mirror of https://github.com/node-red/node-red.git
72 lines
2.5 KiB
JavaScript
72 lines
2.5 KiB
JavaScript
/**
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* Copyright 2013 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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var RED = require("../../red/red");
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var util = require("util");
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var vm = require("vm");
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var fs = require('fs');
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var fspath = require('path');
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function FunctionNode(n) {
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RED.nodes.createNode(this,n);
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this.name = n.name;
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this.func = n.func;
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var functionText = "var results = (function(msg){"+this.func+"})(msg);";
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this.topic = n.topic;
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this.context = {global:RED.settings.functionGlobalContext || {}};
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try {
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this.script = vm.createScript(functionText);
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this.on("input", function(msg) {
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if (msg != null) {
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var sandbox = {msg:msg,console:console,util:util,Buffer:Buffer,context:this.context};
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try {
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this.script.runInNewContext(sandbox);
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var results = sandbox.results;
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if (results == null) {
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results = [];
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} else if (results.length == null) {
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results = [results];
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}
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if (msg._topic) {
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for (var m in results) {
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if (results[m]) {
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if (util.isArray(results[m])) {
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for (var n in results[m]) {
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results[m][n]._topic = msg._topic;
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}
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} else {
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results[m]._topic = msg._topic;
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}
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}
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}
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}
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this.send(results);
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} catch(err) {
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this.error(err.message);
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}
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}
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});
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} catch(err) {
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this.error(err.message);
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}
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}
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RED.nodes.registerType("function",FunctionNode);
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RED.library.register("functions");
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