SQL Server

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. SQL Server

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @iTmp0 int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 0

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

    DECLARE @http int
    EXEC @hr = sp_OACreate 'Chilkat.Http', @http OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    -- 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]

    DECLARE @queryParams int
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @queryParams OUT

    EXEC sp_OAMethod @queryParams, 'UpdateString', @success OUT, 'data', 'Hello World'
    EXEC sp_OAMethod @queryParams, 'UpdateString', @success OUT, 'size', '100x100'

    -- Get a PNG file..
    -- Possible formats are:
    -- png
    -- gif
    -- jpeg
    -- jpg
    -- svg
    -- eps
    -- Case matters.  Use lowercase.
    EXEC sp_OAMethod @queryParams, 'UpdateString', @success OUT, 'format', 'png'

    -- Send the GET request to an endpoint.
    -- Chilkat will add the url-encoded query params passed in the JSON.
    DECLARE @resp int
    EXEC @hr = sp_OACreate 'Chilkat.HttpResponse', @resp OUT

    EXEC sp_OAMethod @http, 'HttpParams', @success OUT, 'GET', 'https://api.qrserver.com/v1/create-qr-code/', @queryParams, @resp
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @http, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @http
        EXEC @hr = sp_OADestroy @queryParams
        EXEC @hr = sp_OADestroy @resp
        RETURN
      END

    -- Did it succeed?
    EXEC sp_OAGetProperty @resp, 'StatusCode', @iTmp0 OUT
    IF @iTmp0 <> 200
      BEGIN
        -- The response body, if anything, would not be the image data, but would likely be the error text (or HTML, or whatever...)
        EXEC sp_OAGetProperty @resp, 'BodyStr', @sTmp0 OUT
        PRINT @sTmp0

        EXEC sp_OAGetProperty @resp, 'StatusCode', @iTmp0 OUT
        PRINT 'Response status = ' + @iTmp0

        PRINT 'Failed.'
        EXEC @hr = sp_OADestroy @http
        EXEC @hr = sp_OADestroy @queryParams
        EXEC @hr = sp_OADestroy @resp
        RETURN
      END

    -- Success if we get here..
    -- Save the binary body as the PNG file, or you can get the bytes of the PNG..
    EXEC sp_OAMethod @resp, 'SaveBodyBinary', @success OUT, 'c:/temp/qa_output/qr_code.png'

    -- Or get the bytes:
    DECLARE @bd int
    EXEC @hr = sp_OACreate 'Chilkat.BinData', @bd OUT

    EXEC sp_OAMethod @resp, 'GetBodyBd', @success OUT, @bd
    -- Use the bytes in bd...
    -- See the online reference documentation for the function to access the bytes directly.


    PRINT 'Success.'

    EXEC @hr = sp_OADestroy @http
    EXEC @hr = sp_OADestroy @queryParams
    EXEC @hr = sp_OADestroy @resp
    EXEC @hr = sp_OADestroy @bd


END
GO