connexa 0.5.3

High level abstraction of rust-libp2p
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
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128

use crate::error::{ConnexaResult, Error};
use crate::handle::Connexa;
use crate::types::StreamCommand;
use bytes::Bytes;
use futures::channel::oneshot;
use libp2p::{PeerId, StreamProtocol};

pub struct ConnexaStream<'a, T, K> {
    connexa: &'a Connexa<T, K>,
}

impl<'a, T, K> Copy for ConnexaStream<'a, T, K> {}

impl<'a, T, K> Clone for ConnexaStream<'a, T, K> {
    fn clone(&self) -> Self {
        *self
    }
}

impl<'a, T, K> ConnexaStream<'a, T, K>
where
    T: Send + Sync + 'static,
{
    pub(crate) fn new(connexa: &'a Connexa<T, K>) -> Self {
        Self { connexa }
    }

    /// Creates a new stream with the specified protocol
    pub async fn new_stream(
        &self,
        protocol: StreamProtocol,
    ) -> ConnexaResult<libp2p_stream::IncomingStreams> {
        let (tx, rx) = oneshot::channel();
        self.connexa
            .to_task
            .clone()
            .send(StreamCommand::NewStream { protocol, resp: tx }.into())
            .await
            .map_err(|_| Error::ChannelClosed)?;

        rx.await.map_err(|_| Error::ChannelClosed)?
    }

    /// Gets a control handle for managing streams
    pub async fn control_handle(&self) -> ConnexaResult<libp2p_stream::Control> {
        let (tx, rx) = oneshot::channel();
        self.connexa
            .to_task
            .clone()
            .send(StreamCommand::ControlHandle { resp: tx }.into())
            .await
            .map_err(|_| Error::ChannelClosed)?;

        rx.await.map_err(|_| Error::ChannelClosed)?
    }

    /// Opens a stream with the specified protocol
    pub async fn open_stream(
        &self,
        peer_id: PeerId,
        protocol: impl IntoStreamProtocol,
    ) -> ConnexaResult<libp2p::Stream> {
        let protocol: StreamProtocol = protocol.into_protocol()?;

        let mut control = self.control_handle().await?;
        let stream = control
            .open_stream(peer_id, protocol)
            .await
            .map_err(std::io::Error::other)?;
        Ok(stream)
    }
}

pub trait IntoStreamProtocol {
    fn into_protocol(self) -> std::io::Result<StreamProtocol>;
}

impl IntoStreamProtocol for StreamProtocol {
    fn into_protocol(self) -> std::io::Result<StreamProtocol> {
        Ok(self)
    }
}

impl IntoStreamProtocol for String {
    fn into_protocol(self) -> std::io::Result<StreamProtocol> {
        StreamProtocol::try_from_owned(self).map_err(std::io::Error::other)
    }
}

impl IntoStreamProtocol for &String {
    fn into_protocol(self) -> std::io::Result<StreamProtocol> {
        StreamProtocol::try_from_owned(self.to_owned()).map_err(std::io::Error::other)
    }
}

impl IntoStreamProtocol for &'static str {
    fn into_protocol(self) -> std::io::Result<StreamProtocol> {
        Ok(StreamProtocol::new(self))
    }
}

impl IntoStreamProtocol for Bytes {
    fn into_protocol(self) -> std::io::Result<StreamProtocol> {
        let protocol = String::from_utf8_lossy(&self).to_string();
        protocol.into_protocol()
    }
}

impl IntoStreamProtocol for &Bytes {
    fn into_protocol(self) -> std::io::Result<StreamProtocol> {
        let protocol = String::from_utf8_lossy(self).to_string();
        protocol.into_protocol()
    }
}

impl IntoStreamProtocol for Vec<u8> {
    fn into_protocol(self) -> std::io::Result<StreamProtocol> {
        let protocol = String::from_utf8_lossy(&self).to_string();
        protocol.into_protocol()
    }
}

impl IntoStreamProtocol for &[u8] {
    fn into_protocol(self) -> std::io::Result<StreamProtocol> {
        let protocol = String::from_utf8_lossy(self).to_string();
        protocol.into_protocol()
    }
}