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;
 
@@ -30,15 +30,16 @@ fn main() -> Result<()> {
                     let start_line = data.next().ok_or(E::InvalidRequest)?; // should be 500;
                     let mut parts = start_line.split_whitespace().map(ToOwned::to_owned);
                     let method = parts.next().ok_or(E::InvalidRequest)?;
-                    let path = parts.next().ok_or(E::InvalidRequest)?;
-                    let ver = parts.next().ok_or(E::InvalidRequest)?;
+                    let path   = parts.next().ok_or(E::InvalidRequest)?;
+                    let ver    = parts.next().ok_or(E::InvalidRequest)?;
 
                     (method, path, ver)
                 };
 
                 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,
                 };