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/**
* Copyright 2013,2016 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 spawn = require('child_process').spawn;
var exec = require('child_process').exec;
var isUtf8 = require('is-utf8');
function ExecNode(n) {
RED.nodes.createNode(this,n);
this.cmd = (n.command || "").trim();
if (n.addpay === undefined) { n.addpay = true; }
this.addpay = n.addpay;
this.append = (n.append || "").trim();
this.useSpawn = n.useSpawn;
this.timer = Number(n.timer || 0)*1000;
this.activeProcesses = {};
var node = this;
var cleanup = function(p) {
node.activeProcesses[p].kill();
node.status({fill:"red",shape:"dot",text:"timeout"});
node.error("Exec node timeout");
}
this.on("input", function(msg) {
var child;
node.status({fill:"blue",shape:"dot",text:" "});
if (this.useSpawn === true) {
// make the extra args into an array
// then prepend with the msg.payload
var arg = node.cmd;
if ((node.addpay === true) && msg.hasOwnProperty("payload")) { arg += " "+msg.payload; }
if (node.append.trim() !== "") { arg += " "+node.append; }
// slice whole line by spaces (trying to honour quotes);
arg = arg.match(/(?:[^\s"]+|"[^"]*")+/g);
var cmd = arg.shift();
/* istanbul ignore else */
if (RED.settings.verbose) { node.log(cmd+" ["+arg+"]"); }
child = spawn(cmd,arg);
var unknownCommand = (child.pid === undefined);
if (node.timer !== 0) {
child.tout = setTimeout(function() { cleanup(child.pid); }, node.timer);
}
node.activeProcesses[child.pid] = child;
child.stdout.on('data', function (data) {
if (node.activeProcesses.hasOwnProperty(child.pid) && node.activeProcesses[child.pid] !== null) {
// console.log('[exec] stdout: ' + data,child.pid);
if (isUtf8(data)) { msg.payload = data.toString(); }
else { msg.payload = data; }
node.send([RED.util.cloneMessage(msg),null,null]);
}
});
child.stderr.on('data', function (data) {
if (node.activeProcesses.hasOwnProperty(child.pid) && node.activeProcesses[child.pid] !== null) {
if (isUtf8(data)) { msg.payload = data.toString(); }
else { msg.payload = new Buffer(data); }
node.send([null,RED.util.cloneMessage(msg),null]);
}
});
child.on('close', function (code) {
if (unknownCommand || (node.activeProcesses.hasOwnProperty(child.pid) && node.activeProcesses[child.pid] !== null)) {
delete node.activeProcesses[child.pid];
if (child.tout) { clearTimeout(child.tout); }
msg.payload = code;
if (code === 0) { node.status({}); }
if (code === null) { node.status({fill:"red",shape:"dot",text:"timeout"}); }
else if (code < 0) { node.status({fill:"red",shape:"dot",text:"rc: "+code}); }
else { node.status({fill:"yellow",shape:"dot",text:"rc: "+code}); }
node.send([null,null,RED.util.cloneMessage(msg)]);
}
});
child.on('error', function (code) {
if (child.tout) { clearTimeout(child.tout); }
delete node.activeProcesses[child.pid];
if (node.activeProcesses.hasOwnProperty(child.pid) && node.activeProcesses[child.pid] !== null) {
node.error(code,RED.util.cloneMessage(msg));
}
});
}
else {
var cl = node.cmd;
if ((node.addpay === true) && msg.hasOwnProperty("payload")) { cl += " "+msg.payload; }
if (node.append.trim() !== "") { cl += " "+node.append; }
/* istanbul ignore else */
if (RED.settings.verbose) { node.log(cl); }
child = exec(cl, {encoding: 'binary', maxBuffer:10000000}, function (error, stdout, stderr) {
msg.payload = new Buffer(stdout,"binary");
if (isUtf8(msg.payload)) { msg.payload = msg.payload.toString(); }
var msg2 = {payload:stderr};
var msg3 = null;
//console.log('[exec] stdout: ' + stdout);
//console.log('[exec] stderr: ' + stderr);
if (error !== null) {
msg3 = {payload:error};
//console.log('[exec] error: ' + error);
}
node.status({});
node.send([msg,msg2,msg3]);
if (child.tout) { clearTimeout(child.tout); }
delete node.activeProcesses[child.pid];
});
child.on('error',function() {});
if (node.timer !== 0) {
child.tout = setTimeout(function() { cleanup(child.pid); }, node.timer);
}
node.activeProcesses[child.pid] = child;
}
});
this.on('close',function() {
for (var pid in node.activeProcesses) {
/* istanbul ignore else */
if (node.activeProcesses.hasOwnProperty(pid)) {
if (node.activeProcesses[pid].tout) { clearTimeout(node.activeProcesses[pid].tout); }
// console.log("KILLLING",pid);
var process = node.activeProcesses[pid];
node.activeProcesses[pid] = null;
process.kill();
}
}
node.activeProcesses = {};
node.status({});
});
}
RED.nodes.registerType("exec",ExecNode);
}