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better FnNewService definition

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This commit is contained in:
Nikolay Kim
2018-08-21 20:42:43 -07:00
parent b8c8dbc90a
commit 0f8cd0f44d
2 changed files with 13 additions and 17 deletions
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12
examples/basic.rs
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@ -68,19 +68,13 @@ fn main() {
SslAcceptorExt::accept_async(&acceptor, stream)
.map_err(|e| io::Error::new(io::ErrorKind::Other, e))
})
// convert closure to a `NewService` and convert init error
.into_new_service().map_init_err(|_| io::Error::new(io::ErrorKind::Other, ""))
// convert closure to a `NewService`
.into_new_service()
// .and_then() combinator uses other service to convert incoming `Request` to a `Response`
// and then uses that response as an input for next service.
// in this case, on success we use `logger` service
.and_then(
// convert function to a Service and related NewService impl
logger.into_new_service()
// if service is a function actix-net generate NewService impl with InitError=(),
// but actix_net::Server requires io::Error as InitError,
// we need to convert it to a `io::Error`
.map_init_err(|_| io::Error::new(io::ErrorKind::Other, "")))
.and_then(logger)
// next service uses two components, service state and service function
// actix-net generates `NewService` impl that creates `ServiceState` instance for each new service