The web server on the pc is in c# In the form1 constructor:
var ws = new WebServer(
request => Task.Run(() => SendResponseAsync(request)),
"http://+:8098/");
ws.Run();
This two methods
public static string GetLocalIPAddress()
{
var host = Dns.GetHostEntry(Dns.GetHostName());
foreach (var ip in host.AddressList)
{
if (ip.AddressFamily == AddressFamily.InterNetwork)
{
return ip.ToString();
}
}
throw new Exception("Local IP Address Not Found!");
}
public void Send(string ipaddress)
{
UdpClient client = new UdpClient();
IPEndPoint ip = new IPEndPoint(IPAddress.Broadcast, 15000);
byte[] bytes = Encoding.ASCII.GetBytes(ipaddress);
client.Send(bytes, bytes.Length, ip);
client.Close();
}
Then in timer tick event interval set to 1000ms
int countsends = 0;
private void timer2_Tick(object sender, EventArgs e)
{
if (countsends == 10)
{
Send(localipadd);
countsends = 0;
}
countsends += 1;
}
And the WebServer class
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.Threading;
namespace Automatic_Record
{
class WebServer
{
private readonly HttpListener _listener = new HttpListener();
private readonly Func<HttpListenerRequest, Task<string>> _responderMethod;
public WebServer(string[] prefixes, Func<HttpListenerRequest, Task<string>> method)
{
try
{
if (!HttpListener.IsSupported)
throw new NotSupportedException(
"Needs Windows XP SP2, Server 2003 or later.");
// URI prefixes are required, for example
// "http://localhost:8080/index/".
if (prefixes == null || prefixes.Length == 0)
throw new ArgumentException("prefixes");
// A responder method is required
if (method == null)
throw new ArgumentException("method");
foreach (string s in prefixes)
_listener.Prefixes.Add(s);
_responderMethod = method;
_listener.Start();
}
catch(AccessViolationException err)
{
string error = err.StackTrace;
}
}
}
On the pc side the c# i'm not getting any errors or exceptions and using break point i can see the pc ip on the network on the router on the method Send on variable ipaddress it's value is 10.0.0.1 i also logged in to my router settings and i saw that the pc is on 10.0.0.1
Now the java side in the android-studio where i'm trying to get the pc ip and to connect to it:
At the top of mainactivity: ( I tried before port 8098 but it didn't work so i tried 15000 but also didn't work still getting timeout message )
private String[] ipaddresses = new String[]{
"http://10.0.0.1:15000/?cmd=nothing"
};
Then a button click method calling from onCreate
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
addListenerOnButton();
currentActivity = this;
initTTS();
}
The addListenerOnButton
public void addListenerOnButton()
{
btnClick = (Button) findViewById(R.id.connecttoserverbutton);
btnClick.setOnClickListener(new OnClickListener()
{
byte[] response = null;
@Override
public void onClick(View arg0)
{
text = (TextView) findViewById(R.id.statusTextView);
Thread t = new Thread(new Runnable()
{
@Override
public void run()
{
for (int i = 0; i < ipaddresses.length; i++)
{
counter = i;
try
{
response = Get(ipaddresses[i]);
}
catch (Exception e)
{
String err = e.toString();
}
if (response!=null)
{
try
{
final String a = new String(response, "UTF-8");
text.post(new Runnable()
{
@Override
public void run()
{
text.setText(a + " Oמ " + ipaddresses[counter]);
}
});
iptouse = ipaddresses[i].substring(0,ipaddresses[i].lastIndexOf("=")+1);
connectedtoipsuccess = true;
Logger.getLogger("MainActivity(inside thread)").info(a);
} catch (UnsupportedEncodingException e)
{
e.printStackTrace();
Logger.getLogger("MainActivity(inside thread)").info("encoding exception");
}
Logger.getLogger("MainActivity(inside thread)").info("test1");
break;
}
else
{
}
}
counter = 0;
if (response == null)
{
text.post(new Runnable()
{
@Override
public void run()
{
text.setText("Connection Failed");
}
});
}
}
});
t.start();
}
});
}
And last the Get method
private byte[] Get(String urlIn)
{
URL url = null;
String urlStr = urlIn;
if (urlIn!=null)
urlStr=urlIn;
try
{
url = new URL(urlStr);
} catch (MalformedURLException e)
{
e.printStackTrace();
return null;
}
HttpURLConnection urlConnection = null;
try
{
urlConnection = (HttpURLConnection) url.openConnection();
InputStream in = new BufferedInputStream(urlConnection.getInputStream());
byte[] buf=new byte[10*1024];
int szRead = in.read(buf);
byte[] bufOut;
if (szRead==10*1024)
{
throw new AndroidRuntimeException("the returned data is bigger than 10*1024.. we don't handle it..");
}
else
{
bufOut = Arrays.copyOf(buf, szRead);
}
return bufOut;
}
catch (IOException e)
{
e.printStackTrace();
return null;
}
finally
{
if (urlConnection!=null)
urlConnection.disconnect();
}
}
My android device is also connected to the same network on the router with wifi i checked on the router settings and i see my device.
I used a break point on the android-studio side inside the Get method. It's getting to the line:
InputStream in = new BufferedInputStream(urlConnection.getInputStream());
Then i click continue and that's it here it's hanging and instead keep going to the next line byte[] buf=new byte[10*1024]; after about 30 seconds it's jumping to: e.printStackTrace();
android.system.ErrnoException: connect failed: ETIMEDOUT (Connection timed out) failed to connect to /10.0.0.1 (port 15000): connect failed: ETIMEDOUT (Connection timed out)
I can't see any exceptions in the logcat.
