(4) Simulation of slow request

src/main.rs

-use std::{
-    fs,
-    io::{prelude::*, BufReader},
-    net::{TcpListener, TcpStream},
-};
+use std::{fs, io::{prelude::*, BufReader}, net::{TcpListener, TcpStream}, thread};
+use std::time::Duration;
+
 fn main() {
     let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
 
@@ -17,6 +15,15 @@ fn handle_connection(mut stream: TcpStream) {
     let buf_reader = BufReader::new(&stream);
     let request_line = buf_reader.lines().next().unwrap().unwrap();
 
+    let (status_line, filename) = match &request_line[..] {
+        "GET / HTTP/1.1" => ("HTTP/1.1 200 OK", "hello.html"),
+        "GET /sleep HTTP/1.1" => {
+            thread::sleep(Duration::from_secs(500));
+            ("HTTP/1.1 200 OK", "hello.html")
+        }
+        _ => ("HTTP/1.1 404 NOT FOUND", "404.html"),
+    };
+
     let (status_line, filename) = if request_line == "GET / HTTP/1.1" {
         ("HTTP/1.1 200 OK", "hello.html")
     } else {