mirror of https://github.com/node-red/node-red.git
121 lines
5.2 KiB
JavaScript
121 lines
5.2 KiB
JavaScript
/**
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* Copyright 2013,2015 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 spawn = require('child_process').spawn;
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var exec = require('child_process').exec;
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var isUtf8 = require('is-utf8');
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function ExecNode(n) {
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RED.nodes.createNode(this,n);
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this.cmd = (n.command || "").trim();
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if (n.addpay === undefined) { n.addpay = true; }
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this.addpay = n.addpay;
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this.append = (n.append || "").trim();
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this.useSpawn = n.useSpawn;
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this.activeProcesses = {};
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var node = this;
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this.on("input", function(msg) {
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node.status({fill:"blue",shape:"dot",text:" "});
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if (this.useSpawn === true) {
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// make the extra args into an array
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// then prepend with the msg.payload
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var arg = node.cmd;
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if (node.addpay) {
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arg += " "+msg.payload;
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}
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arg += " "+node.append;
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// slice whole line by spaces (trying to honour quotes);
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arg = arg.match(/(?:[^\s"]+|"[^"]*")+/g);
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var cmd = arg.shift();
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/* istanbul ignore else */
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if (RED.settings.verbose) { node.log(cmd+" ["+arg+"]"); }
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if (cmd.indexOf(" ") == -1) {
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var ex = spawn(cmd,arg);
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node.activeProcesses[ex.pid] = ex;
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ex.stdout.on('data', function (data) {
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//console.log('[exec] stdout: ' + data);
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if (isUtf8(data)) { msg.payload = data.toString(); }
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else { msg.payload = data; }
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node.send([msg,null,null]);
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});
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ex.stderr.on('data', function (data) {
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//console.log('[exec] stderr: ' + data);
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if (isUtf8(data)) { msg.payload = data.toString(); }
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else { msg.payload = new Buffer(data); }
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node.send([null,msg,null]);
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});
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ex.on('close', function (code) {
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//console.log('[exec] result: ' + code);
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delete node.activeProcesses[ex.pid];
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msg.payload = code;
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if (code === 0) { node.status({}); }
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else if (code < 0) { node.status({fill:"red",shape:"dot",text:"rc: "+code}); }
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else { node.status({fill:"yellow",shape:"dot",text:"rc: "+code}); }
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node.send([null,null,msg]);
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});
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ex.on('error', function (code) {
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delete node.activeProcesses[ex.pid];
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node.error(code,msg);
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});
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}
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else { node.error(RED._("exec.spawnerr")); }
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}
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else {
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var cl = node.cmd;
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if ((node.addpay === true) && ((msg.payload || "").toString().trim() !== "")) { cl += " "+msg.payload; }
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if (node.append.trim() !== "") { cl += " "+node.append; }
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/* istanbul ignore else */
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if (RED.settings.verbose) { node.log(cl); }
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var child = exec(cl, {encoding: 'binary', maxBuffer:10000000}, function (error, stdout, stderr) {
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msg.payload = new Buffer(stdout,"binary");
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try {
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if (isUtf8(msg.payload)) { msg.payload = msg.payload.toString(); }
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} catch(e) {
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node.log(RED._("exec.badstdout"));
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}
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var msg2 = {payload:stderr};
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var msg3 = null;
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//console.log('[exec] stdout: ' + stdout);
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//console.log('[exec] stderr: ' + stderr);
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if (error !== null) {
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msg3 = {payload:error};
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//console.log('[exec] error: ' + error);
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}
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node.status({});
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node.send([msg,msg2,msg3]);
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delete node.activeProcesses[child.pid];
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});
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child.on('error',function() {});
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node.activeProcesses[child.pid] = child;
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}
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});
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this.on('close',function() {
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for (var pid in node.activeProcesses) {
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/* istanbul ignore else */
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if (node.activeProcesses.hasOwnProperty(pid)) {
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node.activeProcesses[pid].kill();
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}
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}
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node.activeProcesses = {};
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});
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}
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RED.nodes.registerType("exec",ExecNode);
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}
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