(Go) HTTP POST and Stream Response to File

Demonstrates how to send an HTTP POST and stream the response body directly to a file.

Chilkat Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    rest := chilkat.NewRest()

    url := chilkat.NewUrl()
    // This URL will emit a response that echos the query params (name and age)
    url.ParseUrl("https://www.chilkatsoft.com/readPost.asp")

    // Connect to the web server
    bAutoReconnect := true
    success := rest.Connect(url.Host(),url.Port(),url.Ssl(),bAutoReconnect)
    if success != true {
        fmt.Println(rest.LastErrorText())
        rest.DisposeRest()
        url.DisposeUrl()
        return
    }

    rest.AddQueryParam("name","John")
    rest.AddQueryParam("age","33")

    //  Send the HTTP POST.
    success = rest.SendReqFormUrlEncoded("POST",url.Path())
    if success != true {
        fmt.Println(rest.LastErrorText())
        rest.DisposeRest()
        url.DisposeUrl()
        return
    }

    // Read the response header.
    responseStatusCode := rest.ReadResponseHeader()
    if responseStatusCode < 0 {
        fmt.Println(rest.LastErrorText())
        rest.DisposeRest()
        url.DisposeUrl()
        return
    }

    fmt.Println("Response status code = ", responseStatusCode)

    // We expect a 200 response status if the file data is coming.
    // Otherwise, we'll get a string response body with an error message(or no response body).
    if responseStatusCode == 200 {

        bodyStream := chilkat.NewStream()

        // The stream's sink will be a file.
        bodyStream.SetSinkFile("qa_output/out.txt")

        // Read the response body to the stream.  Given that we've
        // set the stream's sink to a file, it will stream directly
        // to the file.
        success = rest.ReadRespBodyStream(bodyStream,true)
        if success != true {
            fmt.Println(rest.LastErrorText())
            rest.DisposeRest()
            url.DisposeUrl()
            bodyStream.DisposeStream()
            return
        }

        fmt.Println("Successfully streamed the response to a file.")

    }
    else {
        errResponse := rest.ReadRespBodyString()
        if rest.LastMethodSuccess() != true {
            fmt.Println(rest.LastErrorText())
        }
        else {
            fmt.Println(*errResponse)
        }

    }


    rest.DisposeRest()
    url.DisposeUrl()
    bodyStream.DisposeStream()