Rollback is usefull mainly for checking if file is not changed.
You check (compare) download data with your file.
freddy77
>
> Quoting ZIGLIO Frediano ([EMAIL PROTECTED]):
>
> > I suggest two parameter:
> > - rollback-size
> > - rollback-check-size
> > where 0 <= rollback-check-size <= rollback-size
> > The first for calculate the beginning of range (filesize -
> rollback-size)
> > and the second for check (wget should check the range [filesize -
> > rollback-size,filesize - rollback-size + rollback-check-size) )
>
> My understanding of the rollback problem is that there are some broken
> proxies that do add some additional text garabge after the conection
> has timed out for example. Then, for `--rollback-size=NUM' after
> timing-out, wget shall cut the last NUM bytes of the file and try to
> resume the download.
>
> Chould you elaborate more on the situation where something like
> `--rollback-check-size' would be needed? What shall be checked there?
>
> -- jan
>
> --------------------+-----------------------------------------
> -------------
> Jan Prikryl | vr|vis center for virtual reality and
> visualisation
> <[EMAIL PROTECTED]> | http://www.vrvis.at
> --------------------+-----------------------------------------
> -------------
>
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