Harvard-CS50-Web-Programming

Harvard Course on Web Programming with Python and JavaScript, with the professor Brian Yu.

Lecture 0: HTML and CSS

• HTML basic structure (html, head, body)
• Headers, paragraphs, ordered and unordered lists, links
• Tables and Images
• Inline style
• Style with CSS files
• CSS selectors and priority
• Responsive applications with flexboxes and grids
• Declaring variables with Syntactically Awesome Style Sheets (SASS)
• Using bootstrap
• Forms

Lecture 1: Git

• Creating a Git repository
• git cone, git add -m, git commit, git status, git add -am and git push commands
• Merge conflicts
• git pull, git reset --hard, git log
• Branching with git branch, git checkout -b, git merge
• GitHub features: Forking and Github Pages

Lecture 2: Python

• Types of variables
• Data structures: lists, dicts, sets and tuples
• Loops, functions and modules
• Decorators and lambda
• Exceptions

Lecture 3: Django

• Getting started: django-admin startproject and python manage.py startapp
• Basic setups: adding the new application to the INSTALLED_APPS, including to the url file
• Variables on the url patterns, rendering HTML files
• Variables in the HTML file
• Layouts and static files
• Dynamically linking urls and files
• Conditions and loops inside the HTML templates

Lecture 4: Models and Migrations

• Models: definition and usage
• Creating models for users based on the AbstractUser class
• Authentication and registration
• Applying migrations
• CharField, IntegerField and BooleanField attributes
• Relating models with ForeignKey and ManyToManyField

Lecture 5: JavaScript

• Manipulating the DOM with document.querySelector function
• Event listeners, waiting for the page to load
• Arrow functions
• Changing the innerHTML, className and style of the elements
• Datasets, onclick and onsubmit properties
• JSON and APIs with GET, POST and PUT methods

Lecture 06: User Interfaces

• Manipulating the URL with JavaScript
• Animations with CSS
• Infinite scroll
• Changing the animations with JavaScript
• Introduction to React and declarative programming
• Manipulating databases without having to reload the page

Lecture 07: Testing, Continuous Integration and Continuous Delivery

• Running tests with shell files
• Asserts
• Unit testing
• Importing TestCase in the Django tests fil
• Client request, using selenium
• GitHub Actions, YAML
• Docker, Dockerfiles

Lecture 08: Scalability and Security

• Vertical and Horizontal scaling

• Load Balancing methods:

  • Random choice
  • Round Robin
  • Fewest connections

• Sessions:

  • Sticky sessions
  • Database sessions
  • Client-side sessions

• Scaling databases: vertical and horizontal scaling

• Replication:

  • Single-primary
  • Multi-primary

• Caching

• Security on Git and GitHub

• Phishing attacks

• Cryptography:

  • Secret-key cryptography
  • Public-key cryptography

• Forgot your password feature and its problems

• API keys, rate limiting and route authentication

• Cross-site scripting and cross-site request forgery

• Other server-side and client-side frameworks

• Hosting services