Comment 2 for bug 691167

How do you intend to blacklist events with specific payloads then ?

On Thu, Dec 16, 2010 at 6:37 PM, Markus Korn <email address hidden> wrote:

> Manish, is this (esp. the last few lines `"dbus.Array([],
> signature=dbus.Signature('y'))"`) something you get somewhere with real
> code (if so, please attach a minimal reproducer) or is it *just* loud
> thinking?
>
> payload is in fact an array of bytes, as defined in the dbus signature.
> You should not care about the weirdness done in zeitgeist, it should
> just do the right thing. It does the right thing because a String in
> python is in first approximation just an array of bytes (I know this
> statement is not 100% true for all python versions, but it is good
> enough for our needs)
>
> There are only two possible reasons where this assumtion would fail:
> * we want to support python 2.x and 3.x at the same time, which is a no-go
> * I'm missing something ;) - please prove me wrong with some code.
>
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> Zeitgeist Project.
> https://bugs.launchpad.net/bugs/691167
>
> Title:
> The payload is sometimes mentioned as string and sometimes as array of
> bytes
>
> Status in Zeitgeist Framework:
> New
>
> Bug description:
> In the event serialization format, the third array is array of bytes or ay
> as dbus signature.
>
> When an event enters an extension, it looks like
> Event([dbus.Array([u'', u'1292500628312', u'', u'',
> u'application://foo.desktop'], signature=dbus.Signature('s')),
> [Subject([u'', u'', u'', u'', u'', u'', u''])], dbus.Array([],
> signature=dbus.Signature('y'))])
>
> which implies that payload is array of bytes
>
> Now look at _zeitgeist/engine/datamodel.py at line 58
> where you get the line
> >> popo.append(str(ev[2]))
>
> Really so when you do str() on dbus.Array([],
> signature=dbus.Signature('y'))
> you get "dbus.Array([], signature=dbus.Signature('y'))" instead of the
> contents of bytes converted to string
>
>
> Now when you call Event.get_plain on
>
> Event([dbus.Array([u'', u'1292500628312', u'', u'',
> u'application://foo.desktop'], signature=dbus.Signature('s')),
> [Subject([u'', u'', u'', u'', u'', u'', u''])], dbus.Array([],
> signature=dbus.Signature('y'))])
>
> you get
>
> [[u'', u'1292500628312', u'', u'', u'application://foo.desktop'], [[u'',
> u'', u'', u'', u'', u'', u'']], "dbus.Array([],
> signature=dbus.Signature('y'))"]
>
> Now what you expect
>
>
>

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