Due Date Changer

An LTI that allows a user to easily change due dates for multiple assignments simultaneously.

Table of Contents

• Installation
• Development Server
• Production Server
• Contributing
• Contact Us

Installation

Clone the repository

# clone via SSH
git clone git@github.com:ucfopen/due-date-changer.git

# clone via HTTPS
git clone https://github.com/ucfopen/due-date-changer.git

Switch into the new directory

cd due-date-changer

Create the config file from the template

cp config.py.template config.py

Fill in the config file

# -*- coding: utf-8 -*-

from __future__ import unicode_literals

DEBUG = False
SECRET_KEY = 'JbwLnLgsfxDInozQudc6IFPe0eYecW8f'

ALLOWED_CANVAS_DOMAINS = ['example.com', 'example.edu']

CANVAS_URL = 'https://example.instructure.com'
API_KEY = 'p@$$w0rd'

PYLTI_CONFIG = {
    'consumers': {
        'consumer_key': {
            'secret': b'shared_secret'
        }
    },
    'roles': {
        'staff': [
            'urn:lti:instrole:ims/lis/Administrator',
            'Instructor',
            'ContentDeveloper',
            'urn:lti:role:ims/lis/TeachingAssistant'
        ]
    }
}

TIME_ZONE = 'US/Eastern'
LOCAL_TIME_FORMAT = '%m/%d/%Y %I:%M %p'

LOG_FILE = 'due_date_changer.log'
LOG_FORMAT = '%(asctime)s [%(levelname)s] {%(filename)s:%(lineno)d} %(message)s'
LOG_LEVEL = 'DEBUG'
LOG_MAX_BYTES = 1024 * 1024 * 5  # 5 MB
LOG_BACKUP_COUNT = 1

Create a virtual environment

virtualenv -p python2.7 env

Source the environment

source env/bin/activate

Alternatively, use the setup script

source setup.sh

Install required packages

• If you want to be able to run tests:

  pip install -r test_requirements.txt

• Otherwise,

  pip install -r requirements.txt

Development Server

If you haven't already, activate the virtual environment and set up Flask environment variables.

source env/bin/activate
export FLASK_APP=lti.py
export FLASK_DEBUG=1

Alternatively, use the setup script

source setup.sh

Run the Flask development server.

flask run --with-threads

Check the status page at /status (http://127.0.0.1:5000/status by default) to see if everything is working properly.

Note: for the status page to work, the app must be run with threading enabled.

Production Server

Due Date Changer is tested to run NGINX and uWSGI, but can also work on Apache and mod_wsgi.

NGINX

nginx.conf

In your nginx.conf file, place these lines under the server{} section with the appropriate changes

location /due_date_changer/static {
    alias /path/to/due_date_changer/static/;
}


location /due_date_changer {
    root html;
    include uwsgi_params;

    uwsgi_param                  UWSGI_SCHEME https; # Set to https is behind load balancer, else http
    uwsgi_param                  SCRIPT_NAME /due_date_changer;
    uwsgi_modifier1              30;
    uwsgi_pass                   127.0.0.1:9000;  #set to any number above 9000 that isn't in use.
    uwsgi_read_timeout           300;
    uwsgi_connect_timeout        300;
    uwsgi_send_timeout           300;
    proxy_redirect               off;
    proxy_set_header             Host $host;
    proxy_set_header             X-Real-IP $remote_addr;
    proxy_set_header             X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header             X-Forwarded-Host example.com; #Add your domain here.
}

UWSGI

/etc/uwsgi/sites-enabled/due_date_changer.ini

[uwsgi]
# uwsgi process runs as user:group
uid = nginx
gid = nginx

# Number of worker processes
processes = 6

chdir = /path/to/due_date_changer/
venv = /path/to/due_date_changer/env


socket = 127.0.0.1:9000 #Same Socket number as above

# Respawn slow processes
harakiri=60
harakiri-verbose=True

master=True

# name of wsgi file in the chdir dir above without the .py extension
wsgi-file = wsgi.py

# Background the process (and allow it to log!)
daemonize = /var/log/uwsgi/app.log

# Reload the uwsgi process if the wsgi file is touched
touch-reload = /path/to/due_date_changer/wsgi.py

#testing saveSnapshot fix
buffer-size=16384
#post-buffering=1

#stats
stats = /tmp/wsgi.py.socket

Contact Us

Need help? Have an idea? Just want to say hi? Come join us on the UCF Open Slack Channel and join the #due-date-changer channel!