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Some cgi-bin actions may take a very long time, such as catalog loading or dumping. When an action is likely to take a long time, the cgi-bin emits white space characters from time to time to provide a user feedback. When the action begins a blank page is shown to the user and the status bar of the navigator shows that some characters are received.
This feedback serves two purposes : it shows that the action is doing something and keeps the connection alive so that the HTTP server does not timeout.
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