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Certificate error when using tech.gusavila92.websocketclient.WebSocketClient

I am creating an Android App which I want to connect to my server running secure websockets (wss). My code to connect is as below:
private void createWebSocketClient() {
URI uri;
try {
// Connect to local host
uri = new URI("wss://mysocketsdomain:8080/ws");
}
catch (URISyntaxException e) {
Log.d("Connection", "I am not even connecting");
e.printStackTrace();
return;
}
webSocketClient = new WebSocketClient(uri) {
#Override
public void onOpen() {
Log.i("WebSocket", "Session is starting");
webSocketClient.send("Hello World!");
}
#Override
public void onTextReceived(String s) {
Log.i("WebSocket", "Message received");
final String message = s;
runOnUiThread(new Runnable() {
#Override
public void run() {
try{
//TextView textView = findViewById(R.id.mainText);
//textView.setText(message);
} catch (Exception e){
e.printStackTrace();
}
}
});
}
#Override
public void onBinaryReceived(byte[] data) {
}
#Override
public void onPingReceived(byte[] data) {
}
#Override
public void onPongReceived(byte[] data) {
}
#Override
public void onException(Exception e) {
System.out.println(e.getMessage());
}
#Override
public void onCloseReceived() {
Log.i("WebSocket", "Closed ");
System.out.println("onCloseReceived");
}
};
webSocketClient.setConnectTimeout(10000);
webSocketClient.setReadTimeout(60000);
webSocketClient.enableAutomaticReconnection(5000);
webSocketClient.connect();
}
I am getting the error below:
java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.
The connection works fine if I visit the web front end from a browser and I can see that the certificate is valid from the padlock symbol. Also, the frontend web app that I developed using Svelte in JavaScript works fine.
Can anyone advise what I need to do? I am reading a lot of confusing information online. Some things suggest that I need to create a trusted certificate store in the Android app. Another thing that I saw suggested it is a problem with the server certificate chain. I set the server to use the certificate file containing the chain, but the error still happens. I am not sure if it would be the server when it works for the JavaScript app and the web front end.

try upgrade WeSocketClient library:
implementation 'tech.gusavila92:java-android-websocket-client:1.2.0'

Retrofit Task (Execute) Called from another function doesn't wait until Task finish

From my Login Activity (First Activity Opened) I always do a check if the token is still active on my server which is done through Async Task that does API call to server.
here's the code from LoginActivity :
private void checkIfAuthenticated(){
SharedPreferences reader_auth = getSharedPreferences(getString(R.string.auth_preferences), MODE_PRIVATE);
String auth_key = reader_auth.getString(getString(R.string.auth_access_key),null);
String mobile_token = reader_auth.getString(getString(R.string.auth_mobile_token),null);
if (auth_key != null) {
//THIS PART RUNS THE TOKEN CHECK TO SERVER
authGlobal = new AuthenticationGlobal(this);
// I WANT THIS FUNCTION TO FINISH FIRST BEFORE IT GOES TO THE NEXT PART OF THE CODE
authGlobal.runAuthenticationCheck(auth_key,mobile_token);
String Auth_Key = reader_auth.getString(getString(R.string.auth_access_key),null);
Log.d("Auth Key Check 0",Auth_Key);
if (Auth_Key != null) {
Log.d("Auth Key Check 1",Auth_Key);
MoveToDashboardActivity();
}
}
}
The runAuthenticationCheck(String,String) Code is located on another class (Because it was meant to be a global function which can be called from any function on any activity)
runAuthenticationCheck is located in AuthenticationGlobal Class, here's the code :
public void runAuthenticationCheck (String mobile_token, String Access_token) {
checkAuthTask = new checkAuthenticationTask(mobile_token, Access_token);
checkAuthTask.execute((Void) null);
}
public class checkAuthenticationTask extends AsyncTask<Void, Void, Boolean> {
private GetDataService service;
private String mobile_token;
private String access_token;
checkAuthenticationTask( String Access_token,String Mobile_token) {
/*Create handle for the RetrofitInstance interface*/
mobile_token = Mobile_token;
access_token = Access_token;
service = RetrofitClientInstance.getRetrofitInstance().create(GetDataService.class);
}
#Override
protected Boolean doInBackground(Void... params) {
// TODO: attempt authentication against a network service.
try {
Call<CheckAuthenticationResponse> call = service.checkAuthentication(access_token,mobile_token);
Response<CheckAuthenticationResponse> CheckAuthenticationResponse = call.execute();
if (CheckAuthenticationResponse.code() == 200){
} else{
//clear shared preferences
clearAuthentication();
Log.e("AuthKey Global","Expired0");
}
} catch (IOException ea) {
clearAuthentication();
Log.e("AuthKey Global","Expired1");
Log.e("AuthenticationResponseError Global","Network Went Wrong");
ea.printStackTrace();
}
return true;
}
#Override
protected void onPostExecute(final Boolean success) {
//mAuthTask = null;
//showProgress(false);
if (success) {
Log.e("AuthKey Global","Done");
} else {
// mPasswordView.setError(getString(R.string.error_incorrect_password));
clearAuthentication();
Log.e("AuthKey Global","Expired2");
}
}
#Override
protected void onCancelled() {
//mAuthTask = null;
//showProgress(false);
}
There are 2 Class / Activity : "LoginActivity" and "AuthenticationGlobal".
There are 3 Function :
checkIfAuthenticated => located in LoginActivity, Which in turn actually call another function from another class (Function number 2 : "runAuthenticationCheck")
runAuthenticationCheck => located in AuthenticationGlobal. which in calls a AsyncTask via .execute(...) command.
checkAuthenticationTask => located in AuthenticationGlobal. Which actually does the API Call to server.
From "LoginActivity" I run a function "checkIfAuthenticated" => which calls function "runAuthenticationCheck" located at "AuthenticationGlobal" => which runs a Task "checkAuthenticationTask" which does API Call to server and does stuff.
The problem is, when I called the first Function, the code doesn't wait until the function "checkIfAuthenticated" / "checkAuthenticationTask" is done. Is there a way for me to make the app wait until the task / function finish first??
Thank you
UPDATE :
I ONLY NEED TO ADD .get() at the end of .execute() and wrap it inside try catch.
public void runAuthenticationCheck (String mobile_token, String Access_token) {
checkAuthTask = new checkAuthenticationTask(mobile_token, Access_token);
try {
checkAuthTask.execute((Void) null).get();
} catch (ExecutionException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
}

Well. I just need to add a .get() on the execute() and wrap it inside a try catch.
A dumb mistake.
here's the updated code :
public void runAuthenticationCheck (String mobile_token, String Access_token) {
checkAuthTask = new checkAuthenticationTask(mobile_token, Access_token);
try {
checkAuthTask.execute((Void) null).get();
} catch (ExecutionException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
}

SignalR java client can't invoke method and send data

I created a basic selfhosted SignalR server with the following code:
class Program
{
static void Main(string[] args)
{
// This will *ONLY* bind to localhost, if you want to bind to all addresses
// use http://*:8080 to bind to all addresses.
// See http://msdn.microsoft.com/en-us/library/system.net.httplistener.aspx
// for more information.
string url = "http://localhost:8080";
using (WebApp.Start(url))
{
Console.WriteLine("Server running on {0}", url);
Console.ReadLine();
}
}
}
class Startup
{
public void Configuration(IAppBuilder app)
{
app.UseCors(CorsOptions.AllowAll);
app.MapSignalR();
}
}
public class MyHub : Hub
{
public void Send(string name, string message)
{
Clients.All.addMessage(name, message);
}
}
Which is taken from: https://learn.microsoft.com/en-us/aspnet/signalr/overview/deployment/tutorial-signalr-self-host and works with the Javascript client.
I am now trying to create a Java client and got the following code that is simply supposed to send a message to the server:
String host = "http://localhost:8080";
HubConnection connection = new HubConnection(host);
HubProxy proxy = connection.createHubProxy("MyHub");
connection.start();
try {
System.out.println("Sendng message...");
proxy.invoke( "Send", "Client", "Hello world!" ).get();
System.out.println("Message sent!");
} catch (InterruptedException e) {
System.out.println("err1");
// Handle ...
} catch (ExecutionException e) {
System.out.println("err2");
// Handle ...
}
The problem that im having is that the message is not received by the server, it seems like the code is stuck at the invoke call and doesn't print the Hello world! message. Does someone know what im doing wrong?

hubProxy.invoke("sendMessageByUser", Message, WebApiToken).done(new Action<Void>() {
#Override
public void run(Void aVoid) {
if (aVoid != null)
handler.post(new Runnable() {
#Override
public void run() {
Toast.makeText(MyApplicationService.this, "Mesaj gönderildi", Toast.LENGTH_SHORT).show();
}
});
}
}).onError(new ErrorCallback() {
#Override
public void onError(final Throwable error) {
handler.post(new Runnable() {
#Override
public void run() {
Toast.makeText(MyApplicationService.this.getApplicationContext(), "Bir hata oluştu" + error.toString(), Toast.LENGTH_SHORT).show();
}
});
}
});

How to design a class that can pass data from server when data is finish downloading

I'm new on Android development and I'm learning how to use MVP pattern correctly in recently.
Now I'm facing a tricky problem, hope can get some helpful suggestion or solution from here.
First, here is my presenter
public class MVPPresenter {
private MVPView mvpView;
public MVPPresenter(MVPView mvpView) {
this.mvpView = mvpView;
}
public void loadData() {
mvpView.startLoading();
final List<MVPModel> list = new ArrayList<>();
//the part that I trying to extract starts here.
Call call = DataRetriever.getDataByGet(URLCombiner.GET_FRONT_PAGE_ITEMS);
call.enqueue(new Callback() {
#Override
public void onFailure(Call call, IOException e) {
mvpView.errorLoading();
}
#Override
public void onResponse(Call call, Response response) throws IOException {
if (response.isSuccessful()) {
try {
JSONObject result = new JSONObject(response.body().string());
int errorCode = result.getInt("ErrorCode");
if (errorCode == 0) {
JSONArray value = result.getJSONObject("Value").getJSONArray("hot");
for (int i = 0; i < value.length(); i++) {
MVPModel mvpModel = new MVPModel();
String name = null;
String image = null;
try {
name = value.getJSONObject(i).getString("title");
image = URLCombiner.IP + value.getJSONObject(i).getString("pic");
} catch (JSONException e) {
e.printStackTrace();
}
mvpModel.setName(name);
mvpModel.setImage(image);
list.add(mvpModel);
}
if (list.size() > 0) {
mvpView.successLoading(list);
mvpView.finishLoading();
} else {
mvpView.errorLoading();
}
} else {
mvpView.errorLoading();
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
mvpView.errorLoading();
}
}
});
//the part that I trying to extract ends here.
}
}
As you can see, I'm trying to extract the part which is using OKHttp libs into a class (I call it data manager) which I hope it can handle every task between server and client. But here's the thing, when I trying to pass the result from the data manager to presenter, I got NullPointException because of the async mechanism.
I would like to know how to passing the data, which is come from server in async, to the presenter when the data has finish downloading.
And here's my ideal data manager, I know this might looks stupid but I think this can make my problem more clearly.
public class LoadServerData {
private static JSONArray arrayData = new JSONArray();
public static JSONArray getServerData() {
Call call = DataRetriever.getDataByGet(URLCombiner.GET_FRONT_PAGE_ITEMS);
call.enqueue(new Callback() {
#Override
public void onFailure(Call call, IOException e) {
}
#Override
public void onResponse(Call call, Response response) throws IOException {
if (response.isSuccessful()) {
try {
JSONObject result = new JSONObject(response.body().string());
int errorCode = result.getInt("ErrorCode");
if (errorCode == 0) {
arrayData = result.getJSONObject("Value").getJSONArray("hot"); //the data I would like to return.
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
});
return arrayData; //this is gonna be an empty data.
}
}
I've reading some article that might can solve my problem, but still not getting any fine answer. Perhaps I've using wrong keyword I think. Hopes you guys can give me some ideas or solutions to help me or inspire me.
P.S. version of OKhttp libs is 3.7.0

Create a simple Listener so it can be called whenever the server call finishes:
public class LoadServerData {
public static interface Listener {
public void onSuccess(JSONArray data);
public void onError(Exception error);
}
public static void getServerData(Listener listener) {
Call call = DataRetriever.getDataByGet(URLCombiner.GET_FRONT_PAGE_ITEMS);
call.enqueue(new Callback() {
#Override
public void onFailure(Call call, IOException e) {
listener.onError(e);
}
#Override
public void onResponse(Call call, Response response) throws IOException {
if (response.isSuccessful()) {
try {
JSONObject result = new JSONObject(response.body().string());
int errorCode = result.getInt("ErrorCode");
if (errorCode == 0) {
JSONArray arrayData = result.getJSONObject("Value").getJSONArray("hot"); //the data I would like to return.
listener.onSuccess(arrayData);
} else {
listener.onError(...);
}
} catch (JSONException e) {
e.printStackTrace();
listener.onError(e);
}
} else {
listener.onError(...);
}
}
});
}
}

why am i getting an error on .verifyCredentials()

I want to get the data using twitter's fabric api but whenever i tend to verify credentials and use a callback it shows an error , specifically ,"The arguments differ in length"
void getUserData() {
Twitter.getApiClient(session).getAccountService()
.verifyCredentials(true, false, new Callback<User>() {
#Override
public void failure(TwitterException e) {
}
#Override
public void success(Result<User> userResult) {
User user = userResult.data;
String twitterImage = user.profileImageUrl;
try {
Log.d("imageurl", user.profileImageUrl);
Log.d("name", user.name);
Log.d("email",user.email);
Log.d("des", user.description);
Log.d("followers ", String.valueOf(user.followersCount));
Log.d("createdAt", user.createdAt);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}

If you check the fabric documentation, it shows two version of the method, however when I tried to open the source code in Android Studio but it had only the version without the callback.
You can solve the isssue as follows:
//Getting the account service of the user logged in
Call<User> call = Twitter.getApiClient(session).getAccountService()
.verifyCredentials(true, false);
call.enqueue(new Callback<User>() {
#Override
public void failure(TwitterException e) {
//If any error occurs handle it here
}
#Override
public void success(Result<User> userResult) {
//If it succeeds creating a User object from userResult.data
User user = userResult.data;
String twitterImage = user.profileImageUrl;
try {
Log.d("imageurl", user.profileImageUrl);
Log.d("name", user.name);
Log.d("email",user.email);
Log.d("des", user.description);
Log.d("followers ", String.valueOf(user.followersCount));
Log.d("createdAt", user.createdAt);
} catch (Exception e) {
e.printStackTrace();
}
}
});
Source
Documentation

Just change the twitter dependency in your Build.Gradle
from
compile('com.twitter.sdk.android:twitter:2.0.0#aar') {
transitive = true;
}
to
compile('com.twitter.sdk.android:twitter:1.11.0#aar') {
transitive = true;
}
The new version of the .verifyCredentials() method doesn't accept a callback hence your error.