Check File Size using HEAD Request

Demonstrates how to quickly check the size of an HTTP download by using the HEAD request.

Download Chilkat HTTP ActiveX

CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @iTmp0 int
    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 @success int

    --  Any string unlocks the component for the 1st 30-days.
    EXEC sp_OAMethod @http, 'UnlockComponent', @success OUT, 'Anything for 30-day trial'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @http, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        RETURN
      END

    --  Send a HEAD request to get the response header:
    DECLARE @response int

    EXEC sp_OAMethod @http, 'GetHead', @response OUT, 'http://www.chilkatsoft.com/download/ChilkatDotNet2.msi'

    IF @response Is NULL 
      BEGIN
        EXEC sp_OAGetProperty @http, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
      END
    ELSE
      BEGIN

        --  The ContentLength property of the HTTP response is
        --  the size of the remote file:

        EXEC sp_OAGetProperty @response, 'ContentLength', @iTmp0 OUT

        PRINT 'Size of download = ' + @iTmp0

      END
END
GO