QUser class wanted

kshegunov

Wow, I think it's a not uncommon requirement! Of course I don't mind you asking.

Some people do and I have never needed it, so I'd qualified it as uncommon in my mind. ;)

My targets may be Windows or Linux, users might be a single user on own PC or member of team logged onto a network. Obviously I know the information about the user varies across these, I'll take whatever I'm given.

If python allows you to directly call the system you could try whoami which supposedly should work on both windows and linux. If you don't have system (or akin) in python, alternatively you could use QProcess to invoke the command line interpreter and run it. See for example:

https://technet.microsoft.com/en-us/library/cc771299(v=ws.11).aspx
http://www.linfo.org/whoami.html

I can't tell you how it retrieves that information though, so it may very well depend on the environment variables as well.

JonB

@kshegunov said in QUser class wanted:

If python allows you to directly call the system you could try whoami which supposedly should work on both windows and linux. If you don't have system (or akin) in python, alternatively you could use QProcess to invoke the command line interpreter and run it.

Thanks, but I'd rather use environment variables than run an OS command!! I'll look through the python os module and find some calls which give me the best from what's there, I think.

kshegunov

The last option is to write the C++ class, write a proposal in the bug tracker where you say why you need this and where it should go, provide testing and documentation for that code and have it included in Qt. Then wait (or appeal to the devs) for it to get python binding.
It's not exactly a very quick process, but if you think it's needed we would all appreciate your effort. :)

JonB

@kshegunov
Did I mention I kinda want to start using this on Monday...? ;-)

Yep, point taken. I have only just gotten involved in Qt, and Python. Thanks for suggestions.

jsulm

@JNBarchan said in QUser class wanted:

I would like to affect my Qt application's UI depending on who the end user is

Why do you need user name for that? Isn't it just user configuration stored in user home directory (UNIX/LINUX) or user part of the registry on Windows? For that you can use QSettings.

JonB

@jsulm said in QUser class wanted:

@JNBarchan said in QUser class wanted:

I would like to affect my Qt application's UI depending on who the end user is

Why do you need user name for that? Isn't it just user configuration stored in user home directory (UNIX/LINUX) or user part of the registry on Windows? For that you can use QSettings.

That works where the UI alterations are purely controlled by a user's own "preferences". However, not when the rules are imposed by the system/Administrator, and are not to be overridden by some user's fancy. For example, some areas of the system are only to be accessible to "administrators" and not to "plain users". I don't want some end user to go editing his own file/registry to switch on things he should not have access to!

Doubtless in practice this will be implemented by assigning "roles" to users for the checks, rather than directly on the username. But I need to know the name securely to determine the correct role(s). Role membership may be implemented via the application having a database table of "username+role", or possibly via native Linux/Windows "group" membership, if I can determine that similarly securely (again, QUser class could have included group membership cross-platform just like username, as it is I would have to write that myself with the same problems as for username).

Additionally, I may wish to log the user's name in log files from the application or from MySQL. Again, I want the secure, correct user's name, not what he might fancy poking into a settings.ini file/registry, environment variable or similar!