(SQL Server) Download a Zip from a URL and OpenBd. (No .zip file is created)

Demonstrates how to download a .zip from a URL, opens the Zip, and gets the contents of a file. No file is ever written.

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

    DECLARE @http int
    -- Use "Chilkat_9_5_0.Http" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.Http', @http OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @bd int
    -- Use "Chilkat_9_5_0.BinData" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.BinData', @bd OUT

    -- This URL is valid and can be tested...
    DECLARE @success int
    EXEC sp_OAMethod @http, 'QuickGetBd', @success OUT, 'http://chilkatdownload.com/example_data/hamlet.zip', @bd
    EXEC sp_OAGetProperty @http, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 <> 1
      BEGIN
        EXEC sp_OAGetProperty @http, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @http
        EXEC @hr = sp_OADestroy @bd
        RETURN
      END

    DECLARE @zip int
    -- Use "Chilkat_9_5_0.Zip" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.Zip', @zip OUT

    -- Open the zip from the bytes contained in bd.
    EXEC sp_OAMethod @zip, 'OpenBd', @success OUT, @bd
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @zip, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @http
        EXEC @hr = sp_OADestroy @bd
        EXEC @hr = sp_OADestroy @zip
        RETURN
      END

    -- Get the entry for the file we want..
    DECLARE @entry int
    EXEC sp_OAMethod @zip, 'GetEntryByName', @entry OUT, 'hamlet.xml'
    EXEC sp_OAGetProperty @zip, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 <> 1
      BEGIN
        EXEC sp_OAGetProperty @zip, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @http
        EXEC @hr = sp_OADestroy @bd
        EXEC @hr = sp_OADestroy @zip
        RETURN
      END

    -- Convert all line endings to CRLF (if needed)
    DECLARE @lineEndingBehavior int
    SELECT @lineEndingBehavior = 2
    DECLARE @xmlStr nvarchar(4000)
    EXEC sp_OAMethod @entry, 'UnzipToString', @xmlStr OUT, @lineEndingBehavior, 'utf-8'
    EXEC sp_OAGetProperty @entry, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 <> 1
      BEGIN
        EXEC sp_OAGetProperty @entry, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @entry

        EXEC @hr = sp_OADestroy @http
        EXEC @hr = sp_OADestroy @bd
        EXEC @hr = sp_OADestroy @zip
        RETURN
      END

    -- The XML in this case is about 274K, so let's just examine the last 20 lines...
    DECLARE @sb int
    -- Use "Chilkat_9_5_0.StringBuilder" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.StringBuilder', @sb OUT

    EXEC sp_OAMethod @sb, 'Append', @success OUT, @xmlStr

    EXEC sp_OAMethod @sb, 'LastNLines', @sTmp0 OUT, 20, 1
    PRINT @sTmp0

    EXEC @hr = sp_OADestroy @entry


    EXEC @hr = sp_OADestroy @http
    EXEC @hr = sp_OADestroy @bd
    EXEC @hr = sp_OADestroy @zip
    EXEC @hr = sp_OADestroy @sb


END
GO