(SQL Server) Unzip Selected Files from a Zip Archive

Demonstrates how to iterate over the files contained within a .zip and unzip specific files.

Note: This example requires Chilkat v11.0.0 or greater.

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 @success int
    SELECT @success = 0

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

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

    EXEC sp_OAMethod @zip, 'OpenZip', @success OUT, 'my_files.zip'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @zip, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @zip
        RETURN
      END

    DECLARE @unzipDir nvarchar(4000)
    SELECT @unzipDir = '/temp/unzipDir'

    -- Get the number of files and directories in the .zip
    DECLARE @n int
    EXEC sp_OAGetProperty @zip, 'NumEntries', @n OUT

    DECLARE @entry int
    EXEC @hr = sp_OACreate 'Chilkat.ZipEntry', @entry OUT

    DECLARE @i int
    SELECT @i = 0
    WHILE @i < @n
      BEGIN

        EXEC sp_OAMethod @zip, 'EntryAt', @success OUT, @i, @entry
        EXEC sp_OAGetProperty @entry, 'IsDirectory', @iTmp0 OUT
        IF @iTmp0 = 0
          BEGIN
            -- (the filename may include a path)
            EXEC sp_OAGetProperty @entry, 'FileName', @sTmp0 OUT
            PRINT @sTmp0

            -- Your application may choose to unzip this entry
            -- based on the filename.
            -- If the entry should be unzipped, then call Extract(unzipDir)
            EXEC sp_OAMethod @entry, 'Extract', @success OUT, @unzipDir
            IF @success = 0
              BEGIN
                EXEC sp_OAGetProperty @entry, 'LastErrorText', @sTmp0 OUT
                PRINT @sTmp0
                EXEC @hr = sp_OADestroy @zip
                EXEC @hr = sp_OADestroy @entry
                RETURN
              END

          END
        SELECT @i = @i + 1
      END

    EXEC @hr = sp_OADestroy @zip
    EXEC @hr = sp_OADestroy @entry


END
GO