我想将Actix-web用作简单的代理服务器,但是当我在流模式下使用大文件时,该服务器发生超时错误,因此只有一小部分文件将被下载。
我真的很困惑,因为它是来自actix-web示例的示例代码!
示例代码:
extern crate actix;
extern crate actix_web;
extern crate env_logger;
extern crate futures;
use actix_web::{
client, middleware, server, App, AsyncResponder, Body, Error, HttpMessage,
HttpRequest, HttpResponse,
};
use futures::{Future, Stream};
/// Stream client request response and then send body to a server response
fn index(_req: &HttpRequest) -> Box<Future<Item = HttpResponse, Error = Error>> {
client::ClientRequest::get("http://127.0.0.1:8081/")
.finish().unwrap()
.send()
.map_err(Error::from) // <- convert SendRequestError to an Error
.and_then(
|resp| resp.body() // <- this is MessageBody type, resolves to complete body
.from_err() // <- convert PayloadError to an Error
.and_then(|body| { // <- we got complete body, now send as server response
Ok(HttpResponse::Ok().body(body))
}))
.responder()
}
/// streaming client request to a streaming server response
fn streaming(_req: &HttpRequest) -> Box<Future<Item = HttpResponse, Error = Error>> {
// send client request
client::ClientRequest::get("https://gemmei.ftp.acc.umu.se/debian-cd/current/amd64/iso-cd/debian-9.7.0-amd64-netinst.iso")
.finish().unwrap()
.send() // <- connect to host and send request
.map_err(Error::from) // <- convert SendRequestError to an Error
.and_then(|resp| { // <- we received client response
Ok(HttpResponse::Ok()
// read one chunk from client response and send this chunk to a server response
// .from_err() converts PayloadError to an Error
.body(Body::Streaming(Box::new(resp.payload().from_err()))))
})
.responder()
}
fn main() {
::std::env::set_var("RUST_LOG", "actix_web=info");
env_logger::init();
let sys = actix::System::new("http-proxy");
server::new(|| {
App::new()
.middleware(middleware::Logger::default())
.resource("/streaming", |r| r.f(streaming))
.resource("/", |r| r.f(index))
}).workers(1)
.bind("127.0.0.1:8080")
.unwrap()
.start();
println!("Started http server: 127.0.0.1:8080");
let _ = sys.run();
}
依赖项:
[dependencies]
env_logger = "0.5"
futures = "0.1"
actix = "0.7"
actix-web = { version="0.7", features=["ssl"] }
日志出现错误
ERROR 2019-02-09T18:10:16Z: actix_web::pipeline: Error occurred during request handling: Timeout while waiting for response
ERROR 2019-02-09T18:10:16Z: actix_web::server::h1: Unhandled error1: Timeout while waiting for response
答案 0 :(得分:0)
您应该串流正文:使用.streaming
代替.body
:
use actix_web::client::Client;
use actix_web::{web, App, Error, HttpResponse, HttpServer};
use futures::future::Future;
fn main() {
HttpServer::new(|| {
App::new()
.data(Client::new())
.route("/", web::to_async(handler))
})
.bind("127.0.0.1:8000")
.expect("Cannot bind to port 8000")
.run()
.expect("Unable to run server");
}
fn handler(client: web::Data<Client>) -> impl Future<Item = HttpResponse, Error = Error> {
client.get("https://gensho.ftp.acc.umu.se/debian-cd/current/amd64/iso-cd/debian-10.0.0-amd64-netinst.iso")
.send()
.map_err(Error::from)
.and_then(|res| {
HttpResponse::build(res.status()).streaming(res)
})
}
对于代理,请注意,the full proxy example已更新为修复issues with the content length header。