add iron

iron/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "iron"
+version = "0.1.0"
+authors = ["Hatter Jiang <jht5945@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+iron = "0.6.1"
+time = "0.2.6"

iron/src/main.rs

@@ -0,0 +1,38 @@
+use iron::prelude::*;
+use iron::{BeforeMiddleware, AfterMiddleware, typemap};
+use std::time::SystemTime;
+
+struct ResponseTime;
+
+impl typemap::Key for ResponseTime { type Value = u128; }
+
+impl BeforeMiddleware for ResponseTime {
+    fn before(&self, req: &mut Request) -> IronResult<()> {
+       req.extensions.insert::<ResponseTime>(get_time_in_nanos());
+        Ok(())
+    }
+}
+
+impl AfterMiddleware for ResponseTime {
+    fn after(&self, req: &mut Request, res: Response) -> IronResult<Response> {
+        let delta = get_time_in_nanos() - *req.extensions.get::<ResponseTime>().unwrap();
+        println!("Request: {}, took: {} ms", req.url, (delta as f64) / 1000000.0);
+        Ok(res)
+    }
+}
+
+fn get_time_in_nanos() -> u128 {
+    SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap().as_nanos()
+}
+
+fn hello_world(_: &mut Request) -> IronResult<Response> {
+    Ok(Response::with((iron::status::Ok, "Hello World\n")))
+}
+
+fn main() {
+    let mut chain = Chain::new(hello_world);
+    chain.link_before(ResponseTime);
+    chain.link_after(ResponseTime);
+    println!("Listen on: 127.0.0.1:8080");
+    Iron::new(chain).http("127.0.0.1:8080").unwrap();
+}