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node-red/nodes/io/31-tcpin.js

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2013-09-05 16:02:48 +02:00
/**
* Copyright 2013 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.
**/
var RED = require("../../red/red");
var reConnect = RED.settings.socketReconnectTime||10000;
var net = require('net');
function TcpIn(n) {
RED.nodes.createNode(this,n);
this.host = n.host;
this.port = n.port * 1;
this.topic = n.topic;
this.base64 = n.base64;
this.server = n.server;
var node = this;
if (!node.server) {
var client;
var to;
function setupTcpClient() {
node.log('connecting to port '+node.port);
client = net.connect(node.port, node.host, function() {
node.log("input connected to "+node.host+":"+node.port);
});
client.on('data', function (data) {
var msg;
if (node.base64) { msg = { topic:node.topic, payload:new Buffer(data).toString('base64') }; }
else { msg = {topic:node.topic, payload:data}; }
node.send(msg);
});
client.on('end', function() {
node.log("ended");
});
client.on('close', function() {
client.destroy();
node.log('closed');
to = setTimeout(setupTcpClient, reConnect);
});
client.on('error', function(err) {
node.log('error : '+err);
//to = setTimeout(setupTcpClient, reConnect);
});
}
setupTcpClient();
this._close = function() {
client.end();
clearTimeout(to);
node.log('input stopped');
}
}
else {
var server = net.createServer(function (socket) {
var buffer = null;
socket.on('data', function (chunk) {
//if (buffer == null) {
// buffer = chunk;
//} else {
//buffer = Buffer.concat([buffer,chunk]);
var msg = {topic:node.topic, payload:chunk, fromip:socket.remoteAddress+':'+socket.remotePort};
node.send(msg);
//}
});
socket.on('end', function() {
var msg = {topic:node.topic, payload:buffer, fromip:socket.remoteAddress+':'+socket.remotePort};
node.send(msg);
});
});
server.listen(node.port);
node.log('socket input on port '+node.port);
this._close = function() {
server.close();
node.log('socket input stopped');
}
}
}
RED.nodes.registerType("tcp in",TcpIn);
TcpIn.prototype.close = function() {
this._close();
}