), false)
1707 .await
1708 .unwrap();
1709
1710 // Create a channel that includes all the users.
1711 let channel_id = db.create_org_channel(org_id, "test-channel").await.unwrap();
1712 db.add_channel_member(channel_id, current_user_id(&user_store_a), false)
1713 .await
1714 .unwrap();
1715 db.add_channel_member(channel_id, current_user_id(&user_store_b), false)
1716 .await
1717 .unwrap();
1718 db.create_channel_message(
1719 channel_id,
1720 current_user_id(&user_store_b),
1721 "hello A, it's B.",
1722 OffsetDateTime::now_utc(),
1723 2,
1724 )
1725 .await
1726 .unwrap();
1727
1728 let user_store_a =
1729 UserStore::new(client_a.clone(), http.clone(), cx_a.background().as_ref());
1730 let channels_a = cx_a.add_model(|cx| ChannelList::new(user_store_a, client_a, cx));
1731 channels_a
1732 .condition(&mut cx_a, |list, _| list.available_channels().is_some())
1733 .await;
1734
1735 channels_a.read_with(&cx_a, |list, _| {
1736 assert_eq!(
1737 list.available_channels().unwrap(),
1738 &[ChannelDetails {
1739 id: channel_id.to_proto(),
1740 name: "test-channel".to_string()
1741 }]
1742 )
1743 });
1744 let channel_a = channels_a.update(&mut cx_a, |this, cx| {
1745 this.get_channel(channel_id.to_proto(), cx).unwrap()
1746 });
1747 channel_a.read_with(&cx_a, |channel, _| assert!(channel.messages().is_empty()));
1748 channel_a
1749 .condition(&cx_a, |channel, _| {
1750 channel_messages(channel)
1751 == [("user_b".to_string(), "hello A, it's B.".to_string(), false)]
1752 })
1753 .await;
1754
1755 let channels_b = cx_b.add_model(|cx| ChannelList::new(user_store_b.clone(), client_b, cx));
1756 channels_b
1757 .condition(&mut cx_b, |list, _| list.available_channels().is_some())
1758 .await;
1759 channels_b.read_with(&cx_b, |list, _| {
1760 assert_eq!(
1761 list.available_channels().unwrap(),
1762 &[ChannelDetails {
1763 id: channel_id.to_proto(),
1764 name: "test-channel".to_string()
1765 }]
1766 )
1767 });
1768
1769 let channel_b = channels_b.update(&mut cx_b, |this, cx| {
1770 this.get_channel(channel_id.to_proto(), cx).unwrap()
1771 });
1772 channel_b.read_with(&cx_b, |channel, _| assert!(channel.messages().is_empty()));
1773 channel_b
1774 .condition(&cx_b, |channel, _| {
1775 channel_messages(channel)
1776 == [("user_b".to_string(), "hello A, it's B.".to_string(), false)]
1777 })
1778 .await;
1779
1780 // Disconnect client B, ensuring we can still access its cached channel data.
1781 server.forbid_connections();
1782 server.disconnect_client(current_user_id(&user_store_b));
1783 while !matches!(
1784 status_b.recv().await,
1785 Some(rpc::Status::ReconnectionError { .. })
1786 ) {}
1787
1788 channels_b.read_with(&cx_b, |channels, _| {
1789 assert_eq!(
1790 channels.available_channels().unwrap(),
1791 [ChannelDetails {
1792 id: channel_id.to_proto(),
1793 name: "test-channel".to_string()
1794 }]
1795 )
1796 });
1797 channel_b.read_with(&cx_b, |channel, _| {
1798 assert_eq!(
1799 channel_messages(channel),
1800 [("user_b".to_string(), "hello A, it's B.".to_string(), false)]
1801 )
1802 });
1803
1804 // Send a message from client B while it is disconnected.
1805 channel_b
1806 .update(&mut cx_b, |channel, cx| {
1807 let task = channel
1808 .send_message("can you see this?".to_string(), cx)
1809 .unwrap();
1810 assert_eq!(
1811 channel_messages(channel),
1812 &[
1813 ("user_b".to_string(), "hello A, it's B.".to_string(), false),
1814 ("user_b".to_string(), "can you see this?".to_string(), true)
1815 ]
1816 );
1817 task
1818 })
1819 .await
1820 .unwrap_err();
1821
1822 // Send a message from client A while B is disconnected.
1823 channel_a
1824 .update(&mut cx_a, |channel, cx| {
1825 channel
1826 .send_message("oh, hi B.".to_string(), cx)
1827 .unwrap()
1828 .detach();
1829 let task = channel.send_message("sup".to_string(), cx).unwrap();
1830 assert_eq!(
1831 channel_messages(channel),
1832 &[
1833 ("user_b".to_string(), "hello A, it's B.".to_string(), false),
1834 ("user_a".to_string(), "oh, hi B.".to_string(), true),
1835 ("user_a".to_string(), "sup".to_string(), true)
1836 ]
1837 );
1838 task
1839 })
1840 .await
1841 .unwrap();
1842
1843 // Give client B a chance to reconnect.
1844 server.allow_connections();
1845 cx_b.foreground().advance_clock(Duration::from_secs(10));
1846
1847 // Verify that B sees the new messages upon reconnection, as well as the message client B
1848 // sent while offline.
1849 channel_b
1850 .condition(&cx_b, |channel, _| {
1851 channel_messages(channel)
1852 == [
1853 ("user_b".to_string(), "hello A, it's B.".to_string(), false),
1854 ("user_a".to_string(), "oh, hi B.".to_string(), false),
1855 ("user_a".to_string(), "sup".to_string(), false),
1856 ("user_b".to_string(), "can you see this?".to_string(), false),
1857 ]
1858 })
1859 .await;
1860
1861 // Ensure client A and B can communicate normally after reconnection.
1862 channel_a
1863 .update(&mut cx_a, |channel, cx| {
1864 channel.send_message("you online?".to_string(), cx).unwrap()
1865 })
1866 .await
1867 .unwrap();
1868 channel_b
1869 .condition(&cx_b, |channel, _| {
1870 channel_messages(channel)
1871 == [
1872 ("user_b".to_string(), "hello A, it's B.".to_string(), false),
1873 ("user_a".to_string(), "oh, hi B.".to_string(), false),
1874 ("user_a".to_string(), "sup".to_string(), false),
1875 ("user_b".to_string(), "can you see this?".to_string(), false),
1876 ("user_a".to_string(), "you online?".to_string(), false),
1877 ]
1878 })
1879 .await;
1880
1881 channel_b
1882 .update(&mut cx_b, |channel, cx| {
1883 channel.send_message("yep".to_string(), cx).unwrap()
1884 })
1885 .await
1886 .unwrap();
1887 channel_a
1888 .condition(&cx_a, |channel, _| {
1889 channel_messages(channel)
1890 == [
1891 ("user_b".to_string(), "hello A, it's B.".to_string(), false),
1892 ("user_a".to_string(), "oh, hi B.".to_string(), false),
1893 ("user_a".to_string(), "sup".to_string(), false),
1894 ("user_b".to_string(), "can you see this?".to_string(), false),
1895 ("user_a".to_string(), "you online?".to_string(), false),
1896 ("user_b".to_string(), "yep".to_string(), false),
1897 ]
1898 })
1899 .await;
1900 }
1901
1902 struct TestServer {
1903 peer: Arc<Peer>,
1904 app_state: Arc<AppState>,
1905 server: Arc<Server>,
1906 notifications: mpsc::Receiver<()>,
1907 connection_killers: Arc<Mutex<HashMap<UserId, watch::Sender<Option<()>>>>>,
1908 forbid_connections: Arc<AtomicBool>,
1909 _test_db: TestDb,
1910 }
1911
1912 impl TestServer {
1913 async fn start() -> Self {
1914 let test_db = TestDb::new();
1915 let app_state = Self::build_app_state(&test_db).await;
1916 let peer = Peer::new();
1917 let notifications = mpsc::channel(128);
1918 let server = Server::new(app_state.clone(), peer.clone(), Some(notifications.0));
1919 Self {
1920 peer,
1921 app_state,
1922 server,
1923 notifications: notifications.1,
1924 connection_killers: Default::default(),
1925 forbid_connections: Default::default(),
1926 _test_db: test_db,
1927 }
1928 }
1929
1930 async fn create_client(
1931 &mut self,
1932 cx: &mut TestAppContext,
1933 name: &str,
1934 ) -> (Arc<Client>, Arc<UserStore>) {
1935 let user_id = self.app_state.db.create_user(name, false).await.unwrap();
1936 let client_name = name.to_string();
1937 let mut client = Client::new();
1938 let server = self.server.clone();
1939 let connection_killers = self.connection_killers.clone();
1940 let forbid_connections = self.forbid_connections.clone();
1941 Arc::get_mut(&mut client)
1942 .unwrap()
1943 .override_authenticate(move |cx| {
1944 cx.spawn(|_| async move {
1945 let access_token = "the-token".to_string();
1946 Ok(Credentials {
1947 user_id: user_id.0 as u64,
1948 access_token,
1949 })
1950 })
1951 })
1952 .override_establish_connection(move |credentials, cx| {
1953 assert_eq!(credentials.user_id, user_id.0 as u64);
1954 assert_eq!(credentials.access_token, "the-token");
1955
1956 let server = server.clone();
1957 let connection_killers = connection_killers.clone();
1958 let forbid_connections = forbid_connections.clone();
1959 let client_name = client_name.clone();
1960 cx.spawn(move |cx| async move {
1961 if forbid_connections.load(SeqCst) {
1962 Err(EstablishConnectionError::other(anyhow!(
1963 "server is forbidding connections"
1964 )))
1965 } else {
1966 let (client_conn, server_conn, kill_conn) = Connection::in_memory();
1967 connection_killers.lock().insert(user_id, kill_conn);
1968 cx.background()
1969 .spawn(server.handle_connection(server_conn, client_name, user_id))
1970 .detach();
1971 Ok(client_conn)
1972 }
1973 })
1974 });
1975
1976 let http = FakeHttpClient::new(|_| async move { Ok(surf::http::Response::new(404)) });
1977 client
1978 .authenticate_and_connect(&cx.to_async())
1979 .await
1980 .unwrap();
1981
1982 let user_store = UserStore::new(client.clone(), http, &cx.background());
1983 let mut authed_user = user_store.watch_current_user();
1984 while authed_user.recv().await.unwrap().is_none() {}
1985
1986 (client, user_store)
1987 }
1988
1989 fn disconnect_client(&self, user_id: UserId) {
1990 if let Some(mut kill_conn) = self.connection_killers.lock().remove(&user_id) {
1991 let _ = kill_conn.try_send(Some(()));
1992 }
1993 }
1994
1995 fn forbid_connections(&self) {
1996 self.forbid_connections.store(true, SeqCst);
1997 }
1998
1999 fn allow_connections(&self) {
2000 self.forbid_connections.store(false, SeqCst);
2001 }
2002
2003 async fn build_app_state(test_db: &TestDb) -> Arc<AppState> {
2004 let mut config = Config::default();
2005 config.session_secret = "a".repeat(32);
2006 config.database_url = test_db.url.clone();
2007 let github_client = github::AppClient::test();
2008 Arc::new(AppState {
2009 db: test_db.db().clone(),
2010 handlebars: Default::default(),
2011 auth_client: auth::build_client("", ""),
2012 repo_client: github::RepoClient::test(&github_client),
2013 github_client,
2014 config,
2015 })
2016 }
2017
2018 async fn state<'a>(&'a self) -> RwLockReadGuard<'a, ServerState> {
2019 self.server.state.read().await
2020 }
2021
2022 async fn condition<F>(&mut self, mut predicate: F)
2023 where
2024 F: FnMut(&ServerState) -> bool,
2025 {
2026 async_std::future::timeout(Duration::from_millis(500), async {
2027 while !(predicate)(&*self.server.state.read().await) {
2028 self.notifications.recv().await;
2029 }
2030 })
2031 .await
2032 .expect("condition timed out");
2033 }
2034 }
2035
2036 impl Drop for TestServer {
2037 fn drop(&mut self) {
2038 task::block_on(self.peer.reset());
2039 }
2040 }
2041
2042 fn current_user_id(user_store: &Arc<UserStore>) -> UserId {
2043 UserId::from_proto(user_store.current_user().unwrap().id)
2044 }
2045
2046 fn channel_messages(channel: &Channel) -> Vec<(String, String, bool)> {
2047 channel
2048 .messages()
2049 .cursor::<(), ()>()
2050 .map(|m| {
2051 (
2052 m.sender.github_login.clone(),
2053 m.body.clone(),
2054 m.is_pending(),
2055 )
2056 })
2057 .collect()
2058 }
2059
2060 struct EmptyView;
2061
2062 impl gpui::Entity for EmptyView {
2063 type Event = ();
2064 }
2065
2066 impl gpui::View for EmptyView {
2067 fn ui_name() -> &'static str {
2068 "empty view"
2069 }
2070
2071 fn render(&mut self, _: &mut gpui::RenderContext<Self>) -> gpui::ElementBox {
2072 gpui::Element::boxed(gpui::elements::Empty)
2073 }
2074 }
2075}