Rust 东京回声服务器。不能在同一将来读写
我正试图在东京建立一个回声服务器。我看过一些例子,但它们似乎都使用了Tokio io的Rust 东京回声服务器。不能在同一将来读写,rust,future,rust-tokio,Rust,Future,Rust Tokio,我正试图在东京建立一个回声服务器。我看过一些例子,但它们似乎都使用了Tokio io的io::copy,我不能使用,因为我想修改输出 但是,我无法编译同时使用writer和reader的服务器。我想构建一个基于未来的任务,它支持在循环中读/写(echo服务器) 我的实际代码是: extern crate futures; extern crate futures_cpupool; extern crate tokio; extern crate tokio_io; use futures::p
io::copy
,我不能使用,因为我想修改输出
但是,我无法编译同时使用writer
和reader
的服务器。我想构建一个基于未来的任务,它支持在循环中读/写(echo服务器)
我的实际代码是:
extern crate futures;
extern crate futures_cpupool;
extern crate tokio;
extern crate tokio_io;
use futures::prelude::*;
use futures_cpupool::CpuPool;
use tokio_io::AsyncRead;
use futures::Stream;
use futures::stream;
use tokio_io::codec::*;
use std::rc::Rc;
fn main() {
let pool = CpuPool::new_num_cpus();
use std::net::*;
let socket = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
let listener = tokio::net::TcpListener::bind(&socket).unwrap();
let server = listener.incoming().for_each(|socket| {
let (writer, reader) = socket.framed(LinesCodec::new()).split();
let writer = Rc::new(writer);
let action = reader.for_each(|line| {
println!("ECHO: {}", line);
writer.send(line);
Ok(())
});
pool.spawn(action); // std::rc::Rc<futures::stream::SplitSink<tokio_io::codec::Framed<tokio::net::TcpStream, tokio_io::codec::LinesCodec>>>` cannot be shared between threads safely
Ok(())
});
server.wait().unwrap();
}
它说的错误是:
无法移出借用的内容
我终于发现转发
是我问题的答案
extern crate tokio;
extern crate tokio_io;
extern crate futures;
use futures::prelude::*;
use tokio_io::AsyncRead;
use futures::Stream;
use tokio_io::codec::*;
struct Cancellable{
rx: std::sync::mpsc::Receiver<()>,
}
impl Future for Cancellable {
type Item = ();
type Error = std::sync::mpsc::RecvError;
fn poll(&mut self) -> Result<Async<Self::Item>,Self::Error> {
match self.rx.try_recv() {
Ok(_) => Ok(Async::Ready(())),
Err(_) => Ok(Async::NotReady)
}
}
}
fn main() {
use std::net::*;
let socket = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
let listener = tokio::net::TcpListener::bind(&socket).unwrap();
let server = listener.incoming().for_each(|socket|{
let (writer,reader) = socket.framed(LinesCodec::new()).split();
let (tx,rx) = std::sync::mpsc::channel();
let cancel = Cancellable {
rx: rx,
};
let action = reader
.map(move |line|{
println!("ECHO: {}",line);
if line == "bye"{
println!("BYE");
tx.send(()).unwrap();
}
line
})
.forward(writer)
.select2(cancel)
.map(|_|{
})
.map_err(|err|{
println!("error");
});
tokio::executor::current_thread::spawn(action);
Ok(())
}).map_err(|err|{
println!("error = {:?}",err);
});
tokio::executor::current_thread::run(|_|{
tokio::executor::current_thread::spawn(server);
});
}
extern板条箱东京;
外部板条箱东京;
外部板条箱期货;
使用期货::前奏::*;
使用tokio_io::AsyncRead;
使用流;
使用tokio_io::编解码器::*;
结构可取消{
接收:标准::同步::mpsc::接收机,
}
可取消的impl未来{
类型项=();
类型错误=std::sync::mpsc::RecvError;
fn轮询(&mut self)->结果{
匹配self.rx.try_recv(){
Ok()=>Ok(异步::就绪(()),
Err()=>Ok(异步::NotReady)
}
}
}
fn main(){
使用std::net::*;
让socket=SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127,0,0,1)),8080);
让listener=tokio::net::TcpListener::bind(&socket).unwrap();
对于每个(|套接字),让server=listener.incoming()|{
let(writer,reader)=socket.framed(LinesCodec::new()).split();
let(tx,rx)=std::sync::mpsc::channel();
让取消=可取消{
rx:rx,
};
让行动=读取器
.地图(移动|线|{
println!(“ECHO:{}”,行);
如果行==“再见”{
println!(“再见”);
tx.send(()).unwrap();
}
线
})
.转发(作者)
。选择2(取消)
.地图(|_|{
})
.map_err(| err|{
println!(“错误”);
});
tokio::executor::current_thread::spawn(操作);
好(())
}).map_err(| err|{
println!(“error={:?}”,err);
});
tokio::executor::当前线程::运行(|_|{
tokio::executor::current_thread::spawn(服务器);
});
}
我很确定编译器不会只输出“错误”。请包含完整的错误消息。错误代码:std::rc::rc`无法在线程之间安全共享。但是,使用Arc无法解决问题:writer.send(line);-^^^无法移出借用的内容。请编辑您的问题并添加错误消息和其他信息。在注释中不要这样做。我正在尝试构建一个echo服务器[…]我想修改输出-修改输入似乎与echo服务器的功能完全相反。
extern crate tokio;
extern crate tokio_io;
extern crate futures;
use futures::prelude::*;
use tokio_io::AsyncRead;
use futures::Stream;
use tokio_io::codec::*;
struct Cancellable{
rx: std::sync::mpsc::Receiver<()>,
}
impl Future for Cancellable {
type Item = ();
type Error = std::sync::mpsc::RecvError;
fn poll(&mut self) -> Result<Async<Self::Item>,Self::Error> {
match self.rx.try_recv() {
Ok(_) => Ok(Async::Ready(())),
Err(_) => Ok(Async::NotReady)
}
}
}
fn main() {
use std::net::*;
let socket = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
let listener = tokio::net::TcpListener::bind(&socket).unwrap();
let server = listener.incoming().for_each(|socket|{
let (writer,reader) = socket.framed(LinesCodec::new()).split();
let (tx,rx) = std::sync::mpsc::channel();
let cancel = Cancellable {
rx: rx,
};
let action = reader
.map(move |line|{
println!("ECHO: {}",line);
if line == "bye"{
println!("BYE");
tx.send(()).unwrap();
}
line
})
.forward(writer)
.select2(cancel)
.map(|_|{
})
.map_err(|err|{
println!("error");
});
tokio::executor::current_thread::spawn(action);
Ok(())
}).map_err(|err|{
println!("error = {:?}",err);
});
tokio::executor::current_thread::run(|_|{
tokio::executor::current_thread::spawn(server);
});
}