Django-Applications

• Logging in Django Application
• ReCaptcha Implementation in Django Application
• Django Simple Captcha

Logging in Django Applications

Create a simple django application and run it

$ django-admin startproject LoggingDemoApp
$ cd LoggingDemoApp
$ python manage.py runserver

Now you can see the admin page when you hit http://localhost:8000 url

Now create a module app inside LoggingDemoApp

$ python manage.py startapp welcome

Lets add the support of Logging Add the below code snippets in the /welcome/views.py file

import logging
import logging.handlers as handlers
import time

# Creation of logger
logger = logging.getLogger(__name__)
logger.setLevel(logging.INFO)

# Here we define our formatter
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')

# This settings rotates the log file every minute
logHandler = handlers.TimedRotatingFileHandler('debug.log', when='M', interval=1, backupCount=0)
logHandler.setLevel(logging.INFO)
logHandler.setFormatter(formatter)

# Create logger for Console
consoleHandler = logging.StreamHandler()
consoleHandler.setLevel(level=logging.INFO)
consoleHandler.setFormatter(formatter)

# Add both Console and File handers to logger
logger.addHandler(logHandler)
logger.addHandler(consoleHandler)

Now log the error, info, debug into the console or file by using the below code

logger.error("Test Logging !!")
logger.debug("Debug Log !!")
logger.info("Info Log !!")

Before running the application update the /LoggingDemoApp/urls.py and /welcome/urls.py files Now you can check the LoggingDemoApp directory for log files.

debug.log
debug.log.2020-07-10_19-12

Simple File handler - this creates the file and appends the log

fileHandler = logging.FileHandler('debug.log')

Roll the log file when it reaches size of 1MB

logHandler = handlers.RotatingFileHandler('debug.log', maxBytes=1024, backupCount=0)

Roll log file every day, other values ( S,M,H,D,W0,W1,midnight)

logHandler = handlers.TimedRotatingFileHandler('debug.log', when='midnight', interval=1)
logHandler.suffix = "%Y-%m-%d_%H-%M-%S"

ReCaptcha Implementation in Django Application

Create a simple django application and run it

$ django-admin startproject ReCaptchaDemo
$ cd ReCaptchaDemo
$ python manage.py startapp Login
$ python manage.py runserver

Create form (index.html) using bootstrap 4

$ cd ReCaptchaDemo
create new directory "templates"
create a file index.html inside templates (add the html content)

#css
$ cd ReCaptchaDemo
create a new directory "static"
create a new directory "css" inside "static"
Copy the required css files inside "css" directory

#updates in ReCaptchaDemo/settings.py file
- update the DIRS and rest of the TEMPLATES are same
TEMPLATES = [
    {
        ...
        'DIRS':
            [
                os.path.join(BASE_DIR, 'templates')
            ],
        ...
    },
]

- add the following
STATICFILES_DIRS = (
    os.path.join(BASE_DIR, 'static'),
)

- create new variable GOOGLE_RECAPTCHA_SECRET_KEY
GOOGLE_RECAPTCHA_SECRET_KEY = 'YOUR_PRIVATE_KEY'

Register for ReCaptcha and get SITE_KEY & SECRET_KEY

• Click this link to register website https://www.google.com/recaptcha/admin/create
• Enter the label "Demo Site 1"
• Select "reCAPTCHA v2" -- "I'm not a robot" tickbox
• Add "localhost" in domains
• Accept the reCAPTCHA Terms of Service
• Then submit to get SITE_KEY & SECRET_KEY

Update the keys in Django application

• Update SITE_KEY in index.html file.
• Update SECRET_KEY in ReCaptchaDemo/settings.py

Don't forget to do the changes in views.py & urls.py file.

Django Simple Captcha

Simple Captcha documentation https://django-simple-captcha.readthedocs.io/en/latest/usage.html

1. Installation
pip install  django-simple-captcha

2. Add captcha to the INSTALLED_APPS in your settings.py

3. Run python manage.py migrate

4. Add an entry to your urls.py:
urlpatterns += [
    url(r'^captcha/', include('captcha.urls')),
]