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Traditional HTTP requests flow throught the network "pipe" (TCP connection) and the pipe only allows requests to flow in 1 direction ("to" or "from") and only 1 request can be be sent through the at once (Single-plexing).

HTTP 1.1 allows browser to form 6 such TCP connections to the server. This approach was quite expensive as servers held resource descritptors which eats a lot of server memory.

HTTP2 enabled multiplexing thought the same network pipe. The pipe has different streams and each stream carriers an ID which lets client map the responses to its respective client.

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Cross-site request forgery (also known as CSRF) is a web security vulnerability that allows an attacker to induce users to perform actions that they do not intend to perform. In a successful CSRF attack, the attacker causes the victim user to carry out an action unintentionally.

For a CSRF attack to be possible, three key conditions must be in place:

1. A relevant action. There is an action within the application that the attacker has a reason to induce. This might be a privileged action (such as modifying permissions for other users) or any action on user-specific data (such as changing the user's own password).
2. Cookie-based session handling. Performing the action involves issuing one or more HTTP requests, and the application relies solely on session cookies to identify the user who has made the requests. There is no other mechanism in place for tracking sessions or validating user requests.
3. No unpredictable request parameters. The requests that perform the action do not contain an

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Callback

function loadScript(src) {
  // creates a <script> tag and append it to the page
  // this causes the script with given src to start loading and run when complete
  let script = document.createElement('script');
  script.src = src;
  document.head.append(script);
}

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Must know

Fetch vs Axios

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react-native link

Sentry

https://sentry.io/auth/login/vital-es/

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Google code review guide

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Array wrapper

drag and drop to upload

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Pattern is a reusable solution to a commonly occuring problem. A pattern is a reusable solution that can be applied to commonly occurring problems in software design. templates for how we solve problems

Types of design pattern

1. Creational pattern
2. Structural pattern
3. Behavioural pattern

Benefits

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preload

<link rel="preload" href='./style.css' >

Advantages

• The preload property enables browser to load resources tha will be required very soon in the page rendering lifecycle, before the main rendering kicks in.
• The call for resources can be prioritised.
• Store in the cache for future requests.

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Install drf

pip install djangorestframework

Create project

django-admin startproject <project name>

Initial migrations

python manage.py migrate

Run server