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Add ResponseError impl for SendRequestError

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This commit is contained in:
Nikolay Kim
2018-03-05 13:02:31 -08:00
parent ea2a8f6908
commit b282ec106e
3 changed files with 52 additions and 17 deletions
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46
examples/http-proxy/src/main.rs
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@ -4,40 +4,52 @@ extern crate futures;
extern crate env_logger;
use actix_web::*;
use futures::Future;
use futures::future::{ok, err, Either};
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("https://www.rust-lang.org/en-US/")
.finish().unwrap()
.send()
.map_err(|e| error::Error::from(error::ErrorInternalServerError(e)))
.then(|result| match result {
Ok(resp) => {
Either::A(resp.body().from_err().and_then(|body| {
match httpcodes::HttpOk.build().body(body) {
Ok(resp) => ok(resp),
Err(e) => err(e.into()),
}
.map_err(error::Error::from) // <- convert SendRequestError to an Error
.and_then(
|resp| resp.body() // <- this is MessageBody type, resolves to complete body
.from_err() // <- convet PayloadError to a Error
.and_then(|body| { // <- we got complete body, now send as server response
httpcodes::HttpOk.build()
.body(body)
.map_err(error::Error::from)
}))
},
Err(e) => {
Either::B(err(error::Error::from(e)))
}
.responder()
}
/// stream client request to a server response
fn streaming(_req: HttpRequest) -> Box<Future<Item=HttpResponse, Error=Error>> {
// send client request
client::ClientRequest::get("https://www.rust-lang.org/en-US/")
.finish().unwrap()
.send() // <- connect to host and send request
.map_err(error::Error::from) // <- convert SendRequestError to an Error
.and_then(|resp| { // <- we received client response
httpcodes::HttpOk.build()
// read one chunk from client response and send this chunk to a server response
// .from_err() converts PayloadError to a Error
.body(Body::Streaming(Box::new(resp.from_err())))
.map_err(|e| e.into()) // HttpOk::build() mayb return HttpError, we need to convert it to a Error
})
.responder()
}
fn main() {
::std::env::set_var("RUST_LOG", "actix_web=info");
let _ = env_logger::init();
let sys = actix::System::new("ws-example");
env_logger::init();
let sys = actix::System::new("http-proxy");
let _addr = HttpServer::new(
|| Application::new()
// enable logger
.middleware(middleware::Logger::default())
.resource("/streaming", |r| r.f(streaming))
.resource("/", |r| r.f(index)))
.bind("127.0.0.1:8080").unwrap()
.start();