25be88932c
We've been running into OoM issues with this functionality while executing on one of our smaller application servers. - Sometimes this manifests by preventing the entire page from loading (exception during the GET). - At others, it occurs using the `Delete course from site` functionality by breaking during the POST handler. This case is particularly frustrating because the course actually is deleted, but looks like it may not have been. Internally, this is because the 500 error occurs _after_ the course has been successfully deleted, though this is opaque to the end-user. While this doesn't address the underlying memory issue, it does at least allow the app to recover gracefully.
661 lines
25 KiB
Python
661 lines
25 KiB
Python
"""
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This module creates a sysadmin dashboard for managing and viewing
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courses.
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"""
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from __future__ import absolute_import
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import unicodecsv as csv
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import json
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import logging
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import os
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import StringIO
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import subprocess
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import mongoengine
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from django.conf import settings
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from django.contrib.auth import authenticate
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from django.contrib.auth.decorators import login_required
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from django.contrib.auth.models import User
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from django.core.exceptions import PermissionDenied
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from django.core.paginator import EmptyPage, PageNotAnInteger, Paginator
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from django.db import IntegrityError
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from django.http import Http404, HttpResponse
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from django.utils import timezone
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from django.utils.decorators import method_decorator
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from django.utils.html import escape
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from django.utils.translation import ugettext as _
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from django.views.decorators.cache import cache_control
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from django.views.decorators.csrf import ensure_csrf_cookie
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from django.views.decorators.http import condition
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from django.views.generic.base import TemplateView
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from opaque_keys.edx.keys import CourseKey
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from path import Path as path
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from six import text_type
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import dashboard.git_import as git_import
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import track.views
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from courseware.courses import get_course_by_id
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from dashboard.git_import import GitImportError
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from dashboard.models import CourseImportLog
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from edxmako.shortcuts import render_to_response
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from openedx.core.djangoapps.external_auth.models import ExternalAuthMap
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from openedx.core.djangoapps.user_api.accounts.utils import generate_password
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from openedx.core.djangolib.markup import HTML
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from student.models import CourseEnrollment, Registration, UserProfile
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from student.roles import CourseInstructorRole, CourseStaffRole
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from xmodule.modulestore.django import modulestore
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log = logging.getLogger(__name__)
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class SysadminDashboardView(TemplateView):
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"""Base class for sysadmin dashboard views with common methods"""
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template_name = 'sysadmin_dashboard.html'
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def __init__(self, **kwargs):
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"""
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Initialize base sysadmin dashboard class with modulestore,
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modulestore_type and return msg
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"""
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self.def_ms = modulestore()
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self.msg = u''
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self.datatable = []
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super(SysadminDashboardView, self).__init__(**kwargs)
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@method_decorator(ensure_csrf_cookie)
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@method_decorator(login_required)
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@method_decorator(cache_control(no_cache=True, no_store=True,
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must_revalidate=True))
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@method_decorator(condition(etag_func=None))
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def dispatch(self, *args, **kwargs):
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return super(SysadminDashboardView, self).dispatch(*args, **kwargs)
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def get_courses(self):
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""" Get an iterable list of courses."""
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return self.def_ms.get_courses()
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def return_csv(self, filename, header, data):
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"""
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Convenient function for handling the http response of a csv.
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data should be iterable and is used to stream object over http
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"""
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csv_file = StringIO.StringIO()
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writer = csv.writer(csv_file, dialect='excel', quotechar='"',
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quoting=csv.QUOTE_ALL)
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writer.writerow(header)
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# Setup streaming of the data
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def read_and_flush():
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"""Read and clear buffer for optimization"""
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csv_file.seek(0)
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csv_data = csv_file.read()
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csv_file.seek(0)
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csv_file.truncate()
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return csv_data
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def csv_data():
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"""Generator for handling potentially large CSVs"""
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for row in data:
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writer.writerow(row)
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csv_data = read_and_flush()
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yield csv_data
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response = HttpResponse(csv_data(), content_type='text/csv')
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response['Content-Disposition'] = u'attachment; filename={0}'.format(
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filename)
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return response
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class Users(SysadminDashboardView):
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"""
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The status view provides Web based user management, a listing of
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courses loaded, and user statistics
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"""
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def fix_external_auth_map_passwords(self):
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"""
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This corrects any passwords that have drifted from eamap to
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internal django auth. Needs to be removed when fixed in external_auth
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"""
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msg = ''
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for eamap in ExternalAuthMap.objects.all():
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euser = eamap.user
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epass = eamap.internal_password
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if euser is None:
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continue
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try:
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testuser = authenticate(username=euser.username, password=epass)
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except (TypeError, PermissionDenied, AttributeError) as err:
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# Translators: This message means that the user could not be authenticated (that is, we could
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# not log them in for some reason - maybe they don't have permission, or their password was wrong)
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msg += _(u'Failed in authenticating {username}, error {error}\n').format(
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username=euser,
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error=err
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)
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continue
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if testuser is None:
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# Translators: This message means that the user could not be authenticated (that is, we could
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# not log them in for some reason - maybe they don't have permission, or their password was wrong)
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msg += _(u'Failed in authenticating {username}\n').format(username=euser)
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# Translators: this means that the password has been corrected (sometimes the database needs to be resynchronized)
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# Translate this as meaning "the password was fixed" or "the password was corrected".
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msg += _('fixed password')
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euser.set_password(epass)
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euser.save()
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continue
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if not msg:
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# Translators: this means everything happened successfully, yay!
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msg = _('All ok!')
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return msg
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def create_user(self, uname, name, password=None):
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""" Creates a user (both SSL and regular)"""
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if not uname:
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return _('Must provide username')
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if not name:
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return _('Must provide full name')
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email_domain = getattr(settings, 'SSL_AUTH_EMAIL_DOMAIN', 'MIT.EDU')
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msg = u''
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if settings.FEATURES['AUTH_USE_CERTIFICATES']:
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if '@' not in uname:
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email = '{0}@{1}'.format(uname, email_domain)
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else:
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email = uname
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if not email.endswith('@{0}'.format(email_domain)):
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# Translators: Domain is an email domain, such as "@gmail.com"
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msg += _(u'Email address must end in {domain}').format(domain="@{0}".format(email_domain))
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return msg
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mit_domain = 'ssl:MIT'
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if ExternalAuthMap.objects.filter(external_id=email,
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external_domain=mit_domain):
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msg += _(u'Failed - email {email_addr} already exists as {external_id}').format(
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email_addr=email,
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external_id="external_id"
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)
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return msg
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new_password = generate_password()
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else:
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if not password:
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return _('Password must be supplied if not using certificates')
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email = uname
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if '@' not in email:
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msg += _('email address required (not username)')
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return msg
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new_password = password
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user = User(username=uname, email=email, is_active=True)
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user.set_password(new_password)
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try:
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user.save()
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except IntegrityError:
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msg += _(u'Oops, failed to create user {user}, {error}').format(
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user=user,
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error="IntegrityError"
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)
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return msg
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reg = Registration()
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reg.register(user)
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profile = UserProfile(user=user)
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profile.name = name
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profile.save()
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if settings.FEATURES['AUTH_USE_CERTIFICATES']:
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credential_string = getattr(settings, 'SSL_AUTH_DN_FORMAT_STRING',
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'/C=US/ST=Massachusetts/O=Massachusetts Institute of Technology/OU=Client CA v1/CN={0}/emailAddress={1}')
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credentials = credential_string.format(name, email)
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eamap = ExternalAuthMap(
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external_id=email,
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external_email=email,
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external_domain=mit_domain,
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external_name=name,
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internal_password=new_password,
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external_credentials=json.dumps(credentials),
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)
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eamap.user = user
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eamap.dtsignup = timezone.now()
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eamap.save()
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msg += _(u'User {user} created successfully!').format(user=user)
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return msg
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def delete_user(self, uname):
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"""Deletes a user from django auth"""
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if not uname:
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return _('Must provide username')
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if '@' in uname:
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try:
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user = User.objects.get(email=uname)
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except User.DoesNotExist as err:
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msg = _(u'Cannot find user with email address {email_addr}').format(email_addr=uname)
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return msg
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else:
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try:
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user = User.objects.get(username=uname)
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except User.DoesNotExist as err:
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msg = _(u'Cannot find user with username {username} - {error}').format(
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username=uname,
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error=str(err)
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)
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return msg
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user.delete()
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return _(u'Deleted user {username}').format(username=uname)
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def make_common_context(self):
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"""Returns the datatable used for this view"""
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self.datatable = {}
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self.datatable = dict(header=[_('Statistic'), _('Value')],
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title=_('Site statistics'))
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self.datatable['data'] = [[_('Total number of users'),
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User.objects.all().count()]]
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self.msg += HTML(u'<h2>{0}</h2>').format(
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_('Courses loaded in the modulestore')
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)
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self.msg += HTML(u'<ol>')
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for course in self.get_courses():
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self.msg += HTML(u'<li>{0} ({1})</li>').format(
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escape(text_type(course.id)), text_type(course.location))
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self.msg += HTML(u'</ol>')
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def get(self, request):
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if not request.user.is_staff:
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raise Http404
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self.make_common_context()
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context = {
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'datatable': self.datatable,
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'msg': self.msg,
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'djangopid': os.getpid(),
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'modeflag': {'users': 'active-section'},
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'edx_platform_version': getattr(settings, 'EDX_PLATFORM_VERSION_STRING', ''),
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}
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return render_to_response(self.template_name, context)
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def post(self, request):
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"""Handle various actions available on page"""
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if not request.user.is_staff:
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raise Http404
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self.make_common_context()
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action = request.POST.get('action', '')
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track.views.server_track(request, action, {}, page='user_sysdashboard')
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if action == 'download_users':
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header = [_('username'), _('email'), ]
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data = ([u.username, u.email] for u in
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(User.objects.all().iterator()))
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return self.return_csv('users_{0}.csv'.format(
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request.META['SERVER_NAME']), header, data)
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elif action == 'repair_eamap':
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self.msg = HTML(u'<h4>{0}</h4><pre>{1}</pre>{2}').format(
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_('Repair Results'),
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self.fix_external_auth_map_passwords(),
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self.msg)
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self.datatable = {}
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elif action == 'create_user':
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uname = request.POST.get('student_uname', '').strip()
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name = request.POST.get('student_fullname', '').strip()
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password = request.POST.get('student_password', '').strip()
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self.msg = HTML(u'<h4>{0}</h4><p>{1}</p><hr />{2}').format(
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_('Create User Results'),
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self.create_user(uname, name, password), self.msg)
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elif action == 'del_user':
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uname = request.POST.get('student_uname', '').strip()
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self.msg = HTML(u'<h4>{0}</h4><p>{1}</p><hr />{2}').format(
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_('Delete User Results'), self.delete_user(uname), self.msg)
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context = {
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'datatable': self.datatable,
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'msg': self.msg,
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'djangopid': os.getpid(),
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'modeflag': {'users': 'active-section'},
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'edx_platform_version': getattr(settings, 'EDX_PLATFORM_VERSION_STRING', ''),
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}
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return render_to_response(self.template_name, context)
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class Courses(SysadminDashboardView):
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"""
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This manages adding/updating courses from git, deleting courses, and
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provides course listing information.
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"""
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def git_info_for_course(self, cdir):
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"""This pulls out some git info like the last commit"""
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cmd = ''
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gdir = settings.DATA_DIR / cdir
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info = ['', '', '']
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# Try the data dir, then try to find it in the git import dir
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if not gdir.exists():
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git_repo_dir = getattr(settings, 'GIT_REPO_DIR', git_import.DEFAULT_GIT_REPO_DIR)
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gdir = path(git_repo_dir) / cdir
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if not gdir.exists():
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return info
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cmd = ['git', 'log', '-1',
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u'--format=format:{ "commit": "%H", "author": "%an %ae", "date": "%ad"}', ]
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try:
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output_json = json.loads(subprocess.check_output(cmd, cwd=gdir))
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info = [output_json['commit'],
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output_json['date'],
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output_json['author'], ]
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except OSError as error:
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log.warning(text_type(u"Error fetching git data: %s - %s"), text_type(cdir), text_type(error))
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except (ValueError, subprocess.CalledProcessError):
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pass
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return info
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def get_course_from_git(self, gitloc, branch):
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"""This downloads and runs the checks for importing a course in git"""
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if not (gitloc.endswith('.git') or gitloc.startswith('http:') or
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gitloc.startswith('https:') or gitloc.startswith('git:')):
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return _("The git repo location should end with '.git', "
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"and be a valid url")
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return self.import_mongo_course(gitloc, branch)
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def import_mongo_course(self, gitloc, branch):
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"""
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Imports course using management command and captures logging output
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at debug level for display in template
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"""
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msg = u''
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log.debug(u'Adding course using git repo %s', gitloc)
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# Grab logging output for debugging imports
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output = StringIO.StringIO()
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import_log_handler = logging.StreamHandler(output)
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import_log_handler.setLevel(logging.DEBUG)
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logger_names = ['xmodule.modulestore.xml_importer',
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'dashboard.git_import',
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'xmodule.modulestore.xml',
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'xmodule.seq_module', ]
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loggers = []
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for logger_name in logger_names:
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logger = logging.getLogger(logger_name)
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logger.setLevel(logging.DEBUG)
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logger.addHandler(import_log_handler)
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loggers.append(logger)
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error_msg = ''
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try:
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git_import.add_repo(gitloc, None, branch)
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except GitImportError as ex:
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error_msg = str(ex)
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ret = output.getvalue()
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# Remove handler hijacks
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for logger in loggers:
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logger.setLevel(logging.NOTSET)
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logger.removeHandler(import_log_handler)
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if error_msg:
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msg_header = error_msg
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color = 'red'
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else:
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msg_header = _('Added Course')
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color = 'blue'
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msg = HTML(u"<h4 style='color:{0}'>{1}</h4>").format(color, msg_header)
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msg += HTML(u"<pre>{0}</pre>").format(escape(ret))
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return msg
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def make_datatable(self):
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"""Creates course information datatable"""
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data = []
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for course in self.get_courses():
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gdir = course.id.course
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data.append([course.display_name, text_type(course.id)]
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+ self.git_info_for_course(gdir))
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return dict(header=[_('Course Name'),
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_('Directory/ID'),
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# Translators: "Git Commit" is a computer command; see http://gitref.org/basic/#commit
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_('Git Commit'),
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_('Last Change'),
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_('Last Editor')],
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title=_('Information about all courses'),
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data=data)
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def get(self, request):
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"""Displays forms and course information"""
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if not request.user.is_staff:
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raise Http404
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context = {
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'datatable': self.make_datatable(),
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'msg': self.msg,
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'djangopid': os.getpid(),
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'modeflag': {'courses': 'active-section'},
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'edx_platform_version': getattr(settings, 'EDX_PLATFORM_VERSION_STRING', ''),
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}
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return render_to_response(self.template_name, context)
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def post(self, request):
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"""Handle all actions from courses view"""
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if not request.user.is_staff:
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raise Http404
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action = request.POST.get('action', '')
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track.views.server_track(request, action, {},
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page='courses_sysdashboard')
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courses = {course.id: course for course in self.get_courses()}
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if action == 'add_course':
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gitloc = request.POST.get('repo_location', '').strip().replace(' ', '').replace(';', '')
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branch = request.POST.get('repo_branch', '').strip().replace(' ', '').replace(';', '')
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self.msg += self.get_course_from_git(gitloc, branch)
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elif action == 'del_course':
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course_id = request.POST.get('course_id', '').strip()
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course_key = CourseKey.from_string(course_id)
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course_found = False
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if course_key in courses:
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course_found = True
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course = courses[course_key]
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else:
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try:
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course = get_course_by_id(course_key)
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course_found = True
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except Exception as err: # pylint: disable=broad-except
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self.msg += _(
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HTML(u'Error - cannot get course with ID {0}<br/><pre>{1}</pre>')
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).format(
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course_key,
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escape(str(err))
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)
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if course_found:
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# delete course that is stored with mongodb backend
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self.def_ms.delete_course(course.id, request.user.id)
|
|
# don't delete user permission groups, though
|
|
self.msg += \
|
|
HTML(u"<font color='red'>{0} {1} = {2} ({3})</font>").format(
|
|
_('Deleted'), text_type(course.location), text_type(course.id), course.display_name)
|
|
|
|
context = {
|
|
'datatable': self.make_datatable(),
|
|
'msg': self.msg,
|
|
'djangopid': os.getpid(),
|
|
'modeflag': {'courses': 'active-section'},
|
|
'edx_platform_version': getattr(settings, 'EDX_PLATFORM_VERSION_STRING', ''),
|
|
}
|
|
return render_to_response(self.template_name, context)
|
|
|
|
|
|
class Staffing(SysadminDashboardView):
|
|
"""
|
|
The status view provides a view of staffing and enrollment in
|
|
courses that include an option to download the data as a csv.
|
|
"""
|
|
|
|
def get(self, request):
|
|
"""Displays course Enrollment and staffing course statistics"""
|
|
|
|
if not request.user.is_staff:
|
|
raise Http404
|
|
data = []
|
|
|
|
for course in self.get_courses():
|
|
datum = [course.display_name, course.id]
|
|
datum += [CourseEnrollment.objects.filter(
|
|
course_id=course.id).count()]
|
|
datum += [CourseStaffRole(course.id).users_with_role().count()]
|
|
datum += [','.join([x.username for x in CourseInstructorRole(
|
|
course.id).users_with_role()])]
|
|
data.append(datum)
|
|
|
|
datatable = dict(header=[_('Course Name'), _('course_id'),
|
|
_('# enrolled'), _('# staff'),
|
|
_('instructors')],
|
|
title=_('Enrollment information for all courses'),
|
|
data=data)
|
|
context = {
|
|
'datatable': datatable,
|
|
'msg': self.msg,
|
|
'djangopid': os.getpid(),
|
|
'modeflag': {'staffing': 'active-section'},
|
|
'edx_platform_version': getattr(settings, 'EDX_PLATFORM_VERSION_STRING', ''),
|
|
}
|
|
return render_to_response(self.template_name, context)
|
|
|
|
def post(self, request):
|
|
"""Handle all actions from staffing and enrollment view"""
|
|
|
|
action = request.POST.get('action', '')
|
|
track.views.server_track(request, action, {},
|
|
page='staffing_sysdashboard')
|
|
|
|
if action == 'get_staff_csv':
|
|
data = []
|
|
roles = [CourseInstructorRole, CourseStaffRole, ]
|
|
|
|
for course in self.get_courses():
|
|
for role in roles:
|
|
for user in role(course.id).users_with_role():
|
|
datum = [course.id, role, user.username, user.email,
|
|
user.profile.name.encode('utf-8')]
|
|
data.append(datum)
|
|
header = [_('course_id'),
|
|
_('role'), _('username'),
|
|
_('email'), _('full_name'), ]
|
|
return self.return_csv('staff_{0}.csv'.format(
|
|
request.META['SERVER_NAME']), header, data)
|
|
|
|
return self.get(request)
|
|
|
|
|
|
class GitLogs(TemplateView):
|
|
"""
|
|
This provides a view into the import of courses from git repositories.
|
|
It is convenient for allowing course teams to see what may be wrong with
|
|
their xml
|
|
"""
|
|
|
|
template_name = 'sysadmin_dashboard_gitlogs.html'
|
|
|
|
@method_decorator(login_required)
|
|
def get(self, request, *args, **kwargs):
|
|
"""Shows logs of imports that happened as a result of a git import"""
|
|
|
|
course_id = kwargs.get('course_id')
|
|
if course_id:
|
|
course_id = CourseKey.from_string(course_id)
|
|
|
|
page_size = 10
|
|
|
|
# Set mongodb defaults even if it isn't defined in settings
|
|
mongo_db = {
|
|
'host': 'localhost',
|
|
'user': '',
|
|
'password': '',
|
|
'db': 'xlog',
|
|
}
|
|
|
|
# Allow overrides
|
|
if hasattr(settings, 'MONGODB_LOG'):
|
|
for config_item in ['host', 'user', 'password', 'db', ]:
|
|
mongo_db[config_item] = settings.MONGODB_LOG.get(
|
|
config_item, mongo_db[config_item])
|
|
|
|
mongouri = 'mongodb://{user}:{password}@{host}/{db}'.format(**mongo_db)
|
|
|
|
error_msg = ''
|
|
|
|
try:
|
|
if mongo_db['user'] and mongo_db['password']:
|
|
mdb = mongoengine.connect(mongo_db['db'], host=mongouri)
|
|
else:
|
|
mdb = mongoengine.connect(mongo_db['db'], host=mongo_db['host'])
|
|
except mongoengine.connection.ConnectionError:
|
|
log.exception('Unable to connect to mongodb to save log, '
|
|
'please check MONGODB_LOG settings.')
|
|
|
|
if course_id is None:
|
|
# Require staff if not going to specific course
|
|
if not request.user.is_staff:
|
|
raise Http404
|
|
cilset = CourseImportLog.objects.order_by('-created')
|
|
else:
|
|
# Allow only course team, instructors, and staff
|
|
if not (request.user.is_staff or
|
|
CourseInstructorRole(course_id).has_user(request.user) or
|
|
CourseStaffRole(course_id).has_user(request.user)):
|
|
raise Http404
|
|
log.debug('course_id=%s', course_id)
|
|
cilset = CourseImportLog.objects.filter(
|
|
course_id=course_id
|
|
).order_by('-created')
|
|
log.debug(u'cilset length=%s', len(cilset))
|
|
|
|
# Paginate the query set
|
|
paginator = Paginator(cilset, page_size)
|
|
try:
|
|
logs = paginator.page(request.GET.get('page'))
|
|
except PageNotAnInteger:
|
|
logs = paginator.page(1)
|
|
except EmptyPage:
|
|
# If the page is too high or low
|
|
given_page = int(request.GET.get('page'))
|
|
page = min(max(1, given_page), paginator.num_pages)
|
|
logs = paginator.page(page)
|
|
|
|
mdb.disconnect()
|
|
context = {
|
|
'logs': logs,
|
|
'course_id': text_type(course_id) if course_id else None,
|
|
'error_msg': error_msg,
|
|
'page_size': page_size
|
|
}
|
|
|
|
return render_to_response(self.template_name, context)
|