mirror of https://github.com/node-red/node-red.git
480 lines
20 KiB
JavaScript
480 lines
20 KiB
JavaScript
/**
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* Copyright 2013,2014 IBM Corp.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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**/
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module.exports = function(RED) {
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"use strict";
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var reconnectTime = RED.settings.socketReconnectTime||10000;
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var socketTimeout = RED.settings.socketTimeout||null;
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var net = require('net');
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var connectionPool = {};
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function TcpIn(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 * 1;
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this.topic = n.topic;
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this.stream = (!n.datamode||n.datamode=='stream'); /* stream,single*/
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this.datatype = n.datatype||'buffer'; /* buffer,utf8,base64 */
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this.newline = (n.newline||"").replace("\\n","\n").replace("\\r","\r");
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this.base64 = n.base64;
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this.server = (typeof n.server == 'boolean')?n.server:(n.server == "server");
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this.closing = false;
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var node = this;
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var count = 0;
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if (!node.server) {
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var buffer = null;
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var client;
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var reconnectTimeout;
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var end = false;
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var setupTcpClient = function() {
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node.log("connecting to "+node.host+":"+node.port);
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node.status({fill:"grey",shape:"dot",text:"connecting"});
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var id = (1+Math.random()*4294967295).toString(16);
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client = net.connect(node.port, node.host, function() {
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buffer = (node.datatype == 'buffer')? new Buffer(0):"";
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node.log("connected to "+node.host+":"+node.port);
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node.status({fill:"green",shape:"dot",text:"connected"});
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});
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connectionPool[id] = client;
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client.on('data', function (data) {
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if (node.datatype != 'buffer') {
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data = data.toString(node.datatype);
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}
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if (node.stream) {
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if ((node.datatype) === "utf8" && node.newline != "") {
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buffer = buffer+data;
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var parts = buffer.split(node.newline);
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for (var i = 0;i<parts.length-1;i+=1) {
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var msg = {topic:node.topic, payload:parts[i]};
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msg._session = {type:"tcp",id:id};
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node.send(msg);
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}
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buffer = parts[parts.length-1];
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} else {
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var msg = {topic:node.topic, payload:data};
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msg._session = {type:"tcp",id:id};
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node.send(msg);
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}
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} else {
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if ((typeof data) === "string") {
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buffer = buffer+data;
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} else {
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buffer = Buffer.concat([buffer,data],buffer.length+data.length);
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}
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}
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});
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client.on('end', function() {
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if (!node.stream || (node.datatype == "utf8" && node.newline != "" && buffer.length > 0)) {
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var msg = {topic:node.topic,payload:buffer};
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msg._session = {type:"tcp",id:id};
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if (buffer.length !== 0) {
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end = true; // only ask for fast re-connect if we actually got something
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node.send(msg);
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}
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buffer = null;
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}
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});
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client.on('close', function() {
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delete connectionPool[id];
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node.status({fill:"red",shape:"ring",text:"disconnected"});
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if (!node.closing) {
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if (end) { // if we were asked to close then try to reconnect once very quick.
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end = false;
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reconnectTimeout = setTimeout(setupTcpClient, 20);
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}
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else {
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node.log("connection lost to "+node.host+":"+node.port);
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reconnectTimeout = setTimeout(setupTcpClient, reconnectTime);
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}
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}
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});
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client.on('error', function(err) {
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node.log(err);
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});
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}
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setupTcpClient();
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this.on('close', function() {
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this.closing = true;
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client.end();
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clearTimeout(reconnectTimeout);
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});
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} else {
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var server = net.createServer(function (socket) {
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if (socketTimeout !== null) { socket.setTimeout(socketTimeout); }
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var id = (1+Math.random()*4294967295).toString(16);
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connectionPool[id] = socket;
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node.status({text:++count+" connections"});
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var buffer = (node.datatype == 'buffer')? new Buffer(0):"";
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socket.on('data', function (data) {
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if (node.datatype != 'buffer') {
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data = data.toString(node.datatype);
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}
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if (node.stream) {
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if ((typeof data) === "string" && node.newline != "") {
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buffer = buffer+data;
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var parts = buffer.split(node.newline);
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for (var i = 0;i<parts.length-1;i+=1) {
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var msg = {topic:node.topic, payload:parts[i],ip:socket.remoteAddress,port:socket.remotePort};
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msg._session = {type:"tcp",id:id};
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node.send(msg);
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}
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buffer = parts[parts.length-1];
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} else {
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var msg = {topic:node.topic, payload:data};
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msg._session = {type:"tcp",id:id};
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node.send(msg);
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}
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} else {
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if ((typeof data) === "string") {
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buffer = buffer+data;
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} else {
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buffer = Buffer.concat([buffer,data],buffer.length+data.length);
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}
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}
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});
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socket.on('end', function() {
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if (!node.stream || (node.datatype === "utf8" && node.newline !== "")) {
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if (buffer.length > 0) {
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var msg = {topic:node.topic,payload:buffer};
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msg._session = {type:"tcp",id:id};
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node.send(msg);
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}
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buffer = null;
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}
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});
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socket.on('timeout', function() {
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node.log('timeout closed socket port '+node.port);
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socket.end();
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});
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socket.on('close', function() {
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delete connectionPool[id];
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node.status({text:--count+" connections"});
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});
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socket.on('error',function(err) {
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node.log(err);
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});
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});
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server.on('error', function(err) {
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if (err) {
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node.error('unable to listen on port '+node.port+' : '+err);
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}
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});
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server.listen(node.port, function(err) {
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if (err) {
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node.error('unable to listen on port '+node.port+' : '+err);
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} else {
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node.log('listening on port '+node.port);
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node.on('close', function() {
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for (var c in connectionPool) {
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connectionPool[c].end();
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connectionPool[c].unref();
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}
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node.closing = true;
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server.close();
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node.log('stopped listening on port '+node.port);
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});
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}
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});
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}
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}
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RED.nodes.registerType("tcp in",TcpIn);
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function TcpOut(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 * 1;
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this.base64 = n.base64;
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this.doend = n.end || false;
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this.beserver = n.beserver;
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this.name = n.name;
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this.closing = false;
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var node = this;
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if (!node.beserver||node.beserver=="client") {
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var reconnectTimeout;
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var client = null;
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var connected = false;
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var end = false;
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var setupTcpClient = function() {
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node.log("connecting to "+node.host+":"+node.port);
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node.status({fill:"grey",shape:"dot",text:"connecting"});
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client = net.connect(node.port, node.host, function() {
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connected = true;
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node.log("connected to "+node.host+":"+node.port);
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node.status({fill:"green",shape:"dot",text:"connected"});
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});
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client.on('error', function (err) {
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node.log('error : '+err);
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});
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client.on('end', function (err) {
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});
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client.on('close', function() {
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node.status({fill:"red",shape:"ring",text:"disconnected"});
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connected = false;
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client.destroy();
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if (!node.closing) {
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if (end) {
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end = false;
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reconnectTimeout = setTimeout(setupTcpClient,20);
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}
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else {
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node.log("connection lost to "+node.host+":"+node.port);
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reconnectTimeout = setTimeout(setupTcpClient,reconnectTime);
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}
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}
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});
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}
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setupTcpClient();
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node.on("input", function(msg) {
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if (connected && msg.payload != null) {
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if (Buffer.isBuffer(msg.payload)) {
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client.write(msg.payload);
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} else if (typeof msg.payload === "string" && node.base64) {
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client.write(new Buffer(msg.payload,'base64'));
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} else {
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client.write(new Buffer(""+msg.payload));
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}
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if (node.doend === true) {
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end = true;
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client.end();
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}
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}
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});
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node.on("close", function() {
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this.closing = true;
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client.end();
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clearTimeout(reconnectTimeout);
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});
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} else if (node.beserver == "reply") {
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node.on("input",function(msg) {
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if (msg._session && msg._session.type == "tcp") {
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var client = connectionPool[msg._session.id];
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if (client) {
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if (Buffer.isBuffer(msg.payload)) {
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client.write(msg.payload);
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} else if (typeof msg.payload === "string" && node.base64) {
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client.write(new Buffer(msg.payload,'base64'));
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} else {
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client.write(new Buffer(""+msg.payload));
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}
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}
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}
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});
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} else {
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var connectedSockets = [];
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node.status({text:"0 connections"});
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var server = net.createServer(function (socket) {
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if (socketTimeout !== null) { socket.setTimeout(socketTimeout); }
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var remoteDetails = socket.remoteAddress+":"+socket.remotePort;
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node.log("connection from "+remoteDetails);
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connectedSockets.push(socket);
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node.status({text:connectedSockets.length+" connections"});
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socket.on('timeout', function() {
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node.log('timeout closed socket port '+node.port);
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socket.end();
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});
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socket.on('close',function() {
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node.log("connection closed from "+remoteDetails);
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connectedSockets.splice(connectedSockets.indexOf(socket),1);
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node.status({text:connectedSockets.length+" connections"});
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});
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socket.on('error',function() {
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node.log("socket error from "+remoteDetails);
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connectedSockets.splice(connectedSockets.indexOf(socket),1);
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node.status({text:connectedSockets.length+" connections"});
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});
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});
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node.on("input", function(msg) {
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if (msg.payload != null) {
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var buffer;
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if (Buffer.isBuffer(msg.payload)) {
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buffer = msg.payload;
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} else if (typeof msg.payload === "string" && node.base64) {
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buffer = new Buffer(msg.payload,'base64');
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} else {
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buffer = new Buffer(""+msg.payload);
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}
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for (var i = 0; i<connectedSockets.length;i+=1) {
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if (node.doend === true) { connectedSockets[i].end(buffer); }
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else { connectedSockets[i].write(buffer); }
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}
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}
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});
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server.on('error', function(err) {
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if (err) {
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node.error('unable to listen on port '+node.port+' : '+err);
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}
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});
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server.listen(node.port, function(err) {
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if (err) {
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node.error('unable to listen on port '+node.port+' : '+err);
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} else {
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node.log('listening on port '+node.port);
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node.on('close', function() {
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for (var c in connectedSockets) {
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connectedSockets[c].end();
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connectedSockets[c].unref();
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}
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server.close();
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node.log('stopped listening on port '+node.port);
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});
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}
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});
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}
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}
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RED.nodes.registerType("tcp out",TcpOut);
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function TcpGet(n) {
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RED.nodes.createNode(this,n);
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this.server = n.server;
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this.port = Number(n.port);
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this.out = n.out;
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this.splitc = n.splitc;
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if (this.out != "char") { this.splitc = Number(this.splitc); }
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else { this.splitc.replace("\\n","\n").replace("\\r","\r").replace("\\t","\t").replace("\\e","\e").replace("\\f","\f").replace("\\0","\0"); }
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var buf;
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if (this.out == "count") { buf = new Buffer(this.splitc); }
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else { buf = new Buffer(32768); } // set it to 32k... hopefully big enough for most.... but only hopefully
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this.connected = false;
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var node = this;
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var client;
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this.on("input", function(msg) {
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var i = 0;
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if ((!Buffer.isBuffer(msg.payload)) && (typeof msg.payload !== "string")) {
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msg.payload = msg.payload.toString();
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}
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if (!node.connected) {
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client = net.Socket();
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client.setTimeout(socketTimeout);
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node.status({});
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client.connect(node.port, node.server, function() {
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//node.log('client connected');
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node.status({fill:"green",shape:"dot",text:"connected"});
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node.connected = true;
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client.write(msg.payload);
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});
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client.on('data', function(data) {
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//node.log("data:"+ data.length+":"+ data);
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if (node.splitc === 0) {
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node.send({"payload": data});
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}
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else if (node.out === "sit") { // if we are staying connected just send the buffer
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node.send({"payload": data});
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}
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else {
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for (var j = 0; j < data.length; j++ ) {
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if (node.out === "time") {
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// do the timer thing
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if (node.tout) {
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i += 1;
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buf[i] = data[j];
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}
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else {
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node.tout = setTimeout(function () {
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node.tout = null;
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var m = new Buffer(i+1);
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buf.copy(m,0,0,i+1);
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node.send({"payload": m});
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client.end();
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m = null;
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}, node.splitc);
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i = 0;
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buf[0] = data[j];
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}
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}
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// count bytes into a buffer...
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else if (node.out == "count") {
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buf[i] = data[j];
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i += 1;
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if ( i >= node.serialConfig.count) {
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node.send({"payload": buf});
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client.end();
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i = 0;
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}
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}
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// look for a char
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else {
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buf[i] = data[j];
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i += 1;
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if (data[j] == node.splitc) {
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var m = new Buffer(i);
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buf.copy(m,0,0,i);
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node.send({"payload": m});
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client.end();
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m = null;
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i = 0;
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}
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}
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}
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}
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});
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client.on('end', function() {
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//node.log('client disconnected');
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node.connected = false;
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node.status({});
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client = null;
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});
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client.on('error', function() {
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node.log('connect failed');
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node.status({fill:"red",shape:"ring",text:"error"});
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if (client) { client.end(); }
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});
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client.on('timeout',function() {
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node.log('connect timeout');
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if (client) {
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client.end();
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setTimeout(function() {
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client.connect(node.port, node.server, function() {
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//node.log('client connected');
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node.connected = true;
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client.write(msg.payload);
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});
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},reconnectTime);
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}
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});
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}
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else { client.write(msg.payload); }
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});
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this.on("close", function() {
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if (client) { buf = null; client.end(); }
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});
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}
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RED.nodes.registerType("tcp request",TcpGet);
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}
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