(SQL Server) Example: Http.DownloadHash method

Demonstrates the DownloadHash method.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

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

    DECLARE @url nvarchar(4000)
    SELECT @url = 'https://chilkatdownload.com/11.1.0/chilkat2-python-3.13-x64.zip'
    DECLARE @encodedHash nvarchar(4000)
    EXEC sp_OAMethod @http, 'DownloadHash', @encodedHash OUT, @url, 'sha256', 'hex_lower'
    EXEC sp_OAGetProperty @http, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 = 0
      BEGIN
        EXEC sp_OAGetProperty @http, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @http
        RETURN
      END

    -- Expected value: 32583182374888c7761e7c15b998fd1d326c439c704d59380d34599f4be9b63a

    PRINT 'sha256 = ' + @encodedHash

    EXEC @hr = sp_OADestroy @http


END
GO