MQTT topic validation and lockup fix

closes #3557

packages/node_modules/@node-red/nodes/core/network/10-mqtt.html

@@ -452,7 +452,17 @@
         }
         return defaultContentType || 'none'
     }
-
+    /**
+     * Test a topic string is valid for publishing
+     * @param {string} topic
+     * @returns `true` if it is a valid topic
+     */
+    function validateMQTTPublishTopic(topic) {
+        if(!topic || topic == "") {
+            return true;
+        }
+        return !/[\+#\b\f\n\r\t\v\0]/.test(topic);
+    }
     RED.nodes.registerType('mqtt-broker',{
         category: 'config',
         defaults: {
@@ -487,17 +497,17 @@
                 label: RED._("node-red:mqtt.label.keepalive"),
                 validate:RED.validators.number(false)},
             cleansession: {value: true},
-            birthTopic: {value:""},
+            birthTopic: {value:"", validate:validateMQTTPublishTopic},
             birthQos: {value:"0"},
             birthRetain: {value:false},
             birthPayload: {value:""},
             birthMsg: { value: {}},
-            closeTopic: {value:""},
+            closeTopic: {value:"", validate:validateMQTTPublishTopic},
             closeQos: {value:"0"},
             closeRetain: {value:false},
             closePayload: {value:""},
             closeMsg: { value: {}},
-            willTopic: {value:""},
+            willTopic: {value:"", validate:validateMQTTPublishTopic},
             willQos: {value:"0"},
             willRetain: {value:false},
             willPayload: {value:""},
@@ -856,7 +866,7 @@
         category: 'network',
         defaults: {
             name: {value:""},
-            topic: {value:""},
+            topic: {value:"", validate:validateMQTTPublishTopic},
             qos: {value:""},
             retain: {value:""},
             respTopic: {value:""},

packages/node_modules/@node-red/nodes/core/network/10-mqtt.js

@@ -91,12 +91,21 @@ module.exports = function(RED) {
     }
 
     /**
-     * Test a topic string is valid
+     * Test a topic string is valid for subscription
      * @param {string} topic
      * @returns `true` if it is a valid topic
      */
     function isValidSubscriptionTopic(topic) {
-        return /^(#$|(\+|[^+#]*)(\/(\+|[^+#]*))*(\/(\+|#|[^+#]*))?$)/.test(topic)
+        return /^(#$|(\+|[^+#]*)(\/(\+|[^+#]*))*(\/(\+|#|[^+#]*))?$)/.test(topic);
+    }
+
+    /**
+     * Test a topic string is valid for publishing
+     * @param {string} topic
+     * @returns `true` if it is a valid topic
+     */
+    function isValidPublishTopic(topic) {
+        return !/[\+#\b\f\n\r\t\v\0]/.test(topic);
     }
 
     /**
@@ -340,38 +349,15 @@ module.exports = function(RED) {
                     msg.messageExpiryInterval = node.messageExpiryInterval;
                 }
             }
-            if (msg.userProperties && typeof msg.userProperties !== "object") {
-                delete msg.userProperties;
-            }
-            if (hasProperty(msg, "topicAlias") && !isNaN(msg.topicAlias) && (msg.topicAlias === 0 || bsp.topicAliasMaximum === 0 || msg.topicAlias > bsp.topicAliasMaximum)) {
-                delete msg.topicAlias;
-            }
-
             if (hasProperty(msg, "payload")) {
-
+                // send the message
-                //check & sanitise topic
+                node.brokerConn.publish(msg, function(err) {
-                let topicOK = hasProperty(msg, "topic") && (typeof msg.topic === "string") && (msg.topic !== "");
+                    if(err && err.warn) {
-
+                        node.warn(err);
-                if (!topicOK && v5) {
+                        return;
-                    //NOTE: A value of 0 (in server props topicAliasMaximum) indicates that the Server does not accept any Topic Aliases on this connection
-                    if (hasProperty(msg, "topicAlias") && !isNaN(msg.topicAlias) && msg.topicAlias >= 0 && bsp.topicAliasMaximum && bsp.topicAliasMaximum >= msg.topicAlias) {
-                        topicOK = true;
-                        msg.topic = ""; //must be empty string
-                    } else if (hasProperty(msg, "responseTopic") && (typeof msg.responseTopic === "string") && (msg.responseTopic !== "")) {
-                        //TODO: if topic is empty but responseTopic has a string value, use that instead. Is this desirable?
-                        topicOK = true;
-                        msg.topic = msg.responseTopic;
-                        //TODO: delete msg.responseTopic - to prevent it being resent?
                     }
-                }
+                    done(err);
-                topicOK = topicOK && !/[\+#\b\f\n\r\t\v\0]/.test(msg.topic);
+                }); 
-
-                if (topicOK) {
-                    node.brokerConn.publish(msg, done); // send the message
-                } else {
-                    node.warn(RED._("mqtt.errors.invalid-topic"));
-                    done();
-                }
             } else {
                 done();
             }
@@ -827,31 +813,46 @@ module.exports = function(RED) {
             }
         };
         node.disconnect = function (callback) {
-            const _callback = function (resetNodeConnectedState) {
+            const _callback = function () {
-                setStatusDisconnected(node, true);
+                if(node.connected || node.connecting) {
-                if(resetNodeConnectedState) {
+                    setStatusDisconnected(node, true);
-                    node.closing = true;
-                    node.connecting = false;
-                    node.connected = false;
                 }
+                if(node.client) { node.client.removeAllListeners(); }
+                node.connecting = false;
+                node.connected = false;
                 callback && typeof callback == "function" && callback();
             };
+            if(!node.client) { return _callback(); }
+            if(node.closing) { return _callback(); }
 
-            if(node.closing) {
+            let waitEnd = (client, ms) => {
-                return _callback(false);
+                return new Promise( (resolve, reject) => {
-            }
+                    node.closing = true;
-            var endCallBack = function endCallBack() {
+                    if(!client) { 
-            }
+                        resolve();
+                     } else {
+                         const t = setTimeout(reject, ms);
+                         client.end(() => {
+                             clearTimeout(t);
+                             resolve()
+                         });
+                     }
+                });
+            };
             if(node.connected && node.closeMessage) {
                 node.publish(node.closeMessage, function (err) {
-                    node.client.end(endCallBack);
+                    waitEnd(node.client, 2000).then(() => {
-                    _callback(true);
+                        _callback();
+                    }).catch((e) => {
+                        _callback();
+                    })
                 });
-            } else if(node.connected) {
-                node.client.end(endCallBack);
-                _callback(true);
             } else {
-                _callback(false);
+                waitEnd(node.client, 2000).then(() => {
+                    _callback();
+                }).catch((e) => {
+                    _callback();
+                })
             }
         }
         node.subscriptionIds = {};
@@ -933,8 +934,18 @@ module.exports = function(RED) {
                     qos: msg.qos || 0,
                     retain: msg.retain || false
                 };
+                let topicOK = hasProperty(msg, "topic") && (typeof msg.topic === "string") && (isValidPublishTopic(msg.topic));
                 //https://github.com/mqttjs/MQTT.js/blob/master/README.md#mqttclientpublishtopic-message-options-callback
                 if(node.options.protocolVersion == 5) {
+                    const bsp = node.serverProperties || {};
+                    if (msg.userProperties && typeof msg.userProperties !== "object") {
+                        delete msg.userProperties;
+                    }
+                    if (hasProperty(msg, "topicAlias") && !isNaN(Number(msg.topicAlias))) {
+                        msg.topicAlias = parseInt(msg.topicAlias);
+                    } else {
+                        delete msg.topicAlias;
+                    }
                     options.properties = options.properties || {};
                     setStrProp(msg, options.properties, "responseTopic");
                     setBufferProp(msg, options.properties, "correlationData");
@@ -944,29 +955,46 @@ module.exports = function(RED) {
                     setIntProp(msg, options.properties, "topicAlias", 1, node.serverProperties.topicAliasMaximum || 0);
                     setBoolProp(msg, options.properties, "payloadFormatIndicator");
                     //FUTURE setIntProp(msg, options.properties, "subscriptionIdentifier", 1, 268435455);
-                    if (options.properties.topicAlias) {
+
-                        if (!node.topicAliases.hasOwnProperty(options.properties.topicAlias) && msg.topic == "") {
+                    //check & sanitise topic
+                    if (topicOK && options.properties.topicAlias) {
+                        let aliasValid = (bsp.topicAliasMaximum && bsp.topicAliasMaximum >= options.properties.topicAlias);
+                        if (!aliasValid) {
                             done("Invalid topicAlias");
                             return
                         }
                         if (node.topicAliases[options.properties.topicAlias] === msg.topic) {
-                            msg.topic = ""
+                            msg.topic = "";
                         } else {
-                            node.topicAliases[options.properties.topicAlias] = msg.topic
+                            node.topicAliases[options.properties.topicAlias] = msg.topic;
                         }
+                    } else if (!msg.topic && options.properties.responseTopic) {
+                        msg.topic = msg.responseTopic;
+                        topicOK = isValidPublishTopic(msg.topic);
+                        delete msg.responseTopic; //prevent responseTopic being resent?
                     }
                 }
 
-                node.client.publish(msg.topic, msg.payload, options, function(err) {
+                if (topicOK) {
-                    done && done(err);
+                    node.client.publish(msg.topic, msg.payload, options, function(err) {
-                    return
+                        done && done(err);
-                });
+                        return
+                    });
+                } else {
+                    const error = new Error(RED._("mqtt.errors.invalid-topic"));
+                    error.warn = true;
+                    done(error);
+                }
             }
         };
 
         node.on('close', function(done) {
-            node.closing = true;
+            node.disconnect(function() {
-            node.disconnect(done);
+                if(node.client) {
+                    node.client.removeAllListeners();
+                }
+                done();
+            }, true);
         });
 
     }
@@ -1143,6 +1171,7 @@ module.exports = function(RED) {
                         node.brokerConn.unsubscribe(node.topic,node.id, removed);
                     }
                     node.brokerConn.deregister(node, done);
+                    node.brokerConn = null;
                 } else {
                     done();
                 }
@@ -1207,6 +1236,7 @@ module.exports = function(RED) {
             node.on('close', function(done) {
                 if (node.brokerConn) {
                     node.brokerConn.deregister(node,done);
+                    node.brokerConn = null;
                 } else {
                     done();
                 }

test/nodes/core/network/21-mqtt_spec.js

@@ -73,8 +73,7 @@ describe('MQTT Nodes', function () {
             done();
         });
     }
-
+    // Conditional test runner (only run if skipTests=false) 
-    /** Conditional test runner (only run if skipTests=false) */
     function itConditional(title, test) {
         return !skipTests ? it(title, test) : it.skip(title, test);
     }
@@ -444,7 +443,8 @@ describe('MQTT Nodes', function () {
             const mqttOut = helper.getNode("mqtt.out");
             const mqttBroker1 = helper.getNode("mqtt.broker1");
             const mqttBroker2 = helper.getNode("mqtt.broker2");
-            waitBrokerConnect([mqttBroker1, mqttBroker2], function connected() {
+            waitBrokerConnect([mqttBroker1, mqttBroker2])
+            .then(() => {
                 //connected - add the on handler and call to disconnect
                 helperNode.on("input", function (msg) {
                     try {
@@ -458,6 +458,7 @@ describe('MQTT Nodes', function () {
                 })
                 mqttOut.receive({ "action": "disconnect" });//close broker2
             })
+            .catch(done);
         });
     });
     itConditional('should publish will message', function (done) {
@@ -473,7 +474,8 @@ describe('MQTT Nodes', function () {
             const helperNode = helper.getNode("helper.node");
             const mqttBroker1 = helper.getNode("mqtt.broker1");
             const mqttBroker2 = helper.getNode("mqtt.broker2");
-            waitBrokerConnect([mqttBroker1, mqttBroker2], function connected() {
+            waitBrokerConnect([mqttBroker1, mqttBroker2])
+            .then(() => {
                 //connected - add the on handler and call to disconnect
                 helperNode.on("input", function (msg) {
                     try {
@@ -487,6 +489,7 @@ describe('MQTT Nodes', function () {
                 });
                 mqttBroker2.client.end(true); //force closure
             })
+            .catch(done);
         });
     });
     itConditional('should publish will message with V5 properties', function (done) {
@@ -528,7 +531,8 @@ describe('MQTT Nodes', function () {
             const helperNode = helper.getNode("helper.node");
             const mqttBroker1 = helper.getNode("mqtt.broker1");
             const mqttBroker2 = helper.getNode("mqtt.broker2");
-            waitBrokerConnect([mqttBroker1, mqttBroker2], function connected() {
+            waitBrokerConnect([mqttBroker1, mqttBroker2])
+            .then(() => {
                 //connected - add the on handler and call to disconnect
                 helperNode.on("input", function (msg) {
                     try {
@@ -540,6 +544,7 @@ describe('MQTT Nodes', function () {
                 });
                 mqttBroker2.client.end(true); //force closure
             })
+            .catch(done);
         });
     });
     //#endregion  ADVANCED TESTS
@@ -597,17 +602,24 @@ function testSendRecv(brokerOptions, inNodeOptions, outNodeOptions, options, hoo
                     }
                 });
             }
-            waitBrokerConnect(mqttBroker, function () {
+            waitBrokerConnect(mqttBroker)
+            .then(() => {
                 //finally, connected!
                 if (hooks.afterConnect) {
                     let handled = hooks.afterConnect(helperNode, mqttBroker, mqttIn, mqttOut);
                     if (handled) { return }
                 }
-                if (mqttIn.isDynamic) {
+                if(sendMsg.topic) {
-                    mqttIn.receive({ "action": "subscribe", "topic": sendMsg.topic })
+                    if (mqttIn.isDynamic) {
+                        mqttIn.receive({ "action": "subscribe", "topic": sendMsg.topic })
+                    }
+                    mqttOut.receive(sendMsg);
                 }
-                mqttOut.receive(sendMsg);
             })
+            .catch((e) => {
+                if (hooks.done) { hooks.done(e); }
+                else { throw e; }
+            });
         } catch (err) {
             if (hooks.done) { hooks.done(err); }
             else { throw err; }
@@ -743,22 +755,33 @@ function compareMsgToExpected(msg, expectMsg) {
     if (hasProperty(expectMsg, "messageExpiryInterval")) { msg.should.have.property("messageExpiryInterval", expectMsg.messageExpiryInterval); }
 }
 
-function waitBrokerConnect(broker, callback, timeLimit) {
+function waitBrokerConnect(broker, timeLimit) {
-    timeLimit = timeLimit || 2000;
+
-    const brokers = Array.isArray(broker) ? broker : [broker];
+    let waitConnected = (broker, timeLimit) => {
-    wait();
+        const brokers = Array.isArray(broker) ? broker : [broker];
-    function wait() {
+        timeLimit = timeLimit || 1000;
-        if (brokers.every(e => e.connected == true)) {
+        let timer, resolved = false;
-            callback(); //yey - connected!
+        return new Promise( (resolve, reject) => {
-        } else {
+            timer = wait();
-            timeLimit = timeLimit - 15;
+            function wait() {
-            if (timeLimit <= 0) {
+                if (brokers.every(e => e.connected == true)) {
-                throw new Error("Timeout waiting broker connect")
+                    resolved = true;
+                    clearTimeout(timer);
+                    resolve();
+                } else {
+                    timeLimit = timeLimit - 15;
+                    if (timeLimit <= 0) {
+                        if(!resolved) {
+                            reject("Timeout waiting broker connect")
+                        }
+                    }
+                    timer = setTimeout(wait, 15);
+                    return timer;
+                }
             }
-            setTimeout(wait, 15);
+        });
-            return;
+    };
-        }
+    return waitConnected(broker, timeLimit);
-    }
 }
 
 function hasProperty(obj, propName) {