使用本地端口从网站发送TCP / IP请求

Question

I want to create a web utility which will use a local port for sending a TCP/IP request.

Does it possible to use a client side port to send a TCP/IP request?

I know it is possible if we send a TCP/IP request from a web server and the specific port is allowed on server. But I want to send the request using the client side port.

What would I need to do? Should I create a Java Applet/Plugin or is it possible using PHP/.net?

Answer 1

It depends what you want to do, but fundamentally you can't initiate operations on the client using server side code like PHP.

Javascript is capable of some networking operations using XHR (Ajax) and WebSockets , and wrapping libraries such as socket.io . Perhaps that will suffice for your needs.

A Java Applet will be more capable, but will be restricted in what it can do unless you sign the code. And of course will be slower to start up for the client.