lnbits-legend/lnbits/__init__.py
2020-09-04 21:33:30 -03:00

116 lines
3.6 KiB
Python

import re
import importlib
import sqlite3
from flask import Flask
from flask_assets import Environment, Bundle # type: ignore
from flask_compress import Compress # type: ignore
from flask_cors import CORS # type: ignore
from flask_talisman import Talisman # type: ignore
from os import getenv
from werkzeug.middleware.proxy_fix import ProxyFix
from .core import core_app
from .helpers import ExtensionManager
from .settings import FORCE_HTTPS
from .db import open_db, open_ext_db
disabled_extensions = getenv("LNBITS_DISABLED_EXTENSIONS", "").split(",")
app = Flask(__name__)
app.wsgi_app = ProxyFix(app.wsgi_app, x_proto=1, x_host=1) # type: ignore
valid_extensions = [ext for ext in ExtensionManager(disabled=disabled_extensions).extensions if ext.is_valid]
# optimization & security
# -----------------------
Compress(app)
CORS(app)
Talisman(
app,
force_https=FORCE_HTTPS,
content_security_policy={
"default-src": [
"'self'",
"'unsafe-eval'",
"'unsafe-inline'",
"blob:",
"api.opennode.co",
]
},
)
# blueprints / extensions
# -----------------------
app.register_blueprint(core_app)
for ext in valid_extensions:
try:
ext_module = importlib.import_module(f"lnbits.extensions.{ext.code}")
app.register_blueprint(getattr(ext_module, f"{ext.code}_ext"), url_prefix=f"/{ext.code}")
except Exception:
raise ImportError(f"Please make sure that the extension `{ext.code}` follows conventions.")
# filters
# -------
app.jinja_env.globals["DEBUG"] = app.config["DEBUG"]
app.jinja_env.globals["EXTENSIONS"] = valid_extensions
app.jinja_env.globals["SITE_TITLE"] = getenv("LNBITS_SITE_TITLE", "LNbits")
# assets
# ------
assets = Environment(app)
assets.url = app.static_url_path
assets.register("base_css", Bundle("scss/base.scss", filters="pyscss", output="css/base.css"))
# commands
# --------
def migrate_databases():
"""Creates the necessary databases if they don't exist already; or migrates them."""
from .core import migrations as core_migrations
with open_db() as core_db:
try:
rows = core_db.fetchall("SELECT * FROM dbversions")
except sqlite3.OperationalError:
# migration 3 wasn't ran
core_migrations.m000_create_migrations_table(core_db)
rows = core_db.fetchall("SELECT * FROM dbversions")
current_versions = {row["db"]: row["version"] for row in rows}
matcher = re.compile(r"^m(\d\d\d)_")
def run_migration(db, migrations_module):
db_name = migrations_module.__name__.split(".")[-2]
for key, run_migration in migrations_module.__dict__.items():
if match := matcher.match(key):
version = int(match.group(1))
if version > current_versions.get(db_name, 0):
print(f"running migration {db_name}.{version}")
run_migration(db)
core_db.execute(
"INSERT OR REPLACE INTO dbversions (db, version) VALUES (?, ?)", (db_name, version)
)
run_migration(core_db, core_migrations)
for ext in valid_extensions:
try:
ext_migrations = importlib.import_module(f"lnbits.extensions.{ext.code}.migrations")
with open_ext_db(ext.code) as db:
run_migration(db, ext_migrations)
except ImportError:
raise ImportError(f"Please make sure that the extension `{ext.code}` has a migrations file.")