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68-mysql.js
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68-mysql.js
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module.exports = function(RED) {
"use strict";
var reconnect = RED.settings.mysqlReconnectTime || 20000;
var mysqldb = require('mysql2');
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:RED._("mysql.status.badping")});
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: RED.settings.mysqlConnectionLimit || 50,
connectTimeout: 30000,
charset: node.charset,
decimalNumbers: true
});
}
// connection test
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.connected = true;
node.emit("state","connected");
if (!node.check) { node.check = setInterval(checkVer, 290000); }
connection.release();
}
});
}
node.connect = function() {
if (!node.connected && !node.connecting) {
doConnect();
}
}
node.on('close', function(done) {
if (node.tick) { clearTimeout(node.tick); }
if (node.check) { clearInterval(node.check); }
// node.connection.release();
node.emit("state"," ");
if (node.connected) {
node.connected = false;
node.pool.end(function(err) { done(); });
}
else {
delete node.pool;
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 {
node.status({fill:"red",shape:"ring",text:info});
}
});
node.on("input", function(msg, send, done) {
send = send || function() { node.send.apply(node,arguments) };
if (node.mydbConfig.connected) {
if (typeof msg.topic === 'string') {
//console.log("query:",msg.topic);
node.mydbConfig.pool.getConnection(function (err, conn) {
if (err) {
if (conn) {
conn.release()
}
status = { fill: "red", shape: "ring", text: RED._("mysql.status.error") + ": " + err.code };
node.status(status);
node.error(err, msg);
if (done) { done(); }
return
}
var bind = [];
if (Array.isArray(msg.payload)) {
bind = msg.payload;
}
else if (typeof msg.payload === 'object' && msg.payload !== null) {
bind = msg.payload;
}
conn.config.queryFormat = Array.isArray(msg.payload) ? null : customQueryFormat
conn.query(msg.topic, bind, function (err, rows) {
conn.release()
if (err) {
status = { fill: "red", shape: "ring", text: RED._("mysql.status.error") + ": " + err.code };
node.status(status);
node.error(err, msg);
}
else {
msg.payload = rows;
send(msg);
status = { fill: "green", shape: "dot", text: RED._("mysql.status.ok") };
node.status(status);
}
if (done) { done(); }
});
})
}
else {
if (typeof msg.topic !== 'string') { node.error("msg.topic : "+RED._("mysql.errors.notstring")); done(); }
}
}
else {
node.error(RED._("mysql.errors.notconnected"),msg);
status = {fill:"red",shape:"ring",text:RED._("mysql.status.notconnected")};
if (done) { done(); }
}
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(RED._("mysql.errors.notconfigured"));
}
}
RED.nodes.registerType("mysql",MysqlDBNodeIn);
}
function customQueryFormat(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));
}