Golang中的参数处理

Question

I will be giving the following as the command to run my go program.

go run app.go 3001-3005

What this is supposed to do is, run my go Rest api on server ports 3001 to 3005.

This part of my main function which handles this argument.

func main() { 
ipfile := os.Args[1:]
s := strings.Split(ipfile, "-")
mux := routes.New() 
mux.Put("/:key1/:value1", PutData)
mux.Get("/profile/:key1", GetSingleData) 
mux.Get("/profile", GetData)
http.Handle("/", mix)

Here I will run a for loop and replace the first argument with s[i].

http.ListenAndServe(":3000", nil)
}

I get the following output:

cannot use ipfile (type []string) as type string in argument to strings.Split

What datatype does os.args return? I tried converting it to string and then splitting. Does not work. Please let me know what is wrong?

Answer 1

Like the error says, ipfile is a []string. The [1:] slice operation is going to return a slice, even if there's only 1 element.

After checking that os.Args has the enough elements, use:

ipfile := os.Args[1]
s := strings.Split(ipfile, "-")