I need to establish connection between client websocket threw my backend on spring java to another websocket where my backend is a client, I established connection as client but can't figure out how to send it back as soon as my client send me message,
My Client Endpoint works as I need
#Service
#ClientEndpoint
public class ClientEndpoint {
Session userSession = null;
private MessageHandler messageHandler;
public WbsClientEndpoint(#Value("${url}") String url) {
try {
WebSocketContainer container = ContainerProvider.getWebSocketContainer();
container.connectToServer(this, new URI(url));
} catch (Exception e) {
throw new RuntimeException(e);
}
}
#OnOpen
public void onOpen(Session userSession) {
System.out.println("opening web socket");
this.userSession = userSession;
}
#OnClose
public void onClose(Session userSession, CloseReason reason) {
System.out.println("closing web socket");
this.userSession = null;
}
#OnMessage
public void onMessage(String message) {
if (this.messageHandler != null) {
this.messageHandler.handleMessage(message);
}
}
public void addMessageHandler(MessageHandler msgHandler) {
this.messageHandler = msgHandler;
}
public void sendMessage(String message) {
this.userSession.getAsyncRemote().sendText(message);
}
public interface MessageHandler {
void handleMessage(String message);
}
}
and example of method when I send my message as client, it does what I need but now I only printing the message cause cannot connect it to my message handler:
#Override
public void addDevice(DeviceTransfer deviceTransfer) {
clientEndPoint.addMessageHandler(message -> {
System.out.println("Response: " + message);
});
clientEndPoint.sendMessage(JSON.toJSONString(deviceTransfer));
}
Also I wrote a websockethandler for messages that comes to my backend:
#Component
public class WebSocketHandler extends AbstractWebSocketHandler {
#Override
protected void handleTextMessage(WebSocketSession session, TextMessage message) throws IOException {
System.out.println("New Text Message Received" + message + " ___ " + session);
String clientMessage = message.getPayload();
if (clientMessage.startsWith("/addDevice")) {
//Here I don't know how to send this clientMessage and wait for result from my addDevice method to return it back
}
}
}
And I need to connect both of the realizations to establish connection in real time.
When client sends message to me I must send this message to another server as client.
My client code on JavaScript as example, when I press button it establish connection to my web socket and send my message:
const connectBtn = document.getElementById('connect');
if (connectBtn) {
connectBtn.addEventListener('click', function () {
window.socket1 = new WebSocket("ws://localhost:8081/ws");
socket1.onopen = function(e) {
console.log("[open]");
socket1.send(JSON.stringify({"command": "subscribe","identifier":"{\"channel\":\"/topic/addDevice\"}"}))
};
socket1.onmessage = function(event) {
console.log(`[message]: ${event.data}`);
};
socket1.onclose = function(event) {
if (event.wasClean) {
console.log(`[close],code=${event.code}reason=${event.reason}`);
} else {
console.log('[close]');
}
};
socket1.onerror = function(error) {
console.log(`[error] ${error.message}`);
};
});
}
It seems to me like you need to keep track of your ClientEndpoint instances:
public class ClientEndpoint {
private HashSet<ClientEndpoint> endpoints = new HashSet<>();
// or perhaps a HashMap using `userSession.id` or similar
private HashMap<string, ClientEndpoint> userToEndpoint = new HahsMap<>();
#OnOpen
public void onOpen(Session userSession) {
System.out.println("opening web socket");
this.userSession = userSession;
this.endpoints.add(this);
this.userToEndpoint.put(userSession.id, this);
}
#OnClose
public void onClose(Session userSession, CloseReason reason) {
System.out.println("closing web socket");
this.endpoints.remove(this);
this.userToEndpoint.delete(userSession.id);
this.userSession = null;
}
}
You can use endpoints/userToEndpoint to find all connected clients, perhaps filter by which rooms they're in (I assume that's what you're trying to accomplish with that subscribe command), and do whatever you want with that information. E.g. a broadcast to everyone except the sender:
for (ClientEnpoint endpoint : this.endpoints) {
if (endpoint == sender) continue; // Don't send to sender
endpoint.sendMessage("message");
}
This is similar to below but without Ajax. I am using JavaScript and XMLHttpRequest
AJAX post data is null when it reaches the ASP.NET Core 2.1 controller
Everything works good in ASP.NET MVC but I am learning ASP.NET Core MVC.
A button in Home.cshtml calls below JavaScript method which intern calls a method named Test in HomeController.cs.
My problem is if I keep break point in my Test method serverName and port are both null
function MyMethod() {
var xmlhttp = new XMLHttpRequest();
var url = "/Home/Test";
var input = {};
input.serverName = document.getElementById("serverName").value;
input.port = document.getElementById("port").value;
xmlhttp.onreadystatechange = function () {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
var jsResp = JSON.parse(xmlhttp.responseText);
if (jsResp.Status == "Success") {
//show success
}
else {
//show error
}
}
}
xmlhttp.open("POST", url, true);
xmlhttp.setRequestHeader("Content-Type", "application/json;charset=UTF-8");
xmlhttp.send(JSON.stringify(input));
}
[HttpPost]
public JsonResult Test(string serverName, string port)
{
try
{
if (string.IsNullOrEmpty(serverName) ||
string.IsNullOrEmpty(port))
{
return Json(new { Status = "Error", Message = "Missing Data" });
}
else
{
return Json(new { Status = "Success", Message = "Got data" });
}
}
catch (Exception e)
{
return Json(new { Status = "Error", Message = e.Message });
}
}
I even tried below but none helps
public JsonResult Test(JObject serverName, JObject port) -- controller method not hiting
public JsonResult Test(object serverName, object port) -- not allowing me to cast into string
public JsonResult Test([FromBody] string serverName, [FromBody] string port)
Since your content type is application/json;charset=UTF-8, you need to use [FromBody] and receive the data as an object based on your situation.
Besides, you could only use [FromBody] in the action parameters once(from here)
Don't apply [FromBody] to more than one parameter per action method. The ASP.NET Core runtime delegates the responsibility of reading the request stream to the input formatter. Once the request stream is read, it's no longer available to be read again for binding other [FromBody] parameters.
You could follow below steps to pass data correctly:
1.Create a ViewModel:
public class ServerModel
{
public string serverName { get; set; }
public string port { get; set; }
}
2.Action:
[HttpPost]
public JsonResult Test([FromBody] ServerModel data)
{
try
{
if (string.IsNullOrEmpty(data.serverName) ||
string.IsNullOrEmpty(data.port))
{
return Json(new { Status = "Error", Message = "Missing Data" });
}
else
{
return Json(new { Status = "Success", Message = "Got data" });
}
}
catch (Exception e)
{
return Json(new { Status = "Error", Message = e.Message });
}
}
while signing up, I am unable to get the response code and error message so can you help me?
This is My Interface
public interface SignupAPI {
#FormUrlEncoded
#POST("users")
Call<ResponseBody> createUser(
#Field("email") String email,
#Field("password") String password,
#Field("role") String role
);
}
This is Java Class
public class SignupClient {
private static final String BASE_URL = "http://74.207.233.160/api/v1/";
private static SignupClient mInstance;
private Retrofit retrofit;
private SignupClient(){
retrofit = new Retrofit.Builder().baseUrl(BASE_URL).addConverterFactory(GsonConverterFactory.create()).build();
}
public static synchronized SignupClient getmInstance(){
if (mInstance == null){
mInstance = new SignupClient();
}
return mInstance;
}
public SignupAPI getApi(){
return retrofit.create(SignupAPI.class);
}
}
This Is Signup Activity
progressBar.setVisibility(View.VISIBLE);
Call<ResponseBody> call = SignupClient.getmInstance().getApi().createUser(email, password,role);
call.enqueue(new Callback<ResponseBody>() {
#Override
public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
if (response.isSuccessful()){
progressBar.setVisibility(View.GONE);
Toast.makeText(SignupActivity.this, "Account Sucessfully Created", Toast.LENGTH_SHORT).show();
}else {
try {
progressBar.setVisibility(View.GONE);
JSONObject jsonError = new JSONObject(response.errorBody().string());
Toast.makeText(SignupActivity.this, jsonError.getString("errors"),Toast.LENGTH_SHORT).show();
} catch (JSONException e) {
progressBar.setVisibility(View.GONE);
e.printStackTrace();
} catch (IOException e) {
progressBar.setVisibility(View.GONE);
e.printStackTrace();
}
}
}
#Override
public void onFailure(Call<ResponseBody> call, Throwable t) {
Toast.makeText(SignupActivity.this, t.getMessage(), Toast.LENGTH_SHORT).show();
}
I am not able to get error message and also response code so please help me to get it.
Here is the Postman PostMan API
Here I have written how you can get HTTP code from both success response and error response.
#Override
public void onResponse(Call<T> call, Response<T> response) {
int statusCode = response.code();
}
#Override
public void onFailure(Call<T> call, Throwable t) {
if (new Exception(t) instanceof HttpException) {
int statusCode = ((HttpException) t).getStatusCode();
else {
// unknown error
}
}
I want to access total unread message count. the code I used in my rails app is
function unreadMessageCount(){
Set<String> dialogsIds = new HashSet<String>(){{ add("56f3fac3a0eb4786ae00003f"); add("56f3f546a28f9affc0000033"); }};
QBChatService.getTotalUnreadMessagesCount(dialogsIds, new QBEntityCallback<Integer>() {
#Override public void onSuccess(Integer total, Bundle params) {
Log.i(TAG, "total unread messages: " + total);
Log.i(TAG, "dialog Unread1: " +
params.getInt("56f3fac3a0eb4786ae00003f"));
Log.i(TAG, "dialog Unread2: " +
params.getInt("56f3f546a28f9affc0000033"));
}
#Override public void onError(QBResponseException responseException) { }
});
} ```
In js console I am gating "unreadMessageCount is not defined".
var params = {chat_dialog_ids: ["12788459823458761223123124"]};
QB.chat.message.unreadCount(params, function(err, res) {
if(err){
}else{
}
});
Not sure if I am doing something wrong but using this api https://www.firebase.com/docs/security/simple-login-email-password.html I can successfully create a user - according to the return message, but I can not see that user anywhere in the Forge console. How do you know what users are registered?
Should I be taking the return user ID and creating my own user object in Firebase or is this duplication unnecessary. I do need to add some additional user properties so perhapes I will need to do this anyway.
When using email / password authentication in Firebase Authentication (previously known as Firebase SimpleLogin), your user's email and password combination is securely stored separately from the data actually stored in your Firebase.
This barrier between the data in your Firebase and your users' email / password hash combinations is by design: we want to make it easier for you to (1) develop your application, (2) prevent any accidental user credential leaks, and (3) still give you total flexibility with how to store your user data in Firebase.
That means that we only store the email address / password hash combination and nothing else, so it is up to you to decide how to store actual user data in your Firebase. As you suggested, you should be taking the user id and storing that data in your Firebase in a location such as /users/$id, and using the Firebase Security Rules Language to determine read / write access to that data. Your user's unique id and email are already in the auth variable you'll use when writing rules.
Here i created an Android program to do what Rob said for firebase beginner(like me)
out there.this program first store the username of the signedUp or signedIn user and then display them in a listView
SignInActivity.java
public class SignInActivity extends BaseActivity implements View.OnClickListener,View.OnKeyListener{
private DatabaseReference mDatabase;
public static FirebaseAuth mAuth;
private static final String TAG = "MainActivity";
EditText usernameField;
EditText passwordField;
TextView changeSignUpModeTextView;
Button signUpButton;
ImageView logo;
RelativeLayout relativeLayout;
Boolean signUpModeActive;
static ArrayList<String> userList = new ArrayList<>();
#Override
public void onStart() {
super.onStart();
// Check auth on Activity start
if (mAuth.getCurrentUser() != null) {
onAuthSuccess(mAuth.getCurrentUser());
}
}
#Override
public boolean onKey(View view, int i, KeyEvent keyEvent) {
if(i == keyEvent.KEYCODE_ENTER && keyEvent.getAction() == keyEvent.ACTION_DOWN){
signUpOrLogIn(view);
}
return false;
}
#Override
public void onClick(View view) {
if(view.getId() == R.id.changeSignUpMode){
if (signUpModeActive == true){
signUpModeActive = false;
changeSignUpModeTextView.setText("Sign Up");
signUpButton.setText("Log In");
}else{
signUpModeActive = true;
changeSignUpModeTextView.setText("Log In");
signUpButton.setText("Sign Up");
}
}else if(view.getId() == R.id.logo || view.getId() == R.id.relativeLayout){
InputMethodManager inm = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE);
inm.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(),0);
}
}
public void signUpOrLogIn(View view) {
showProgressDialog();
String email = usernameField.getText().toString().trim();
String password = passwordField.getText().toString().trim();
if (signUpModeActive == true) {
mAuth.createUserWithEmailAndPassword(email,password)
.addOnCompleteListener(MainActivity.this, new OnCompleteListener<AuthResult>() {
#Override
public void onComplete(#NonNull Task<AuthResult> task) {
hideProgressDialog();
Toast.makeText(MainActivity.this, "createUserWithEmail:onComplete:" + task.isSuccessful(), Toast.LENGTH_SHORT).show();
// If sign in fails, display a message to the user. If sign in succeeds
// the auth state listener will be notified and logic to handle the
// signed in user can be handled in the listener.
if (!task.isSuccessful()) {
Toast.makeText(MainActivity.this, "Authentication failed." + task.getException().toString().substring(task.getException().toString().indexOf(" ")),
Toast.LENGTH_SHORT).show();
Log.i("Error", task.getException().toString());
} else {
onAuthSuccess(task.getResult().getUser());
showUserList();
}
}
});
} else {
mAuth.signInWithEmailAndPassword(email,password)
.addOnCompleteListener(MainActivity.this, new OnCompleteListener<AuthResult>() {
#Override
public void onComplete(#NonNull Task<AuthResult> task) {
hideProgressDialog();
// If sign in fails, display a message to the user. If sign in succeeds
// the auth state listener will be notified and logic to handle the
// signed in user can be handled in the listener.
if (!task.isSuccessful()) {
// there was an error
Toast.makeText(MainActivity.this, task.getException().toString(),
Toast.LENGTH_LONG).show();
} else
{
onAuthSuccess(task.getResult().getUser());
showUserList();
}
}
});
}
}
public void showUserList(){
startActivity(new Intent(getApplicationContext(), UserList.class));
finish();
}
private void onAuthSuccess(FirebaseUser user) {
String username = usernameFromEmail(user.getEmail());
// Write new user
writeNewUser(user.getUid(), username, user.getEmail());
// Go to MainActivity
}
private String usernameFromEmail(String email) {
if (email.contains("#")) {
return email.split("#")[0];
} else {
return email;
}
}
private void writeNewUser(String userId, String name, String email) {
User user = new User(name, email);
mDatabase.child("users").child(userId).setValue(user);
ArrayList<String> userNames = new ArrayList<>();
userNames.add(name);
mDatabase.child("usernamelist").setValue(userNames);
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mAuth = FirebaseAuth.getInstance();
mDatabase = FirebaseDatabase.getInstance().getReference();
if(mAuth.getCurrentUser()!=null){
showUserList();
}
usernameField = (EditText) findViewById(R.id.username);
passwordField = (EditText) findViewById(R.id.password);
changeSignUpModeTextView = (TextView) findViewById(R.id.changeSignUpMode);
signUpButton = (Button) findViewById(R.id.signupbutton);
logo = (ImageView)findViewById(R.id.logo);
relativeLayout= (RelativeLayout)findViewById(R.id.relativeLayout);
signUpModeActive = true;
changeSignUpModeTextView.setOnClickListener(this);
usernameField.setOnKeyListener(this);
passwordField.setOnKeyListener(this);
logo.setOnClickListener(this);
relativeLayout.setOnClickListener(this);
}
}
UserList.java
public class UserList extends AppCompatActivity {
private static final String TAG = "UserList" ;
private DatabaseReference userlistReference;
private ValueEventListener mUserListListener;
ArrayList<String> usernamelist = new ArrayList<>();
ArrayAdapter arrayAdapter;;
ListView userListView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_user_list);
userlistReference = FirebaseDatabase.getInstance().getReference().child("usernamelist");
onStart();
userListView = (ListView) findViewById(R.id.userlistview);
}
#Override
protected void onStart() {
super.onStart();
final ValueEventListener userListener = new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
usernamelist = new ArrayList<>((ArrayList) dataSnapshot.getValue());
usernamelist.remove(usernameOfCurrentUser());
Log.i(TAG, "onDataChange: "+usernamelist.toString());
arrayAdapter = new ArrayAdapter(UserList.this,android.R.layout.simple_list_item_1,usernamelist);
userListView.setAdapter(arrayAdapter);
}
#Override
public void onCancelled(DatabaseError databaseError) {
Log.w(TAG, "onCancelled: ",databaseError.toException());
Toast.makeText(UserList.this, "Failed to load User list.",
Toast.LENGTH_SHORT).show();
}
};
userlistReference.addValueEventListener(userListener);
mUserListListener = userListener;
}
public String usernameOfCurrentUser()
{
String email = MainActivity.mAuth.getCurrentUser().getEmail();
if (email.contains("#")) {
return email.split("#")[0];
} else {
return email;
}
}
#Override
public void onStop() {
super.onStop();
// Remove post value event listener
if (mUserListListener != null) {
userlistReference.removeEventListener(mUserListListener);
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch(item.getItemId()) {
case R.id.action_logout:
FirebaseAuth.getInstance().signOut();
startActivity(new Intent(this, MainActivity.class));
finish();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
You can use Google Identity Toolkit API to get a list of all registered users in your Firebase project, this API is used by the Firebase CLI which can be accessed by running firebase auth:export results-file
Make sure Identity Toolkit API is enabled
firebase-users-list.js
const serviceAccount = require('path/to/firebase-sdk-json-service-account');
const googleapis = require('googleapis');
const identitytoolkit = googleapis.identitytoolkit('v3');
const authClient = new googleapis.auth.JWT(
serviceAccount.client_email,
null,
serviceAccount.private_key,
['https://www.googleapis.com/auth/firebase'],
null
);
authClient.authorize((err) => {
if (err) {
return console.error(err);
}
let nextPageToken = undefined;
let users = [];
const getAccounts = () => identitytoolkit.relyingparty.downloadAccount({
auth: authClient,
resource: {
targetProjectId: serviceAccount.project_id,
maxResults: 200,
nextPageToken: nextPageToken
}
}, (e, results) => {
if (e) {
return console.error(err);
}
users = users.concat(results.users);
if (results.nextPageToken) {
nextPageToken = results.nextPageToken;
return getAccounts();
} else {
console.log(users);
}
});
getAccounts();
});
It's possible to use cloud function to fetch users list (view docs at firebase). Note, in the following example custom claims feature is used to check if user has enough privileges.
// USERS: return full users list for admin
// >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
import * as admin from 'firebase-admin'
import * as functions from 'firebase-functions'
export const listUsers = functions.https.onCall((data, context) => {
// check if user is admin (true "admin" custom claim), return error if not
const isAdmin = context.auth.token.admin === true
if (!isAdmin) {
return { error: `Unauthorized.` }
}
return admin
.auth()
.listUsers()
.then((listUsersResult) => {
// go through users array, and deconstruct user objects down to required fields
const result = listUsersResult.users.map((user) => {
const { uid, email, photoURL, displayName, disabled } = user
return { uid, email, photoURL, displayName, disabled }
})
return { result }
})
.catch((error) => {
return { error: 'Error listing users' }
})
})
You can do it using admin.auth().listUsers
Here is the doc for this: https://firebase.google.com/docs/reference/admin/node/admin.auth.Auth.html#listusers
And an usage example: https://firebase.google.com/docs/auth/admin/manage-users#list_all_users
function listAllUsers(nextPageToken) {
// List batch of users, 1000 at a time.
admin.auth().listUsers(1000, nextPageToken)
.then(function(listUsersResult) {
listUsersResult.users.forEach(function(userRecord) {
console.log('user', userRecord.toJSON());
});
if (listUsersResult.pageToken) {
// List next batch of users.
listAllUsers(listUsersResult.pageToken);
}
})
.catch(function(error) {
console.log('Error listing users:', error);
});
}
// Start listing users from the beginning, 1000 at a time.
listAllUsers();
i will answer it simply as much as possible
just add the registered user to your data base by using the following code
you can also use shared prefernces to save the data locally but it won't be able for other user.
once you save the list of user in the database simply retrieve it from there using adapters
FirebaseDatabase.getInstance().getReference().child("my_user")
.child(task.getResult().getUser().getUid())
.child("username").setValue(autoCompleteTextView1.getText().toString());
Users list in python:
from firebase_admin import credentials, db, auth
cred = credentials.Certificate('\path\to\serviceAccountKey.json')
default_app = firebase_admin.initialize_app(cred, {
"databaseURL": "https://data_base_url.firebaseio.com"
})
users = auth.list_users()