Using nanohttpd works perfect for me.
Just define the dependecies:
implementation group: 'org.nanohttpd', name: 'nanohttpd', version: '2.3.1'
Create a derived class and add code to parse and create json data.
public class Nano extends NanoHTTPD {
private static final String TAG = "Nano";
MonitorActivity activity; // My Activity
public Nano(MonitorActivity activity, int port) throws IOException {
super(port);
this.activity = activity;
start(NanoHTTPD.SOCKET_READ_TIMEOUT, true);
System.out.println("\nRunning! Point your browsers to http://localhost:" + port + "/ \n");
}
@Override
public NanoHTTPD.Response serve(IHTTPSession session) {
JSONObject object = new JSONObject();
try {
Map<String, String> files = new HashMap<String, String>();
Method method = session.getMethod();
if (Method.PUT.equals(method) || Method.POST.equals(method)) {
try {
session.parseBody(files);
} catch (IOException ioe) {
ioe.printStackTrace();
} catch (ResponseException re) {
re.printStackTrace();
}
}
if (session.getParameters().get("MsgType").get(0) == null) {
object.put("Result", "Missing MsgType");
Log.v(TAG, "Missing MsgType");
} else {
if (session.getParameters().get("Msg").get(0) == null) {
object.put("Result", "Missing Msg");
Log.v(TAG, "Missing Msg");
} else {
Log.v(TAG, session.getParameters().get("Msg").get(0));
JSONObject result = ProcessClockface.Request(activity, session.getParameters().get("MsgType").get(0), session.getParameters().get("Msg").get(0));
if(result != null)
object.put("Result", result);
else
object.put("Result", "Errors processing data!");
}
}
} catch (JSONException e) {
e.printStackTrace();
}
return newFixedLengthResponse(object.toString());
}
}In your activity start and stop the server
// onCreate:
try {
nano = new Nano(this, port);
} catch (Exception e) {
e.printStackTrace();
}
// onDestroy:
nano.stop();
In the companion using fetch and submit data via post:
function sendData_via_POST(type, data) {
var formData = new FormData();
formData.append('MsgType', type);
formData.append('Msg', JSON.stringify(data));
fetch(CONST.END_POINT_LOCALHOST, {
method: 'POST',
body: formData
}).then(res => res.json())
.catch(error => console.error('Error: ' + error))
.then(response => console.log('Success: ' + JSON.stringify(response)));
};This works for me, without any problems.
