(Ruby) 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 Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

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

http = Chilkat::CkHttp.new()

# 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::CkJsonObject.new()
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 is a CkHttpResponse
resp = http.QuickRequestParams("GET","https://api.qrserver.com/v1/create-qr-code/",queryParams)
if (http.get_LastMethodSuccess() == false)
    print http.lastErrorText() + "\n";
    exit
end

# Did it succeed?
if (resp.get_StatusCode() != 200)
    # The response body, if anything, would not be the image data, but would likely be the error text (or HTML, or whatever...)
    print resp.bodyStr() + "\n";
    print "Response status = " + resp.get_StatusCode().to_s() + "\n";
    print "Failed." + "\n";

    exit
end

# 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::CkBinData.new()
resp.GetBodyBd(bd)
# Use the bytes in bd...
# See the online reference documentation for the function to access the bytes directly.

print "Success." + "\n";