(Go) QR Code Generator via api.qrserver.com REST API

See more HTTP Examples

Demonstrates how to generate a QR code using the api.qrserver.com REST API service.

For more information, see https://goqr.me/api/doc/create-qr-code/

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.

    http := chilkat.NewHttp()
    var success bool

    // Send the following GET request to get a binary response.
    // The body of the binary response contains the image data for the QR code.
    // https://api.qrserver.com/v1/create-qr-code/?data=[URL-encoded-text]&size=[pixels]x[pixels]

    queryParams := chilkat.NewJsonObject()
    queryParams.UpdateString("data","Hello World")
    queryParams.UpdateString("size","100x100")

    // Get a PNG file..
    // Possible formats are:
    // png
    // gif
    // jpeg
    // jpg
    // svg
    // eps
    // Case matters.  Use lowercase.
    queryParams.UpdateString("format","png")

    // Send the GET request to an endpoint.
    // Chilkat will add the url-encoded query params passed in the JSON.
    resp := http.QuickRequestParams("GET","https://api.qrserver.com/v1/create-qr-code/",queryParams)
    if http.LastMethodSuccess() == false {
        fmt.Println(http.LastErrorText())
        http.DisposeHttp()
        queryParams.DisposeJsonObject()
        return
    }

    // Did it succeed?
    if resp.StatusCode() != 200 {
        // The response body, if anything, would not be the image data, but would likely be the error text (or HTML, or whatever...)
        fmt.Println(resp.BodyStr())
        fmt.Println("Response status = ", resp.StatusCode())
        fmt.Println("Failed.")
        resp.DisposeHttpResponse()
        http.DisposeHttp()
        queryParams.DisposeJsonObject()
        return
    }

    // Success if we get here..
    // Save the binary body as the PNG file, or you can get the bytes of the PNG..
    success = resp.SaveBodyBinary("c:/temp/qa_output/qr_code.png")

    // Or get the bytes:
    bd := chilkat.NewBinData()
    resp.GetBodyBd(bd)
    // Use the bytes in bd...
    // See the online reference documentation for the function to access the bytes directly.

    resp.DisposeHttpResponse()

    fmt.Println("Success.")

    http.DisposeHttp()
    queryParams.DisposeJsonObject()
    bd.DisposeBinData()