You have to be careful when changing the UA as there are sites that do
the most absurd checks.
For example including applicationVersion could easily trigger WebKit
to be detected as another
(probably much older) browser -- i believe it is necessary to avoid
ever having the string "4." in the
UA for example as there are used to be) sites that assume that
indexOf("4.") != -1 means the your
browser is netscape 4 and supports the layers extension, eg. as done
at http://www.sloppycode.net/code-snippets/javascript/web-safe-palette.aspx
(This page works unless there's a 4 in the UA version)
So at the very least i would be careful about including version info,
you also can't remove
Mozilla/5.0, WebKit, KHTML, Gecko, or Safari because people look for
those substrings
(Mozilla/5.0 means you're not IE -- although there's also a more
modern version
where "Firefox" means not IE and that breaks at least one site i know
of and use *grumble*)
All in all i'll just reiterate that changes to the UA flags are
*dangerous* and can easily cause sites to
"break"
--Oliver
On Feb 12, 2008, at 1:38 AM, Benjamin Meyer wrote:
As it is today Qt's default user agent (in qwebpage.cpp) is hard
coded to:
"Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en) AppleWebKit/523.15
(KHTML,
like Gecko) Safari/419.3 Qt"
Seeing as this library will be used inside of many other
applications it makes
sense to include by default at least the application name/version
when they
are set. QCoreApplication gives us several strings which can be used.
applicationName, applicationVersion, organizationDomain,
organizationName
But at a bigger question, what should be included (or not included)
with the
default user agent? Is there docs anywhere that suggest what webkit
library
users should use as their user agent string?
-Benjamin Meyer
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