Hello!
Today one of my students told me about the problems he experiences
trying to login into Sage Notebook server. In short, the problem was
that he entered his login name with the first letter in upper case.
I was surprised that Notebook distinguishes between the names with
upper case and lower case letters, since it is usually ignored for
logins everywhere.
However, what is worse, Sage Notebook does not give any message about
incorrect (non-existent in this case) login name - just and "Error 500"
screen.
Meanwhile in the console log I can see the following message:
############################################
2014-07-22 20:01:15+0300 [-] WSGI application error
Traceback (most recent call last):
File
"/usr/lib64/python2.7/site-packages/twisted/python/threadpool.py", line
196, in _worker result = context.call(ctx, function, *args, **kwargs)
File "/usr/lib64/python2.7/site-packages/twisted/python/context.py",
line 118, in callWithContext return self.currentContext
().callWithContext(ctx, func, *args, **kw) File
"/usr/lib64/python2.7/site-packages/twisted/python/context.py", line
81, in callWithContext return func(*args,**kw) File
"/usr/lib64/python2.7/site-packages/twisted/web/wsgi.py", line 332, in
run self.reactor.callFromThread(wsgiError, self.started, *exc_info())
--- <exception caught here> ---
File
"/usr/lib64/python2.7/site-packages/twisted/web/wsgi.py", line 315, in
run appIterator = self.application(self.environ, self.startResponse)
File "/usr/lib64/python2.7/site-packages/flask/app.py", line 1836, in
__call__ return self.wsgi_app(environ, start_response) File
"/usr/lib64/python2.7/site-packages/flask/app.py", line 1820, in
wsgi_app response = self.make_response(self.handle_exception(e)) File
"/usr/lib64/python2.7/site-packages/flask/app.py", line 1403, in
handle_exception reraise(exc_type, exc_value, tb) File
"/usr/lib64/python2.7/site-packages/flask/app.py", line 1817, in
wsgi_app response = self.full_dispatch_request() File
"/usr/lib64/python2.7/site-packages/flask/app.py", line 1477, in
full_dispatch_request rv = self.handle_user_exception(e) File
"/usr/lib64/python2.7/site-packages/flask/app.py", line 1381, in
handle_user_exception reraise(exc_type, exc_value, tb) File
"/usr/lib64/python2.7/site-packages/flask/app.py", line 1475, in
full_dispatch_request rv = self.dispatch_request() File
"/usr/lib64/python2.7/site-packages/flask/app.py", line 1461, in
dispatch_request return self.view_functions[rule.endpoint]
(**req.view_args) File
"/usr/lib64/python2.7/site-packages/sagenb/flask_version/authentication.py",
line 42, in login U = g.notebook.user_manager().user(username) File
"/usr/lib64/python2.7/site-packages/sagenb/notebook/user_manager.py",
line 112, in user return self._user(username) File
"/usr/lib64/python2.7/site-packages/sagenb/notebook/user_manager.py",
line 522, in _user raise LookupError("no user '{}'".format(username))
exceptions.LookupError: no user 'V_2e'
############################################
Vladimir
-----
<v...@ukr.net>
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