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

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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 Xojo Plugin Download Xojo Plugin for Windows, Linux, Mac OS X, and ARM, ARM64

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

Dim http As New Chilkat.Http
Dim success As Boolean

// 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]

Dim queryParams As New Chilkat.JsonObject
success = queryParams.UpdateString("data","Hello World")
success = queryParams.UpdateString("size","100x100")

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

// Send the GET request to an endpoint.
// Chilkat will add the url-encoded query params passed in the JSON.
Dim resp As Chilkat.HttpResponse
resp = http.QuickRequestParams("GET","https://api.qrserver.com/v1/create-qr-code/",queryParams)
If (http.LastMethodSuccess = False) Then
    System.DebugLog(http.LastErrorText)
    Return
End If

// Did it succeed?
If (resp.StatusCode <> 200) Then
    // The response body, if anything, would not be the image data, but would likely be the error text (or HTML, or whatever...)
    System.DebugLog(resp.BodyStr)
    System.DebugLog("Response status = " + Str(resp.StatusCode))
    System.DebugLog("Failed.")

    Return
End If

// 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:
Dim bd As New Chilkat.BinData
success = resp.GetBodyBd(bd)
// Use the bytes in bd...
// See the online reference documentation for the function to access the bytes directly.

System.DebugLog("Success.")