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""" |
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byceps.application |
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~~~~~~~~~~~~~~~~~~ |
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:Copyright: 2006-2019 Jochen Kupperschmidt |
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:License: Modified BSD, see LICENSE for details. |
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""" |
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from importlib import import_module |
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from pathlib import Path |
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from typing import Any, Dict, Iterator, Optional, Tuple, Union |
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from flask import Flask, redirect |
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import jinja2 |
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from .blueprints.snippet.init import add_routes_for_snippets |
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from . import config, config_defaults |
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from .database import db |
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from . import email |
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from .redis import redis |
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from .util.framework.blueprint import register_blueprint |
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from .util.l10n import set_locale |
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from .util import templatefilters |
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from .util.templating import SiteTemplateOverridesLoader |
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BlueprintReg = Tuple[str, Optional[str]] |
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def create_app(config_filename: Union[Path, str], config_overrides: Optional[Dict[str, Any]]=None) -> Flask: |
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"""Create the actual Flask application.""" |
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app = Flask(__name__) |
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app.config.from_object(config_defaults) |
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app.config.from_pyfile(str(config_filename)) |
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if config_overrides is not None: |
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app.config.from_mapping(config_overrides) |
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# Throw an exception when an undefined name is referenced in a template. |
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app.jinja_env.undefined = jinja2.StrictUndefined |
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# Set the locale. |
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set_locale(app.config['LOCALE']) # Fail if not configured. |
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# Initialize database. |
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db.init_app(app) |
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# Initialize Redis connection. |
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redis.init_app(app) |
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email.init_app(app) |
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config.init_app(app) |
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_register_blueprints(app) |
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templatefilters.register(app) |
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_add_static_file_url_rules(app) |
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return app |
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def _register_blueprints(app: Flask) -> None: |
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"""Register blueprints depending on the configuration.""" |
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for name, url_prefix in _get_blueprints(app): |
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register_blueprint(app, name, url_prefix) |
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def _get_blueprints(app: Flask) -> Iterator[BlueprintReg]: |
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"""Yield blueprints to register on the application.""" |
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yield from _get_blueprints_common() |
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current_mode = config.get_site_mode(app) |
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if current_mode.is_public(): |
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yield from _get_blueprints_site() |
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elif current_mode.is_admin(): |
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yield from _get_blueprints_admin() |
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yield from _get_blueprints_api() |
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yield from _get_blueprints_health() |
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if app.config['METRICS_ENABLED']: |
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yield from _get_blueprints_metrics() |
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if app.debug: |
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yield from _get_blueprints_debug() |
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def _get_blueprints_common() -> Iterator[BlueprintReg]: |
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yield from [ |
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('authentication', '/authentication' ), |
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('authorization', None ), |
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('core', '/core' ), |
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('user', None ), |
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('user.avatar', '/users' ), |
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('user.creation', '/users' ), |
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('user.current', '/users' ), |
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('user.email_address', '/users/email_address' ), |
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] |
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def _get_blueprints_site() -> Iterator[BlueprintReg]: |
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yield from [ |
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('attendance', '/attendance' ), |
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('board', '/board' ), |
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('consent', '/consent' ), |
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('news', '/news' ), |
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('newsletter', '/newsletter' ), |
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('orga_team', '/orgas' ), |
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('party', None ), |
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('seating', '/seating' ), |
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('shop.order', '/shop' ), |
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('shop.orders', '/shop/orders' ), |
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('snippet', '/snippets' ), |
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('terms', '/terms' ), |
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('ticketing', '/tickets' ), |
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('user.profile', '/users' ), |
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('user_badge', '/user_badges' ), |
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('user_group', '/user_groups' ), |
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('user_message', '/user_messages' ), |
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] |
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def _get_blueprints_admin() -> Iterator[BlueprintReg]: |
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yield from [ |
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('admin.attendance', '/admin/attendance' ), |
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('admin.authorization', '/admin/authorization' ), |
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('admin.board', '/admin/board' ), |
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('admin.brand', '/admin/brands' ), |
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('admin.consent', '/admin/consent' ), |
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('admin.core', None ), |
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('admin.dashboard', '/admin/dashboard' ), |
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('admin.email', '/admin/email' ), |
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('admin.news', '/admin/news' ), |
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('admin.newsletter', '/admin/newsletter' ), |
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('admin.jobs', '/admin/jobs' ), |
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('admin.orga', '/admin/orgas' ), |
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('admin.orga_presence', '/admin/presence' ), |
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('admin.orga_team', '/admin/orga_teams' ), |
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('admin.party', '/admin/parties' ), |
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('admin.seating', '/admin/seating' ), |
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('admin.shop', None ), |
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('admin.shop.article', '/admin/shop/articles' ), |
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('admin.shop.email', '/admin/shop/email' ), |
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('admin.shop.order', '/admin/shop/orders' ), |
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('admin.shop.shipping', '/admin/shop/shipping' ), |
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('admin.shop.shop', '/admin/shop/shop' ), |
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('admin.site', '/admin/sites' ), |
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('admin.snippet', '/admin/snippets' ), |
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('admin.terms', '/admin/terms' ), |
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('admin.ticketing', '/admin/ticketing' ), |
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('admin.ticketing.checkin', '/admin/ticketing/checkin' ), |
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('admin.tourney', '/admin/tourney' ), |
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('admin.user', '/admin/users' ), |
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('admin.user_badge', '/admin/user_badges' ), |
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] |
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def _get_blueprints_api() -> Iterator[BlueprintReg]: |
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yield from [ |
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('api.attendance', '/api/attendances' ), |
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('api.snippet', '/api/snippets' ), |
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('api.tourney.avatar', '/api/tourney/avatars' ), |
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('api.tourney.match.comments', '/api/tourney' ), |
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('api.user', '/api/users' ), |
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('api.user_badge', '/api/user_badges' ), |
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] |
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def _get_blueprints_health() -> Iterator[BlueprintReg]: |
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yield from [ |
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('healthcheck', '/health' ), |
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] |
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def _get_blueprints_metrics() -> Iterator[BlueprintReg]: |
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yield from [ |
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('metrics', '/metrics' ), |
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] |
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def _get_blueprints_debug() -> Iterator[BlueprintReg]: |
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yield from [ |
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('style_guide', '/style_guide' ), |
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] |
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def _add_static_file_url_rules(app: Flask) -> None: |
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"""Add URL rules to for static files.""" |
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for rule_prefix, endpoint in [ |
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('/global', 'global_file'), |
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('/brand', 'brand_file'), |
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('/party', 'party_file'), |
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('/site', 'site_file'), |
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]: |
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rule = rule_prefix + '/<path:filename>' |
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app.add_url_rule( |
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rule, endpoint=endpoint, methods=['GET'], build_only=True |
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) |
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def init_app(app: Flask) -> None: |
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"""Initialize the application after is has been created.""" |
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with app.app_context(): |
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_set_url_root_path(app) |
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site_mode = config.get_site_mode() |
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if site_mode.is_public(): |
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# Incorporate site-specific template overrides. |
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app.jinja_loader = SiteTemplateOverridesLoader() |
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site_id = config.get_current_site_id() |
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# Mount snippets. |
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add_routes_for_snippets(site_id) |
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# Import site-specific code. |
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_load_site_extension(app, site_id) |
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elif site_mode.is_admin() and app.config['RQ_DASHBOARD_ENABLED']: |
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import rq_dashboard |
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app.register_blueprint( |
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rq_dashboard.blueprint, url_prefix='/admin/rq' |
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) |
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def _set_url_root_path(app: Flask) -> None: |
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"""Set an optional URL path to redirect to from the root URL path (`/`). |
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Important: Don't specify the target with a leading slash unless you |
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really mean the root of the host. |
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""" |
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target_url = app.config['ROOT_REDIRECT_TARGET'] |
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if target_url is None: |
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return |
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status_code = app.config['ROOT_REDIRECT_STATUS_CODE'] |
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def _redirect(): |
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return redirect(target_url, status_code) |
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app.add_url_rule('/', endpoint='root', view_func=_redirect) |
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def _load_site_extension(app: Flask, site_id: str) -> None: |
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"""Import and call custom extension code from the site's package, if |
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available. |
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If a site package contains a module named `extension` and it |
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contains a top-level callable named `template_context_processor`, |
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then that callable is registered with the application as a template |
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context processor. |
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""" |
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module_name = f'sites.{site_id}.extension' |
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try: |
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module = import_module(module_name) |
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except ModuleNotFoundError: |
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# No extension module found in site package. |
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return |
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context_processor = getattr(module, 'template_context_processor', None) |
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if context_processor is None: |
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# Context processor not found in module. |
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return |
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if not callable(context_processor): |
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# Context processor object is not callable. |
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return |
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app.context_processor(context_processor) |
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