How to remove Cursor Position ANSI escape code from `HijackedResponse` in Go? - go

Question

I am trying to exec (interact with) a docker container, with Go.
This is the code I am using:
func (docker *Docker) redirectResponseToOutputStream(outputStream, errorStream io.Writer, resp io.Reader) error {
_, err := stdcopy.StdCopy(outputStream, errorStream, resp)
return err
}
func (docker *Docker) holdHijackedConnection(inputStream io.Reader, outputStream, errorStream io.Writer, resp types.HijackedResponse) error {
receiveStdout := make(chan error)
if outputStream != nil || errorStream != nil {
go func() {
receiveStdout <- docker.redirectResponseToOutputStream(outputStream, errorStream, resp.Reader)
}()
}
stdinDone := make(chan struct{})
go func() {
if inputStream != nil {
io.Copy(resp.Conn, inputStream)
}
resp.CloseWrite()
close(stdinDone)
}()
select {
case err := <-receiveStdout:
return err
case <-stdinDone:
if outputStream != nil || errorStream != nil {
return <-receiveStdout
}
}
return nil
}
...and call the the holdHijackedConnection here:
func (docker *Docker) ContainerExec(ctx context.Context, container *injection.Container) error {
createResponse, err := docker.client.ContainerExecCreate(ctx, container.ID, types.ExecConfig{
AttachStdout: true,
AttachStderr: true,
AttachStdin: true,
Detach: true,
Tty: true,
Cmd: []string{"sh"},
})
if err != nil {
return err
}
stream, err := docker.client.ContainerExecAttach(ctx, createResponse.ID, types.ExecStartCheck{})
if err != nil {
return err
}
defer stream.Close()
docker.holdHijackedConnection(os.Stdin, os.Stdout, os.Stderr, stream)
return nil
}
Some notes:
sh is necessary, it's an alpine image
injection.Container just holds information about the container, it's a custom struct
Docker is a struct, that holds the docker client (an instance from Client at github.com/docker/docker/client)
What I get as a result to the cli, if I execute my application, is something like this:
/usr/app $ ^[[43;12R
I far as I know, the ^[[43;12R is the ANSI escape code for the position of the cursor.
I can execute commands, like ls or npm i whatever, but I alwasy get back these ANSI escape codes.
My question is, is there some way to remove these from the stdout?