Lianja

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. Lianja

llSuccess = .F.

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

loHttp = createobject("CkHttp")

// 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]

loQueryParams = createobject("CkJsonObject")
loQueryParams.UpdateString("data","Hello World")
loQueryParams.UpdateString("size","100x100")

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

// Send the GET request to an endpoint.
// Chilkat will add the url-encoded query params passed in the JSON.
loResp = createobject("CkHttpResponse")
llSuccess = loHttp.HttpParams("GET","https://api.qrserver.com/v1/create-qr-code/",loQueryParams,loResp)
if (llSuccess = .F.) then
    ? loHttp.LastErrorText
    release loHttp
    release loQueryParams
    release loResp
    return
endif

// Did it succeed?
if (loResp.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...)
    ? loResp.BodyStr
    ? "Response status = " + str(loResp.StatusCode)
    ? "Failed."
    release loHttp
    release loQueryParams
    release loResp
    return
endif

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

// Or get the bytes:
loBd = createobject("CkBinData")
loResp.GetBodyBd(loBd)
// Use the bytes in bd...
// See the online reference documentation for the function to access the bytes directly.

? "Success."


release loHttp
release loQueryParams
release loResp
release loBd