有条件地使用 ProxyConnector 或 HTTPConnector

Question

我想使用 hyper crate 发出 HTTP 请求。如果用户提供了代理设置，则请求必须通过代理，否则请求将不通过代理发送。

这是我的方法：-


use hyper::Client;
use hyper::client::HttpConnector;
use hyper_proxy::Intercept;
use hyper_proxy::Proxy;
use hyper_proxy::ProxyConnector;

fn main(){
    let proxy_url_opt:Option<String> = Some(String::from("http://ip-address:port"))

    let client = match proxy_url_opt { // Line 68
        Some(proxy_url)=>{
            let uri_str = &proxy_url;
            let proxy_uri = uri_str.parse().unwrap();
            let mut proxy = Proxy::new(Intercept::All, proxy_uri);

            let connector = HttpConnector::new();
            let proxy_connector = ProxyConnector::from_proxy(connector, proxy).unwrap();

            let client = Client::builder().build(proxy_connector);

            client // Line 80
        }
        None=>{
            Client::new() // Line 83
        }
    };   

    // while condition {

      let response = client.request(request).await?; 

    // }
}

但是这段代码给我错误。

match arms have incompatible types

expected struct `hyper_proxy::ProxyConnector`, found struct `hyper::client::connect::http::HttpConnector`

note: expected type `hyper::client::Client<hyper_proxy::ProxyConnector<hyper::client::connect::http::HttpConnector>, _>`
       found struct `hyper::client::Client<hyper::client::connect::http::HttpConnector, hyper::body::body::Body>`rustc(E0308)
main.rs(68, 18): `match` arms have incompatible types
main.rs(80, 13): this is found to be of type `hyper::client::Client<hyper_proxy::ProxyConnector<hyper::client::connect::http::HttpConnector>, _>`
main.rs(83, 13): expected struct `hyper_proxy::ProxyConnector`, found struct `hyper::client::connect::http::HttpConnector`

rust 的解决方法是什么？

Answer 1

在 yorodm 的支持下，我使用枚举解决了它。我就是这样解决的：-

enum Client {
    Proxy(HyperClient<ProxyConnector<HttpConnector>>),
    Http(HyperClient<HttpConnector>)
}

impl Client {
    pub fn request(&self, mut req: Request<Body>) -> ResponseFuture{
        match self {
            Client::Proxy(client)=>{
                client.request(req)
            }
            Client::Http(client)=>{
                client.request(req)
            }
        }
    }
}

有条件地使用 ProxyConnector 或 HTTPConnector

Conditionally Use ProxyConnector or HTTPConnector

proxy

rust

hyper