inoreader2readwise/app/main.py

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import os
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from flask import Flask, render_template, request, redirect, abort, url_for, session
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import requests
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from datetime import datetime
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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():
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resp_json = requests.get(f'{database_url}/token/latest').json()
access_token = resp_json['token']['access_token']
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# set session token id
session['token_id'] = resp_json['token']['id']
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user_info = requests.get('https://api.github.com/user', headers={
'Authorization': f'Bearer {access_token}'
}).json()
return render_template('success.html', user_info=user_info)
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# 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
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# response = requests.post(
# 'https://www.inoreader.com/oauth2/token',
# headers={
# 'Content-Type': 'application/x-www-form-urlencoded',
# },
# 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'
# }
# )
# TEST: Github OAuth - REMOVE
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response = requests.post(
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'https://github.com/login/oauth/access_token',
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headers={
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'Accept': 'application/json'
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},
data={
'code': auth_code,
'redirect_uri': get_env_variable('REDIRECT_URI'),
'client_id': get_env_variable('CLIENT_ID'),
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'client_secret': get_env_variable('CLIENT_SECRET')
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}
)
response.raise_for_status()
tokens = response.json()
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# TEST: Github OAuth - REMOVE
tokens['refresh_token'] = 'N/A'
tokens['expires_in'] = 36000
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# Save tokens for later use
save_tokens(tokens['access_token'], tokens['refresh_token'], tokens['expires_in'])
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return redirect(url_for('home'))
# logout
@app.route('/logout')
def logout():
token_id = session.get('token_id')
if not token_id:
return redirect(url_for('home'))
# remove token_id from session
session.pop('token_id', None)
response = requests.put(f'{database_url}/token/{token_id}', headers={
'Content-Type': 'application/json'
}, json={
'is_logged_in': False
})
response.raise_for_status()
return redirect(url_for('home'))
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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()
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return resp_json['token']['is_logged_in'] or False
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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__':
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app.run(host='0.0.0.0', debug=True, port=5000)