DataFlex

Bandwidth Throttled Asynchronous HTTP Upload

See more Upload Examples

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. DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoUpload
    String sTemp1
    Integer iTemp1
    Integer iTemp2
    Integer iTemp3
    Boolean bTemp1

    Move False To iSuccess

    Get Create (RefClass(cComChilkatUpload)) To hoUpload
    If (Not(IsComObjectCreated(hoUpload))) Begin
        Send CreateComObject of hoUpload
    End

    // Specify the page (ASP, ASP.NET, Perl, Python, Ruby, CGI, etc)
    // that will process the HTTP Upload.
    Set ComHostname Of hoUpload To "www.mywebserver.com"
    Set ComPath Of hoUpload To "/receiveUpload.aspx"

    // Add one or more files to be uploaded.
    Send ComAddFileReference To hoUpload "file1" "dude.gif"
    Send ComAddFileReference To hoUpload "file2" "pigs.xml"
    Send ComAddFileReference To hoUpload "file3" "sample.doc"

    // Set the BandwidthThrottleUp property to throttle to approx 64K/second
    Set ComBandwidthThrottleUp Of hoUpload To 65536

    // Begin the HTTP upload in a background thread:
    Get ComBeginUpload Of hoUpload To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoUpload To sTemp1
        Showln sTemp1
    End
    Else Begin
        Showln "Upload started..."
    End

    // Wait for the upload to finish.
    // Print the progress as we wait...
    While ((ComUploadInProgress(hoUpload)) = True)
        // 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:
        Get ComPercentUploaded Of hoUpload To iTemp1
        Get ComNumBytesSent Of hoUpload To iTemp2
        Get ComTotalUploadSize Of hoUpload To iTemp3
        Showln iTemp1 "% " iTemp2 "/" iTemp3

        // Sleep 2/10ths of a second.
        Send ComSleepMs To hoUpload 200

    Loop

    // Did the upload succeed?
    Get ComUploadSuccess Of hoUpload To bTemp1
    If (bTemp1 = True) Begin
        Showln "Files uploaded!"
    End
    Else Begin
        Get ComLastErrorText Of hoUpload To sTemp1
        Showln sTemp1
    End



End_Procedure