如何设置仅适用于我的局域网的golang服务器监听器

Question

I am using iris platform to do programming in go language (I am very beginner). I want to make all my computers at home be available for accessing to go server which is one of the local machine as well. When I set the listener with my network IP (192.168.0.0) or with any specified IP (192.168.0.15) it gives me panic error back. Only available 0.0.0.0 or 127.0.0.1/localhost or 192.168.0.19 - that is same as localhost

import "net"

...

ln, err := net.Listen("tcp4", "192.168.12:9999")
    if err != nil{
        panic(err)
    }

    iris.Serve(ln)

...

The error is: panic: listen tcp4 192.168.0.12:9999: bind: The requested address is not valid in its context.

Thanks to all for help.

Answer 1

You should read up on how networking works but here are some points to get you started.

You listen on a port, not an IP address. So whatever machine you're using as your server, find your local IP address:

On Linux or Mac you can do it many ways:

ifconfig | grep netmask and get your local address eg. 192.168.x.xx

Then start up your server with your Go program and listen on a localhost port like 8080.

eg.

if err := http.ListenAndServe(":8080", nil); err != nil {
    //handle error
}

Then you can access the server with other machines in your house assuming they are on the same Wifi. Use a different computer and visit 192.168.x.xx:8080 from a browser.

To answer your question in your comments, outsiders cannot access your local server unless they have a connection to your Wifi.