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Clone the first message passed to node.send in Function

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Also introduces an optional second arg to node.send in the Function
node that can disable that cloning
This commit is contained in:
Nick O'Leary 2019-09-12 22:08:52 +01:00
parent 89d0d6ec93
commit f0839571d0
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GPG Key ID: 4F2157149161A6C9
2 changed files with 59 additions and 5 deletions
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14
packages/node_modules/@node-red/nodes/core/function/10-function.js vendored
View File

@ -19,7 +19,7 @@ module.exports = function(RED) {
var util = require("util");
var vm = require("vm");
function sendResults(node,send,_msgid,msgs) {
function sendResults(node,send,_msgid,msgs,cloneFirstMessage) {
if (msgs == null) {
return;
} else if (!util.isArray(msgs)) {
@ -35,6 +35,10 @@ module.exports = function(RED) {
var msg = msgs[m][n];
if (msg !== null && msg !== undefined) {
if (typeof msg === 'object' && !Buffer.isBuffer(msg) && !util.isArray(msg)) {
if (msgCount === 0 && cloneFirstMessage !== false) {
msgs[m][n] = RED.util.cloneMessage(msgs[m][n]);
msg = msgs[m][n];
}
msg._msgid = _msgid;
msgCount++;
} else {
@ -80,7 +84,7 @@ module.exports = function(RED) {
"trace:__node__.trace,"+
"on:__node__.on,"+
"status:__node__.status,"+
"send:function(msgs){ __node__.send(__send__,__msgid__,msgs);},"+
"send:function(msgs,cloneMsg){ __node__.send(__send__,__msgid__,msgs,cloneMsg);},"+
"done:__done__"+
"};\n"+
this.func+"\n"+
@ -114,8 +118,8 @@ module.exports = function(RED) {
trace: function() {
node.trace.apply(node, arguments);
},
send: function(send, id, msgs) {
sendResults(node, send, id, msgs);
send: function(send, id, msgs, cloneMsg) {
sendResults(node, send, id, msgs, cloneMsg);
},
on: function() {
if (arguments[0] === "input") {
@ -241,7 +245,7 @@ module.exports = function(RED) {
context.done = done;
this.script.runInContext(context);
sendResults(this,send,msg._msgid,context.results);
sendResults(this,send,msg._msgid,context.results,false);
if (handleNodeDoneCall) {
done();
}

50
test/nodes/core/function/10-function_spec.js
View File

@ -93,6 +93,56 @@ describe('function node', function() {
});
});
function testSendCloning(args,done) {
var flow = [{id:"n1",type:"function",wires:[["n2"],["n2"]],func:"node.send("+args+"); msg.payload = 'changed';"},
{id:"n2", type:"helper"}];
helper.load(functionNode, flow, function() {
var n1 = helper.getNode("n1");
var n2 = helper.getNode("n2");
n2.on("input", function(msg) {
try {
msg.should.have.property('topic', 'bar');
msg.should.have.property('payload', 'foo');
done();
} catch(err) {
done(err);
}
});
var origMessage = {payload:"foo",topic: "bar"};
n1.receive(origMessage);
});
}
it('should clone single message sent using send()', function(done) {
testSendCloning("msg",done);
});
it('should not clone single message sent using send(,false)', function(done) {
var flow = [{id:"n1",type:"function",wires:[["n2"]],func:"node.send(msg,false); msg.payload = 'changed';"},
{id:"n2", type:"helper"}];
helper.load(functionNode, flow, function() {
var n1 = helper.getNode("n1");
var n2 = helper.getNode("n2");
n2.on("input", function(msg) {
msg.should.have.property('topic', 'bar');
msg.should.have.property('payload', 'changed');
done();
});
var origMessage = {payload:"foo",topic: "bar"};
n1.receive(origMessage);
});
});
it('should clone first message sent using send() - array 1', function(done) {
testSendCloning("[msg]",done);
});
it('should clone first message sent using send() - array 2', function(done) {
testSendCloning("[[msg],[null]]",done);
});
it('should clone first message sent using send() - array 3', function(done) {
testSendCloning("[null,msg]",done);
});
it('should clone first message sent using send() - array 3', function(done) {
testSendCloning("[null,[msg]]",done);
});
it('should pass through _topic', function(done) {
var flow = [{id:"n1",type:"function",wires:[["n2"]],func:"return msg;"},
{id:"n2", type:"helper"}];