orbitcast 0.1.10

Real-time WebSocket server with ActionCable protocol for Mothership
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
81
82
83
84
85
86
87
88
89
90
91
92
93
94

use std::time::Duration;

use anyhow::Context;
use tonic::client::Grpc;
use tonic::codegen::http::uri::PathAndQuery;
use tonic::codec::ProstCodec;
use tonic::metadata::MetadataValue;
use tonic::transport::{Channel, Endpoint};
use tonic::Request;

use crate::rpc::anycable::{CommandMessage, CommandResponse, ConnectionRequest, ConnectionResponse,
    DisconnectRequest, DisconnectResponse};

pub struct AnyCableRpc {
    channel: Channel,
    timeout: Option<Duration>,
}

const PROTO_VERSIONS: &str = "v1";

impl AnyCableRpc {
    pub async fn connect(addr: &str, timeout: Option<Duration>) -> anyhow::Result<Self> {
        let endpoint = Endpoint::from_shared(normalize_rpc_addr(addr))?
            .connect_timeout(Duration::from_secs(5));
        let channel = endpoint
            .connect()
            .await
            .with_context(|| format!("failed to connect to AnyCable RPC at {}", addr))?;

        Ok(Self { channel, timeout })
    }

    pub async fn connect_request(
        &self,
        request: ConnectionRequest,
    ) -> anyhow::Result<ConnectionResponse> {
        self.unary(
            request,
            "/anycable.RPC/Connect",
        )
        .await
    }

    pub async fn command(&self, message: CommandMessage) -> anyhow::Result<CommandResponse> {
        self.unary(
            message,
            "/anycable.RPC/Command",
        )
        .await
    }

    pub async fn disconnect(
        &self,
        request: DisconnectRequest,
    ) -> anyhow::Result<DisconnectResponse> {
        self.unary(
            request,
            "/anycable.RPC/Disconnect",
        )
        .await
    }

    async fn unary<Req, Res>(&self, message: Req, path: &'static str) -> anyhow::Result<Res>
    where
        Req: prost::Message + 'static,
        Res: prost::Message + Default + 'static,
    {
        let mut grpc = Grpc::new(self.channel.clone());
        grpc
            .ready()
            .await
            .context("AnyCable RPC service not ready")?;
        let mut request = Request::new(message);
        request
            .metadata_mut()
            .insert("protov", MetadataValue::from_static(PROTO_VERSIONS));
        if let Some(timeout) = self.timeout {
            request.set_timeout(timeout);
        }
        let response = grpc
            .unary(request, PathAndQuery::from_static(path), ProstCodec::default())
            .await?
            .into_inner();
        Ok(response)
    }
}

fn normalize_rpc_addr(addr: &str) -> String {
    if addr.starts_with("http://") || addr.starts_with("https://") {
        addr.to_string()
    } else {
        format!("http://{}", addr)
    }
}