clientjs | Device information and digital fingerprinting

You need to set the flag to enable SSL (as the picture of the ports suggests TLS is required for Websockets)

The Paho MQTT client can only connect to a broker configured to run MQTT over WebSockets.

The mosquitto.conf file you have provided has 3 listeners defined.

1. The default native MQTT listener on port 1883 bound only to localhost
2. A native MQTT over SSL listener on port 8883 using the letsencrypt certificate
3. A MQTT over WebSockets listener on port 8083 with the certificates commented out.

If you want to connect from the web page using MQTT over WebSockets and SSL you need to uncomment the certificates from the 3rd listener and change the port you are connecting to in the page to 8083 (not 8883)

From the Nodejs HTTP module documentation, you can call secureServer.close() to stop listening at the specified port. If the module exposes the server to Jest, you can use the teardown methods to stop the server automatically after tests complete.

This will help (from https://medium.com/creative-technology-concepts-code/detect-device-browser-and-version-using-javascript-8b511906745 ):

I will try to answer to your question. In your code you're not sending any data to your PHP. A solution would be to use Ajax.

You can't just execute a dll method in browser (this is done for security reasons). In order to execute some compiled code in browser you will have to use a plugin .

There are several workaround for this problem . After gone through some links, it seems it can be possible through following option.

• Firefox allows you to create XPI extension aka "addon"
• Chrome has extensions Calling a .dll function from a html page that runs on chrome and firefox

Create plug-in for those browser are written using the NPAPI. How to write a browser plugin?

Write signed applets to call dll that runs from a html or any web application. It almost run on all browsers. Here is the link for sample .

Escape the sandbox: Access native methods from an applet

Same task can be done using EdgeJS. You can find the answer at Call Function from DLL loaded in front-end javascript (load dll in clientside javascript) . The trick is to marshal functions between V8 and CLR and when the event triggers you send the message to javascript.

Call Function from DLL loaded in front-end javascript (load dll in clientside javascript)

Build a C# application (windows only if you use .NET, all platforms if you only use the CoreCLR) that listens to swipes and triggers an event to send the data on all connected websockets.

Need to call client side DLL from browser

You can have a client application written in say C# which connects to a JS websocket, then transfer the data. The WebSocket can check for specific chunks of data, and process it the way you want.

I have used it the way I have described in a project using a fingerprint scanner. Works great! If you add a little bit of Crypto, even better!

Call Function from DLL loaded in front-end javascript

1. Create an application that you can install on the users machine.
2. Run an embedded HTTP server in this application.
3. Ensure the embedded HTTP server returns CORS headers.
4. Write your logic in and end-point in the HTTP server API.
5. Use JS on the page to query the embedded HTTP server (if it runs).

ActiveX is just a method of implementing browser plugin in IE. All other browsers use different plugin interfaces. Then if user will install your plugin in browser - this plugin will be available from JS and you can use it to execute some function in dll.

Angular can't inject ClientJs because it doesn't know how.

In order to inject something, it must be in a providers array somewhere, and probably be @Injectable()

If you want to inject it, you can either write a class that wraps it, or simply instantiate it without injecting it

You are trying to connect to a native MQTT port with the Javascript client from a webpage. This WILL NOT WORK, you can only connect to websocket endpoints from within a webpage.

You need to make sure that Mosquitto is configured to listen for websocket connections (most likely on a different port to 1883) and then put the correct port number into your page.

This is by design, as noted in the documentation

Legal parameters and return values are JavaScript primitives like a Number, Boolean, String, or null, as well as JavaScript objects and arrays that are composed of primitives, objects and arrays. [...] Requests fail if you attempt to pass a Date, Function, DOM element besides a form, or other prohibited type, including prohibited types inside objects or arrays.

As a workaround, you can stringify an object with its methods: