Get Size of Download using HTTP HEAD

Get the size of a download using an HTTP HEAD request.

Download Chilkat HTTP ActiveX

CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr 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

    DECLARE @resp int

    EXEC sp_OAMethod @http, 'GetHead', @resp OUT, 'http://www.chilkatsoft.com/download/ChilkatDotNet2.msi'
    IF @resp Is NULL 
      BEGIN
        EXEC sp_OAGetProperty @http, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
      END
    ELSE
      BEGIN
        DECLARE @sizeStr nvarchar(4000)

        EXEC sp_OAMethod @resp, 'GetHeaderField', @sizeStr OUT, 'Content-Length'
        IF @sizeStr Is NULL 
          BEGIN
            PRINT 'No content-length header field'
          END
        ELSE
          BEGIN
            --  Show the size of the file.
            --  You may convert the size string to an integer...
            PRINT @sizeStr
          END
      END


END
GO