CkPython Requires Chilkat v11.7.0+

Generate a QR Code PNG in Memory

See more QR Code Examples

Demonstrates getting a QR code image without writing a file. With no output options the result is a PNG returned as base64 in outputs[0].base64 of the response. The example decodes it into a BinData, which holds the bytes of the PNG to send in an HTTP response, store in a database, attach to an email, or save. CkPython

import sys
import chilkat

success = False

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

json = chilkat.CkJsonObject()
json.UpdateString("payload.text","https://www.chilkatsoft.com/")
json.UpdateInt("render.moduleSize",6)

fmt = chilkat.CkFormats()
jsonOut = chilkat.CkJsonObject()
success = fmt.QrCode("generate",json,jsonOut)
if (success == False):
    print(fmt.lastErrorText())
    sys.exit()

print("format: " + jsonOut.stringOf("outputs[0].format"))
print("MIME type: " + jsonOut.stringOf("outputs[0].mimeType"))
print("image: " + str(jsonOut.IntOf("outputs[0].width")) + " x " + str(jsonOut.IntOf("outputs[0].height")) + " pixels")

#  outputs[0].base64 is the PNG file, base64 encoded.
bdPng = chilkat.CkBinData()
success = bdPng.AppendEncoded(jsonOut.stringOf("outputs[0].base64"),"base64")
if (success == False):
    print(bdPng.lastErrorText())
    sys.exit()

print("PNG bytes: " + str(bdPng.get_NumBytes()))

#  The BinData holds the image.  Here it is simply saved.
success = bdPng.WriteFile("qa_output/qr_in_memory.png")
if (success == False):
    print(bdPng.lastErrorText())
    sys.exit()

#  The PNG held in bdPng:

#  

#  Sample output:

#  format: png
#  MIME type: image/png
#  image: 222 x 222 pixels
#  PNG bytes: 877