OAuth (Open Authorization) is an open standard protocol for authorization that allows applications to access a user's resources without knowing their credentials (e.g., password). It is commonly used for Single Sign-On (SSO) and API access.
OAuth operates using tokens, which allow an application to access a user's data on their behalf. The typical flow is as follows:
GoJS is a JavaScript library for creating interactive diagrams and graphs in web applications. It is commonly used for flowcharts, network topologies, UML diagrams, BPMN models, and other visual representations of data.
GoJS is widely used in business applications to visualize complex processes or relationships. It is a paid library but offers a free evaluation version.
The official website is: https://gojs.net
The Pyramid Web Framework is a lightweight, flexible, and scalable web framework for Python. It is part of the Pylons Project family and is ideal for developers looking for a minimalist yet powerful solution for web applications.
Minimalistic but Extensible
Flexible
Traversal and URL Mapping
Powerful and Efficient
First-Class Testing Support
Comprehensive Documentation & Community Support
Feature | Pyramid | Flask | Django |
---|---|---|---|
Architecture | Minimalistic & modular | Minimalistic & lightweight | Monolithic & feature-rich |
Routing | URL Mapping & Traversal | URL Mapping | URL Mapping |
Scalability | High | Medium | High |
Built-in Features | Few, but extensible | Very few | Many (ORM, Admin, Auth, etc.) |
Learning Curve | Medium | Easy | Higher |
Pyramid is an excellent choice for developers looking for a balance between minimalism and power. It is particularly well-suited for medium to large web projects where scalability, flexibility, and good testability are essential.
Twig is a powerful and flexible templating engine for PHP, commonly used in Symfony but also in other PHP projects. It helps separate logic from presentation and offers many useful features for frontend development.
{{ }}
)Twig uses double curly braces to output variables:
<p>Hello, {{ name }}!</p>
→ If name = "Max"
, the output will be:
"Hello, Max!"
{% %}
)Twig supports if-else statements, loops, and other control structures.
{% if user.isAdmin %}
<p>Welcome, Admin!</p>
{% else %}
<p>Welcome, User!</p>
{% endif %}
Loops (for
)
<ul>
{% for user in users %}
<li>{{ user.name }}</li>
{% endfor %}
</ul>
Twig supports "Base Layouts", similar to Laravel's Blade.
base.html.twig
)<!DOCTYPE html>
<html>
<head>
<title>{% block title %}My Page{% endblock %}</title>
</head>
<body>
<header>{% block header %}Default Header{% endblock %}</header>
<main>{% block content %}{% endblock %}</main>
</body>
</html>
Child Template (page.html.twig
)
{% extends 'base.html.twig' %}
{% block title %}Homepage{% endblock %}
{% block content %}
<p>Welcome to my website!</p>
{% endblock %}
→ The blocks override the default content from the base template.
You can include reusable components like a navbar or footer:
{% include 'partials/navbar.html.twig' %}
Twig provides many filters to format content:
Filter | Beispiel | Ausgabe |
---|---|---|
upper |
`{{ "text" | upper }}` |
lower |
`{{ "TEXT" | lower }}` |
length |
`{{ "Hallo" | length }}` |
date |
`{{ "now" | date("d.m.Y") }}` |
Twig automatically escapes HTML to prevent XSS attacks:
{{ "<script>alert('XSS');</script>" }}
→ Outputs: <script>alert('XSS');</script>
To output raw HTML, use |raw
:
{{ "<strong>Bold</strong>"|raw }}
The Catalyst Framework is a flexible and powerful web framework for Perl. It enables the development of scalable and maintainable web applications and follows the Model-View-Controller (MVC) design pattern.
✅ MVC Architecture – Clear separation of business logic, presentation, and data management
✅ Flexibility – Supports various templating systems and ORM solutions like DBIx::Class
✅ Extensibility – Many plugins and modules available
✅ Asynchronous Capabilities – Can be integrated with event-driven architectures
✅ REST APIs & WebSockets – Support for modern web technologies
Request headers are HTTP headers sent by a client (e.g., a web browser or API request) to the server, providing additional information about the request, the client, or the desired content.
1. Host
Host: www.example.com
2. User-Agent
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64)
3. Accept
Accept: text/html, application/json
4. Accept-Language
Accept-Language: de-DE, en-US
5. Accept-Encoding
Accept-Encoding: gzip, deflate, br
6. Referer
Referer: https://www.google.com/
7. Authorization
Authorization: Basic dXNlcm5hbWU6cGFzc3dvcmQ=
8. Cookie
Cookie: sessionId=abc123; theme=dark
9. Content-Type
(for POST/PUT-Anfragen)
Content-Type: application/json
10. Origin
Origin: https://www.example.com
These headers help the server understand the request and respond accordingly by providing details about the client, preferred content, and security aspects.
General HTTP headers are headers that can be used in both HTTP requests and responses. They contain general information about the connection and data transfer that is not specific to the client, server, or content.
1. Cache-Control
Cache-Control: no-cache, no-store, must-revalidate
2. Connection
Connection: keep-alive
3. Date
Date: Wed, 31 Jan 2025 12:34:56 GMT
4. Pragma
(veraltet, aber noch genutzt)
Cache-Control
, mainly used for backward-compatible caching rules.für rückwärtskompatible Caching-Regeln genutzt.Pragma: no-cache
5. Trailer
Trailer: Expires
6. Transfer-Encoding
Transfer-Encoding: chunked
7. Upgrade
Upgrade: websocket
8. Via
Via: 1.1 proxy.example.com
These headers improve communication between the client and server, manage caching, and allow protocol upgrades.
Hot Module Replacement (HMR) is a web development technique that allows code changes to be applied instantly in a running application without requiring a full page reload. This significantly improves development productivity since the application's state (e.g., user input or UI state) is preserved.
HMR is used in modern build tools like Webpack, Vite, Parcel, or esbuild. The process works as follows:
✅ Faster development cycles – No need for full-page reloads.
✅ Preserved application state – Useful for React, Vue, and other SPA frameworks.
✅ Instant CSS updates – Style changes appear immediately.
✅ Improved DX (Developer Experience) – Reduces workflow interruptions.
If you're using Webpack, you can enable HMR like this:
if (module.hot) {
module.hot.accept('./module.js', function() {
console.log('Module updated!');
});
}
This ensures that changes to module.js
are applied without restarting the entire application.
CORS (Cross-Origin Resource Sharing) is a security mechanism implemented by web browsers to control which websites can access resources from other domains. By default, browsers block cross-origin requests—requests made from one website to another domain, protocol, or port—for security reasons.
Without CORS, malicious websites could secretly send requests to other servers (e.g., API servers or banking sites), potentially stealing or misusing sensitive data (Cross-Site Request Forgery, CSRF). CORS ensures that only explicitly allowed websites can access resources.
When a web application makes a cross-origin request (e.g., from http://example.com
to https://api.example.com
), the browser automatically sends a CORS request. The server must then respond with specific HTTP headers to indicate whether the request is allowed:
Without CORS headers:
The browser blocks the request.
With CORS headers:
The server can respond with Access-Control-Allow-Origin: *
(allowing all domains) or a specific domain (Access-Control-Allow-Origin: https://example.com
). This enables access.
For certain requests (e.g., PUT
, DELETE
, or requests with custom headers), the browser sends a preflight request using the OPTIONS
method. The server must respond with the correct CORS headers to allow the main request.
CORS is a crucial security measure that prevents unauthorized websites from accessing foreign resources. Developers must configure the correct server-side headers to allow legitimate clients to access the data.
The Iris Framework is a modern, high-performance web framework for the Go (Golang) programming language. It’s commonly used to build web applications, APIs, and microservices. Iris focuses on speed, flexibility, and ease of use, providing a variety of features to streamline development.
High Performance:
Ease of Use:
Feature-Rich:
Extensibility:
Flexible Routing:
File Server and WebSockets:
Developer-Friendly:
Iris is particularly suitable for developers looking for a fast and reliable solution to build web applications. It combines Go's speed with a developer-friendly API, saving time and effort.