Read the REST Response Body into a StringBuilder

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Demonstrates Rest.ReadRespSb, which reads the response body as text into a StringBuilder, replacing its previous contents.

Background. The staged request model separates sending from reading: a SendReq method transmits the request, ReadResponseHeader reads the status line and headers, and a ReadResp method reads the body. This gives fine control over large or streamed messages compared with the single-call full-request methods.

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    success := false

    rest := chilkat.NewRest()
    bTls := true
    bAutoReconnect := true
    success = rest.Connect("example.com",443,bTls,bAutoReconnect)
    if success == false {
        fmt.Println(rest.LastErrorText())
        rest.DisposeRest()
        return
    }

    success = rest.SendReqNoBody("GET","/api/items/123")
    if success == false {
        fmt.Println(rest.LastErrorText())
        rest.DisposeRest()
        return
    }

    statusCode := rest.ReadResponseHeader()
    if statusCode < 0 {
        fmt.Println(rest.LastErrorText())
        rest.DisposeRest()
        return
    }

    //  Read the response body as text into a StringBuilder, replacing its previous contents.
    sbResponse := chilkat.NewStringBuilder()
    success = rest.ReadRespSb(sbResponse)
    if success == false {
        fmt.Println(rest.LastErrorText())
        rest.DisposeRest()
        sbResponse.DisposeStringBuilder()
        return
    }

    responseBody := sbResponse.GetAsString()
    if sbResponse.LastMethodSuccess() == false {
        fmt.Println(sbResponse.LastErrorText())
        rest.DisposeRest()
        sbResponse.DisposeStringBuilder()
        return
    }

    fmt.Println(*responseBody)

    rest.DisposeRest()
    sbResponse.DisposeStringBuilder()