Em Sunday, 5 de June de 2011, às 13:06:07, tushar mehta escreveu: > Hi all, > > I am currently trying to understand how kde applications uses kio > for doing file related operations. I am currently working on kget and > as part of my summer of code project task I need to figure out how > we can have speed limit on transfer using kio protocols like http/ftp. > > Do have we have any sample examples or documentation related > to KIO?
I don't think there's any documentation on that. Just read the source code,
starting at KIO::Connection.
But to simplify what you're looking for: kioslaves use blocking methods. They
read from the network one chunk of data and then they send that chunk of data
to the application (via KIO::Connection). The application also uses
KIO::Connection to read that chunk of data.
When the ioslave fills up the kernel transfer buffer, KIO::Connection will
block, waiting for the application to read from the same buffer.
In order to implement a rate control in the ioslave, you simply need to
implement a rate control in the application. After the stabilisation phase,
the ioslave will download at the same rate that the application reads from the
slave.
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Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
Senior Product Manager - Nokia, Qt Development Frameworks
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