I wrote a simple tcp server/client connection that client passes username and pwd to server to get verification. I set the ip address to 127.0.0.1 and port to 8080 on both server and client. The code works on a Windows machine but cannot finish the username and pwd verification on Mac. Here is the server.java code:
public class TcpServer {
public static void main(String[] args) throws IOException {
ServerSocket serverSocket = new ServerSocket(8080);
System.out.println("starting the server...");
while(true){
Socket socket = serverSocket.accept();
new Thread(new Runnable() {
@Override
public void run() {
try{
InputStream inputStream = socket.getInputStream();
byte[] bytes = new byte[1024];
int len=inputStream.read(bytes);
String text= new String(bytes,0,len);
String[] split = text.split("&");
String username = split[0].split("=")[1];
String pwd = split[1].split("=")[1];
OutputStream outputStream = socket.getOutputStream();
if(("mayikt").equals(username)&&"123456".equals(pwd)){
outputStream.write("ok".getBytes(StandardCharsets.UTF_8));
}else{
outputStream.write("failed".getBytes(StandardCharsets.UTF_8));
}
inputStream.close();
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}).start();
}
}
}
and here is the client's code:
public class TcpClient {
public static void main(String[] args) throws IOException {
while(true){
Scanner scanner = new Scanner(System.in);
System.out.println("Please enter username: ");
String username = scanner.nextLine();
System.out.println("Please enter password: ");
String pwd = scanner.nextLine();
Socket socket = new Socket("127.0.0.1", 8080);
OutputStream outputStream = socket.getOutputStream();
String text ="userName="+username+"&userPwd="+pwd;
outputStream.write(text.getBytes(StandardCharsets.UTF_8));
InputStream inputStream = socket.getInputStream();
byte[] bytes = new byte[1024];
int len = inputStream.read(bytes);
if("ok".equals(len)){
System.out.println("login successfully");
}else{
System.out.println("failed to login");
}
outputStream.close();
socket.close();
}
}
}
the client just kept getting failed to login message even though I put correct username and password as the inputs.
The issue is with this line in the client code:
if("ok".equals(len)){
This should be checking if ("ok".equals(new String(bytes,0,len)), since len is the length of the received bytes. Fixing this line should resolve the issue.