ScoDoc/app/__init__.py
2021-12-11 16:07:25 +01:00

467 lines
16 KiB
Python

# -*- coding: UTF-8 -*
# pylint: disable=invalid-name
import datetime
import os
import socket
import sys
import time
import traceback
import logging
from logging.handlers import SMTPHandler, WatchedFileHandler
from flask import current_app, g, request
from flask import Flask
from flask import abort, has_request_context, jsonify
from flask import render_template
from flask.logging import default_handler
from flask_sqlalchemy import SQLAlchemy
from flask_migrate import Migrate
from flask_login import LoginManager, current_user
from flask_mail import Mail
from flask_bootstrap import Bootstrap
from flask_moment import Moment
from flask_caching import Cache
import sqlalchemy
from app.scodoc.sco_exceptions import (
AccessDenied,
ScoGenError,
ScoValueError,
APIInvalidParams,
)
from config import DevConfig
import sco_version
db = SQLAlchemy()
migrate = Migrate(compare_type=True)
login = LoginManager()
login.login_view = "auth.login"
login.login_message = "Identifiez-vous pour accéder à cette page."
mail = Mail()
bootstrap = Bootstrap()
moment = Moment()
cache = Cache( # XXX TODO: configuration file
config={
# see https://flask-caching.readthedocs.io/en/latest/index.html#configuring-flask-caching
"CACHE_TYPE": "RedisCache",
"CACHE_DEFAULT_TIMEOUT": 0, # by default, never expire
}
)
def handle_sco_value_error(exc):
return render_template("sco_value_error.html", exc=exc), 404
def handle_access_denied(exc):
return render_template("error_access_denied.html", exc=exc), 403
def internal_server_error(e):
"""Bugs scodoc, erreurs 500"""
# note that we set the 500 status explicitly
return (
render_template(
"error_500.html",
SCOVERSION=sco_version.SCOVERSION,
date=datetime.datetime.now().isoformat(),
),
500,
)
def handle_invalid_usage(error):
response = jsonify(error.to_dict())
response.status_code = error.status_code
return response
def render_raw_html(template_filename: str, **args) -> str:
"""Load and render an HTML file _without_ using Flask
Necessary for 503 error mesage, when DB is down and Flask may be broken.
"""
template_path = os.path.join(
current_app.config["SCODOC_DIR"],
"app",
current_app.template_folder,
template_filename,
)
with open(template_path) as f:
txt = f.read().format(**args)
return txt
def postgresql_server_error(e):
"""Erreur de connection au serveur postgresql (voir notesdb.open_db_connection)"""
return render_raw_html("error_503.html", SCOVERSION=sco_version.SCOVERSION), 503
class LogRequestFormatter(logging.Formatter):
"""Ajoute URL et remote_addr for logging"""
def format(self, record):
if has_request_context():
record.url = request.url
record.remote_addr = request.remote_addr
else:
record.url = None
record.remote_addr = None
record.sco_user = current_user
if has_request_context():
record.sco_admin_mail = current_app.config["SCODOC_ADMIN_MAIL"]
else:
record.sco_admin_mail = "(pas de requête)"
return super().format(record)
class LogExceptionFormatter(logging.Formatter):
"""Formatteur pour les exceptions: ajoute détails"""
def format(self, record):
if has_request_context():
record.url = request.url
record.remote_addr = request.environ.get(
"HTTP_X_FORWARDED_FOR", request.remote_addr
)
record.http_referrer = request.referrer
record.http_method = request.method
if request.method == "GET":
record.http_params = str(request.args)
else:
# rep = reprlib.Repr() # abbrège
record.http_params = str(request.form)[:2048]
else:
record.url = None
record.remote_addr = None
record.http_referrer = None
record.http_method = None
record.http_params = None
record.sco_user = current_user
if has_request_context():
record.sco_admin_mail = current_app.config["SCODOC_ADMIN_MAIL"]
else:
record.sco_admin_mail = "(pas de requête)"
return super().format(record)
class ScoSMTPHandler(SMTPHandler):
def getSubject(self, record: logging.LogRecord) -> str:
stack_summary = traceback.extract_tb(record.exc_info[2])
frame_summary = stack_summary[-1]
subject = f"ScoExc({sco_version.SCOVERSION}): {record.exc_info[0].__name__} in {frame_summary.name} {frame_summary.filename}"
return subject
class ReverseProxied(object):
"""Adaptateur wsgi qui nous permet d'avoir toutes les URL calculées en https
sauf quand on est en dev.
La variable HTTP_X_FORWARDED_PROTO est positionnée par notre config nginx"""
def __init__(self, app):
self.app = app
def __call__(self, environ, start_response):
scheme = environ.get("HTTP_X_FORWARDED_PROTO")
if scheme:
environ["wsgi.url_scheme"] = scheme # ou forcer à https ici ?
return self.app(environ, start_response)
def create_app(config_class=DevConfig):
app = Flask(__name__, static_url_path="/ScoDoc/static", static_folder="static")
app.wsgi_app = ReverseProxied(app.wsgi_app)
app.logger.setLevel(logging.DEBUG)
app.config.from_object(config_class)
db.init_app(app)
migrate.init_app(app, db)
login.init_app(app)
mail.init_app(app)
bootstrap.init_app(app)
moment.init_app(app)
cache.init_app(app)
sco_cache.CACHE = cache
app.register_error_handler(ScoGenError, handle_sco_value_error)
app.register_error_handler(ScoValueError, handle_sco_value_error)
app.register_error_handler(AccessDenied, handle_access_denied)
app.register_error_handler(500, internal_server_error)
app.register_error_handler(503, postgresql_server_error)
app.register_error_handler(APIInvalidParams, handle_invalid_usage)
from app.auth import bp as auth_bp
app.register_blueprint(auth_bp, url_prefix="/auth")
from app.views import scodoc_bp
from app.views import scolar_bp
from app.views import notes_bp
from app.views import users_bp
from app.views import absences_bp
from app.api import bp as api_bp
# https://scodoc.fr/ScoDoc
app.register_blueprint(scodoc_bp)
# https://scodoc.fr/ScoDoc/RT/Scolarite/...
app.register_blueprint(scolar_bp, url_prefix="/ScoDoc/<scodoc_dept>/Scolarite")
# https://scodoc.fr/ScoDoc/RT/Scolarite/Notes/...
app.register_blueprint(notes_bp, url_prefix="/ScoDoc/<scodoc_dept>/Scolarite/Notes")
# https://scodoc.fr/ScoDoc/RT/Scolarite/Users/...
app.register_blueprint(users_bp, url_prefix="/ScoDoc/<scodoc_dept>/Scolarite/Users")
# https://scodoc.fr/ScoDoc/RT/Scolarite/Absences/...
app.register_blueprint(
absences_bp, url_prefix="/ScoDoc/<scodoc_dept>/Scolarite/Absences"
)
app.register_blueprint(api_bp, url_prefix="/ScoDoc/api")
scodoc_log_formatter = LogRequestFormatter(
"[%(asctime)s] %(sco_user)s@%(remote_addr)s requested %(url)s\n"
"%(levelname)s: %(message)s"
)
# les champs additionnels sont définis dans LogRequestFormatter
scodoc_exc_formatter = LogExceptionFormatter(
"[%(asctime)s] %(sco_user)s@%(remote_addr)s requested %(url)s\n"
"%(levelname)s: %(message)s\n"
"Referrer: %(http_referrer)s\n"
"Method: %(http_method)s\n"
"Params: %(http_params)s\n"
"Admin mail: %(sco_admin_mail)s\n"
)
if not app.testing:
if not app.debug:
# --- Config logs pour PRODUCTION
# On supprime le logguer par défaut qui va vers stderr et pollue les logs systemes
app.logger.removeHandler(default_handler)
# --- Mail des messages ERROR et CRITICAL
if app.config["MAIL_SERVER"]:
auth = None
if app.config["MAIL_USERNAME"] or app.config["MAIL_PASSWORD"]:
auth = (app.config["MAIL_USERNAME"], app.config["MAIL_PASSWORD"])
secure = None
if app.config["MAIL_USE_TLS"]:
secure = ()
host_name = socket.gethostname()
mail_handler = ScoSMTPHandler(
mailhost=(app.config["MAIL_SERVER"], app.config["MAIL_PORT"]),
fromaddr="no-reply@" + app.config["MAIL_SERVER"],
toaddrs=["exception@scodoc.org"],
subject="ScoDoc Exception", # unused see ScoSMTPHandler
credentials=auth,
secure=secure,
)
mail_handler.setFormatter(scodoc_exc_formatter)
mail_handler.setLevel(logging.ERROR)
app.logger.addHandler(mail_handler)
else:
# Pour logs en DEV uniquement:
default_handler.setFormatter(scodoc_log_formatter)
# Config logs pour DEV et PRODUCTION
# Configuration des logs (actifs aussi en mode development)
# usually /opt/scodoc-data/log/scodoc.log:
# rotated by logrotate
file_handler = WatchedFileHandler(
app.config["SCODOC_LOG_FILE"], encoding="utf-8"
)
file_handler.setFormatter(scodoc_log_formatter)
file_handler.setLevel(logging.INFO)
app.logger.addHandler(file_handler)
# Log pour les erreurs (exceptions) uniquement:
# usually /opt/scodoc-data/log/scodoc_exc.log
file_handler = WatchedFileHandler(
app.config["SCODOC_ERR_FILE"], encoding="utf-8"
)
file_handler.setFormatter(scodoc_exc_formatter)
file_handler.setLevel(logging.ERROR)
app.logger.addHandler(file_handler)
# app.logger.setLevel(logging.INFO)
app.logger.info(f"{sco_version.SCONAME} {sco_version.SCOVERSION} startup")
app.logger.info(
f"create_app({config_class.__name__}, {config_class.SQLALCHEMY_DATABASE_URI})"
)
# ---- INITIALISATION SPECIFIQUES A SCODOC
from app.scodoc import sco_bulletins_generator
from app.scodoc.sco_bulletins_legacy import BulletinGeneratorLegacy
from app.scodoc.sco_bulletins_standard import BulletinGeneratorStandard
from app.scodoc.sco_bulletins_ucac import BulletinGeneratorUCAC
# l'ordre est important, le premeir sera le "défaut" pour les nouveaux départements.
sco_bulletins_generator.register_bulletin_class(BulletinGeneratorStandard)
sco_bulletins_generator.register_bulletin_class(BulletinGeneratorLegacy)
sco_bulletins_generator.register_bulletin_class(BulletinGeneratorUCAC)
if app.testing or app.debug:
from app.scodoc.sco_bulletins_example import BulletinGeneratorExample
sco_bulletins_generator.register_bulletin_class(BulletinGeneratorExample)
return app
def set_sco_dept(scodoc_dept: str):
"""Set global g object to given dept and open db connection if needed"""
# Check that dept exists
try:
dept = Departement.query.filter_by(acronym=scodoc_dept).first()
except sqlalchemy.exc.OperationalError:
abort(503)
if not dept:
raise ScoValueError(f"Invalid dept: {scodoc_dept}")
g.scodoc_dept = scodoc_dept # l'acronyme
g.scodoc_dept_id = dept.id # l'id
if not hasattr(g, "db_conn"):
ndb.open_db_connection()
if not hasattr(g, "stored_get_formsemestre"):
g.stored_get_formsemestre = {}
def user_db_init():
"""Initialize the users database.
Check that basic roles and admin user exist.
"""
from app.auth.models import User, Role
current_app.logger.info("Init User's db")
# Create roles:
Role.insert_roles()
current_app.logger.info("created initial roles")
# Ensure that admin exists
admin_mail = current_app.config.get("SCODOC_ADMIN_MAIL")
if admin_mail:
admin_user_name = current_app.config["SCODOC_ADMIN_LOGIN"]
user = User.query.filter_by(user_name=admin_user_name).first()
if not user:
user = User(user_name=admin_user_name, email=admin_mail)
try:
db.session.add(user)
db.session.commit()
except:
db.session.rollback()
raise
current_app.logger.info(
"created initial admin user, login: {u.user_name}, email: {u.email}".format(
u=user
)
)
def sco_db_insert_constants():
"""Initialize Sco database: insert some constants (modalités, ...)."""
from app import models
current_app.logger.info("Init Sco db")
# Modalités:
models.FormationModalite.insert_modalites()
def initialize_scodoc_database(erase=False, create_all=False):
"""Initialize the database for unit tests
Starts from an existing database and create all necessary
SQL tables and functions.
If erase is True, _erase_ all database content.
"""
from app import models
# - ERASE (the truncation sql function has been defined above)
if erase:
truncate_database()
# - Create all tables
if create_all:
# managed by migrations, except for TESTS
db.create_all()
# - Insert initial roles and create super-admin user
user_db_init()
# - Insert some constant values (modalites, ...)
sco_db_insert_constants()
# - Flush cache
clear_scodoc_cache()
def truncate_database():
"""Erase content of all tables (including users !) from
the current database.
"""
# use a stored SQL function, see createtables.sql
try:
db.session.execute("SELECT truncate_tables('scodoc');")
db.session.commit()
except:
db.session.rollback()
raise
def clear_scodoc_cache():
"""Clear ScoDoc cache
This cache (currently Redis) is persistent between invocation
and it may be necessary to clear it during developement or tests.
"""
# attaque directement redis, court-circuite ScoDoc:
import redis
r = redis.Redis()
r.flushall()
# Also clear local caches:
sco_preferences.clear_base_preferences()
# --------- Logging
def log(msg: str, silent_test=True):
"""log a message.
If Flask app, use configured logger, else stderr.
"""
if silent_test and current_app and current_app.config["TESTING"]:
return
try:
dept = getattr(g, "scodoc_dept", "")
msg = f" ({dept}) {msg}"
except RuntimeError:
# Flask Working outside of application context.
pass
if current_app:
current_app.logger.info(msg)
else:
sys.stdout.flush()
sys.stderr.write(
"[%s] scodoc: %s\n" % (time.strftime("%a %b %d %H:%M:%S %Y"), msg)
)
sys.stderr.flush()
# Debug: log call stack
def log_call_stack():
log("Call stack:\n" + "\n".join(x.strip() for x in traceback.format_stack()[:-1]))
# Alarms by email:
def send_scodoc_alarm(subject, txt):
from app.scodoc import sco_preferences
from app import email
sender = sco_preferences.get_preference("email_from_addr")
email.send_email(subject, sender, ["exception@scodoc.org"], txt)
from app.models import Departement
from app.scodoc import notesdb as ndb, sco_preferences
from app.scodoc import sco_cache
# admin_role = Role.query.filter_by(name="SuperAdmin").first()
# if admin_role:
# admin = (
# User.query.join(UserRole)
# .filter((UserRole.user_id == User.id) & (UserRole.role_id == admin_role.id))
# .first()
# )
# else:
# click.echo(
# "Warning: user database not initialized !\n (use: flask user-db-init)"
# )
# admin = None