56 lines
1.9 KiB
Rust
56 lines
1.9 KiB
Rust
#![deny(warnings)]
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extern crate hyper;
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extern crate pretty_env_logger;
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extern crate serde_json;
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use std::sync::{Arc, atomic::{AtomicUsize, Ordering}};
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use hyper::{Body, Response, Server};
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use hyper::service::service_fn_ok;
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use hyper::rt::{self, Future};
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fn main() {
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pretty_env_logger::init();
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let addr = ([127, 0, 0, 1], 3000).into();
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// For the most basic of state, we just share a counter, that increments
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// with each request, and we send its value back in the response.
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let counter = Arc::new(AtomicUsize::new(0));
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// new_service is run for each connection, creating a 'service'
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// to handle requests for that specific connection.
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let new_service = move || {
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// While the state was moved into the new_service closure,
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// we need to clone it here because this closure is called
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// once for every connection.
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//
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// Each connection could send multiple requests, so
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// the `Service` needs a clone to handle later requests.
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let counter = counter.clone();
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// This is the `Service` that will handle the connection.
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// `service_fn_ok` is a helper to convert a function that
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// returns a Response into a `Service`.
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//
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// If you wanted to return a `Future` of a `Response`, such as because
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// you wish to load data from a database or do other things, you
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// could change this to `service_fn` instead.
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service_fn_ok(move |_req| {
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// Get the current count, and also increment by 1, in a single
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// atomic operation.
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let count = counter.fetch_add(1, Ordering::AcqRel);
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Response::new(Body::from(format!("Request #{}", count)))
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})
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};
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let server = Server::bind(&addr)
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.serve(new_service)
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.map_err(|e| eprintln!("server error: {}", e));
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println!("Listening on http://{}", addr);
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rt::run(server);
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}
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