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node-red-nodes/io/stomp/18-stomp.js

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/**
* Copyright 2014 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
module.exports = function(RED) {
"use strict";
var StompClient = require('stomp-client');
var querystring = require('querystring');
function StompServerNode(n) {
RED.nodes.createNode(this,n);
this.server = n.server;
this.port = n.port;
this.name = n.name;
var credentials = RED.nodes.getCredentials(n.id);
if (credentials) {
this.username = credentials.user;
this.password = credentials.password;
}
}
RED.nodes.registerType("stomp-server",StompServerNode);
RED.httpAdmin.get('/stomp-server/:id',function(req,res) {
var credentials = RED.nodes.getCredentials(req.params.id);
if (credentials) {
res.send(JSON.stringify({user:credentials.user,hasPassword:(credentials.password&&credentials.password!=="")}));
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} else {
res.send(JSON.stringify({}));
}
});
RED.httpAdmin.delete('/stomp-server/:id',function(req,res) {
RED.nodes.deleteCredentials(req.params.id);
res.send(200);
});
RED.httpAdmin.post('/stomp-server/:id',function(req,res) {
var body = "";
req.on('data', function(chunk) {
body+=chunk;
});
req.on('end', function(){
var newCreds = querystring.parse(body);
var credentials = RED.nodes.getCredentials(req.params.id)||{};
if (newCreds.user == null || newCreds.user === "") {
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delete credentials.user;
} else {
credentials.user = newCreds.user;
}
if (newCreds.password === "") {
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delete credentials.password;
} else {
credentials.password = newCreds.password||credentials.password;
}
RED.nodes.addCredentials(req.params.id,credentials);
res.send(200);
});
});
function StompInNode(n) {
RED.nodes.createNode(this,n);
this.server = n.server;
this.topic = n.topic;
this.serverConfig = RED.nodes.getNode(this.server);
this.host = this.serverConfig.server;
this.port = this.serverConfig.port;
this.userid = this.serverConfig.username;
this.password = this.serverConfig.password;
var node = this;
var msg = {topic:this.topic};
var closing = false;
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node.client = new StompClient(node.host, node.port, node.userid, node.password, '1.0');
node.status({fill:"grey",shape:"ring",text:"connecting"});
var doConnect = function() {
node.client.connect(function(sessionId) {
node.status({fill:"green",shape:"dot",text:"connected"});
node.log('subscribed to: '+node.topic);
node.client.subscribe(node.topic, function(body, headers) {
msg.payload = JSON.parse(body);
node.send(msg);
});
}, function(error) {
node.status({fill:"grey",shape:"dot",text:"error"});
node.warn(error);
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});
}
node.client.on("disconnect", function() {
node.status({fill:"red",shape:"ring",text:"disconnected"});
if (!closing) {
setTimeout( function () { doConnect(); }, 15000);
}
});
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node.client.on("error", function(error) {
node.status({fill:"grey",shape:"dot",text:"error"});
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node.log(error);
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});
doConnect();
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node.on("close", function(done) {
closing = true;
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if (node.client) {
node.client.on("disconnect", function() {
done();
});
//node.client.unsubscribe(node.topic);
node.client.disconnect();
} else { done(); }
});
}
RED.nodes.registerType("stomp in",StompInNode);
function StompOutNode(n) {
RED.nodes.createNode(this,n);
this.server = n.server;
this.topic = n.topic;
this.serverConfig = RED.nodes.getNode(this.server);
this.host = this.serverConfig.server;
this.port = this.serverConfig.port;
this.userid = this.serverConfig.username;
this.password = this.serverConfig.password;
var node = this;
var msg = {topic:this.topic};
var closing = false;
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node.client = new StompClient(node.host, node.port, node.userid, node.password, '1.0');
node.status({fill:"grey",shape:"ring",text:"connecting"});
node.client.connect( function(sessionId) {
node.status({fill:"green",shape:"dot",text:"connected"});
}, function(error) {
node.status({fill:"grey",shape:"dot",text:"error"});
node.warn(error);
});
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node.client.on("disconnect", function() {
node.status({fill:"red",shape:"ring",text:"disconnected"});
if (!closing) {
setTimeout( function () { node.client.connect(); }, 15000);
}
});
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node.client.on("error", function(error) {
node.log(error);
});
node.on("input", function(msg) {
node.client.publish(node.topic || msg.topic, msg.payload);
});
node.on("close", function(done) {
closing = true;
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if (client) { client.disconnect(); }
});
}
RED.nodes.registerType("stomp out",StompOutNode);
}