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Trying to understand OAuth

Here’s my basic understanding of how to do client-side OAuth, meaning we want JavaScript running in the browser to be able to authenticate to a service (e.g., GitHub) and then access that service directly from the browser. The key security requirement is that the client-side JavaScript can’t know the client secret because the whole point of secrets as that they be secret. Assume in what follows that our web server is running on example.com. Also note that all these requests should be over HTTPS.

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import Database from 'better-sqlite3';
import { argv } from 'process';
import fs from 'fs';

/*
 * The kind of queries we support.
 */
const kinds = {
  // Execute SQL, returns { changes, lastInsertRowId } object.
  run: () => (stmt) => (...args) => stmt.run(...args),

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#!/usr/bin/env python

"""
Find times to hold the CSA Zoom meeting based on when people said they could do it.
Given a number N, find the N times that maximize the number of people who can come.
"""

from datetime import datetime
from functools import reduce
import json

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// Some utility functions

const distance = (a, b) => Math.abs(a - b);

const distance2d = (p1, p2) => Math.hypot(p1.x - p2.x, p1.y - p2.y);

const clamp = (n, min, max) => (n < min ? min : n > max ? max : n);

const nextPos = (b) => ({ x: b.x + b.dx, y: b.y + b.dy });

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/*
 * A number is prime if it is not divisible by any number other than 1 and
 * itself. 1 is not prime. Thus you can test whether a number greater than 1 is
 * prime by checking whether it is divisible by any smaller number greater than
 * one.
 */

public class Primes {

  public boolean isPrime(int n) {

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import java.util.Scanner;

public class TicTacToe {

  public static void printBoard(int board) {
    System.out.print("\033[2J\033[0;0H");
    int pieces = board >> 4;
    for (int i = 0; i < 9; i++) {
      System.out.print(" " + (i + "XO").charAt((pieces >> i & 1 | pieces >> i + 8 & 2) & 3) + " ");
      if (i % 3 < 2) {

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import java.util.Scanner;

/**
 * Make a chatbot. See [1] for some background on chatbots. But write your code
 * here in a Codespace, not in Replit.
 *
 * [1] https://runestone.academy/ns/books/published/BHSawesome/Unit3-If-Statements/magpieindex.html
 */
public class Chatbot {

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import java.util.Scanner;

public class Change0 {

  public static void main(String[] args) {
    Scanner input = new Scanner(System.in);

    System.out.print("Item 1 price: ");
    double price1 = input.nextDouble();

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import java.nio.charset.StandardCharsets;

public class Xor {

  // This is the cipher text, encoded as a hex string. If you translate every two
  // characters of this string into a byte you will have an array of bytes which
  // can be decoded by xor'ing the bytes with bits from the key, taking first the 8
  // least significant bits of the key for the 0th byte, the the next 8, and so on,
  // looping back around to the least significant bits every four bytes.
  private static final String CIPHERTEXT =

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CTE Standards, summarize by GPT-4

C1.0 Systems Development Process

• C1.1 Life Cycle Phases

• C1.2 Development Models

• C1.3 Specifications, Requirements