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/** | |
* Copyright JS Foundation and other contributors, http://js.foundation | |
* | |
* 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 util = require("util"); | |
var vm = require("vm"); | |
function sendResults(node,_msgid,msgs) { | |
if (msgs == null) { | |
return; | |
} else if (!util.isArray(msgs)) { | |
msgs = [msgs]; | |
} | |
var msgCount = 0; | |
for (var m=0;m<msgs.length;m++) { | |
if (msgs[m]) { | |
if (util.isArray(msgs[m])) { | |
for (var n=0; n < msgs[m].length; n++) { | |
if (msgs[m][n] !== null && msgs[m][n] !== undefined) { | |
msgs[m][n]._msgid = _msgid; | |
msgCount++; | |
} | |
} | |
} else { | |
if (msgs[m] !== null && msgs[m] !== undefined) { | |
msgs[m]._msgid = _msgid; | |
msgCount++; | |
} | |
} | |
} | |
} | |
if (msgCount>0) { | |
node.send(msgs); | |
} | |
} | |
function FunctionNode(n) { | |
RED.nodes.createNode(this,n); | |
var node = this; | |
this.name = n.name; | |
this.func = n.func; | |
var functionText = "var results = null;"+ | |
"results = (function(msg){ "+ | |
"var __msgid__ = msg._msgid;"+ | |
"var node = {"+ | |
"log:__node__.log,"+ | |
"error:__node__.error,"+ | |
"warn:__node__.warn,"+ | |
"on:__node__.on,"+ | |
"status:__node__.status,"+ | |
"send:function(msgs){ __node__.send(__msgid__,msgs);}"+ | |
"};\n"+ | |
this.func+"\n"+ | |
"})(msg);"; | |
this.topic = n.topic; | |
this.outstandingTimers = []; | |
this.outstandingIntervals = []; | |
var sandbox = { | |
console:console, | |
util:util, | |
Buffer:Buffer, | |
RED:RED, | |
__node__: { | |
log: function() { | |
node.log.apply(node, arguments); | |
}, | |
error: function() { | |
node.error.apply(node, arguments); | |
}, | |
warn: function() { | |
node.warn.apply(node, arguments); | |
}, | |
send: function(id, msgs) { | |
sendResults(node, id, msgs); | |
}, | |
on: function() { | |
if (arguments[0] === "input") { | |
throw new Error(RED._("function.error.inputListener")); | |
} | |
node.on.apply(node, arguments); | |
}, | |
status: function() { | |
node.status.apply(node, arguments); | |
} | |
}, | |
context: { | |
set: function() { | |
node.context().set.apply(node,arguments); | |
}, | |
get: function() { | |
return node.context().get.apply(node,arguments); | |
}, | |
get global() { | |
return node.context().global; | |
}, | |
get flow() { | |
return node.context().flow; | |
} | |
}, | |
flow: { | |
set: function() { | |
node.context().flow.set.apply(node,arguments); | |
}, | |
get: function() { | |
return node.context().flow.get.apply(node,arguments); | |
} | |
}, | |
global: { | |
set: function() { | |
node.context().global.set.apply(node,arguments); | |
}, | |
get: function() { | |
return node.context().global.get.apply(node,arguments); | |
} | |
}, | |
setTimeout: function () { | |
var func = arguments[0]; | |
var timerId; | |
arguments[0] = function() { | |
sandbox.clearTimeout(timerId); | |
try { | |
func.apply(this,arguments); | |
} catch(err) { | |
node.error(err,{}); | |
} | |
}; | |
timerId = setTimeout.apply(this,arguments); | |
node.outstandingTimers.push(timerId); | |
return timerId; | |
}, | |
clearTimeout: function(id) { | |
clearTimeout(id); | |
var index = node.outstandingTimers.indexOf(id); | |
if (index > -1) { | |
node.outstandingTimers.splice(index,1); | |
} | |
}, | |
setInterval: function() { | |
var func = arguments[0]; | |
var timerId; | |
arguments[0] = function() { | |
try { | |
func.apply(this,arguments); | |
} catch(err) { | |
node.error(err,{}); | |
} | |
}; | |
timerId = setInterval.apply(this,arguments); | |
node.outstandingIntervals.push(timerId); | |
return timerId; | |
}, | |
clearInterval: function(id) { | |
clearInterval(id); | |
var index = node.outstandingIntervals.indexOf(id); | |
if (index > -1) { | |
node.outstandingIntervals.splice(index,1); | |
} | |
} | |
}; | |
var context = vm.createContext(sandbox); | |
try { | |
this.script = vm.createScript(functionText); | |
this.on("input", function(msg) { | |
try { | |
var start = process.hrtime(); | |
context.msg = msg; | |
this.script.runInContext(context); | |
sendResults(this,msg._msgid,context.results); | |
var duration = process.hrtime(start); | |
var converted = Math.floor((duration[0] * 1e9 + duration[1])/10000)/100; | |
this.metric("duration", msg, converted); | |
if (process.env.NODE_RED_FUNCTION_TIME) { | |
this.status({fill:"yellow",shape:"dot",text:""+converted}); | |
} | |
} catch(err) { | |
var line = 0; | |
var errorMessage; | |
var stack = err.stack.split(/\r?\n/); | |
if (stack.length > 0) { | |
while (line < stack.length && stack[line].indexOf("ReferenceError") !== 0) { | |
line++; | |
} | |
if (line < stack.length) { | |
errorMessage = stack[line]; | |
var m = /:(\d+):(\d+)$/.exec(stack[line+1]); | |
if (m) { | |
var lineno = Number(m[1])-1; | |
var cha = m[2]; | |
errorMessage += " (line "+lineno+", col "+cha+")"; | |
} | |
} | |
} | |
if (!errorMessage) { | |
errorMessage = err.toString(); | |
} | |
this.error(errorMessage, msg); | |
} | |
}); | |
this.on("close", function() { | |
while (node.outstandingTimers.length > 0) { | |
clearTimeout(node.outstandingTimers.pop()) | |
} | |
while (node.outstandingIntervals.length > 0) { | |
clearInterval(node.outstandingIntervals.pop()) | |
} | |
this.status({}); | |
}) | |
} catch(err) { | |
// eg SyntaxError - which v8 doesn't include line number information | |
// so we can't do better than this | |
this.error(err); | |
} | |
} | |
RED.nodes.registerType("function",FunctionNode); | |
RED.library.register("functions"); | |
} |
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