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Separate micro services

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Swapnil 2024-01-24 16:59:35 +05:30
parent 754cc950b9
commit 089583960b
Signed by: swapnil
GPG Key ID: 58029C48BB100574
11 changed files with 272 additions and 3 deletions
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11
app/Dockerfile Normal file
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FROM python:3.8-slim-buster
WORKDIR /app
ADD . /app
RUN pip install --no-cache-dir -r requirements.txt
EXPOSE 5000
CMD ["python", "main.py"]

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app/main.py Normal file
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import os
from flask import Flask, render_template, request, redirect, abort
import requests
def get_env_variable(var_name):
value = os.environ.get(var_name)
if not value:
raise ValueError(f"Missing required environment variable: {var_name}")
return value
app = Flask(__name__)
# Read environment variables outside the route function
client_id = get_env_variable('CLIENT_ID')
redirect_uri = get_env_variable('REDIRECT_URI')
optional_scopes = get_env_variable('OPTIONAL_SCOPES')
database_url = get_env_variable('DATABASE_URL')
csrf_protection_string = None
@app.route('/')
def home():
if is_logged_in():
return render_template('success.html')
# Generate a CSRF protection string
global csrf_protection_string
csrf_protection_string = os.urandom(16).hex()
# Pass dynamic variables to the template
return render_template('index.html', client_id=client_id, redirect_uri=redirect_uri,
optional_scopes=optional_scopes, csrf_protection_string=csrf_protection_string)
@app.route('/oauth-redirect')
def oauth_redirect():
auth_code = request.args.get('code')
csrf_token = request.args.get('state')
# Verify the CSRF protection string
if csrf_token != csrf_protection_string:
abort(400, 'Invalid CSRF token. Please try again.')
# Exchange authorization code for access and refresh tokens
response = requests.post(
'https://www.inoreader.com/oauth2/token',
headers={
'Content-Type': 'application/x-www-form-urlencoded',
'User-agent': 'your-user-agent'
},
data={
'code': auth_code,
'redirect_uri': get_env_variable('REDIRECT_URI'),
'client_id': get_env_variable('CLIENT_ID'),
'client_secret': get_env_variable('CLIENT_SECRET'),
'scope': '',
'grant_type': 'authorization_code'
}
)
response.raise_for_status()
tokens = response.json()
# Save tokens for later use
save_tokens(tokens['access_token'], tokens['refresh_token'], tokens['expires_in'])
return redirect('/')
def is_logged_in():
response = requests.get(f'{database_url}/token/latest')
response.raise_for_status()
if response.status_code == 204:
return False
elif response.status_code == 200:
resp_json = response.json()
return resp_json['token']['expiration_seconds'] + resp_json['token']['timestamp'] > datetime.now().timestamp()
return False
def save_tokens(access_token, refresh_token, expiration_seconds):
response = requests.post(
f'{database_url}/token',
headers={
'Content-Type': 'application/json'
},
json={
'access_token': access_token,
'refresh_token': refresh_token,
'expiration_seconds': expiration_seconds
}
)
response.raise_for_status()
if __name__ == '__main__':
app.run(debug=True, port=5000)

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app/requirements.txt Normal file
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Flask==3.0.1
requests==2.31.0

25
app/templates/index.html Normal file
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Simple Frontend</title>
</head>
<body>
<button onclick="redirectToOAuth()">Click Me</button>
<script>
function redirectToOAuth() {
// Encode URL components using Jinja filters
var encodedRedirectUri = encodeURIComponent('{{ redirect_uri }}');
var encodedOptionalScopes = encodeURIComponent('{{ optional_scopes }}');
// Construct the URL using Jinja variables
var oauthUrl = `https://www.inoreader.com/oauth2/auth?client_id={{ client_id }}&redirect_uri=${encodedRedirectUri}&response_type=code&scope=${encodedOptionalScopes}&state={{ csrf_protection_string }}`;
// Redirect to the constructed URL
window.location.href = oauthUrl;
}
</script>
</body>
</html>

11
app/templates/success.html Normal file
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Simple Frontend</title>
</head>
<body>
<h1>Logged In!</h1>
</body>
</html>

11
database/Dockerfile Normal file
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FROM python:3.8-slim-buster
WORKDIR /app
ADD . /app
RUN pip install --no-cache-dir -r requirements.txt
EXPOSE 5000
CMD ["python", "main.py"]

54
database/main.py Normal file
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from flask import Flask, jsonify, request
from flask_sqlalchemy import SQLAlchemy
from datetime import datetime
app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///tokens.db' # Use SQLite for simplicity
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
db = SQLAlchemy(app)
class Token(db.Model):
id = db.Column(db.Integer, primary_key=True)
access_token = db.Column(db.String(255), nullable=False)
refresh_token = db.Column(db.String(255), nullable=False)
expiration_seconds = db.Column(db.Integer, nullable=False)
timestamp = db.Column(db.DateTime, default=datetime.utcnow)
def __repr__(self):
return f'<Token {self.id}>'
# Initialize the database
db.create_all()
# API to create a new token entry
@app.route('/token', methods=['POST'])
def create_token():
data = request.get_json()
access_token = data.get('access_token')
refresh_token = data.get('refresh_token')
expiration_seconds = data.get('expiration_seconds')
new_token = Token(access_token=access_token, refresh_token=refresh_token, expiration_seconds=expiration_seconds)
db.session.add(new_token)
db.session.commit()
return ('', 204)
# API to get the latest token entry
@app.route('/token/latest', methods=['GET'])
def get_latest_token():
latest_token = Token.query.order_by(Token.timestamp.desc()).first()
if latest_token:
token_info = {
'access_token': latest_token.access_token,
'refresh_token': latest_token.refresh_token,
'expiration_seconds': latest_token.expiration_seconds,
'timestamp': latest_token.timestamp.isoformat()
}
return jsonify({'token': token_info}), 200
else:
return '', 204
if __name__ == '__main__':
app.run(host='0.0.0.0', port=5000, debug=True)

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database/requirements.txt Normal file
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Flask==3.0.1
Flask-SQLAlchemy==3.1.1

2
Dockerfile → job/Dockerfile
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@ -6,6 +6,4 @@ ADD . /app
RUN pip install --no-cache-dir -r requirements.txt
EXPOSE 80
CMD ["python", "main.py"]

63
main.py → job/main.py
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@ -6,6 +6,8 @@ import logging
DATA_STORE_PATH = "/data/last_update_time.txt"
DATABASE_URL = os.getenv("DATABASE_URL")
logging.basicConfig(level=logging.INFO)
class APIHandler:
@ -35,7 +37,7 @@ def get_new_annotations(last_annotation_time):
inoreader = APIHandler(
"https://www.inoreader.com/reader/api/0/stream/contents",
headers = {
'Authorization': 'Bearer ' + os.getenv("INOREADER_ACCESS_TOKEN")
'Authorization': 'Bearer ' + get_inoreader_access_token()
}
)
@ -99,6 +101,65 @@ def push_annotations_to_readwise(annotations):
}
)
def get_inoreader_access_token():
response = requests.get(f'{DATABASE_URL}/token/latest')
response.raise_for_status()
if response.status_code == 204:
# throw error - not logged in. Please log in first through the web app
raise Exception("Not logged in. Please log in first through the web app")
elif response.status_code == 200:
resp_json = response.json()
if resp_json['token']['expiration_seconds'] + resp_json['token']['timestamp'] > datetime.now().timestamp():
return resp_json['token']['access_token']
else:
return refresh_inoreader_access_token(resp_json['token']['refresh_token'])
access_token = get_token_from_database()
if not access_token:
access_token = refresh_inoreader_access_token()
if not access_token:
raise Exception("Unable to get access token. Try logging in again through the web app")
return access_token
def refresh_inoreader_access_token(refresh_token):
response = requests.post(
'https://www.inoreader.com/oauth2/token',
headers={
'Content-Type': 'application/x-www-form-urlencoded',
},
data={
'refresh_token': refresh_token,
'client_id': os.getenv("INOREADER_CLIENT_ID"),
'client_secret': os.getenv("INOREADER_CLIENT_SECRET"),
'grant_type': 'refresh_token'
}
)
response.raise_for_status()
tokens = response.json()
# Save tokens for later use
save_tokens(tokens['access_token'], tokens['refresh_token'], tokens['expires_in'])
return tokens['access_token']
def save_tokens(access_token, refresh_token, expiration_seconds):
response = requests.post(
f'{DATABASE_URL}/token',
headers={
'Content-Type': 'application/json'
},
json={
'access_token': access_token,
'refresh_token': refresh_token,
'expiration_seconds': expiration_seconds
}
)
response.raise_for_status()
def main():
while True:

0
requirements.txt → job/requirements.txt
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