SQL Server

Download Web Page to MHT and Extract Images (all in memory)

See more MHT / HTML Email Examples

Downloads a web page to an MHT archive (in memory) and then extracts each image to a byte array in memory. 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
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 0

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

    --  Note: This URL exists at the time of writing and testing this example (on 12-June-2020)
    --  However, it will surely not continue to exist for very long.
    --  You should choose a different URL.  (Any web page with images will do.)
    DECLARE @url nvarchar(4000)
    SELECT @url = 'https://www.fendi.com/it/abbigliamento-uomo/cravatta-fxc160a3nwf0qg2'

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

    --  Downloads to an MHT string.
    --  MHT is just MIME, which is the same format as an email but with different semantics.
    DECLARE @mhtStr nvarchar(4000)
    EXEC sp_OAMethod @mht, 'GetMHT', @mhtStr OUT, @url
    EXEC sp_OAGetProperty @mht, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 = 0
      BEGIN
        EXEC sp_OAGetProperty @mht, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @mht
        RETURN
      END

    --  We can still treat the MHT MIME as an email and iterate over the "related items".
    DECLARE @email int
    EXEC @hr = sp_OACreate 'Chilkat.Email', @email OUT

    EXEC sp_OAMethod @email, 'SetFromMimeText', @success OUT, @mhtStr
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @email, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @mht
        EXEC @hr = sp_OADestroy @email
        RETURN
      END

    DECLARE @numRelatedItems int
    EXEC sp_OAGetProperty @email, 'NumRelatedItems', @numRelatedItems OUT
    DECLARE @i int
    SELECT @i = 0
    DECLARE @sbContentType int
    EXEC @hr = sp_OACreate 'Chilkat.StringBuilder', @sbContentType OUT

    WHILE @i < @numRelatedItems
      BEGIN
        EXEC sp_OAMethod @email, 'GetRelatedContentType', @sTmp0 OUT, @i
        EXEC sp_OAMethod @sbContentType, 'SetString', @success OUT, @sTmp0

        EXEC sp_OAMethod @sbContentType, 'GetAsString', @sTmp0 OUT
        PRINT 'Content-Type: ' + @sTmp0

        EXEC sp_OAMethod @sbContentType, 'StartsWith', @iTmp0 OUT, 'image/', 0
        IF @iTmp0 = 1
          BEGIN
            --  We have an image.
            --  Get the image data.
ERROR: Cannot use pbytes in SQL Server examples...
            EXEC sp_OAMethod @email, 'GetRelatedData', @imageData OUT, @i

            --  Do what you need with the image data..
          END
        SELECT @i = @i + 1
      END

    EXEC @hr = sp_OADestroy @mht
    EXEC @hr = sp_OADestroy @email
    EXEC @hr = sp_OADestroy @sbContentType


END
GO