Print something while read message from server with websocket

[洪嘉鴻]

Hello everyone:

      The version of the golang which I am using is 1.12.9 with Win10.

      I want to print something while the client is waiting for server.

      The following are the partial code of server and client.

      Server:

      time.Sleep(time.Second * 100)

      ws.Write([]byte("Hello!"))

      

      Client:

      while(!ws.Read(msg)){

      fmt.Println("Please wait because server is busy.")      

      }

      Can anyone suggest how to fix the code?

      Any help is appreciated.

      Thank you very much!

      Max

[Jake Montgomery]

You do not provide enough information to give a really good answer. There are a number of ways to achieve this, but they depend on the details. A more complete example would help.

What is the type of `ws`? If it is something on which you can set a read timeout, then one way would be to set a timeout, and loop.

[洪嘉鴻]

I'm sorry.

The followings are the complete codes of server and client:

Server

Client

Thank you very much!

      Max

Jake Montgomery於 2020年3月25日星期三 UTC+8下午9時28分37秒寫道：

[Jake Montgomery]

Your Client code does not compile. As a courtesy to those trying to help, it is always good to test your code before posting it. A working example, without your "busy" messages would be something like: https://play.golang.org/p/cvgwd8GDobc . The Read() method documentation says "Read implements the io.Reader interface." So I suggest you carefully read the io.Reader documentation, because it requires very specific handling to be done correctly.

Also, I did note that golang.org/x/net/websocket documentation states that: "This package currently lacks some features found in alternative and more actively maintained WebSocket packages." So you may want to consider using one of those.

I have not actually used golang.org/x/net/websocket myself, but there is a SetReadDeadline() function. Because I have not used the package before, there may be some hidden pitfalls that I am missing, but this code seems to do what you want, using SetReadDeadline(): https://play.golang.org/p/ISUR7c_Mtqb

Good luck

[洪嘉鴻]

I'm sorry that I didn't remind that my Client code does not compile.

I've tried your example with SetReadDeadline().

It seems like what I want to do.

Thank you very much!

      Max

Jake Montgomery於 2020年3月27日星期五 UTC+8上午1時12分07秒寫道：