make shortlinks case insensitive

src/main.rs

@@ -46,6 +46,7 @@ async fn process_socket(mut socket: BufStream<TcpStream>, urlmap: Arc<HashMap<St
         simple_response(socket, ResponseCode::BadRequest).await;
         return;
     };
+    let path = path.to_lowercase();
 
     if http_method != "GET" {
         println!("process_request: forbidden method");
@@ -53,7 +54,7 @@ async fn process_socket(mut socket: BufStream<TcpStream>, urlmap: Arc<HashMap<St
         return;
     }
 
-    let Some(location) = urlmap.get(path) else {
+    let Some(location) = urlmap.get(&path) else {
         println!("process_request: not found");
         simple_response(socket, ResponseCode::NotFound).await;
         return;
@@ -114,7 +115,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
             Err(format!("Unable to parse line: '{}'", url_pair))?
         };
 
-        urlmap.insert(slug.to_string(), redirect.to_string());
+        urlmap.insert(slug.to_lowercase(), redirect.to_string());
     }
 
     let urlmap = Arc::new(urlmap);