如何停止超级HTTP Web服务器并返回错误? [英] How can I stop the hyper HTTP web server and return an error?
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问题描述
超级箱子的文档有一个简单的示例来启动网站服务器:
The docs for the hyper crate have a simple example to start a web server:
extern crate hyper;
use hyper::service::service_fn_ok;
use hyper::{Body, Response, Server};
fn main() {
// Construct our SocketAddr to listen on...
let addr = ([127, 0, 0, 1], 3000).into();
// And a NewService to handle each connection...
let new_service = || service_fn_ok(|_req| Response::new(Body::from("Hello World")));
// Then bind and serve...
let server = Server::bind(&addr).serve(new_service);
// Finally, spawn `server` onto an Executor...
hyper::rt::run(server.map_err(|e| {
eprintln!("server error: {}", e);
}));
}
我想将此Web服务器嵌入返回错误的过程中:
I want to embed this web server in a procedure that returns an error:
// Executes a web server. Returns a result object with an error object
// if the server stopped unexpectedly
fn run_and_stop_web_server(addr: std::net::SocketAddr) -> Result<(), Error> {
let server_builder = Server::try_bind(&addr)?;
let server = server_builder.serve(move || {
let handler: Handler = Handler::new();
hyper::service::service_fn(move |req| handler.serve(req))
});
// Run the server
// HERE: I don't know how to handle the error so I can return it from
// the run_and_stop_web_server() function
hyper::rt::run(server.map_err(|e| eprintln!("Ignored Server error: {}", e)));
Result::Ok(())
}
我不知道如何处理该错误.我要使用run_and_stop_web_server
函数返回错误,而不是使用eprintln!()
.
I don't know how I can handle the error. Instead of using eprintln!()
I want to return the error from the run_and_stop_web_server
function.
推荐答案
我相信我找到了直接使用tokio运行时的解决方案...它可以编译.请任何人告诉我我是否错在这里.
I believe I found a solution using the tokio runtime directly... It compiles. Please anyone tell me if I'm wrong here.
这个想法是使用tokio 运行时直接(文档有很多示例):
The idea is to use the tokio Runtime directly (docs have many examples):
use tokio::runtime::Runtime;
// Executes a web server. Returns a result object with an error object
// if the server stopped unexpectedly
fn run_and_stop_web_server(addr: std::net::SocketAddr) -> Result<(), Error> {
let server_builder = Server::try_bind(&addr)?;
let server = server_builder.serve(move || {
let handler: Handler = Handler::new();
hyper::service::service_fn(move |req| handler.serve(req))
});
let mut rt = Runtime::new()?;
rt.block_on(server)?;
rt.shutdown_now();
Result::Ok(())
}
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