node_modules: update (#338)

Co-authored-by: dawidd6 <9713907+dawidd6@users.noreply.github.com>

node_modules/nodemailer/dist/cjs/smtp-pool/index.js

@@ -43,6 +43,10 @@ const index_js_2 = __importDefault(require("../well-known/index.js"));
 const shared = __importStar(require("../shared/index.js"));
 const errors = __importStar(require("../errors.js"));
 const packageData = __importStar(require("../package-info.js"));
+/** First delay before a requeued message is retried, doubled on every further requeue */
+const REQUEUE_BASE_DELAY = 50;
+/** Upper bound for the requeue delay */
+const REQUEUE_MAX_DELAY = 2000;
 /**
  * Creates a SMTP pool transport object for Nodemailer
  *
@@ -74,6 +78,8 @@ class SMTPPool extends node_events_1.EventEmitter {
         );
         this.options.maxConnections = this.options.maxConnections || 5;
         this.options.maxMessages = this.options.maxMessages || 100;
+        // a default bound, a server that closes every connection before the greeting would otherwise be retried forever
+        this.options.maxRequeues = typeof this.options.maxRequeues === 'number' ? this.options.maxRequeues : 5;
         this.logger = shared.getLogger(this.options, {
             component: this.options.component || 'smtp-pool'
         });
@@ -117,6 +123,10 @@ class SMTPPool extends node_events_1.EventEmitter {
      */
     send(mail, callback) {
         if (this._closed) {
+            // Mail.sendMail ignores the return value, so without a callback its promise would never settle
+            const err = new Error('Connection pool was closed');
+            err.code = errors.ECONNECTION;
+            setImmediate(() => callback(err));
             return false;
         }
         this._queue.push({
@@ -330,15 +340,22 @@ class SMTPPool extends node_events_1.EventEmitter {
                 // Note that we must wait a bit.. because the callback of the 'error' handler might be called
                 // in the next event loop
                 setTimeout(() => {
+                    let delay = 0;
                     if (connection.queueEntry) {
                         if (this._shouldRequeuOnConnectionClose(connection.queueEntry)) {
-                            this._requeueEntryOnConnectionClose(connection);
+                            delay = this._requeueEntryOnConnectionClose(connection);
                         }
                         else {
                             this._failDeliveryOnConnectionClose(connection);
                         }
                     }
-                    this._continueProcessing();
+                    if (delay) {
+                        // back off, a server that keeps dropping connections is not hammered
+                        setTimeout(() => this._continueProcessing(), delay);
+                    }
+                    else {
+                        this._continueProcessing();
+                    }
                 }, 50);
             }
             else {
@@ -353,7 +370,7 @@ class SMTPPool extends node_events_1.EventEmitter {
     }
     /** @internal */
     _shouldRequeuOnConnectionClose(queueEntry) {
-        if (this.options.maxRequeues === undefined || this.options.maxRequeues < 0) {
+        if (this.options.maxRequeues < 0) {
             return true;
         }
         return queueEntry.requeueAttempts < this.options.maxRequeues;
@@ -362,7 +379,9 @@ class SMTPPool extends node_events_1.EventEmitter {
     _failDeliveryOnConnectionClose(connection) {
         if (connection.queueEntry && connection.queueEntry.callback) {
             try {
-                connection.queueEntry.callback(new Error('Reached maximum number of retries after connection was closed'));
+                const err = new Error('Reached maximum number of retries after connection was closed');
+                err.code = errors.ECONNECTION;
+                connection.queueEntry.callback(err);
             }
             catch (E) {
                 this.logger.error({
@@ -377,6 +396,7 @@ class SMTPPool extends node_events_1.EventEmitter {
     }
     /** @internal */
     _requeueEntryOnConnectionClose(connection) {
+        const delay = Math.min(REQUEUE_BASE_DELAY * 2 ** connection.queueEntry.requeueAttempts, REQUEUE_MAX_DELAY);
         connection.queueEntry.requeueAttempts += 1;
         this.logger.debug({
             tnx: 'pool',
@@ -386,6 +406,7 @@ class SMTPPool extends node_events_1.EventEmitter {
         }, 'Re-queued message <%s> for #%s. Attempt: #%s', connection.queueEntry.messageId, connection.id, connection.queueEntry.requeueAttempts);
         this._queue.unshift(connection.queueEntry);
         connection.queueEntry = false;
+        return delay;
     }
     /**
      * Continue to process message if the pool hasn't closed
@@ -506,10 +527,15 @@ class SMTPPool extends node_events_1.EventEmitter {
                 connection.quit();
                 return done(null, true);
             };
-            connection.connect(() => {
+            connection.connect(err => {
                 if (returned) {
                     return;
                 }
+                if (err) {
+                    returned = true;
+                    connection.close();
+                    return done(err);
+                }
                 if (auth && (connection.allowsAuth || options.forceAuth)) {
                     connection.login(auth, err => {
                         if (returned) {