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Send websocket data to specific client

I made a websocket server using nodeJS, and my problem is as follow : two clients will connect to the server. When the client 1 send a data to the server, I want to forward it to client 2.
In order to do this, I took inspiration from this kind of solution :https://github.com/websockets/ws/issues/367
Looks great, but when I apply it, it gaves me the following error :
TypeError [ERR_INVALID_ARG_TYPE]: The first argument must be of type string or an instance of Buffer, ArrayBuffer, or Array or an Array-like Object. Received an instance of Object
at new NodeError (node:internal/errors:371:5)
at Function.from (node:buffer:323:9)
at toBuffer (/home/ttt/node_modules/ws/lib/buffer-util.js:95:18)
at Sender.send (/home/ttt/node_modules/ws/lib/sender.js:315:14)
at WebSocket.send (/home/ttt/node_modules/ws/lib/websocket.js:467:18)
at WebSocket.<anonymous> (/home/ttt/STT_project/sttproject/IHM_server/websocketServer.js:43:15)
at WebSocket.emit (node:events:526:28)
at Receiver.receiverOnMessage (/home/ttt/node_modules/ws/lib/websocket.js:1137:20)
at Receiver.emit (node:events:526:28)
at Receiver.dataMessage (/home/ttt/node_modules/ws/lib/receiver.js:528:14)
code: 'ERR_INVALID_ARG_TYPE'
I tried different methods, but the result remains the same. Does anyone can help me with this ? Or propose a better solution to my problem.
There is a sample of my code:
wss.on("connection", ws => {
ws.id = id++;
lookup[ws.id] = ws;
ws.on("message", data => {
if(data.toString() != "\n")
{
message = {
"message":
{
"text": data.toString(),
"end": false
}
}
}
else {
message = {
"message":
{
"text": "",
"end": true
}
}
}
lookup[0].send('message');
})
...

Cloud function fails after changing Runtime to Node.js 10

I am trying to take firebase backup through a cloud function. The function was running completely fine when I was using Runtime: Node.js 8. However, since it is going to be deprecated soon, I now have to use Node.js 10. My fcloud function now fails with the below error:
Error: function execution failed. Details:
Cannot read property 'charCodeAt' of undefined
Detailed error log:
2020-05-27 11:01:21.820 IST
firestore_export
8kxlp9s867dy
TypeError: Cannot read property 'charCodeAt' of undefined at peg$parsetemplate (/workspace/node_modules/google-gax/build/src/pathTemplateParser.js:304:17) at Object.peg$parse [as parse] (/workspace/node_modules/google-gax/build/src/pathTemplateParser.js:633:18) at new PathTemplate (/workspace/node_modules/google-gax/build/src/pathTemplate.js:55:54) at segments.forEach.segment (/workspace/node_modules/google-gax/build/src/pathTemplate.js:120:29) at Array.forEach (<anonymous>) at PathTemplate.render (/workspace/node_modules/google-gax/build/src/pathTemplate.js:114:23) at FirestoreAdminClient.databasePath (/workspace/node_modules/#google-cloud/firestore/build/src/v1/firestore_admin_client.js:904:57) at exports.scheduledFirestoreBackup (/workspace/index.js:6:31) at Promise.resolve.then (/layers/google.nodejs.functions-framework/functions-framework/node_modules/#google-cloud/functions-framework/build/src/invoker.js:330:28) at process._tickCallback (internal/process/next_tick.js:68:7)
Expand all | Collapse all
{
insertId: "000000-f688386c-8f2b-4146-aaf7-1fe67c656fa2"
labels: {…}
logName: "projects/firestore-249705/logs/cloudfunctions.googleapis.com%2Fcloud-functions"
receiveTimestamp: "2020-05-27T05:31:31.171084310Z"
resource: {…}
severity: "ERROR"
textPayload: "TypeError: Cannot read property 'charCodeAt' of undefined
at peg$parsetemplate (/workspace/node_modules/google-gax/build/src/pathTemplateParser.js:304:17)
at Object.peg$parse [as parse] (/workspace/node_modules/google-gax/build/src/pathTemplateParser.js:633:18)
at new PathTemplate (/workspace/node_modules/google-gax/build/src/pathTemplate.js:55:54)
at segments.forEach.segment (/workspace/node_modules/google-gax/build/src/pathTemplate.js:120:29)
at Array.forEach (<anonymous>)
at PathTemplate.render (/workspace/node_modules/google-gax/build/src/pathTemplate.js:114:23)
at FirestoreAdminClient.databasePath (/workspace/node_modules/#google-cloud/firestore/build/src/v1/firestore_admin_client.js:904:57)
at exports.scheduledFirestoreBackup (/workspace/index.js:6:31)
at Promise.resolve.then (/layers/google.nodejs.functions-framework/functions-framework/node_modules/#google-cloud/functions-framework/build/src/invoker.js:330:28)
at process._tickCallback (internal/process/next_tick.js:68:7)"
timestamp: "2020-05-27T05:31:21.820Z"
trace: "projects/firestore-249705/traces/74e27700d135763bc4e7892ebb1a2333"
}
My index.js is as below:
const firestore = require('#google-cloud/firestore');
const client = new firestore.v1.FirestoreAdminClient();
// Replace BUCKET_NAME
const bucket = 'gs://gcp_firestore_ae2/firestore_export'
exports.scheduledFirestoreBackup = (event, context) => {
const databaseName = client.databasePath(
process.env.GCLOUD_PROJECT,
'(default)'
);
return client
.exportDocuments({
name: databaseName,
outputUriPrefix: bucket,
// Leave collectionIds empty to export all collections
// or define a list of collection IDs:
// collectionIds: ['users', 'posts']
collectionIds: ['most_valuable_items','nric_img','pay_slip','pic_of_ofc_entrance'],
})
.then(responses => {
const response = responses[0];
console.log(`Operation Name: ${response['name']}`);
return response;
})
.catch(err => {
console.error(err);
});
};

I had the same issue. I fixed it by changing:
process.env.GCLOUD_PROJECT
to my actual Project ID (e.g. "my_app_37274")

I had the same issue, It seems like in previous versions we don't need to GCLOUD_PROJECT in environment variable i.e it automatically detects it, but from node 10 onwards we need to pass this explicitly.
That's how I resolved it.
So instead of hardcoding it, try passing GCLOUD_PROJECT in cloud functions environment variables.
Note: GCLOUD_PROJECT is project id, not the project name.

Node Js and Ebay api

I am novice to NodeJs and working with ebay-api.
I found this great example at GitHub
one strange issue is when I run the js file via CMD. it is working but sometimes it shows error and then I cleared cache it works and sometimes after clearing the cache it shows error. But the code is exactly the same which I got output correctly. Did anyone face the same issue or any idea where might be the problem?
var ebay = require('../index.js');
var params = {
keywords: ["Canon", "Powershot"],
// add additional fields
outputSelector: ['AspectHistogram'],
paginationInput: {
entriesPerPage: 10
},
itemFilter: [
{name: 'FreeShippingOnly', value: true},
{name: 'MaxPrice', value: '150'}
],
domainFilter: [
{name: 'domainName', value: 'Digital_Cameras'}
]
};
ebay.xmlRequest({
serviceName: 'Finding',
opType: 'findItemsByKeywords',
appId: '<your app id>', // FILL IN YOUR OWN APP KEY
params: params,
parser: ebay.parseResponseJson // (default)
},
// gets all the items together in a merged array
function itemsCallback(error, itemsResponse) {
if (error) throw error;
var items = itemsResponse.searchResult.item;
console.log('Found', items.length, 'items');
for (var i = 0; i < items.length; i++) {
console.log('- ' + items[i].title);
console.log('- ' + items[i].galleryURL);
console.log('- ' + items[i].viewItemURL);
}
}
);
I'm getting the following errors:
C:\node_modules\ebay-api\examples> node H:\NodeJs\app.js //Run via NodeJS CMD
H:\NodeJs\app.js:36
if (error) throw error;
^
Error
at Request._callback (C:\Users\shiva raju\node_modules\ebay-api\lib\xml-request.js:151:23)
at Request.self.callback (C:\Users\shiva raju\node_modules\ebay-api\node_modules\request\request.js:200:22)
at emitTwo (events.js:106:13)
at Request.emit (events.js:194:7)
at Request. (C:\Users\shiva raju\node_modules\ebay-api\node_modules\request\request.js:1067:10)
at emitOne (events.js:101:20)
at Request.emit (events.js:191:7)
at IncomingMessage. (C:\Users\shiva raju\node_modules\ebay-api\node_modules\request\request.js:988:12)
at emitNone (events.js:91:20)
at IncomingMessage.emit (events.js:188:7)
Your suggestions would be appreciated. Thanks

You can use this node module ebay-node-api where you can get the response data in form of JSON.
You can check this example to check how to consume ebay-node-api
https://github.com/pajaydev/ebay-node-api/

You are throwing an error object in the callback but you are not catching it anywhere in the code. Please handle the error you are throwing.

SailsJs & Mocha : "policy.bind is not a function"

My bootstrap.test.js file is as follows.
var Sails = require('sails');
before(function (done) {
process.env.NODE_ENV = 'test';
process.env.PORT = 9999;
Sails.lift({
models: {
connection: 'localDiskDb',
migrate: 'drop'
}
}, function (err, server) {
sails = server;
if (err) return done(err);
sails.log.info('***** Starting tests... *****');
console.log('\n');
done(null, sails);
});
});
after(function (done) {
sails.lower(done);
});
A very simple modal test is available at tests/integration/controllers/AuthController.spec.js as follows.
var assert = require('assert');
describe('PackagesModel', function() {
describe('Sample Test1', function() {
it('Sample test', function (done) {
assert.equal(-1, [1,2,3].indexOf(4));
done();
});
});
});
I try to run the mocha tests as follows.
node ./node_modules/mocha/bin/mocha tests/bootstrap.test.js tests/integration/**/*.spec.js
This results in the following error.
1) "before all" hook
0 passing (1s)
1 failing
1) "before all" hook:
Uncaught TypeError: policy.bind is not a function
at Object.policyHookDef.normalizePolicy (node_modules/sails/lib/hooks/policies/index.js:206:38)
at normalize_each_policy (node_modules/sails/lib/hooks/policies/index.js:192:34)
at arrayMap (node_modules/#sailshq/lodash/lib/index.js:1556:25)
at Function.map (node_modules/#sailshq/lodash/lib/index.js:6886:14)
at Object.policyHookDef.normalizePolicy (node_modules/sails/lib/hooks/policies/index.js:191:13)
at node_modules/sails/lib/hooks/policies/index.js:172:59
at node_modules/#sailshq/lodash/lib/index.js:3228:15
at baseForOwn (node_modules/#sailshq/lodash/lib/index.js:2199:14)
at node_modules/#sailshq/lodash/lib/index.js:3198:18
at Function.<anonymous> (node_modules/#sailshq/lodash/lib/index.js:3501:13)
at node_modules/sails/lib/hooks/policies/index.js:167:11
at node_modules/#sailshq/lodash/lib/index.js:3228:15
at baseForOwn (node_modules/#sailshq/lodash/lib/index.js:2199:14)
at node_modules/#sailshq/lodash/lib/index.js:3198:18
at Function.<anonymous> (node_modules/#sailshq/lodash/lib/index.js:3501:13)
at Hook.policyHookDef.buildPolicyMap (node_modules/sails/lib/hooks/policies/index.js:150:9)
at Hook.wrapper [as buildPolicyMap] (node_modules/#sailshq/lodash/lib/index.js:3250:19)
at Hook.policyHookDef.bindPolicies (node_modules/sails/lib/hooks/policies/index.js:67:27)
at Sails.wrapper (node_modules/#sailshq/lodash/lib/index.js:3250:19)
at Sails.emitter.emit (node_modules/sails/lib/app/private/after.js:50:11)
at Router.flush (node_modules/sails/lib/router/index.js:360:9)
at Router.wrapper [as flush] (node_modules/#sailshq/lodash/lib/index.js:3250:19)
at Router.load (node_modules/sails/lib/router/index.js:136:8)
at Array.wrapper (node_modules/#sailshq/lodash/lib/index.js:3250:19)
at listener (node_modules/sails/node_modules/async/lib/async.js:600:42)
at node_modules/sails/node_modules/async/lib/async.js:542:17
at _arrayEach (node_modules/sails/node_modules/async/lib/async.js:85:13)
at Immediate.taskComplete (node_modules/sails/node_modules/async/lib/async.js:541:13)
Any ideas on what might lead to this?

For anyone who might come across the same error in the future, the reason for the error was the usage of sails-must middleware that I was using. In my policies.js file I had rules like the following.
MyController: {
createStatement : ['isAuthenticated',must().have(runner).priviledge],
getStatement :['isAuthenticated',must().have(driver).priviledge.or.have(clerk).priviledge]
},
When the above lines were removed, tests ran. I know that this is not a complete answer with the cause of the error. But should be useful to someone else who comes across the same problem.
I switched to the approach mentioned in this SO thread to make my ACL logic.
Hope this helps!

Sequelize TypeError: Cannot read property '1' of null

Normally this type of error would not be a problem but i simply cannot understand where this is happening:
Here is my setup:
router.route('/api/academyModule')
.post(function (req, res) {
req.body.academyModule.module_id = req.body.academyModule.module.id;
req.body.academyModule.module_module_type_id = req.body.academyModule.module.module_type.id;
var am = AcademyModule.build(req.body.academyModule);
am.add(req.body.academyModule.requirements, req.body.academyModule, function (success) {
res.json({id: this[null]});
},
function (err) {
res.status(err).send(err);
});
if(req.body.teams != null)
{
req.body.teams.forEach(function(y)
{
var atm = academy_team_has_academy_module.build({academy_team_id: y.id, academy_id: y.academy_id, academy_module_module_id: req.body.academyModule.module_id })
atm.add(function(success)
{
}, function(err)
{
res.status(err).send(err);
});
});
}
})
For this i have the following model:
academy_team_has_academy_module = sequelize.define('academy_team_has_academy_module', {
academy_team_id: {
type: DataTypes.INTEGER,
primaryKey: true,
autoIncrement: false
},
academy_id: DataTypes.INTEGER,
academy_module_module_id: DataTypes.INTEGER
}, {
freezeTableName: true,
instanceMethods: {
add: function (onSuccess, onError) {
academy_team_has_academy_module.build(this.dataValues)
.save().ok(onSuccess).error(onError);
}
}
});
i know for sure this happens in this model and not AcademyModule because when i remove this code it runs without any issues. So in my console i get the following print out:
Executing (default): INSERT INTO `requirements` (`id`,`value`,`requirement_type_id`) VALUES (DEFAULT,5,'2');
Executing (default): INSERT INTO `academy_team_has_academy_module` (`academy_team_id`,`academy_id`,`academy_module_module_id`) VALUES (1,3,11);
Executing (default): INSERT INTO `academy_module` (`academy_id`,`module_id`,`module_module_type_id`,`sort_number`,`requirements_id`) VALUES ('3',11,4,4,40);
And just right after i get:
/var/www/learningbankapi/src/node_modules/mysql/lib/protocol/Parser.js:82
throw err;
^
TypeError: Cannot read property '1' of null
at module.exports.Query.formatError (/var/www/learningbankapi/src/node_modules/sequelize/lib/dialects/mysql/query.js:155:23)
at Query.module.exports.Query.run [as _callback] (/var/www/learningbankapi/src/node_modules/sequelize/lib/dialects/mysql/query.js:38:23)
at Query.Sequence.end (/var/www/learningbankapi/src/node_modules/mysql/lib/protocol/sequences/Sequence.js:96:24)
at Query.ErrorPacket (/var/www/learningbankapi/src/node_modules/mysql/lib/protocol/sequences/Query.js:93:8)
at Protocol._parsePacket (/var/www/learningbankapi/src/node_modules/mysql/lib/protocol/Protocol.js:271:23)
at Parser.write (/var/www/learningbankapi/src/node_modules/mysql/lib/protocol/Parser.js:77:12)
at Protocol.write (/var/www/learningbankapi/src/node_modules/mysql/lib/protocol/Protocol.js:39:16)
at Socket.Connection.connect (/var/www/learningbankapi/src/node_modules/mysql/lib/Connection.js:82:28)
at Socket.EventEmitter.emit (events.js:95:17)
at Socket.stream.pause.paused (_stream_readable.js:746:14)
at Socket.EventEmitter.emit (events.js:92:17)
at emitReadable_ (_stream_readable.js:408:10)
at emitReadable (_stream_readable.js:404:5)
at readableAddChunk (_stream_readable.js:165:9)
at Socket.Readable.push (_stream_readable.js:127:10)
at TCP.onread (net.js:526:21)
Ive debugged the whole thing and i can't seem to find any undefined variables. What might have gone wrong here?

Your problem is a ForeignKeyContraintError. Sequelize is trying to throw a new error but get's an unexpected error.message. If your configuration is fine, this may be an bug of sequelize.
Maybe deactivating foreign contraint checks (if possible) will solve your problem.
See: https://github.com/sequelize/sequelize/blob/master/lib/dialects/mysql/query.js#L153