167 lines
6.1 KiB
JavaScript
167 lines
6.1 KiB
JavaScript
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module.exports = function(RED) {
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"use strict";
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var reconnect = RED.settings.mysqlReconnectTime || 20000;
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var mysqldb = require('mysql');
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function MySQLNode(n) {
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RED.nodes.createNode(this,n);
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this.host = n.host;
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this.port = n.port;
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this.tz = n.tz || "local";
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this.connected = false;
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this.connecting = false;
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this.dbname = n.db;
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this.setMaxListeners(0);
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var node = this;
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function checkVer() {
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node.connection.query("SELECT version();", [], function(err, rows) {
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if (err) {
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node.connection.release();
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node.error(err);
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node.status({fill:"red",shape:"ring",text:"Bad Ping"});
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doConnect();
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}
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});
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}
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function doConnect() {
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node.connecting = true;
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node.emit("state","connecting");
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if (!node.pool) {
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node.pool = mysqldb.createPool({
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host : node.host,
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port : node.port,
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user : node.credentials.user,
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password : node.credentials.password,
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database : node.dbname,
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timezone : node.tz,
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insecureAuth: true,
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multipleStatements: true,
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connectionLimit: 25
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});
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}
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node.pool.getConnection(function(err, connection) {
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node.connecting = false;
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if (err) {
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node.emit("state",err.code);
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node.error(err);
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node.tick = setTimeout(doConnect, reconnect);
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}
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else {
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node.connection = connection;
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node.connected = true;
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node.emit("state","connected");
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node.connection.on('error', function(err) {
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node.connected = false;
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node.connection.release();
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node.emit("state",err.code);
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if (err.code === 'PROTOCOL_CONNECTION_LOST') {
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doConnect(); // silently reconnect...
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}
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else if (err.code === 'ECONNRESET') {
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doConnect(); // silently reconnect...
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}
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else {
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node.error(err);
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doConnect();
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}
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});
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if (!node.check) { node.check = setInterval(checkVer, 290000); }
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}
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});
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}
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this.connect = function() {
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if (!this.connected && !this.connecting) {
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doConnect();
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}
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}
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this.on('close', function (done) {
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if (this.tick) { clearTimeout(this.tick); }
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if (this.check) { clearInterval(this.check); }
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node.connected = false;
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node.emit("state"," ");
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node.pool.end(function (err) { done(); });
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});
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}
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RED.nodes.registerType("MySQLdatabase",MySQLNode, {
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credentials: {
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user: {type: "text"},
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password: {type: "password"}
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}
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});
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function MysqlDBNodeIn(n) {
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RED.nodes.createNode(this,n);
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this.mydb = n.mydb;
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this.mydbConfig = RED.nodes.getNode(this.mydb);
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if (this.mydbConfig) {
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this.mydbConfig.connect();
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var node = this;
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var busy = false;
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var status = {};
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node.mydbConfig.on("state", function(info) {
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if (info === "connecting") { node.status({fill:"grey",shape:"ring",text:info}); }
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else if (info === "connected") { node.status({fill:"green",shape:"dot",text:info}); }
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else {
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if (info === "ECONNREFUSED") { info = "connection refused"; }
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if (info === "PROTOCOL_CONNECTION_LOST") { info = "connection lost"; }
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node.status({fill:"red",shape:"ring",text:info});
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}
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});
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node.on("input", function(msg) {
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if (node.mydbConfig.connected) {
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if (typeof msg.topic === 'string') {
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var bind = Array.isArray(msg.payload) ? msg.payload : [];
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node.mydbConfig.connection.query(msg.topic, bind, function(err, rows) {
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if (err) {
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node.error(err,msg);
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status = {fill:"red",shape:"ring",text:"Error"};
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}
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else {
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if (rows.constructor.name === "OkPacket") {
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msg.payload = JSON.parse(JSON.stringify(rows));
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}
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else { msg.payload = rows; }
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node.send(msg);
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status = {fill:"green",shape:"dot",text:"OK"};
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}
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});
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}
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else {
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if (typeof msg.topic !== 'string') { node.error("msg.topic : the query is not defined as a string"); }
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}
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}
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else {
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node.error("Database not connected",msg);
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status = {fill:"red",shape:"ring",text:"not yet connected"};
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}
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if (!busy) {
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busy = true;
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node.status(status);
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node.tout = setTimeout(function() { busy = false; node.status(status); },500);
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}
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});
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node.on('close', function () {
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if (node.tout) { clearTimeout(node.tout); }
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node.mydbConfig.removeAllListeners();
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node.status({});
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});
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}
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else {
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this.error("MySQL database not configured");
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}
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}
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RED.nodes.registerType("mysql",MysqlDBNodeIn);
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}
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