dubbo 0.4.0

dubbo
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

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

use std::{
    net::{Ipv4Addr, SocketAddr, SocketAddrV4},
    str::FromStr,
};

use crate::logger::tracing::info;
use http::Uri;
use hyper::client::connect::dns::Name;
use tokio::net::TcpStream;
use tower_service::Service;

use crate::triple::transport::resolver::{dns::DnsResolver, Resolve};

#[derive(Clone, Default)]
pub struct HttpConnector<R = DnsResolver> {
    resolver: R,
}

impl HttpConnector {
    pub fn new() -> Self {
        Self {
            resolver: DnsResolver::default(),
        }
    }
}

impl<R> HttpConnector<R> {
    pub fn new_with_resolver(resolver: R) -> HttpConnector<R> {
        Self { resolver }
    }
}

impl<R> Service<Uri> for HttpConnector<R>
where
    R: Resolve + Clone + Send + Sync + 'static,
    R::Future: Send,
{
    type Response = TcpStream;

    type Error = crate::Error;

    type Future = crate::BoxFuture<Self::Response, Self::Error>;

    fn poll_ready(
        &mut self,
        cx: &mut std::task::Context<'_>,
    ) -> std::task::Poll<Result<(), Self::Error>> {
        self.resolver.poll_ready(cx).map_err(|err| err.into())
    }

    fn call(&mut self, uri: Uri) -> Self::Future {
        let mut inner = self.clone();

        Box::pin(async move { inner.call_async(uri).await })
    }
}

impl<R> HttpConnector<R>
where
    R: Resolve + Send + Sync + 'static,
{
    async fn call_async(&mut self, uri: Uri) -> Result<TcpStream, crate::Error> {
        let host = uri.host().unwrap();
        let port = uri.port_u16().unwrap();

        let addr = if let Ok(addr) = host.parse::<Ipv4Addr>() {
            info!("host is ip address: {:?}", host);
            SocketAddr::V4(SocketAddrV4::new(addr, port))
        } else {
            info!("host is dns: {:?}", host);
            let addrs = self
                .resolver
                .resolve(Name::from_str(host).unwrap())
                .await
                .map_err(|err| err.into())?;
            let addrs: Vec<SocketAddr> = addrs
                .map(|mut addr| {
                    addr.set_port(port);
                    addr
                })
                .collect();
            addrs[0]
        };

        let conn = TcpStream::connect(addr).await?;

        Ok(conn)
    }
}