我收到来自我使用火箭处理的用户的传入请求并使用尽可能少的资源后，希望使用Hyper 0.11发出客户端请求。如果我无法重用Core或Client，则每次Rocket触发请求时都必须创建它们。每次服务器响应请求时，在高性能环境中这将占用太多资源来创建Core和Client。所以我正在使用State使对象可用于所有“点火”。在Hyper 0.10.13中，它可以工作，但是在带有Tokio的Hyper 0.11中，我收到大量错误消息。
Cargo.toml:
rocket = "0.3.3"
rocket_codegen = "0.3.3"
hyper = "0.11"
futures = "0.1"
tokio-core = "0.1"
主
#![feature(plugin, decl_macro)]
#![plugin(rocket_codegen)]
extern crate futures;
extern crate hyper;
extern crate rocket;
extern crate tokio_core;
use rocket::State;
use hyper::*;
use hyper::header::{ContentLength, ContentType};
use futures::{Future, Stream};
use tokio_core::reactor::Core;
fn main() {
let mut core = Core::new().unwrap();
let client = Client::new(&core.handle());
rocket::ignite()
.mount("/", routes![index])
.manage(client.clone())
.launch();
}
#[post("/", data = "<var>")]
fn index(var: String, client: State<hyper::Client<tokio_core::reactor::Handle>>) -> &'static str {
let json = r#"{"library":"hyper"}"#;
let uri = "http://xxx.xxx.xxx.xxx".parse().unwrap();
let mut req = Request::new(Method::Post, uri);
req.headers_mut().set(ContentType::json());
req.headers_mut().set(ContentLength(json.len() as u64));
req.set_body(json);
let post = client.request(req).and_then(|res| {
//println!("POST: {}", res.status());
res.body().concat2()
});
}
我收到如下错误消息:
error[E0277]: the trait bound `std::rc::Weak<std::cell::RefCell<tokio_core::reactor::Inner>>: std::marker::Send` is not satisfied in `hyper::Client<tokio_core::reactor::Handle>`
--> src/main.rs:23:1
|
23 | / fn index(var: String, client: State<hyper::Client<tokio_core::reactor::Handle>>) -> &'static str {
24 | | let json = r#"{"library":"hyper"}"#;
25 | | let uri = "http://xxx.xxx.xxx.xxx".parse().unwrap();
26 | | let mut req = Request::new(Method::Post, uri);
... |
33 | | });
34 | | }
| |_^ `std::rc::Weak<std::cell::RefCell<tokio_core::reactor::Inner>>` cannot be sent between threads safely
|
= help: within `hyper::Client<tokio_core::reactor::Handle>`, the trait `std::marker::Send` is not implemented for `std::rc::Weak<std::cell::RefCell<tokio_core::reactor::Inner>>`
= note: required because it appears within the type `tokio_core::reactor::Handle`
= note: required because it appears within the type `hyper::Client<tokio_core::reactor::Handle>`
= note: required by `rocket::State`
error[E0277]: the trait bound `std::rc::Weak<std::cell::RefCell<tokio_core::reactor::Inner>>: std::marker::Sync` is not satisfied in `hyper::Client<tokio_core::reactor::Handle>`
--> src/main.rs:23:1
|
23 | / fn index(var: String, client: State<hyper::Client<tokio_core::reactor::Handle>>) -> &'static str {
24 | | let json = r#"{"library":"hyper"}"#;
25 | | let uri = "http://xxx.xxx.xxx.xxx".parse().unwrap();
26 | | let mut req = Request::new(Method::Post, uri);
... |
33 | | });
34 | | }
| |_^ `std::rc::Weak<std::cell::RefCell<tokio_core::reactor::Inner>>` cannot be shared between threads safely
|
= help: within `hyper::Client<tokio_core::reactor::Handle>`, the trait `std::marker::Sync` is not implemented for `std::rc::Weak<std::cell::RefCell<tokio_core::reactor::Inner>>`
= note: required because it appears within the type `tokio_core::reactor::Handle`
= note: required because it appears within the type `hyper::Client<tokio_core::reactor::Handle>`
= note: required by `rocket::State`
error[E0277]: the trait bound `std::rc::Rc<std::cell::RefCell<hyper::client::pool::PoolInner<tokio_proto::util::client_proxy::ClientProxy<tokio_proto::streaming::message::Message<hyper::proto::MessageHead<hyper::proto::RequestLine>, hyper::Body>, tokio_proto::streaming::message::Message<hyper::proto::MessageHead<hyper::proto::RawStatus>, tokio_proto::streaming::body::Body<hyper::Chunk, hyper::Error>>, hyper::Error>>>>: std::marker::Send` is not satisfied in `hyper::Client<tokio_core::reactor::Handle>`
--> src/main.rs:23:1
|
23 | / fn index(var: String, client: State<hyper::Client<tokio_core::reactor::Handle>>) -> &'static str {
24 | | let json = r#"{"library":"hyper"}"#;
25 | | let uri = "http://xxx.xxx.xxx.xxx".parse().unwrap();
26 | | let mut req = Request::new(Method::Post, uri);
... |
33 | | });
34 | | }
| |_^ `std::rc::Rc<std::cell::RefCell<hyper::client::pool::PoolInner<tokio_proto::util::client_proxy::ClientProxy<tokio_proto::streaming::message::Message<hyper::proto::MessageHead<hyper::proto::RequestLine>, hyper::Body>, tokio_proto::streaming::message::Message<hyper::proto::MessageHead<hyper::proto::RawStatus>, tokio_proto::streaming::body::Body<hyper::Chunk, hyper::Error>>, hyper::Error>>>>` cannot be sent between threads safely
|
= help: within `hyper::Client<tokio_core::reactor::Handle>`, the trait `std::marker::Send` is not implemented for `std::rc::Rc<std::cell::RefCell<hyper::client::pool::PoolInner<tokio_proto::util::client_proxy::ClientProxy<tokio_proto::streaming::message::Message<hyper::proto::MessageHead<hyper::proto::RequestLine>, hyper::Body>, tokio_proto::streaming::message::Message<hyper::proto::MessageHead<hyper::proto::RawStatus>, tokio_proto::streaming::body::Body<hyper::Chunk, hyper::Error>>, hyper::Error>>>>`
= note: required because it appears within the type `hyper::client::pool::Pool<tokio_proto::util::client_proxy::ClientProxy<tokio_proto::streaming::message::Message<hyper::proto::MessageHead<hyper::proto::RequestLine>, hyper::Body>, tokio_proto::streaming::message::Message<hyper::proto::MessageHead<hyper::proto::RawStatus>, tokio_proto::streaming::body::Body<hyper::Chunk, hyper::Error>>, hyper::Error>>`
= note: required because it appears within the type `hyper::client::Dispatch<hyper::Body>`
= note: required because it appears within the type `hyper::Client<tokio_core::reactor::Handle>`
= note: required by `rocket::State`
error[E0277]: the trait bound `std::rc::Rc<std::cell::RefCell<hyper::client::pool::PoolInner<std::cell::RefCell<futures::sync::mpsc::Sender<(hyper::proto::MessageHead<hyper::proto::RequestLine>, std::option::Option<hyper::Body>, futures::Sender<std::result::Result<hyper::Response, hyper::Error>>)>>>>>: std::marker::Send` is not satisfied in `hyper::Client<tokio_core::reactor::Handle>`
--> src/main.rs:23:1
|
23 | / fn index(var: String, client: State<hyper::Client<tokio_core::reactor::Handle>>) -> &'static str {
24 | | let json = r#"{"library":"hyper"}"#;
25 | | let uri = "http://xxx.xxx.xxx.xxx".parse().unwrap();
26 | | let mut req = Request::new(Method::Post, uri);
... |
33 | | });
34 | | }
| |_^ `std::rc::Rc<std::cell::RefCell<hyper::client::pool::PoolInner<std::cell::RefCell<futures::sync::mpsc::Sender<(hyper::proto::MessageHead<hyper::proto::RequestLine>, std::option::Option<hyper::Body>, futures::Sender<std::result::Result<hyper::Response, hyper::Error>>)>>>>>` cannot be sent between threads safely
|
= help: within `hyper::Client<tokio_core::reactor::Handle>`, the trait `std::marker::Send` is not implemented for `std::rc::Rc<std::cell::RefCell<hyper::client::pool::PoolInner<std::cell::RefCell<futures::sync::mpsc::Sender<(hyper::proto::MessageHead<hyper::proto::RequestLine>, std::option::Option<hyper::Body>, futures::Sender<std::result::Result<hyper::Response, hyper::Error>>)>>>>>`
= note: required because it appears within the type `hyper::client::pool::Pool<std::cell::RefCell<futures::sync::mpsc::Sender<(hyper::proto::MessageHead<hyper::proto::RequestLine>, std::option::Option<hyper::Body>, futures::Sender<std::result::Result<hyper::Response, hyper::Error>>)>>>`
= note: required because it appears within the type `hyper::client::Dispatch<hyper::Body>`
= note: required because it appears within the type `hyper::Client<tokio_core::reactor::Handle>`
= note: required by `rocket::State`
error[E0277]: the trait bound `std::rc::Rc<std::cell::RefCell<hyper::client::pool::PoolInner<tokio_proto::util::client_proxy::ClientProxy<tokio_proto::streaming::message::Message<hyper::proto::MessageHead<hyper::proto::RequestLine>, hyper::Body>, tokio_proto::streaming::message::Message<hyper::proto::MessageHead<hyper::proto::RawStatus>, tokio_proto::streaming::body::Body<hyper::Chunk, hyper::Error>>, hyper::Error>>>>: std::marker::Sync` is not satisfied in `hyper::Client<tokio_core::reactor::Handle>`
--> src/main.rs:23:1
|
23 | / fn index(var: String, client: State<hyper::Client<tokio_core::reactor::Handle>>) -> &'static str {
24 | | let json = r#"{"library":"hyper"}"#;
25 | | let uri = "http://xxx.xxx.xxx.xxx".parse().unwrap();
26 | | let mut req = Request::new(Method::Post, uri);
... |
33 | | });
34 | | }
| |_^ `std::rc::Rc<std::cell::RefCell<hyper::client::pool::PoolInner<tokio_proto::util::client_proxy::ClientProxy<tokio_proto::streaming::message::Message<hyper::proto::MessageHead<hyper::proto::RequestLine>, hyper::Body>, tokio_proto::streaming::message::Message<hyper::proto::MessageHead<hyper::proto::RawStatus>, tokio_proto::streaming::body::Body<hyper::Chunk, hyper::Error>>, hyper::Error>>>>` cannot be shared between threads safely
|
= help: within `hyper::Client<tokio_core::reactor::Handle>`, the trait `std::marker::Sync` is not implemented for `std::rc::Rc<std::cell::RefCell<hyper::client::pool::PoolInner<tokio_proto::util::client_proxy::ClientProxy<tokio_proto::streaming::message::Message<hyper::proto::MessageHead<hyper::proto::RequestLine>, hyper::Body>, tokio_proto::streaming::message::Message<hyper::proto::MessageHead<hyper::proto::RawStatus>, tokio_proto::streaming::body::Body<hyper::Chunk, hyper::Error>>, hyper::Error>>>>`
= note: required because it appears within the type `hyper::client::pool::Pool<tokio_proto::util::client_proxy::ClientProxy<tokio_proto::streaming::message::Message<hyper::proto::MessageHead<hyper::proto::RequestLine>, hyper::Body>, tokio_proto::streaming::message::Message<hyper::proto::MessageHead<hyper::proto::RawStatus>, tokio_proto::streaming::body::Body<hyper::Chunk, hyper::Error>>, hyper::Error>>`
= note: required because it appears within the type `hyper::client::Dispatch<hyper::Body>`
= note: required because it appears within the type `hyper::Client<tokio_core::reactor::Handle>`
= note: required by `rocket::State`
error[E0277]: the trait bound `std::rc::Rc<std::cell::RefCell<hyper::client::pool::PoolInner<std::cell::RefCell<futures::sync::mpsc::Sender<(hyper::proto::MessageHead<hyper::proto::RequestLine>, std::option::Option<hyper::Body>, futures::Sender<std::result::Result<hyper::Response, hyper::Error>>)>>>>>: std::marker::Sync` is not satisfied in `hyper::Client<tokio_core::reactor::Handle>`
--> src/main.rs:23:1
|
23 | / fn index(var: String, client: State<hyper::Client<tokio_core::reactor::Handle>>) -> &'static str {
24 | | let json = r#"{"library":"hyper"}"#;
25 | | let uri = "http://xxx.xxx.xxx.xxx".parse().unwrap();
26 | | let mut req = Request::new(Method::Post, uri);
... |
33 | | });
34 | | }
| |_^ `std::rc::Rc<std::cell::RefCell<hyper::client::pool::PoolInner<std::cell::RefCell<futures::sync::mpsc::Sender<(hyper::proto::MessageHead<hyper::proto::RequestLine>, std::option::Option<hyper::Body>, futures::Sender<std::result::Result<hyper::Response, hyper::Error>>)>>>>>` cannot be shared between threads safely
|
= help: within `hyper::Client<tokio_core::reactor::Handle>`, the trait `std::marker::Sync` is not implemented for `std::rc::Rc<std::cell::RefCell<hyper::client::pool::PoolInner<std::cell::RefCell<futures::sync::mpsc::Sender<(hyper::proto::MessageHead<hyper::proto::RequestLine>, std::option::Option<hyper::Body>, futures::Sender<std::result::Result<hyper::Response, hyper::Error>>)>>>>>`
= note: required because it appears within the type `hyper::client::pool::Pool<std::cell::RefCell<futures::sync::mpsc::Sender<(hyper::proto::MessageHead<hyper::proto::RequestLine>, std::option::Option<hyper::Body>, futures::Sender<std::result::Result<hyper::Response, hyper::Error>>)>>>`
= note: required because it appears within the type `hyper::client::Dispatch<hyper::Body>`
= note: required because it appears within the type `hyper::Client<tokio_core::reactor::Handle>`
= note: required by `rocket::State`
我的状态有问题吗？请不要花费太多的精力来寻找答案。如果您能指出正确的方向，我就可以自己工作。同样非常欢迎使用另一种解决方案来解决此问题的另一种解决方案。
最佳答案
不，您不能在线程之间共享hyper::Client。但是，您可以共享tokio_core Remote :
#![feature(plugin, decl_macro)]
#![plugin(rocket_codegen)]
extern crate futures;
extern crate hyper;
extern crate rocket;
extern crate tokio_core;
use rocket::State;
use futures::{Future, Stream};
use tokio_core::reactor::Core;
fn main() {
let core = Core::new().unwrap();
rocket::ignite()
.mount("/", routes![index])
.manage(core.remote())
.launch();
}
#[post("/", data = "<var>")]
fn index(var: String, remote: State<tokio_core::reactor::Remote>) -> String {
remote.spawn(|handle| {
use hyper::{Client, Request, Method};
use hyper::header::{ContentLength, ContentType};
let client = Client::new(handle);
let json = r#"{"library":"hyper"}"#;
let uri = "http://xxx.xxx.xxx.xxx".parse().unwrap();
let mut req = Request::new(Method::Post, uri);
req.headers_mut().set(ContentType::json());
req.headers_mut().set(ContentLength(json.len() as u64));
req.set_body(json);
client.request(req)
.and_then(|res| res.body().concat2())
.map(|_| ())
.map_err(|_| ())
});
var
}
然后问题转向您的其他主张:
我不确定您会基于这样的决定。 Constructing a
Client doesn't do much。关于rust - 我可以在Rocket中重用Tokio Core和Hyper Client吗？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/47542326/