Udacity

From Wiki RB4

Courses

Content

  • SQL
  • ORM
  • python
  • Postgres
  • Json
  • Flask
  • Ninja
  • HTTP
  • REST
  • CORS
  • API design
  • cURL
  • testing
  • documentation
  • IT security
  • Postman
  • Authentication patterns
  • Auth0

Full Stack Web Developer

  • C:\Uwes\python\UdacityFullWebDeveloper

Authorization

GET https://YOUR_DOMAIN/authorize?
 audience=API_IDENTIFIER&
 scope=SCOPE&
 response_type=code&
 client_id=YOUR_CLIENT_ID&
 redirect_uri=https://YOUR_APP/callback&
 state=STATE
  • after authentification the callback URL is called with a JWT


$env:FLASK_APP = "app.py"
flask run --reload

Coffee Shop App

Solutions
Backend Installation
sudo apt install python3.8-venv
  • create directory \Uwes\python\UdacityFullWebDeveloper with sudo
sudo git clone https://github.com/udacity/FSND.git
  • cd backend
sudo apt-get install python-dev
sudo apt-get install gcc
sudo python3 -m venv venv
sudo chown -R ubuntu:ubuntu venv/
source ./venv/bin/activate
pip install wheel
deactivate venv
Running the Backend
cd /Uwes/python/UdacityFullWebDeveloper/FSND/projects/03_coffee_shop_full_stack/starter_code/backend
export FLASK_APP=api.py;
source ./venv/bin/activate
cd /src
flask run --reload --port=5321 --host=0.0.0.0
// test
http://54.212.123.129:5321/drinks
// if CTRL + C does not terminate the process
netstat -tulpen
sudo kill -9 <PID>
Implementation
  • implement /drinks in api.py w/o any access check
  • Create new API 'Coffee Shop' with ID (Audience) 'coffee-shop' by the Auth0 account (see above) and enable RBAC and select 'Add Permission to token'
  • add permissions to the API 'Coffee Shop'
    • get:drinks
    • get:drink-details
    • post:drink
    • patch:drink
    • delete:drink
  • create roles 'Barista' and 'Manager' and assign permissions for API 'Coffee Shop'
  • assign role 'Manager' to user 'uwe.heuer@eon.com' and 'Barista' to user 'uwe.heuer@gmail.com'
  • implement missing methods in /auth/auth.py


  • implement /drinks-detail in api.py with @requires_auth

login with https://uweheuer.eu.auth0.com/authorize?audience=coffee-shop&response_type=token&client_id=Po3cpRtDEzR2LPUyrkeAStpoGSQSaeax&redirect_uri=https://127.0.0.1:8080/login-results

API Apps

$env:FLASK_APP = "flaskr" // folder to look for the init file
$env:FLASK_ENV = "development" // automatically restart of server in case of changes

pip install flask_cors

// extract origin (see below)
// from 1_Requests_Starter/readme.md
cd backend
python -m venv venv
// select virtual env interpreter in VCS by Ctrl+Shift+P
// open new terminal in VCS which executes the activate script
pip install -r requirements.txt
// decommented #psycopg2-binary==2.8.2, because compilation with VC++ fails
psql.exe -h uweheuer.spdns.de -U postgres postgres
  \i setup.sql
\psql.exe -h uweheuer.spdns.de -U student -d bookshelf -f books.psql
pip install psycopg2-binary
// replace C:\Uwes\python\UdacityFullWebDeveloper\cd0037-API-Development-and-Documentation-exercises-master\1_Requests_Starter\backend\venv\Lib\site-packages\sqlalchemy\util\compat.py
// row 331 time_func = time.clock -> time_func = time.time
python -m flask run
Origin

Trivia App

cd C:\Uwes\python\UdacityFullWebDeveloper\FSND\projects\02_trivia_api\starter\backend 

python -m venv venv
.\venv\Scripts\activate
// decommented #psycopg2-binary==2.8.2, because compilation with VC++ fails
pip install -r requirements.txt
C:\Uwes\Programme\PostgreSQL\12\bin\psql.exe -h uweheuer.spdns.de -U postgres postgres
  CREATE DATABASE trivia;
  CREATE USER trivia WITH ENCRYPTED PASSWORD 'trivia';
  GRANT ALL PRIVILEGES ON DATABASE trivia TO trivia;
  CREATE DATABASE trivia_test;
  CREATE USER trivia_test WITH ENCRYPTED PASSWORD 'trivia_test';
  GRANT ALL PRIVILEGES ON DATABASE trivia_test TO trivia_test;
C:\Uwes\Programme\PostgreSQL\12\bin\psql -U trivia -h uweheuer.spdns.de -f trivia.psql trivia
C:\Uwes\Programme\PostgreSQL\12\bin\psql -U trivia_test -h uweheuer.spdns.de -f trivia.psql trivia_test
// replace in C:\Uwes\python\UdacityFullWebDeveloper\FSND\projects\02_trivia_api\starter\backend\venv\Lib\site-packages\sqlalchemy\util\compat.py row 331
#time_func = time.clock
time_func = time.time
C:\Uwes\python\UdacityFullWebDeveloper\FSND\projects\02_trivia_api\starter\frontend> npm install

// to run the app
.\venv\Scripts\activate
$env:FLASK_APP = "flaskr" // folder to look for the init file
$env:FLASK_ENV = "development" // automatically restart of server in case of changes
$env:DB_HOST = "uweheuer.spdns.de:5432"
python -m flask run
C:\Uwes\python\UdacityFullWebDeveloper\FSND\projects\02_trivia_api\starter\frontend> npm start

// to run the tests
python .\test_flaskr.py
Upload for Check
pip freeze > requirements.txt
Solutions

ToDo App

Fyyur App

  • run as prepartion (rest was already installed for lesson)
pip3 install virtualenv
npm install bootstrap@3
// creating .env file for VSC debugging
  • execute Development Setup from GitHub
  • with psql
create database fyyur;
create user fyyur with encrypted password 'fyyur';
grant all privileges on database fyyur to fyyur;
  • in C:\Uwes\python\UdacityFullWebDeveloper\FSND\projects\01_fyyur\starter_code
python -m virtualenv env
  • to run the app
C:\Uwes\python\UdacityFullWebDeveloper\FSND\projects\01_fyyur\starter_code>.\env\Scripts\activate
pip install Flask-migrate // one-time
pip3 install psycopg2 // one-time
flask db init // one-time

flask db migrate // if needed

C:\Uwes\python\UdacityFullWebDeveloper\FSND\projects\01_fyyur\starter_code>.\env\Scripts\activate
#$env:FLASK_ENV = "development" // moved to .env file
python .\app.py
http://127.0.0.1:5000/
Origin
Solutions
Running System
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