* Move HTTP handling to a dedicated ConnectionHandler (#50)

* * Move HTTP handling logic from TcpServer to a dedicated ConnectionTask class
* Implement virtual thread execution for better scalability
* Add regex-based URI routing to support clean URLs and default to index.html
* Ensure sockets are properly closed

Co-authored-by: Caroline Nordbrandt <caroline_nordbradt@hotmail.com>

* change thrown exception to runtime instead with appropiet message in tcpServer.

---------

Co-authored-by: Caroline Nordbrandt <caroline_nordbradt@hotmail.com>

Author: donne41

src/main/java/org/example/ConnectionHandler.java

@@ -0,0 +1,42 @@
+package org.example;
+
+import org.example.httpparser.HttpParser;
+
+import java.io.IOException;
+import java.net.Socket;
+
+public class ConnectionHandler implements AutoCloseable {
+
+    Socket client;
+    String uri;
+
+    public ConnectionHandler(Socket client) {
+        this.client = client;
+    }
+
+    public void runConnectionHandler() throws IOException {
+        StaticFileHandler sfh = new StaticFileHandler();
+        HttpParser parser = new HttpParser();
+        parser.setReader(client.getInputStream());
+        parser.parseRequest();
+        parser.parseHttp();
+        resolveTargetFile(parser.getUri());
+        sfh.sendGetRequest(client.getOutputStream(), uri);
+    }
+
+    private void resolveTargetFile(String uri) {
+        if (uri.matches("/$")) { //matches(/)
+            this.uri = "index.html";
+        } else if (uri.matches("^(?!.*\\.html$).*$")) {
+            this.uri = uri.concat(".html");
+        } else {
+            this.uri = uri;
+        }
+
+    }
+
+    @Override
+    public void close() throws Exception {
+        client.close();
+    }
+}

src/main/java/org/example/StaticFileHandler.java

@@ -19,6 +19,7 @@ private void handleGetRequest(String uri) throws IOException {
 
         File file = new File(WEB_ROOT, uri);
         fileBytes = Files.readAllBytes(file.toPath());
+
     }
 
     public void sendGetRequest(OutputStream outputStream, String uri) throws IOException{

src/main/java/org/example/TcpServer.java

@@ -19,10 +19,18 @@ public void start() {
             while (true) {
                 Socket clientSocket = serverSocket.accept(); // block
                 System.out.println("Client connected: " + clientSocket.getRemoteSocketAddress());
-                clientSocket.close();
+                Thread.ofVirtual().start(() -> handleClient(clientSocket));
             }
         } catch (IOException e) {
             throw new RuntimeException("Failed to start TCP server", e);
         }
     }
-}
+
+    private void handleClient(Socket client) {
+        try (ConnectionHandler connectionHandler = new ConnectionHandler(client)) {
+            connectionHandler.runConnectionHandler();
+        } catch (Exception e) {
+            throw new RuntimeException("Error handling client connection " + e);
+        }
+    }
+}