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Merge branch 'socket-fix' into 'dev'

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Adapted websocket code to new redux specification

See merge request sa4-2020/the-sanmarinoes/backend!73
This commit is contained in:
Claudio Maggioni 2020-04-12 17:52:33 +02:00
commit 9947abee4b
7 changed files with 107 additions and 153 deletions
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5
gradle/wrapper/gradle-wrapper.properties vendored
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@ -1,5 +1,6 @@
#Sun Apr 12 12:33:03 CEST 2020
distributionUrl=https\://services.gradle.org/distributions/gradle-6.2.2-all.zip
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-6.2.2-bin.zip
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME

43
socket_test.html
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@ -1,40 +1,43 @@
<!-- vim: set ts=2 sw=2 et tw=80: -->
<html>
<head>
<head>
<meta charset="utf-8">
</head>
<body>
<div id="malusa">
<h1>Waiting for authentication...</h1>
</div>
<script>
</head>
<body>
<div id="malusa">
<h1>Waiting for authentication...</h1>
</div>
<script>
let malusa = document.getElementById("malusa");
let connection = new WebSocket("ws://localhost:8080/sensor-socket");
let token = localStorage.getItem("token");
if (!token) {
token = prompt("insert authentication token");
localStorage.setItem("token", token);
}
let connection = new WebSocket("ws://localhost:8080/sensor-socket?token=" + token);
console.log("***CREATED WEBSOCKET");
let authentica
connection.onopen = function(evt) {
console.log("***ONOPEN", evt);
connection.send(JSON.stringify({token: prompt("insert authentication token")}));
malusa.innerHTML = "<h1>Socket is now authenticated!</h1>" +
"<img src='https://maggioni.xyz/astley.gif'>";
};
connection.onmessage = function(evt) {
console.log("***ONMESSAGE", evt);
let data = JSON.parse(evt.data);
if (data.authenticated) {
malusa.innerHTML = "<h1>Socket is now authenticated!</h1>" +
"<img src='https://maggioni.xyz/astley.gif'>";
} else if (data.authenticated === false) {
malusa.innerHTML = "<h1>Authentication error</h1>";
} else {
malusa.innerHTML += "<p><pre>" + JSON.stringify(JSON.parse(evt.data), null, 2) + "</pre></p>";
}
malusa.innerHTML += "<p><pre>" + JSON.stringify(JSON.parse(evt.data), null, 2) + "</pre></p>";
};
connection.onerror = function(evt) {
console.error("***ONERROR", evt);
};
</script>
</body>
</script>
</body>
</html>

2
src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/controller/MotionSensorController.java
View file

@ -53,7 +53,7 @@ public class MotionSensorController {
sensor.setDetected(detected);
final MotionSensor toReturn = motionSensorService.save(sensor);
sensorSocketEndpoint.broadcast(sensor, motionSensorService.findUser(sensor.getId()));
sensorSocketEndpoint.queueDeviceUpdate(sensor, motionSensorService.findUser(sensor.getId()));
return toReturn;
}

2
src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/controller/SensorController.java
View file

@ -56,7 +56,7 @@ public class SensorController {
sensor.setValue(value);
final Sensor toReturn = sensorRepository.save(sensor);
sensorSocketEndpoint.broadcast(sensor, sensorRepository.findUser(sensor.getId()));
sensorSocketEndpoint.queueDeviceUpdate(sensor, sensorRepository.findUser(sensor.getId()));
return toReturn;
}

11
src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/scheduled/UpdateTasks.java
View file

@ -43,8 +43,7 @@ public class UpdateTasks {
Sensor.TYPICAL_VALUES
.get(sensor.getSensor())
.multiply(
new BigDecimal(
0.9875 + Math.random() / 40))));
BigDecimal.valueOf(0.9875 + Math.random() / 40))));
}
/**
@ -72,6 +71,12 @@ public class UpdateTasks {
public void smartPlugConsumptionFakeUpdate() {
smartPlugRepository.updateTotalConsumption(SmartPlug.AVERAGE_CONSUMPTION_KW);
final Collection<SmartPlug> c = smartPlugRepository.findByOn(true);
c.forEach(s -> sensorSocketEndpoint.broadcast(s, sensorRepository.findUser(s.getId())));
c.forEach(s -> sensorSocketEndpoint.queueDeviceUpdate(s, sensorRepository.findUser(s.getId())));
}
/** Sends device updates through sensor socket in batch every one second */
@Scheduled(fixedDelay = 1000)
public void socketFlush() {
sensorSocketEndpoint.flushDeviceUpdates();
}
}

95
src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/socket/AuthenticationMessageListener.java
View file

@ -1,95 +0,0 @@
package ch.usi.inf.sa4.sanmarinoes.smarthut.socket;
import ch.usi.inf.sa4.sanmarinoes.smarthut.config.GsonConfig;
import ch.usi.inf.sa4.sanmarinoes.smarthut.config.JWTTokenUtils;
import ch.usi.inf.sa4.sanmarinoes.smarthut.models.User;
import ch.usi.inf.sa4.sanmarinoes.smarthut.models.UserRepository;
import com.google.gson.Gson;
import com.google.gson.JsonObject;
import io.jsonwebtoken.ExpiredJwtException;
import java.io.IOException;
import java.util.Map;
import java.util.function.BiConsumer;
import javax.websocket.MessageHandler;
import javax.websocket.Session;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
/** Generates MessageHandlers for unauthenticated socket sessions */
@Component
public class AuthenticationMessageListener {
private Gson gson = GsonConfig.gson();
private JWTTokenUtils jwtTokenUtils;
private UserRepository userRepository;
@Autowired
public AuthenticationMessageListener(
JWTTokenUtils jwtTokenUtils, UserRepository userRepository) {
this.jwtTokenUtils = jwtTokenUtils;
this.userRepository = userRepository;
}
/**
* Generates a new message handler to handle socket authentication
*
* @param session the session to which authentication must be checked
* @param authorizedSetter function to call once user is authenticated
* @return a new message handler to handle socket authentication
*/
MessageHandler.Whole<String> newHandler(
final Session session, BiConsumer<User, Session> authorizedSetter) {
return new MessageHandler.Whole<>() {
@Override
public void onMessage(final String message) {
if (message == null) {
acknowledge(false);
return;
}
String token;
String username;
try {
token = gson.fromJson(message, JsonObject.class).get("token").getAsString();
username = jwtTokenUtils.getUsernameFromToken(token);
} catch (ExpiredJwtException e) {
System.err.println(e.getMessage());
acknowledge(false);
return;
} catch (Throwable ignored) {
System.out.println("Token format not valid");
acknowledge(false);
return;
}
final User user = userRepository.findByUsername(username);
if (user == null || jwtTokenUtils.isTokenExpired(token)) {
System.out.println("Token not valid");
acknowledge(false);
return;
}
// Here user is authenticated
session.removeMessageHandler(this);
// Add user-session pair in authorized list
authorizedSetter.accept(user, session);
// update client to acknowledge authentication
acknowledge(true);
}
private void acknowledge(boolean success) {
try {
session.getBasicRemote()
.sendText(gson.toJson(Map.of("authenticated", success)));
} catch (IOException e) {
e.printStackTrace();
}
}
};
}
}

102
src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/socket/SensorSocketEndpoint.java
View file

@ -2,67 +2,87 @@ package ch.usi.inf.sa4.sanmarinoes.smarthut.socket;
import ch.usi.inf.sa4.sanmarinoes.smarthut.config.GsonConfig;
import ch.usi.inf.sa4.sanmarinoes.smarthut.config.JWTTokenUtils;
import ch.usi.inf.sa4.sanmarinoes.smarthut.models.Device;
import ch.usi.inf.sa4.sanmarinoes.smarthut.models.User;
import ch.usi.inf.sa4.sanmarinoes.smarthut.models.UserRepository;
import com.google.common.collect.HashMultimap;
import com.google.common.collect.Multimap;
import com.google.common.collect.Multimaps;
import com.google.gson.Gson;
import java.io.IOException;
import java.util.*;
import javax.websocket.*;
import com.google.gson.JsonObject;
import io.jsonwebtoken.ExpiredJwtException;
import org.hibernate.annotations.common.reflection.XProperty;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.parameters.P;
import org.springframework.stereotype.Component;
/** Endpoint of socket at URL /sensor-socket used to update the client with sensor information */
/**
* Endpoint of socket at URL /sensor-socket used to update the client with sensor information
*/
@Component
public class SensorSocketEndpoint extends Endpoint {
private Gson gson = GsonConfig.gson();
private AuthenticationMessageListener authenticationMessageListener;
private UserRepository userRepository;
private Set<Session> unauthorizedClients = Collections.synchronizedSet(new HashSet<>());
private JWTTokenUtils jwtTokenUtils;
private Multimap<User, Session> authorizedClients =
Multimaps.synchronizedMultimap(HashMultimap.create());
private final Map<User, Map<Long, Device>> messages = new HashMap<>();
@Autowired
public SensorSocketEndpoint(AuthenticationMessageListener authenticationMessageListener) {
this.authenticationMessageListener = authenticationMessageListener;
public SensorSocketEndpoint(UserRepository userRepository, JWTTokenUtils jwtTokenUtils) {
this.jwtTokenUtils = jwtTokenUtils;
this.userRepository = userRepository;
}
/**
* Returns a synchronized set of socket sessions not yet authorized with a token
*
* @return a synchronized set of socket sessions not yet authorized with a token
* Queues a single device update for a certain user to be sent
* @param device the device update to be sent
* @param u the user the device belongs
*/
public Set<Session> getUnauthorizedClients() {
return unauthorizedClients;
public void queueDeviceUpdate(Device device, User u) {
synchronized (messages) {
messages.putIfAbsent(u, new HashMap<>());
messages.get(u).put(device.getId(), device);
}
}
/**
* Returns a synchronized User to Session multimap with authorized sessions
*
* @return a synchronized User to Session multimap with authorized sessions
* Sends all device updates queued to be sent in a unique WebSocket message
*/
public Multimap<User, Session> getAuthorizedClients() {
return authorizedClients;
public void flushDeviceUpdates() {
synchronized (messages) {
for (Map.Entry<User, Map<Long, Device>> batchForUser : messages.entrySet()) {
broadcast(batchForUser.getKey(), batchForUser.getValue().values());
batchForUser.getValue().clear();
}
}
}
/**
* Given a message and a user, broadcasts that message in json to all associated clients and
* returns the number of successful transfers
* Given a collection of messages and a user, broadcasts that message in json to all
* associated clients
*
* @param message the message to send
* @param u the user to which to send the message
* @return number of successful transfer
* @param messages the message batch to send
* @param u the user to which to send the message
*/
public void broadcast(Object message, User u) {
private void broadcast(User u, Collection<?> messages) {
if (messages.isEmpty()) return;
final HashSet<Session> sessions = new HashSet<>(authorizedClients.get(u));
for (Session s : sessions) {
try {
if (s.isOpen()) {
s.getBasicRemote().sendText(gson.toJson(message));
s.getBasicRemote().sendText(gson.toJson(messages));
} else {
authorizedClients.remove(u, s);
}
@ -76,17 +96,37 @@ public class SensorSocketEndpoint extends Endpoint {
* Handles the opening of a socket session with a client
*
* @param session the newly born session
* @param config endpoint configuration
* @param config endpoint configuration
*/
@Override
public void onOpen(Session session, EndpointConfig config) {
unauthorizedClients.add(session);
session.addMessageHandler(
authenticationMessageListener.newHandler(
session,
(u, s) -> {
unauthorizedClients.remove(s);
authorizedClients.put(u, s);
}));
final List<String> tokenQuery = session.getRequestParameterMap().get("token");
User u;
if (!tokenQuery.isEmpty() && (u = checkToken(tokenQuery.get(0))) != null) {
authorizedClients.put(u, session);
} else {
try {
session.close();
} catch (IOException ignored) {
}
}
}
private User checkToken(String protocolString) {
String username;
try {
username = jwtTokenUtils.getUsernameFromToken(protocolString);
} catch (Throwable ignored) {
System.out.println("Token format not valid");
return null;
}
final User user = userRepository.findByUsername(username);
if (user != null && !jwtTokenUtils.isTokenExpired(protocolString)) {
return user;
} else {
return null;
}
}
}