Summary of code snippets

1-02-networking¶

• python/ip-address/ — my-public-ip.py and my-local-ip.py (literalinclude)

  • scripts to discover one’s public and local IP addresses

1-03-layer4¶

• python/tcp/ (mentioned)

  • a hands-on demo of raw TCP client/server communication

1-04-marshaling¶

• python/tcp-awkward-api/ (mentioned)

  • illustrates the need for data encoding on top of raw TCP

1-05-http¶

• python/httpbin-client/ (mentioned)

  • uses the requests library against httpbin.org to experiment with HTTP

1-06-epilogue¶

• python/api-random/ (mentioned)

  • a simple API server that generates random numbers on demand

2-02-my-first-server¶

• python/http-servers/server1_static.py (literalinclude)

  • a minimal static-file HTTP server written with the stdlib

• python/http-servers/ — other files (mentioned)

  • hand-written variants:

    • server2_static_byhand.py,

    • server3_post_stateful.py,

    • server4_template.py

2-05-security¶

• python/cookies/ (mentioned)

  • a server that sets and reads cookies, to inspect in browser DevTools

• python/raw-websockets/ (mentioned)

  • a raw “ping-pong” WebSocket demo (server + client in Python and JS)

3-02-fastapi-basics¶

• python/random-generator/ (mentioned)

  • exercise: a FastAPI app with GET/POST endpoints for random numbers

• python/random-generator/generator.py (mentioned)

  • alternative seed endpoint using a Pydantic model

3-04-databases-1¶

• python/db-single-table/ (mentioned)

  • complete CRUD example with a single User table using SQLModel

3-04-databases-2¶

• python/db-relationships/user_posts.py (mentioned)

  • one-to-many example: one User has many Posts

• python/db-relationships/students_courses.py (mentioned)

  • many-to-many example with an association table for students/courses

3-05-templates-html¶

• python/jinja-demo.py (mentioned)

  • runnable example of Jinja2 template rendering with dictionary data

3-06-forms¶

• python/db-single-table/users.py (literalinclude)

  • the SQLModel User class used as the backend data model

• python/fastapi-forms/register.html (literalinclude)

  • an HTML form to register a user (name, email, active checkbox)

• python/fastapi-forms/hijack-forms.js (literalinclude)

  • JS snippet that intercepts form submission and sends JSON via fetch

• python/db-single-table, python/fastapi-forms (mentioned)

  • running backend and frontend on separate ports triggers CORS errors

• python/fastapi-forms/ (mentioned)

  • vite.config.js that proxies API requests to bypass CORS in dev

3-07-websockets¶

• python/fastapi-websockets/ (mentioned)

  • shared on/off toggle demo: all connected clients see state changes in real-time

• python/fastapi-websockets/app.py (literalinclude)

  • the FastAPI WebSocket endpoint definition

• python/fastapi-websockets/index.html (literalinclude)

  • the JS client that connects to the WebSocket and updates the UI