fix: netutil clear socket read

Author: jarad0628

connectors-common/connector-core/src/main/java/io/tapdata/util/NetUtil.java

@@ -2,7 +2,7 @@
 
 import io.tapdata.kit.EmptyKit;
 
-import java.io.*;
+import java.io.IOException;
 import java.net.InetSocketAddress;
 import java.net.Socket;
 
@@ -30,24 +30,9 @@ public static void validateHostPortWithSocket(String host, int port, int timeout
             throw new IllegalArgumentException("Port must greater than 0 and smaller then 65536");
         timeoutMs = timeoutMs <= 1000 ? DEFAULT_SOCKET_TIMEOUT_MS : timeoutMs;
         try (Socket s = new Socket()) {
-            if (port == 0) {
-                return;
-            } else {
+            if (port > 0) {
                 s.connect(new InetSocketAddress(host, port), timeoutMs);
             }
-            s.setSoTimeout(3000);
-            try (
-                    InputStream in = s.getInputStream();
-                    OutputStream out = s.getOutputStream()
-            ) {
-                String request = "GET / HTTP/1.1\r\nHost: " + host + "\r\n\r\n";
-                out.write(request.getBytes());
-                out.flush();
-
-                try (BufferedReader reader = new BufferedReader(new InputStreamReader(in))) {
-                    reader.readLine();
-                }
-            }
         } catch (IOException e) {
             throw new IOException("Unable connect to " + host + ":" + port + ", reason: " + e.getMessage(), e);
         }