💊 capsul.org cloud compute service - python flask web application
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import logging
from logging.config import dictConfig as logging_dict_config
import atexit
import os
import hashlib
import requests
import sys
import stripe
from dotenv import load_dotenv, find_dotenv
from flask import Flask
from flask_mail import Mail, Message
from flask import render_template
from flask import url_for
from flask import current_app
from flask import flash
from flask import session
from apscheduler.schedulers.background import BackgroundScheduler
from capsulflask.shared import my_exec_info_message
from capsulflask import hub_model, spoke_model, cli
from capsulflask.payment import try_reconnnect_btcpay
from capsulflask.http_client import MyHTTPClient
class StdoutMockFlaskMail:
def send(self, message: Message):
current_app.logger.info(f"Email would have been sent if configured:\n\nto: {','.join(message.recipients)}\nsubject: {message.subject}\nbody:\n\n{message.body}\n\n")
load_dotenv(find_dotenv())
app = Flask(__name__)
app.config.from_mapping(
BASE_URL=os.environ.get("BASE_URL", default="http://localhost:5000"),
SECRET_KEY=os.environ.get("SECRET_KEY", default="dev"),
HUB_MODE_ENABLED=os.environ.get("HUB_MODE_ENABLED", default="True").lower() in ['true', '1', 't', 'y', 'yes'],
SPOKE_MODE_ENABLED=os.environ.get("SPOKE_MODE_ENABLED", default="True").lower() in ['true', '1', 't', 'y', 'yes'],
INTERNAL_HTTP_TIMEOUT_SECONDS=os.environ.get("INTERNAL_HTTP_TIMEOUT_SECONDS", default="300"),
HUB_MODEL=os.environ.get("HUB_MODEL", default="capsul-flask"),
SPOKE_MODEL=os.environ.get("SPOKE_MODEL", default="mock"),
LOG_LEVEL=os.environ.get("LOG_LEVEL", default="INFO"),
SPOKE_HOST_ID=os.environ.get("SPOKE_HOST_ID", default="baikal"),
SPOKE_HOST_TOKEN=os.environ.get("SPOKE_HOST_TOKEN", default="changeme"),
HUB_TOKEN=os.environ.get("HUB_TOKEN", default="changeme"),
LIBVIRT_DNSMASQ_PATH=os.environ.get("LIBVIRT_DNSMASQ_PATH", default="/var/lib/libvirt/dnsmasq").rstrip("/"),
# https://www.postgresql.org/docs/9.1/libpq-ssl.html#LIBPQ-SSL-SSLMODE-STATEMENTS
# https://stackoverflow.com/questions/56332906/where-to-put-ssl-certificates-when-trying-to-connect-to-a-remote-database-using
# TLS example: sslmode=verify-full sslrootcert=letsencrypt-root-ca.crt host=db.example.com port=5432 user=postgres password=dev dbname=postgres
POSTGRES_CONNECTION_PARAMETERS=os.environ.get(
"POSTGRES_CONNECTION_PARAMETERS",
default="host=localhost port=5432 user=postgres password=dev dbname=postgres"
),
DATABASE_SCHEMA=os.environ.get("DATABASE_SCHEMA", default="public"),
MAIL_SERVER=os.environ.get("MAIL_SERVER", default=""),
MAIL_PORT=os.environ.get("MAIL_PORT", default="465"),
MAIL_USE_TLS=os.environ.get("MAIL_USE_TLS", default="False").lower() in ['true', '1', 't', 'y', 'yes'],
MAIL_USE_SSL=os.environ.get("MAIL_USE_SSL", default="True").lower() in ['true', '1', 't', 'y', 'yes'],
MAIL_USERNAME=os.environ.get("MAIL_USERNAME", default=""),
MAIL_PASSWORD=os.environ.get("MAIL_PASSWORD", default=""),
MAIL_DEFAULT_SENDER=os.environ.get("MAIL_DEFAULT_SENDER", default="no-reply@capsul.org"),
ADMIN_EMAIL_ADDRESSES=os.environ.get("ADMIN_EMAIL_ADDRESSES", default="ops@cyberia.club"),
ADMIN_PANEL_ALLOW_EMAIL_ADDRESSES=os.environ.get("ADMIN_PANEL_ALLOW_EMAIL_ADDRESSES", default="forest.n.johnson@gmail.com,capsul@cyberia.club"),
PROMETHEUS_URL=os.environ.get("PROMETHEUS_URL", default="https://prometheus.cyberia.club"),
STRIPE_API_VERSION=os.environ.get("STRIPE_API_VERSION", default="2020-03-02"),
STRIPE_SECRET_KEY=os.environ.get("STRIPE_SECRET_KEY", default=""),
STRIPE_PUBLISHABLE_KEY=os.environ.get("STRIPE_PUBLISHABLE_KEY", default=""),
#STRIPE_WEBHOOK_SECRET=os.environ.get("STRIPE_WEBHOOK_SECRET", default="")
BTCPAY_PRIVATE_KEY=os.environ.get("BTCPAY_PRIVATE_KEY", default="").replace("\\n", "\n"),
BTCPAY_URL=os.environ.get("BTCPAY_URL", default="")
)
app.config['HUB_URL'] = os.environ.get("HUB_URL", default=app.config['BASE_URL'])
class SetLogLevelToDebugForHeartbeatRelatedMessagesFilter(logging.Filter):
def isHeartbeatRelatedString(self, thing):
# thing_string = "<error>"
is_in_string = False
try:
thing_string = "%s" % thing
is_in_string = 'heartbeat-task' in thing_string or 'hub/heartbeat' in thing_string or 'spoke/heartbeat' in thing_string
except:
pass
# self.warning("isHeartbeatRelatedString(%s): %s", thing_string, is_in_string )
return is_in_string
def filter(self, record):
if app.config['LOG_LEVEL'] == "DEBUG":
return True
if self.isHeartbeatRelatedString(record.msg):
return False
for arg in record.args:
if self.isHeartbeatRelatedString(arg):
return False
return True
logging_dict_config({
'version': 1,
'formatters': {'default': {
'format': '[%(asctime)s] %(levelname)s in %(module)s: %(message)s',
}},
'filters': {
'setLogLevelToDebugForHeartbeatRelatedMessages': {
'()': SetLogLevelToDebugForHeartbeatRelatedMessagesFilter,
}
},
'handlers': {'wsgi': {
'class': 'logging.StreamHandler',
'stream': 'ext://flask.logging.wsgi_errors_stream',
'formatter': 'default',
'filters': ['setLogLevelToDebugForHeartbeatRelatedMessages']
}},
'root': {
'level': app.config['LOG_LEVEL'],
'handlers': ['wsgi']
}
})
# app.logger.critical("critical")
# app.logger.error("error")
# app.logger.warning("warning")
# app.logger.info("info")
# app.logger.debug("debug")
stripe.api_key = app.config['STRIPE_SECRET_KEY']
stripe.api_version = app.config['STRIPE_API_VERSION']
if app.config['MAIL_SERVER'] != "":
app.config['FLASK_MAIL_INSTANCE'] = Mail(app)
else:
app.logger.warn("No MAIL_SERVER configured. capsul will simply print emails to stdout.")
app.config['FLASK_MAIL_INSTANCE'] = StdoutMockFlaskMail()
app.config['HTTP_CLIENT'] = MyHTTPClient(timeout_seconds=int(app.config['INTERNAL_HTTP_TIMEOUT_SECONDS']))
if app.config['BTCPAY_URL'] != "":
try_reconnnect_btcpay(app)
# only start the scheduler and attempt to migrate the database if we are running the app.
# otherwise we are running a CLI command.
command_line = ' '.join(sys.argv)
is_running_server = ('flask run' in command_line) or ('gunicorn' in command_line)
app.logger.info(f"is_running_server: {is_running_server}")
if app.config['HUB_MODE_ENABLED']:
if app.config['HUB_MODEL'] == "capsul-flask":
app.config['HUB_MODEL'] = hub_model.CapsulFlaskHub()
# debug mode (flask reloader) runs two copies of the app. When running in debug mode,
# we only want to start the scheduler one time.
if is_running_server and (not app.debug or os.environ.get('WERKZEUG_RUN_MAIN') == 'true'):
scheduler = BackgroundScheduler()
heartbeat_task_url = f"{app.config['HUB_URL']}/hub/heartbeat-task"
heartbeat_task_headers = {'Authorization': f"Bearer {app.config['HUB_TOKEN']}"}
heartbeat_task = lambda: requests.post(heartbeat_task_url, headers=heartbeat_task_headers)
scheduler.add_job(name="heartbeat-task", func=heartbeat_task, trigger="interval", seconds=5)
scheduler.start()
atexit.register(lambda: scheduler.shutdown())
else:
app.config['HUB_MODEL'] = hub_model.MockHub()
from capsulflask import db
db.init_app(app, is_running_server)
from capsulflask import auth, landing, console, payment, metrics, cli, hub_api, admin
app.register_blueprint(landing.bp)
app.register_blueprint(auth.bp)
app.register_blueprint(console.bp)
app.register_blueprint(payment.bp)
app.register_blueprint(metrics.bp)
app.register_blueprint(cli.bp)
app.register_blueprint(hub_api.bp)
app.register_blueprint(admin.bp)
app.add_url_rule("/", endpoint="index")
if app.config['SPOKE_MODE_ENABLED']:
if app.config['SPOKE_MODEL'] == "shell-scripts":
app.config['SPOKE_MODEL'] = spoke_model.ShellScriptSpoke()
else:
app.config['SPOKE_MODEL'] = spoke_model.MockSpoke()
from capsulflask import spoke_api
app.register_blueprint(spoke_api.bp)
@app.after_request
def security_headers(response):
response.headers['X-Frame-Options'] = 'SAMEORIGIN'
if 'Content-Security-Policy' not in response.headers:
response.headers['Content-Security-Policy'] = "default-src 'self'"
response.headers['X-Content-Type-Options'] = 'nosniff'
if current_app.config['BROADCAST_BANNER_MESSAGE'] is not None and current_app.config['BROADCAST_BANNER_MESSAGE'] != "":
for t in session.get("_flashes", []):
if t is not None and t[1] == current_app.config['BROADCAST_BANNER_MESSAGE']:
return response
flash(current_app.config['BROADCAST_BANNER_MESSAGE'])
return response
@app.context_processor
def override_url_for():
"""
override the url_for function built into flask
with our own custom implementation that busts the cache correctly when files change
"""
return dict(url_for=url_for_with_cache_bust)
def url_for_with_cache_bust(endpoint, **values):
"""
Add a query parameter based on the hash of the file, this acts as a cache bust
"""
if endpoint == 'static':
filename = values.get('filename', None)
if filename:
if 'STATIC_FILE_HASH_CACHE' not in current_app.config:
current_app.config['STATIC_FILE_HASH_CACHE'] = dict()
if filename not in current_app.config['STATIC_FILE_HASH_CACHE']:
filepath = os.path.join(current_app.root_path, endpoint, filename)
#print(filepath)
if os.path.isfile(filepath) and os.access(filepath, os.R_OK):
with open(filepath, 'rb') as file:
hasher = hashlib.md5()
hasher.update(file.read())
current_app.config['STATIC_FILE_HASH_CACHE'][filename] = hasher.hexdigest()[-6:]
values['q'] = current_app.config['STATIC_FILE_HASH_CACHE'][filename]
return url_for(endpoint, **values)