iot-sol
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Intel(r) IoT Services Orchestration Layer - HTML5 IDE + Node.js middleware to create and host distributed IoT Apps in minutes
564 lines (529 loc) • 25.8 kB
JavaScript
/******************************************************************************
Copyright (c) 2016, Intel Corporation
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of Intel Corporation nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*****************************************************************************/
/**
* Copyright 2013,2015 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 reconnectTime = RED.settings.socketReconnectTime||10000;
var socketTimeout = RED.settings.socketTimeout||null;
var net = require('net');
var connectionPool = {};
function TcpIn(n) {
RED.nodes.createNode(this,n);
this.host = n.host;
this.port = n.port * 1;
this.topic = n.topic;
this.stream = (!n.datamode||n.datamode=='stream'); /* stream,single*/
this.datatype = n.datatype||'buffer'; /* buffer,utf8,base64 */
this.newline = (n.newline||"").replace("\\n","\n").replace("\\r","\r");
this.base64 = n.base64;
this.server = (typeof n.server == 'boolean')?n.server:(n.server == "server");
this.closing = false;
this.connected = false;
var node = this;
var count = 0;
if (!node.server) {
var buffer = null;
var client;
var reconnectTimeout;
var end = false;
var setupTcpClient = function() {
node.log(RED._("tcpin.status.connecting",{host:node.host,port:node.port}));
node.status({fill:"grey",shape:"dot",text:"common.status.connecting"});
var id = (1+Math.random()*4294967295).toString(16);
client = net.connect(node.port, node.host, function() {
buffer = (node.datatype == 'buffer')? new Buffer(0):"";
node.connected = true;
node.log(RED._("tcpin.status.connected",{host:node.host,port:node.port}));
node.status({fill:"green",shape:"dot",text:"common.status.connected"});
});
connectionPool[id] = client;
client.on('data', function (data) {
if (node.datatype != 'buffer') {
data = data.toString(node.datatype);
}
if (node.stream) {
var msg;
if ((node.datatype) === "utf8" && node.newline !== "") {
buffer = buffer+data;
var parts = buffer.split(node.newline);
for (var i = 0;i<parts.length-1;i+=1) {
msg = {topic:node.topic, payload:parts[i]};
msg._session = {type:"tcp",id:id};
node.send(msg);
}
buffer = parts[parts.length-1];
} else {
msg = {topic:node.topic, payload:data};
msg._session = {type:"tcp",id:id};
node.send(msg);
}
} else {
if ((typeof data) === "string") {
buffer = buffer+data;
} else {
buffer = Buffer.concat([buffer,data],buffer.length+data.length);
}
}
});
client.on('end', function() {
if (!node.stream || (node.datatype == "utf8" && node.newline != "" && buffer.length > 0)) {
var msg = {topic:node.topic, payload:buffer};
msg._session = {type:"tcp",id:id};
if (buffer.length !== 0) {
end = true; // only ask for fast re-connect if we actually got something
node.send(msg);
}
buffer = null;
}
});
client.on('close', function() {
delete connectionPool[id];
node.connected = false;
node.status({fill:"red",shape:"ring",text:"common.status.disconnected"});
if (!node.closing) {
if (end) { // if we were asked to close then try to reconnect once very quick.
end = false;
reconnectTimeout = setTimeout(setupTcpClient, 20);
}
else {
node.log(RED._("tcpin.errors.connection-lost",{host:node.host,port:node.port}));
reconnectTimeout = setTimeout(setupTcpClient, reconnectTime);
}
} else {
if (node.done) { node.done(); }
}
});
client.on('error', function(err) {
node.log(err);
});
}
setupTcpClient();
this.on('close', function(done) {
node.done = done;
this.closing = true;
if (client) { client.destroy(); }
clearTimeout(reconnectTimeout);
if (!node.connected) { done(); }
});
} else {
var server = net.createServer(function (socket) {
socket.setKeepAlive(true,120000);
if (socketTimeout !== null) { socket.setTimeout(socketTimeout); }
var id = (1+Math.random()*4294967295).toString(16);
connectionPool[id] = socket;
count++;
node.status({text:RED._("tcpin.status.connections",{count:count})});
var buffer = (node.datatype == 'buffer')? new Buffer(0):"";
socket.on('data', function (data) {
if (node.datatype != 'buffer') {
data = data.toString(node.datatype);
}
if (node.stream) {
var msg;
if ((typeof data) === "string" && node.newline !== "") {
buffer = buffer+data;
var parts = buffer.split(node.newline);
for (var i = 0; i<parts.length-1; i+=1) {
msg = {topic:node.topic, payload:parts[i],ip:socket.remoteAddress,port:socket.remotePort};
msg._session = {type:"tcp",id:id};
node.send(msg);
}
buffer = parts[parts.length-1];
} else {
msg = {topic:node.topic, payload:data};
msg._session = {type:"tcp",id:id};
node.send(msg);
}
} else {
if ((typeof data) === "string") {
buffer = buffer+data;
} else {
buffer = Buffer.concat([buffer,data],buffer.length+data.length);
}
}
});
socket.on('end', function() {
if (!node.stream || (node.datatype === "utf8" && node.newline !== "")) {
if (buffer.length > 0) {
var msg = {topic:node.topic, payload:buffer};
msg._session = {type:"tcp",id:id};
node.send(msg);
}
buffer = null;
}
});
socket.on('timeout', function() {
node.log(RED._("tcpin.errors.timeout",{port:node.port}));
socket.end();
});
socket.on('close', function() {
delete connectionPool[id];
count--;
node.status({text:RED._("tcpin.status.connections",{count:count})});
});
socket.on('error',function(err) {
node.log(err);
});
});
server.on('error', function(err) {
if (err) {
node.error(RED._("tcpin.errors.cannot-listen",{port:node.port,error:err.toString()}));
}
});
server.listen(node.port, function(err) {
if (err) {
node.error(RED._("tcpin.errors.cannot-listen",{port:node.port,error:err.toString()}));
} else {
node.log(RED._("tcpin.status.listening-port",{port:node.port}));
node.on('close', function() {
for (var c in connectionPool) {
if (connectionPool.hasOwnProperty(c)) {
connectionPool[c].end();
connectionPool[c].unref();
}
}
node.closing = true;
server.close();
node.log(RED._("tcpin.status.stopped-listening",{port:node.port}));
});
}
});
}
}
RED.nodes.registerType("tcp in",TcpIn);
function TcpOut(n) {
RED.nodes.createNode(this,n);
this.host = n.host;
this.port = n.port * 1;
this.base64 = n.base64;
this.doend = n.end || false;
this.beserver = n.beserver;
this.name = n.name;
this.closing = false;
this.connected = false;
var node = this;
if (!node.beserver||node.beserver=="client") {
var reconnectTimeout;
var client = null;
var end = false;
var setupTcpClient = function() {
node.log(RED._("tcpin.status.connecting",{host:node.host,port:node.port}));
node.status({fill:"grey",shape:"dot",text:"common.status.connecting"});
client = net.connect(node.port, node.host, function() {
node.connected = true;
node.log(RED._("tcpin.status.connected",{host:node.host,port:node.port}));
node.status({fill:"green",shape:"dot",text:"common.status.connected"});
});
client.on('error', function (err) {
node.log(RED._("tcpin.errors.error",{error:err.toString()}));
});
client.on('end', function (err) {
node.status({});
node.connected = false;
});
client.on('close', function() {
node.status({fill:"red",shape:"ring",text:"common.status.disconnected"});
node.connected = false;
client.destroy();
if (!node.closing) {
if (end) {
end = false;
reconnectTimeout = setTimeout(setupTcpClient,20);
}
else {
node.log(RED._("tcpin.errors.connection-lost",{host:node.host,port:node.port}));
reconnectTimeout = setTimeout(setupTcpClient,reconnectTime);
}
} else {
if (node.done) { node.done(); }
}
});
}
setupTcpClient();
node.on("input", function(msg) {
if (node.connected && msg.payload != null) {
if (Buffer.isBuffer(msg.payload)) {
client.write(msg.payload);
} else if (typeof msg.payload === "string" && node.base64) {
client.write(new Buffer(msg.payload,'base64'));
} else {
client.write(new Buffer(""+msg.payload));
}
if (node.doend === true) {
end = true;
if (client) { node.status({}); client.destroy(); }
}
}
});
node.on("close", function(done) {
node.done = done;
this.closing = true;
if (client) { client.destroy(); }
clearTimeout(reconnectTimeout);
if (!node.connected) { done(); }
});
} else if (node.beserver == "reply") {
node.on("input",function(msg) {
if (msg._session && msg._session.type == "tcp") {
var client = connectionPool[msg._session.id];
if (client) {
if (Buffer.isBuffer(msg.payload)) {
client.write(msg.payload);
} else if (typeof msg.payload === "string" && node.base64) {
client.write(new Buffer(msg.payload,'base64'));
} else {
client.write(new Buffer(""+msg.payload));
}
}
}
else {
for (var i in connectionPool) {
if (Buffer.isBuffer(msg.payload)) {
connectionPool[i].write(msg.payload);
} else if (typeof msg.payload === "string" && node.base64) {
connectionPool[i].write(new Buffer(msg.payload,'base64'));
} else {
connectionPool[i].write(new Buffer(""+msg.payload));
}
}
}
});
} else {
var connectedSockets = [];
node.status({text:RED._("tcpin.status.connections",{count:0})});
var server = net.createServer(function (socket) {
socket.setKeepAlive(true,120000);
if (socketTimeout !== null) { socket.setTimeout(socketTimeout); }
var remoteDetails = socket.remoteAddress+":"+socket.remotePort;
node.log(RED._("tcpin.status.connection-from",{host:socket.remoteAddress, port:socket.remotePort}));
connectedSockets.push(socket);
node.status({text:RED._("tcpin.status.connections",{count:connectedSockets.length})});
socket.on('timeout', function() {
node.log(RED._("tcpin.errors.timeout",{port:node.port}));
socket.end();
});
socket.on('close',function() {
node.log(RED._("tcpin.status.connection-closed",{host:socket.remoteAddress, port:socket.remotePort}));
connectedSockets.splice(connectedSockets.indexOf(socket),1);
node.status({text:RED._("tcpin.status.connections",{count:connectedSockets.length})});
});
socket.on('error',function() {
node.log(RED._("tcpin.errors.socket-error",{host:socket.remoteAddress, port:socket.remotePort}));
connectedSockets.splice(connectedSockets.indexOf(socket),1);
node.status({text:RED._("tcpin.status.connections",{count:connectedSockets.length})});
});
});
node.on("input", function(msg) {
if (msg.payload != null) {
var buffer;
if (Buffer.isBuffer(msg.payload)) {
buffer = msg.payload;
} else if (typeof msg.payload === "string" && node.base64) {
buffer = new Buffer(msg.payload,'base64');
} else {
buffer = new Buffer(""+msg.payload);
}
for (var i = 0; i < connectedSockets.length; i += 1) {
if (node.doend === true) { connectedSockets[i].end(buffer); }
else { connectedSockets[i].write(buffer); }
}
}
});
server.on('error', function(err) {
if (err) {
node.error(RED._("tcpin.errors.cannot-listen",{port:node.port,error:err.toString()}));
}
});
server.listen(node.port, function(err) {
if (err) {
node.error(RED._("tcpin.errors.cannot-listen",{port:node.port,error:err.toString()}));
} else {
node.log(RED._("tcpin.status.listening-port",{port:node.port}));
node.on('close', function() {
for (var c in connectedSockets) {
if (connectedSockets.hasOwnProperty(c)) {
connectedSockets[c].end();
connectedSockets[c].unref();
}
}
server.close();
node.log(RED._("tcpin.status.stopped-listening",{port:node.port}));
});
}
});
}
}
RED.nodes.registerType("tcp out",TcpOut);
function TcpGet(n) {
RED.nodes.createNode(this,n);
this.server = n.server;
this.port = Number(n.port);
this.out = n.out;
this.splitc = n.splitc;
if (this.out != "char") { this.splitc = Number(this.splitc); }
else { this.splitc = this.splitc.replace("\\n",0x0A).replace("\\r",0x0D).replace("\\t",0x09).replace("\\e",0x1B).replace("\\f",0x0C).replace("\\0",0x00); } // jshint ignore:line
var buf;
if (this.out == "count") {
if (this.splitc === 0) { buf = new Buffer(1); }
else { buf = new Buffer(this.splitc); }
}
else { buf = new Buffer(65536); } // set it to 64k... hopefully big enough for most TCP packets.... but only hopefully
this.connected = false;
var node = this;
var client;
this.on("input", function(msg) {
var i = 0;
if ((!Buffer.isBuffer(msg.payload)) && (typeof msg.payload !== "string")) {
msg.payload = msg.payload.toString();
}
if (!node.connected) {
client = net.Socket();
if (socketTimeout !== null) { client.setTimeout(socketTimeout); }
var host = node.server || msg.host;
var port = node.port || msg.port;
if (host && port) {
client.connect(port, host, function() {
//node.log(RED._("tcpin.errors.client-connected"));
node.status({fill:"green",shape:"dot",text:"common.status.connected"});
node.connected = true;
client.write(msg.payload);
});
}
else {
node.warn(RED._("tcpin.errors.no-host"));
}
client.on('data', function(data) {
if (node.out == "sit") { // if we are staying connected just send the buffer
msg.payload = data;
node.send(msg);
}
else if (node.splitc === 0) {
msg.payload = data;
node.send(msg);
}
else {
for (var j = 0; j < data.length; j++ ) {
if (node.out === "time") {
// do the timer thing
if (node.tout) {
i += 1;
buf[i] = data[j];
}
else {
node.tout = setTimeout(function () {
node.tout = null;
msg.payload = new Buffer(i+1);
buf.copy(msg.payload,0,0,i+1);
node.send(msg);
if (client) { node.status({}); client.destroy(); }
}, node.splitc);
i = 0;
buf[0] = data[j];
}
}
// count bytes into a buffer...
else if (node.out == "count") {
buf[i] = data[j];
i += 1;
if ( i >= node.splitc) {
msg.payload = new Buffer(i);
buf.copy(msg.payload,0,0,i);
node.send(msg);
if (client) { node.status({}); client.destroy(); }
i = 0;
}
}
// look for a char
else {
buf[i] = data[j];
i += 1;
if (data[j] == node.splitc) {
msg.payload = new Buffer(i);
buf.copy(msg.payload,0,0,i);
node.send(msg);
if (client) { node.status({}); client.destroy(); }
i = 0;
}
}
}
}
});
client.on('end', function() {
//console.log("END");
node.connected = false;
node.status({fill:"grey",shape:"ring",text:"common.status.disconnected"});
client = null;
});
client.on('close', function() {
//console.log("CLOSE");
node.connected = false;
if (node.done) { node.done(); }
});
client.on('error', function() {
//console.log("ERROR");
node.connected = false;
node.status({fill:"red",shape:"ring",text:"common.status.error"});
node.error(RED._("tcpin.errors.connect-fail"),msg);
if (client) { client.destroy(); }
});
client.on('timeout',function() {
//console.log("TIMEOUT");
node.connected = false;
node.status({fill:"grey",shape:"dot",text:"tcpin.errors.connect-timeout"});
//node.warn(RED._("tcpin.errors.connect-timeout"));
if (client) {
client.connect(port, host, function() {
node.connected = true;
node.status({fill:"green",shape:"dot",text:"common.status.connected"});
});
}
});
}
else { client.write(msg.payload); }
});
this.on("close", function(done) {
node.done = done;
if (client) {
client.destroy();
}
node.status({});
if (!node.connected) { done(); }
});
}
RED.nodes.registerType("tcp request",TcpGet);
}