nmode's Git Repositories - signal-cli/blob - lib/src/main/java/org/asamk/signal/manager/helper/ReceiveHelper.java

   1 package org.asamk.signal.manager.helper;
   2
   3 import org.asamk.signal.manager.Manager;
   4 import org.asamk.signal.manager.SignalDependencies;
   5 import org.asamk.signal.manager.actions.HandleAction;
   6 import org.asamk.signal.manager.api.ReceiveConfig;
   7 import org.asamk.signal.manager.api.UntrustedIdentityException;
   8 import org.asamk.signal.manager.storage.SignalAccount;
   9 import org.asamk.signal.manager.storage.messageCache.CachedMessage;
  10 import org.asamk.signal.manager.storage.recipients.RecipientAddress;
  11 import org.slf4j.Logger;
  12 import org.slf4j.LoggerFactory;
  13 import org.whispersystems.signalservice.api.SignalWebSocket;
  14 import org.whispersystems.signalservice.api.messages.SignalServiceEnvelope;
  15 import org.whispersystems.signalservice.api.websocket.WebSocketConnectionState;
  16 import org.whispersystems.signalservice.api.websocket.WebSocketUnavailableException;
  17
  18 import java.io.IOException;
  19 import java.time.Duration;
  20 import java.util.Collection;
  21 import java.util.HashMap;
  22 import java.util.HashSet;
  23 import java.util.List;
  24 import java.util.Map;
  25 import java.util.Set;
  26 import java.util.concurrent.TimeoutException;
  27
  28 import io.reactivex.rxjava3.core.Observable;
  29 import io.reactivex.rxjava3.schedulers.Schedulers;
  30
  31 public class ReceiveHelper {
  32
  33     private final static Logger logger = LoggerFactory.getLogger(ReceiveHelper.class);
  34     private final static int MAX_BACKOFF_COUNTER = 9;
  35
  36     private final SignalAccount account;
  37     private final SignalDependencies dependencies;
  38     private final Context context;
  39
  40     private ReceiveConfig receiveConfig = new ReceiveConfig(false, false, false);
  41     private boolean needsToRetryFailedMessages = false;
  42     private boolean hasCaughtUpWithOldMessages = false;
  43     private boolean isWaitingForMessage = false;
  44     private boolean shouldStop = false;
  45     private Callable authenticationFailureListener;
  46     private Callable caughtUpWithOldMessagesListener;
  47
  48     public ReceiveHelper(final Context context) {
  49         this.account = context.getAccount();
  50         this.dependencies = context.getDependencies();
  51         this.context = context;
  52     }
  53
  54     public void setReceiveConfig(final ReceiveConfig receiveConfig) {
  55         this.receiveConfig = receiveConfig;
  56         dependencies.setAllowStories(!receiveConfig.ignoreStories());
  57     }
  58
  59     public void setNeedsToRetryFailedMessages(final boolean needsToRetryFailedMessages) {
  60         this.needsToRetryFailedMessages = needsToRetryFailedMessages;
  61     }
  62
  63     public boolean hasCaughtUpWithOldMessages() {
  64         return hasCaughtUpWithOldMessages;
  65     }
  66
  67     public void setAuthenticationFailureListener(final Callable authenticationFailureListener) {
  68         this.authenticationFailureListener = authenticationFailureListener;
  69     }
  70
  71     public void setCaughtUpWithOldMessagesListener(final Callable caughtUpWithOldMessagesListener) {
  72         this.caughtUpWithOldMessagesListener = caughtUpWithOldMessagesListener;
  73     }
  74
  75     public boolean requestStopReceiveMessages() {
  76         this.shouldStop = true;
  77         return isWaitingForMessage;
  78     }
  79
  80     public void receiveMessagesContinuously(Manager.ReceiveMessageHandler handler) {
  81         while (!shouldStop) {
  82             try {
  83                 receiveMessages(Duration.ofMinutes(1), false, handler);
  84                 break;
  85             } catch (IOException e) {
  86                 logger.warn("Receiving messages failed, retrying", e);
  87             }
  88         }
  89     }
  90
  91     public void receiveMessages(
  92             Duration timeout, boolean returnOnTimeout, Manager.ReceiveMessageHandler handler
  93     ) throws IOException {
  94         needsToRetryFailedMessages = true;
  95         hasCaughtUpWithOldMessages = false;
  96
  97         // Use a Map here because java Set doesn't have a get method ...
  98         Map<HandleAction, HandleAction> queuedActions = new HashMap<>();
  99
 100         final var signalWebSocket = dependencies.getSignalWebSocket();
 101         final var webSocketStateDisposable = Observable.merge(signalWebSocket.getUnidentifiedWebSocketState(),
 102                         signalWebSocket.getWebSocketState())
 103                 .subscribeOn(Schedulers.computation())
 104                 .observeOn(Schedulers.computation())
 105                 .distinctUntilChanged()
 106                 .subscribe(this::onWebSocketStateChange);
 107         signalWebSocket.connect();
 108
 109         try {
 110             receiveMessagesInternal(signalWebSocket, timeout, returnOnTimeout, handler, queuedActions);
 111         } finally {
 112             hasCaughtUpWithOldMessages = false;
 113             handleQueuedActions(queuedActions.keySet());
 114             queuedActions.clear();
 115             signalWebSocket.disconnect();
 116             webSocketStateDisposable.dispose();
 117             shouldStop = false;
 118         }
 119     }
 120
 121     private void receiveMessagesInternal(
 122             final SignalWebSocket signalWebSocket,
 123             Duration timeout,
 124             boolean returnOnTimeout,
 125             Manager.ReceiveMessageHandler handler,
 126             final Map<HandleAction, HandleAction> queuedActions
 127     ) throws IOException {
 128         var backOffCounter = 0;
 129         isWaitingForMessage = false;
 130
 131         while (!shouldStop) {
 132             if (needsToRetryFailedMessages) {
 133                 retryFailedReceivedMessages(handler);
 134                 needsToRetryFailedMessages = false;
 135             }
 136             SignalServiceEnvelope envelope;
 137             final CachedMessage[] cachedMessage = {null};
 138             final var nowMillis = System.currentTimeMillis();
 139             if (nowMillis - account.getLastReceiveTimestamp() > 60000) {
 140                 account.setLastReceiveTimestamp(nowMillis);
 141             }
 142             logger.debug("Checking for new message from server");
 143             try {
 144                 isWaitingForMessage = true;
 145                 var result = signalWebSocket.readOrEmpty(timeout.toMillis(), envelope1 -> {
 146                     isWaitingForMessage = false;
 147                     final var recipientId = envelope1.hasSourceUuid() ? account.getRecipientResolver()
 148                             .resolveRecipient(envelope1.getSourceAddress()) : null;
 149                     logger.trace("Storing new message from {}", recipientId);
 150                     // store message on disk, before acknowledging receipt to the server
 151                     cachedMessage[0] = account.getMessageCache().cacheMessage(envelope1, recipientId);
 152                 });
 153                 isWaitingForMessage = false;
 154                 backOffCounter = 0;
 155
 156                 if (result.isPresent()) {
 157                     envelope = result.get();
 158                     logger.debug("New message received from server");
 159                 } else {
 160                     logger.debug("Received indicator that server queue is empty");
 161                     handleQueuedActions(queuedActions.keySet());
 162                     queuedActions.clear();
 163
 164                     hasCaughtUpWithOldMessages = true;
 165                     caughtUpWithOldMessagesListener.call();
 166
 167                     // Continue to wait another timeout for new messages
 168                     continue;
 169                 }
 170             } catch (AssertionError e) {
 171                 if (e.getCause() instanceof InterruptedException) {
 172                     break;
 173                 } else {
 174                     throw e;
 175                 }
 176             } catch (IOException e) {
 177                 logger.debug("Pipe unexpectedly unavailable: {}", e.getMessage());
 178                 if (e instanceof WebSocketUnavailableException || "Connection closed!".equals(e.getMessage())) {
 179                     final var sleepMilliseconds = 100 * (long) Math.pow(2, backOffCounter);
 180                     backOffCounter = Math.min(backOffCounter + 1, MAX_BACKOFF_COUNTER);
 181                     logger.warn("Connection closed unexpectedly, reconnecting in {} ms", sleepMilliseconds);
 182                     try {
 183                         Thread.sleep(sleepMilliseconds);
 184                     } catch (InterruptedException interruptedException) {
 185                         return;
 186                     }
 187                     hasCaughtUpWithOldMessages = false;
 188                     signalWebSocket.connect();
 189                     continue;
 190                 }
 191                 throw e;
 192             } catch (TimeoutException e) {
 193                 backOffCounter = 0;
 194                 if (returnOnTimeout) return;
 195                 continue;
 196             }
 197
 198             final var result = context.getIncomingMessageHandler().handleEnvelope(envelope, receiveConfig, handler);
 199             for (final var h : result.first()) {
 200                 final var existingAction = queuedActions.get(h);
 201                 if (existingAction == null) {
 202                     queuedActions.put(h, h);
 203                 } else {
 204                     existingAction.mergeOther(h);
 205                 }
 206             }
 207             final var exception = result.second();
 208
 209             if (hasCaughtUpWithOldMessages) {
 210                 handleQueuedActions(queuedActions.keySet());
 211                 queuedActions.clear();
 212             }
 213             if (cachedMessage[0] != null) {
 214                 if (exception instanceof UntrustedIdentityException) {
 215                     logger.debug("Keeping message with untrusted identity in message cache");
 216                     final var address = ((UntrustedIdentityException) exception).getSender();
 217                     final var recipientId = account.getRecipientResolver().resolveRecipient(address.getServiceId());
 218                     if (!envelope.hasSourceUuid()) {
 219                         try {
 220                             cachedMessage[0] = account.getMessageCache().replaceSender(cachedMessage[0], recipientId);
 221                         } catch (IOException ioException) {
 222                             logger.warn("Failed to move cached message to recipient folder: {}",
 223                                     ioException.getMessage());
 224                         }
 225                     }
 226                 } else {
 227                     cachedMessage[0].delete();
 228                 }
 229             }
 230         }
 231     }
 232
 233     private void retryFailedReceivedMessages(Manager.ReceiveMessageHandler handler) {
 234         Set<HandleAction> queuedActions = new HashSet<>();
 235         for (var cachedMessage : account.getMessageCache().getCachedMessages()) {
 236             var actions = retryFailedReceivedMessage(handler, cachedMessage);
 237             if (actions != null) {
 238                 queuedActions.addAll(actions);
 239             }
 240         }
 241         handleQueuedActions(queuedActions);
 242     }
 243
 244     private List<HandleAction> retryFailedReceivedMessage(
 245             final Manager.ReceiveMessageHandler handler, final CachedMessage cachedMessage
 246     ) {
 247         var envelope = cachedMessage.loadEnvelope();
 248         if (envelope == null) {
 249             cachedMessage.delete();
 250             return null;
 251         }
 252
 253         final var result = context.getIncomingMessageHandler().handleRetryEnvelope(envelope, receiveConfig, handler);
 254         final var actions = result.first();
 255         final var exception = result.second();
 256
 257         if (exception instanceof UntrustedIdentityException) {
 258             if (System.currentTimeMillis() - envelope.getServerDeliveredTimestamp() > 1000L * 60 * 60 * 24 * 30) {
 259                 // Envelope is more than a month old, cleaning up.
 260                 cachedMessage.delete();
 261                 return null;
 262             }
 263             if (!envelope.hasSourceUuid()) {
 264                 final var identifier = ((UntrustedIdentityException) exception).getSender();
 265                 final var recipientId = account.getRecipientResolver()
 266                         .resolveRecipient(new RecipientAddress(identifier));
 267                 try {
 268                     account.getMessageCache().replaceSender(cachedMessage, recipientId);
 269                 } catch (IOException ioException) {
 270                     logger.warn("Failed to move cached message to recipient folder: {}", ioException.getMessage());
 271                 }
 272             }
 273             return null;
 274         }
 275
 276         // If successful and for all other errors that are not recoverable, delete the cached message
 277         cachedMessage.delete();
 278         return actions;
 279     }
 280
 281     private void handleQueuedActions(final Collection<HandleAction> queuedActions) {
 282         logger.debug("Handling message actions");
 283         for (var action : queuedActions) {
 284             logger.debug("Executing action {}", action.getClass().getSimpleName());
 285             try {
 286                 action.execute(context);
 287             } catch (Throwable e) {
 288                 logger.warn("Message action failed.", e);
 289             }
 290         }
 291     }
 292
 293     private void onWebSocketStateChange(final WebSocketConnectionState s) {
 294         if (s.equals(WebSocketConnectionState.AUTHENTICATION_FAILED)) {
 295             account.setRegistered(false);
 296             authenticationFailureListener.call();
 297         }
 298     }
 299
 300     public interface Callable {
 301
 302         void call();
 303     }
 304 }