(SQL Server) Bandwidth Throttled Asynchronous HTTP Upload

Demonstrates how to do an HTTP upload asynchronously in a background thread with limiting the rate to an approximate number of bytes/second. The only difference between this example and one without bandwidth throttling is that the BandwidthThrottleUp property is set.

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
    DECLARE @iTmp1 int
    DECLARE @iTmp2 int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @upload int
    -- Use "Chilkat_9_5_0.Upload" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.Upload', @upload OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    -- Specify the page (ASP, ASP.NET, Perl, Python, Ruby, CGI, etc)
    -- that will process the HTTP Upload.
    EXEC sp_OASetProperty @upload, 'Hostname', 'www.mywebserver.com'
    EXEC sp_OASetProperty @upload, 'Path', '/receiveUpload.aspx'

    -- Add one or more files to be uploaded.
    EXEC sp_OAMethod @upload, 'AddFileReference', NULL, 'file1', 'dude.gif'
    EXEC sp_OAMethod @upload, 'AddFileReference', NULL, 'file2', 'pigs.xml'
    EXEC sp_OAMethod @upload, 'AddFileReference', NULL, 'file3', 'sample.doc'

    -- Set the BandwidthThrottleUp property to throttle to approx 64K/second
    EXEC sp_OASetProperty @upload, 'BandwidthThrottleUp', 65536

    -- Begin the HTTP upload in a background thread:
    DECLARE @success int
    EXEC sp_OAMethod @upload, 'BeginUpload', @success OUT
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @upload, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
      END
    ELSE
      BEGIN

        PRINT 'Upload started...'
      END

    -- Wait for the upload to finish.
    -- Print the progress as we wait...
    EXEC sp_OAGetProperty @upload, 'UploadInProgress', @iTmp0 OUT
    WHILE (@iTmp0 = 1)
      BEGIN
        -- We can abort the upload at any point by calling:
        -- upload.AbortUpload();

        -- Display the percentage complete and the number of bytes uploaded so far..
        -- The total upload size will become set after the upload begins:
        EXEC sp_OAGetProperty @upload, 'PercentUploaded', @iTmp0 OUT

        EXEC sp_OAGetProperty @upload, 'NumBytesSent', @iTmp1 OUT

        EXEC sp_OAGetProperty @upload, 'TotalUploadSize', @iTmp2 OUT
        PRINT @iTmp0 + '% ' + @iTmp1 + '/' + @iTmp2

        -- Sleep 2/10ths of a second.
        EXEC sp_OAMethod @upload, 'SleepMs', NULL, 200

      END

    -- Did the upload succeed?
    EXEC sp_OAGetProperty @upload, 'UploadSuccess', @iTmp0 OUT
    IF @iTmp0 = 1
      BEGIN

        PRINT 'Files uploaded!'
      END
    ELSE
      BEGIN
        EXEC sp_OAGetProperty @upload, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
      END

    EXEC @hr = sp_OADestroy @upload


END
GO