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/**
* 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.
**/
module.exports = function(RED) {
"use strict";
var spawn = require('child_process').spawn;
var exec = require('child_process').exec;
function ExecNode(n) {
RED.nodes.createNode(this,n);
this.cmd = n.command.trim();
this.append = n.append.trim() || "";
this.useSpawn = n.useSpawn;
var node = this;
this.on("input", function(msg) {
node.status({fill:"blue",shape:"dot"});
if (this.useSpawn === true) {
// make the extra args into an array
// then prepend with the msg.payload
if (typeof(msg.payload !== "string")) { msg.payload = msg.payload.toString(); }
var arg = [];
if (node.append.length > 0) { arg = node.append.split(","); }
if (msg.payload.trim() !== "") { arg.unshift(msg.payload); }
node.log(node.cmd+" ["+arg+"]");
if (node.cmd.indexOf(" ") == -1) {
var ex = spawn(node.cmd,arg);
ex.stdout.on('data', function (data) {
//console.log('[exec] stdout: ' + data);
msg.payload = data.toString();
node.send([msg,null,null]);
});
ex.stderr.on('data', function (data) {
//console.log('[exec] stderr: ' + data);
msg.payload = data.toString();
node.send([null,msg,null]);
});
ex.on('close', function (code) {
//console.log('[exec] result: ' + code);
msg.payload = code;
node.status({});
node.send([null,null,msg]);
});
ex.on('error', function (code) {
node.warn(code);
});
}
else { node.error("Spawn command must be just the command - no spaces or extra parameters"); }
}
else {
var cl = node.cmd+" "+msg.payload+" "+node.append;
node.log(cl);
var child = exec(cl, function (error, stdout, stderr) {
msg.payload = stdout;
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]);
});
}
});
}
RED.nodes.registerType("exec",ExecNode);
}
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