Send a Staged Form-URL-Encoded REST Request

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Demonstrates Rest.SendReqFormUrlEncoded, which sends an application/x-www-form-urlencoded request whose body is built from the query parameters added to the object.

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
    }

    //  The form body is built from the query parameters added to the object.
    rest.AddQueryParam("username","alice")
    rest.AddQueryParam("action","login")

    //  Send the application/x-www-form-urlencoded request.
    success = rest.SendReqFormUrlEncoded("POST","/api/login")
    if success == false {
        fmt.Println(rest.LastErrorText())
        rest.DisposeRest()
        return
    }

    //  After sending, read the response status line and header fields.  The return value is the HTTP
    //  status code, or -1 if no response was received.
    statusCode := rest.ReadResponseHeader()
    if statusCode < 0 {
        fmt.Println(rest.LastErrorText())
        rest.DisposeRest()
        return
    }

    fmt.Println("Response status code: ", statusCode)

    //  Read the response body as text.
    responseBody := rest.ReadRespBodyString()
    if rest.LastMethodSuccess() == false {
        fmt.Println(rest.LastErrorText())
        rest.DisposeRest()
        return
    }

    fmt.Println(*responseBody)

    rest.DisposeRest()