module.exports = function(RED) { "use strict"; var reconnect = RED.settings.mysqlReconnectTime || 20000; var mysqldb = require('mysql'); function MySQLNode(n) { RED.nodes.createNode(this,n); this.host = n.host; this.port = n.port; this.tz = n.tz || "local"; this.charset = (n.charset || "UTF8_GENERAL_CI").toUpperCase(); this.connected = false; this.connecting = false; this.dbname = n.db; this.setMaxListeners(0); var node = this; function checkVer() { node.pool.query("SELECT version();", [], function(err, rows, fields) { if (err) { node.error(err); node.status({fill:"red",shape:"ring",text:"Bad Ping"}); doConnect(); } }); } function doConnect() { node.connecting = true; node.emit("state","connecting"); if (!node.pool) { node.pool = mysqldb.createPool({ host : node.host, port : node.port, user : node.credentials.user, password : node.credentials.password, database : node.dbname, timezone : node.tz, insecureAuth: true, multipleStatements: true, connectionLimit: 50, timeout: 30000, connectTimeout: 30000, charset: node.charset }); } node.pool.getConnection(function(err, connection) { node.connecting = false; if (err) { node.emit("state",err.code); node.error(err); node.tick = setTimeout(doConnect, reconnect); } else { node.connection = connection; node.connected = true; node.emit("state","connected"); node.connection.on('error', function(err) { node.connected = false; node.connection.release(); node.emit("state",err.code); if (err.code === 'PROTOCOL_CONNECTION_LOST') { doConnect(); // silently reconnect... } else if (err.code === 'ECONNRESET') { doConnect(); // silently reconnect... } else { node.error(err); doConnect(); } }); if (!node.check) { node.check = setInterval(checkVer, 290000); } } }); } this.connect = function() { if (!this.connected && !this.connecting) { doConnect(); } } this.on('close', function(done) { if (this.tick) { clearTimeout(this.tick); } if (this.check) { clearInterval(this.check); } node.connected = false; // node.connection.release(); node.emit("state"," "); node.pool.end(function(err) { done(); }); }); } RED.nodes.registerType("MySQLdatabase",MySQLNode, { credentials: { user: {type: "text"}, password: {type: "password"} } }); function MysqlDBNodeIn(n) { RED.nodes.createNode(this,n); this.mydb = n.mydb; this.mydbConfig = RED.nodes.getNode(this.mydb); this.status({}); if (this.mydbConfig) { this.mydbConfig.connect(); var node = this; var busy = false; var status = {}; node.mydbConfig.on("state", function(info) { if (info === "connecting") { node.status({fill:"grey",shape:"ring",text:info}); } else if (info === "connected") { node.status({fill:"green",shape:"dot",text:info}); } else { if (info === "ECONNREFUSED") { info = "connection refused"; } if (info === "PROTOCOL_CONNECTION_LOST") { info = "connection lost"; } node.status({fill:"red",shape:"ring",text:info}); } }); node.on("input", function(msg) { if (node.mydbConfig.connected) { if (typeof msg.topic === 'string') { //console.log("query:",msg.topic); var bind = []; if (Array.isArray(msg.payload)) { bind = msg.payload; } else if (typeof msg.payload === 'object' && msg.payload !== null) { bind = msg.payload; node.mydbConfig.connection.config.queryFormat = function(query, values) { if (!values) { return query; } return query.replace(/\:(\w+)/g, function(txt, key) { if (values.hasOwnProperty(key)) { return this.escape(values[key]); } return txt; }.bind(this)); }; } node.mydbConfig.connection.query(msg.topic, bind, function(err, rows) { if (err) { status = {fill:"red",shape:"ring",text:"Error: "+err.code}; node.status(status); node.error(err,msg); } else { if (rows.constructor.name === "OkPacket") { msg.payload = JSON.parse(JSON.stringify(rows)); } else if (rows.constructor.name === "Array") { msg.payload = rows.map(v => Object.assign({}, v)); } else { msg.payload = rows; } node.send(msg); status = {fill:"green",shape:"dot",text:"OK"}; node.status(status); } // if (node.mydbConfig.pool._freeConnections.indexOf(node.mydbConfig.connection) === -1) { // node.mydbConfig.connection.release(); // } }); } else { if (typeof msg.topic !== 'string') { node.error("msg.topic : the query is not defined as a string"); } } } else { node.error("Database not connected",msg); status = {fill:"red",shape:"ring",text:"not yet connected"}; } if (!busy) { busy = true; node.status(status); node.tout = setTimeout(function() { busy = false; node.status(status); },500); } }); node.on('close', function() { if (node.tout) { clearTimeout(node.tout); } node.mydbConfig.removeAllListeners(); node.status({}); }); } else { this.error("MySQL database not configured"); } } RED.nodes.registerType("mysql",MysqlDBNodeIn); }