stage 4 attempt 2

src/main.rs

@@ -1,6 +1,6 @@
-#![feature(if_let_guard)]
+// #![feature(if_let_guard)]
 
-use std::{ fmt::Display, io::{ BufRead, BufReader, Write }, net::TcpListener };
+use std::{ io::{ BufRead, BufReader, Write }, net::TcpListener };
 use anyhow::Result;
 use thiserror::Error;
 
@@ -38,7 +38,8 @@ fn main() -> Result<()> {
 
                 let response = match path.as_str() {
                     "/" => Response::Empty,
-                    p if let Some(echo) = p.strip_prefix("/echo/") => Response::TextPlain(echo),
+                    // p if let Some(echo) = p.strip_prefix("/echo/") => Response::TextPlain(echo), // a nicer way to do that, not available in stable yet
+                    p if p.starts_with("/echo/") => Response::TextPlain(p.trim_start_matches("/echo/")),
                     _ => Response::_404,
                 };