Course Introduction

# Python unittest/mock traceback and assertion examples
# (excerpt)
effect = self.side_effect
if effect is not None:
    if _is_exception(effect):
        raise effect
E   Exception: HTTP 404

/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/unittest/mock.py:1196: Exception
    TestEdgeCases.test_extreme_wind_directions

self = <test_app.TestEdgeCases object at 0x1148e3d10>

def test_extreme_wind_directions(self):
    """Test edge cases for wind direction conversion."""
    # Test boundary conditions
    assert self.decoder.get_wind_direction_text(361) == 'north'  # Should wrap around
    assert self.decoder.get_wind_direction_text(-1) == 'north-northwest'  # Negative wrapping
E   AssertionError: assert 'north' == 'north-northwest'
E    - north-northwest
E    + north

test_app.py:278: AssertionError

FAILED test_app.py::TestMETARDecoder::test_decode_weather_phenomena - AssertionError: assert 'rain, thunderstorm' == 'thunderstorm, rain'
FAILED test_app.py::TestMETARDecodingIntegration::test_decode_metar_with_weather - AssertionError: assert 'scattered clouds at 800 feet' in 'overcast at 2500 feet'
FAILED test_app.py::TestMETARDecodingIntegration::test_decode_metar_multiple_weather_phenomena - AssertionError: assert 'heavy thunderstorm, heavy rain' in 'heavy rain, heavy thunderstorm'
FAILED test_app.py::TestFetchMETAR::test_fetch_metar_network_error - Exception: Network error
FAILED test_app.py::TestFetchMETAR::test_fetch_metar_http_error - Exception: HTTP 404
FAILED test_app.py::TestEdgeCases::test_extreme_wind_directions - AssertionError: assert 'north' == 'north-northwest'

1. Run /init to create a CLAUDE.md file with instructions for Claude
2. Use Claude to help with file analysis, editing, bash commands and git
3. Be as specific as you would with another engineer for the best results
4. ✓ Run /terminal-setup to set up terminal integration

Build a single image optimization web app using Flask.

Requirements:
- Flask web UI with drag-and-drop upload
- Support JPEG/PNG/WebP only (reject SVG/GIF)
- Rate limiting (30 req/min per IP)
- Max 25MB upload size
- Auto-cleanup temp files
- Show "Before" uploaded image and placeholder "After" pane
- Use Pillow for image I/O, keep OpenCV available for future features
- Dockerized with Gunicorn for production

– config/database.js - PostgreSQL database connection pool
– routes/auth.js - Authentication routes (currently only login)
– schema.sql - Database schema definition

Route-Controller Architecture:

Routes are directly connected using Express Router patterns:
– Main server mounts auth routes at /api/auth (server.js:11)
– Auth router handles /login endpoint with inline controller logic (routes/auth.js:9-96)
– No separate controller layer - business logic is embedded in route handlers

Database:

PostgreSQL with:
– Connection via pg library with connection pooling (config/database.js:3-9)
– Single users table with id, email, name, password, timestamps (schema.sql:8-15)
– Email index for performance (schema.sql:18)
– Uses bcrypt for password hashing and JWT for authentication tokens

Write/audits/ERROR_HANDLING_COMPREHENSIVE_REVIEW.md
└ Wrote 596 lines to audits/ERROR_HANDLING_COMPREHENSIVE_REVIEW.md
# Error Handling Comprehensive Review
## Executive Summary
**Status:** ❌ ❌ **CRITICAL DEFICIENCIES IDENTIFIED**
**Overall Score:** 3.5/10

The Express Login Demo exhibits severe error handling vulnerabilities that create significant security risks and operational exposure.
The application lacks centralized error management, exposes sensitive information through verbose error messages, and has no recovery plan for failure scenarios.

## Critical Findings Overview
+586 lines (ctrl+r to expand)

* Whirpooling... (esc to interrupt)

# Search for console logs and credential-like strings
grep -r "console\.log\|console\.error" /Users/jeremy/Repos/Claude\ Code\ Course/Express-login-demo/ --include="*.js" --exclude-dir=node_modules
# Example output (abbreviated)
# /Users/jeremy/Repos/Claude Code Course/Express-login-demo/config/database.js:  console.log('Connected to PostgreSQL database');
# /Users/jeremy/Repos/Claude Code Course/Express-login-demo/config/database.js:  console.error('Database connection error:', err);
grep -r "password\|secret\|token\|key" /Users/jeremy/Repos/Claude\ Code\ Course/Express-login-demo/.env
# Example output
# /Users/jeremy/Repos/Claude Code Course/Express-login-demo/.env:JWT_SECRET=your_jwt_secret_key_here
# /Users/jeremy/Repos/Claude Code Course/Express-login-demo/.env:DB_PASSWORD=your_db_password

Write(audits/DATABASE_SECURITY_AUDIT_REPORT.md)

Opened changes in Visual Studio Code
Save file to continue...

Do you want to make this edit to DATABASE_SECURITY_AUDIT_REPORT.md?
1. Yes
2. Yes, for this session only (shift+tab)
3. No, and tell Claude what to do differently (esc)

#!/usr/bin/env python3
import os
import sys
import argparse
from pathlib import Path

class ProjectGenerator:
    def __init__(self):
        self.dist_dir = Path("dist")
        self.templates = {
            # templates mapping...
        }

    def create_dist(self):
        self.dist_dir.mkdir(parents=True, exist_ok=True)
        # additional generation logic...

mkdir -p dist
# Next: Test the generator with both project types