zero4rs 2.0.0

zero4rs is a powerful, pragmatic, and extremely fast web framework for Rust
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80

//! A multi-room chat server.

use tokio::sync::{mpsc, oneshot};

use super::{Command, ConnId};

/// Handle and command sender for chat server.
///
/// Reduces boilerplate of setting up response channels in WebSocket handlers.
#[derive(Clone)]
pub struct ChatServerHandle {
    pub cmd_tx: mpsc::UnboundedSender<Command>,
    pub context: actix_web::web::Data<crate::server::AppContext>,
}

impl ChatServerHandle {
    /// Register client message sender and obtain connection ID.
    pub async fn connect(&self, conn_tx: mpsc::UnboundedSender<String>) -> ConnId {
        let (res_tx, res_rx) = oneshot::channel();

        // unwrap: chat server should not have been dropped
        self.cmd_tx
            .send(Command::Connect { conn_tx, res_tx })
            .unwrap();

        // unwrap: chat server does not drop out response channel
        res_rx.await.unwrap()
    }

    /// List all created rooms.
    pub async fn list_rooms(&self) -> Vec<String> {
        let (res_tx, res_rx) = oneshot::channel();

        // unwrap: chat server should not have been dropped
        self.cmd_tx.send(Command::List { res_tx }).unwrap();

        // unwrap: chat server does not drop our response channel
        res_rx.await.unwrap()
    }

    /// Join `room`, creating it if it does not exist.
    pub async fn join_room(&self, conn: ConnId, room: impl Into<String>) {
        let (res_tx, res_rx) = oneshot::channel();

        // unwrap: chat server should not have been dropped
        self.cmd_tx
            .send(Command::Join {
                conn,
                room: room.into(),
                res_tx,
            })
            .unwrap();

        // unwrap: chat server does not drop our response channel
        res_rx.await.unwrap();
    }

    /// Broadcast message to current room.
    pub async fn send_message(&self, conn: ConnId, msg: impl Into<String>) {
        let (res_tx, res_rx) = oneshot::channel();

        // unwrap: chat server should not have been dropped
        self.cmd_tx
            .send(Command::Message {
                msg: msg.into(),
                conn,
                res_tx,
            })
            .unwrap();

        // unwrap: chat server does not drop our response channel
        res_rx.await.unwrap();
    }

    /// Unregister message sender and broadcast disconnection message to current room.
    pub fn disconnect(&self, conn: ConnId) {
        // unwrap: chat server should not have been dropped
        self.cmd_tx.send(Command::Disconnect { conn }).unwrap();
    }
}