mirror of
https://github.com/pgadmin-org/pgadmin4.git
synced 2024-11-23 09:16:29 -06:00
748 lines
29 KiB
Python
748 lines
29 KiB
Python
##########################################################################
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#
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# pgAdmin 4 - PostgreSQL Tools
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#
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# Copyright (C) 2013 - 2019, The pgAdmin Development Team
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# This software is released under the PostgreSQL Licence
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#
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##########################################################################
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"""The main pgAdmin module. This handles the application initialisation tasks,
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such as setup of logging, dynamic loading of modules etc."""
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import logging
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import os
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import sys
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from types import MethodType
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from collections import defaultdict
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from importlib import import_module
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from flask import Flask, abort, request, current_app, session, url_for
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from werkzeug.exceptions import HTTPException
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from flask_babelex import Babel, gettext
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from flask_login import user_logged_in, user_logged_out
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from flask_mail import Mail
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from flask_paranoid import Paranoid
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from flask_security import Security, SQLAlchemyUserDatastore, current_user
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from flask_security.utils import login_user, logout_user
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from werkzeug.datastructures import ImmutableDict
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from werkzeug.local import LocalProxy
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from werkzeug.utils import find_modules
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from pgadmin.model import db, Role, Server, ServerGroup, \
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User, Keys, Version, SCHEMA_VERSION as CURRENT_SCHEMA_VERSION
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from pgadmin.utils import PgAdminModule, driver, KeyManager
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from pgadmin.utils.preferences import Preferences
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from pgadmin.utils.session import create_session_interface, pga_unauthorised
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from pgadmin.utils.versioned_template_loader import VersionedTemplateLoader
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from datetime import timedelta
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from pgadmin.setup import get_version, set_version
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from pgadmin.utils.ajax import internal_server_error
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from pgadmin.utils.csrf import pgCSRFProtect
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# If script is running under python3, it will not have the xrange function
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# defined
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winreg = None
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if sys.version_info[0] >= 3:
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xrange = range
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if os.name == 'nt':
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import winreg
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elif os.name == 'nt':
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import _winreg as winreg
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class PgAdmin(Flask):
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def __init__(self, *args, **kwargs):
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# Set the template loader to a postgres-version-aware loader
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self.jinja_options = ImmutableDict(
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extensions=['jinja2.ext.autoescape', 'jinja2.ext.with_'],
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loader=VersionedTemplateLoader(self)
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)
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self.logout_hooks = []
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super(PgAdmin, self).__init__(*args, **kwargs)
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def find_submodules(self, basemodule):
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for module_name in find_modules(basemodule, True):
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if module_name in self.config['MODULE_BLACKLIST']:
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self.logger.info(
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'Skipping blacklisted module: %s' % module_name
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)
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continue
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self.logger.info('Examining potential module: %s' % module_name)
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module = import_module(module_name)
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for key in list(module.__dict__.keys()):
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if isinstance(module.__dict__[key], PgAdminModule):
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yield module.__dict__[key]
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@property
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def submodules(self):
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for blueprint in self.blueprints.values():
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if isinstance(blueprint, PgAdminModule):
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yield blueprint
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@property
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def stylesheets(self):
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stylesheets = []
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for module in self.submodules:
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stylesheets.extend(getattr(module, "stylesheets", []))
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return set(stylesheets)
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@property
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def messages(self):
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messages = dict()
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for module in self.submodules:
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messages.update(getattr(module, "messages", dict()))
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return messages
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@property
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def exposed_endpoint_url_map(self):
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#############################################################
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# To handle WSGI paths
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# If user has setup application under WSGI alias
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# like 'localhost/pgadmin4' then we have to append '/pgadmin4'
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# into endpoints
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#############################################################
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import config
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is_wsgi_root_present = False
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if config.SERVER_MODE:
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pgadmin_root_path = url_for('browser.index')
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if pgadmin_root_path != '/browser/':
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is_wsgi_root_present = True
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wsgi_root_path = pgadmin_root_path.replace(
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'/browser/', ''
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)
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def get_full_url_path(url):
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"""
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Generate endpoint URL at per WSGI alias
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"""
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if is_wsgi_root_present and url:
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return wsgi_root_path + url
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else:
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return url
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# Fetch all endpoints and their respective url
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for rule in current_app.url_map.iter_rules('static'):
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yield rule.endpoint, get_full_url_path(rule.rule)
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for module in self.submodules:
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for endpoint in module.exposed_endpoints:
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for rule in current_app.url_map.iter_rules(endpoint):
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yield rule.endpoint, get_full_url_path(rule.rule)
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@property
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def javascripts(self):
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scripts = []
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scripts_names = []
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# Remove duplicate javascripts from the list
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for module in self.submodules:
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module_scripts = getattr(module, "javascripts", [])
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for s in module_scripts:
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if s['name'] not in scripts_names:
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scripts.append(s)
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scripts_names.append(s['name'])
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return scripts
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@property
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def panels(self):
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panels = []
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for module in self.submodules:
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panels.extend(module.get_panels())
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return panels
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@property
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def menu_items(self):
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from operator import attrgetter
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menu_items = defaultdict(list)
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for module in self.submodules:
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for key, value in module.menu_items.items():
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menu_items[key].extend(value)
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menu_items = dict((key, sorted(value, key=attrgetter('priority')))
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for key, value in menu_items.items())
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return menu_items
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def register_logout_hook(self, module):
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if hasattr(module, 'on_logout') and \
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type(getattr(module, 'on_logout')) == MethodType:
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self.logout_hooks.append(module)
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def _find_blueprint():
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if request.blueprint:
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return current_app.blueprints[request.blueprint]
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current_blueprint = LocalProxy(_find_blueprint)
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def create_app(app_name=None):
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# Configuration settings
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import config
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if not app_name:
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app_name = config.APP_NAME
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# Only enable password related functionality in server mode.
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if config.SERVER_MODE is True:
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# Some times we need to access these config params where application
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# context is not available (we can't use current_app.config in those
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# cases even with current_app.app_context())
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# So update these params in config itself.
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# And also these updated config values will picked up by application
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# since we are updating config before the application instance is
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# created.
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config.SECURITY_RECOVERABLE = True
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config.SECURITY_CHANGEABLE = True
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# Now we'll open change password page in alertify dialog
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# we don't want it to redirect to main page after password
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# change operation so we will open the same password change page again.
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config.SECURITY_POST_CHANGE_VIEW = 'browser.change_password'
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"""Create the Flask application, startup logging and dynamically load
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additional modules (blueprints) that are found in this directory."""
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app = PgAdmin(__name__, static_url_path='/static')
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# Removes unwanted whitespace from render_template function
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app.jinja_env.trim_blocks = True
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app.config.from_object(config)
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app.config.update(dict(PROPAGATE_EXCEPTIONS=True))
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##########################################################################
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# Setup logging and log the application startup
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##########################################################################
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# We won't care about errors in the logging system, we are more
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# interested in application errors.
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logging.raiseExceptions = False
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# Add SQL level logging, and set the base logging level
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logging.addLevelName(25, 'SQL')
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app.logger.setLevel(logging.DEBUG)
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app.logger.handlers = []
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# We also need to update the handler on the webserver in order to see
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# request. Setting the level prevents werkzeug from setting up it's own
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# stream handler thus ensuring all the logging goes through the pgAdmin
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# logger.
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logger = logging.getLogger('werkzeug')
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logger.setLevel(logging.INFO)
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# Set SQLITE_PATH to TEST_SQLITE_PATH while running test cases
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if (
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'PGADMIN_TESTING_MODE' in os.environ and
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os.environ['PGADMIN_TESTING_MODE'] == '1'
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):
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config.SQLITE_PATH = config.TEST_SQLITE_PATH
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config.MASTER_PASSWORD_REQUIRED = False
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config.UPGRADE_CHECK_ENABLED = False
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# Ensure the various working directories exist
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from pgadmin.setup import create_app_data_directory, db_upgrade
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create_app_data_directory(config)
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# File logging
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fh = logging.FileHandler(config.LOG_FILE, encoding='utf-8')
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fh.setLevel(config.FILE_LOG_LEVEL)
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fh.setFormatter(logging.Formatter(config.FILE_LOG_FORMAT))
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app.logger.addHandler(fh)
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logger.addHandler(fh)
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# Console logging
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ch = logging.StreamHandler()
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ch.setLevel(config.CONSOLE_LOG_LEVEL)
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ch.setFormatter(logging.Formatter(config.CONSOLE_LOG_FORMAT))
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app.logger.addHandler(ch)
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logger.addHandler(ch)
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# Log the startup
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app.logger.info('########################################################')
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app.logger.info('Starting %s v%s...', config.APP_NAME, config.APP_VERSION)
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app.logger.info('########################################################')
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app.logger.debug("Python syspath: %s", sys.path)
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##########################################################################
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# Setup i18n
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##########################################################################
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# Initialise i18n
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babel = Babel(app)
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app.logger.debug('Available translations: %s' % babel.list_translations())
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@babel.localeselector
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def get_locale():
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"""Get the language for the user."""
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language = 'en'
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if config.SERVER_MODE is False:
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# Get the user language preference from the miscellaneous module
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if current_user.is_authenticated:
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user_id = current_user.id
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else:
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user = user_datastore.get_user(config.DESKTOP_USER)
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if user is not None:
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user_id = user.id
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user_language = Preferences.raw_value(
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'miscellaneous', 'user_language', None, user_id
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)
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if user_language is not None:
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language = user_language
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else:
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# If language is available in get request then return the same
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# otherwise check the session or cookie
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data = request.form
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if 'language' in data:
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language = data['language'] or language
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setattr(session, 'PGADMIN_LANGUAGE', language)
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elif hasattr(session, 'PGADMIN_LANGUAGE'):
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language = getattr(session, 'PGADMIN_LANGUAGE', language)
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elif hasattr(request.cookies, 'PGADMIN_LANGUAGE'):
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language = getattr(
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request.cookies, 'PGADMIN_LANGUAGE', language
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)
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return language
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##########################################################################
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# Setup authentication
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##########################################################################
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app.config['SQLALCHEMY_DATABASE_URI'] = u'sqlite:///{0}?timeout={1}' \
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.format(config.SQLITE_PATH.replace(u'\\', u'/'),
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getattr(config, 'SQLITE_TIMEOUT', 500)
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)
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# Create database connection object and mailer
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db.init_app(app)
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##########################################################################
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# Upgrade the schema (if required)
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##########################################################################
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with app.app_context():
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# Run migration for the first time i.e. create database
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from config import SQLITE_PATH
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# If version not available, user must have aborted. Tables are not
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# created and so its an empty db
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if not os.path.exists(SQLITE_PATH) or get_version() == -1:
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db_upgrade(app)
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else:
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schema_version = get_version()
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# Run migration if current schema version is greater than the
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# schema version stored in version table
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if CURRENT_SCHEMA_VERSION >= schema_version:
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db_upgrade(app)
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# Update schema version to the latest
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if CURRENT_SCHEMA_VERSION > schema_version:
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set_version(CURRENT_SCHEMA_VERSION)
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db.session.commit()
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if os.name != 'nt':
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os.chmod(config.SQLITE_PATH, 0o600)
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Mail(app)
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import pgadmin.utils.paths as paths
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paths.init_app(app)
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# Setup Flask-Security
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user_datastore = SQLAlchemyUserDatastore(db, User, Role)
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security = Security(None, user_datastore)
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##########################################################################
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# Setup security
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##########################################################################
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with app.app_context():
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config.CSRF_SESSION_KEY = Keys.query.filter_by(
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name='CSRF_SESSION_KEY').first().value
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config.SECRET_KEY = Keys.query.filter_by(
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name='SECRET_KEY').first().value
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config.SECURITY_PASSWORD_SALT = Keys.query.filter_by(
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name='SECURITY_PASSWORD_SALT').first().value
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# Update the app.config with proper security keyes for signing CSRF data,
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# signing cookies, and the SALT for hashing the passwords.
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app.config.update(dict({
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'CSRF_SESSION_KEY': config.CSRF_SESSION_KEY,
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'SECRET_KEY': config.SECRET_KEY,
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'SECURITY_PASSWORD_SALT': config.SECURITY_PASSWORD_SALT,
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'SESSION_COOKIE_DOMAIN': config.SESSION_COOKIE_DOMAIN,
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# CSRF Token expiration till session expires
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'WTF_CSRF_TIME_LIMIT': getattr(config, 'CSRF_TIME_LIMIT', None),
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'WTF_CSRF_METHODS': ['GET', 'POST', 'PUT', 'DELETE'],
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}))
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security.init_app(app, user_datastore)
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# register custom unauthorised handler.
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app.login_manager.unauthorized_handler(pga_unauthorised)
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# Set the permanent session lifetime to the specified value in config file.
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app.permanent_session_lifetime = timedelta(
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days=config.SESSION_EXPIRATION_TIME)
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app.session_interface = create_session_interface(
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app, config.SESSION_SKIP_PATHS
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)
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# Make the Session more secure against XSS & CSRF when running in web mode
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if config.SERVER_MODE:
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paranoid = Paranoid(app)
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paranoid.redirect_view = 'browser.index'
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##########################################################################
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# Load all available server drivers
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##########################################################################
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driver.init_app(app)
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##########################################################################
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# Register language to the preferences after login
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##########################################################################
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@user_logged_in.connect_via(app)
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def register_language(sender, user):
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# After logged in, set the language in the preferences if we get from
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# the login page
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data = request.form
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if 'language' in data:
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language = data['language']
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# Set the user language preference
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misc_preference = Preferences.module('miscellaneous')
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user_languages = misc_preference.preference(
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'user_language'
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)
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if user_languages and language:
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language = user_languages.set(language)
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##########################################################################
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# Register any local servers we can discover
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##########################################################################
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@user_logged_in.connect_via(app)
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def on_user_logged_in(sender, user):
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# Keep hold of the user ID
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user_id = user.id
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# Get the first server group for the user
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servergroup_id = 1
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servergroups = ServerGroup.query.filter_by(
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user_id=user_id
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).order_by("id")
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if servergroups.count() > 0:
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servergroup = servergroups.first()
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servergroup_id = servergroup.id
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'''Add a server to the config database'''
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def add_server(user_id, servergroup_id, name, superuser, port,
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discovery_id, comment):
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# Create a server object if needed, and store it.
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servers = Server.query.filter_by(
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user_id=user_id,
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discovery_id=svr_discovery_id
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).order_by("id")
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if servers.count() > 0:
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return
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svr = Server(user_id=user_id,
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servergroup_id=servergroup_id,
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name=name,
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host='localhost',
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port=port,
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maintenance_db='postgres',
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username=superuser,
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ssl_mode='prefer',
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comment=svr_comment,
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discovery_id=discovery_id)
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db.session.add(svr)
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db.session.commit()
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# Figure out what servers are present
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if winreg is not None:
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arch_keys = set()
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proc_arch = os.environ['PROCESSOR_ARCHITECTURE'].lower()
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try:
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proc_arch64 = os.environ['PROCESSOR_ARCHITEW6432'].lower()
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except Exception as e:
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proc_arch64 = None
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if proc_arch == 'x86' and not proc_arch64:
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arch_keys.add(0)
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elif proc_arch == 'x86' or proc_arch == 'amd64':
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arch_keys.add(winreg.KEY_WOW64_32KEY)
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arch_keys.add(winreg.KEY_WOW64_64KEY)
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for arch_key in arch_keys:
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for server_type in ('PostgreSQL', 'EnterpriseDB'):
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try:
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root_key = winreg.OpenKey(
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winreg.HKEY_LOCAL_MACHINE,
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"SOFTWARE\\" + server_type + "\Services", 0,
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winreg.KEY_READ | arch_key
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)
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for i in xrange(0, winreg.QueryInfoKey(root_key)[0]):
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inst_id = winreg.EnumKey(root_key, i)
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inst_key = winreg.OpenKey(root_key, inst_id)
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svr_name = winreg.QueryValueEx(
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inst_key, 'Display Name'
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)[0]
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svr_superuser = winreg.QueryValueEx(
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inst_key, 'Database Superuser'
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)[0]
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svr_port = winreg.QueryValueEx(inst_key, 'Port')[0]
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svr_discovery_id = inst_id
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svr_comment = gettext(
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"Auto-detected %s installation with the data "
|
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"directory at %s" % (
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winreg.QueryValueEx(
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inst_key, 'Display Name'
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)[0],
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winreg.QueryValueEx(
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inst_key, 'Data Directory'
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)[0]
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)
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)
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|
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add_server(
|
|
user_id, servergroup_id, svr_name,
|
|
svr_superuser, svr_port,
|
|
svr_discovery_id, svr_comment
|
|
)
|
|
|
|
inst_key.Close()
|
|
except Exception as e:
|
|
pass
|
|
else:
|
|
# We use the postgres-winreg.ini file on non-Windows
|
|
try:
|
|
from configparser import ConfigParser
|
|
except ImportError:
|
|
from ConfigParser import ConfigParser # Python 2
|
|
|
|
registry = ConfigParser()
|
|
|
|
try:
|
|
registry.read('/etc/postgres-reg.ini')
|
|
sections = registry.sections()
|
|
|
|
# Loop the sections, and get the data from any that are PG or PPAS
|
|
for section in sections:
|
|
if (
|
|
section.startswith('PostgreSQL/') or
|
|
section.startswith('EnterpriseDB/')
|
|
):
|
|
svr_name = registry.get(section, 'Description')
|
|
svr_superuser = registry.get(section, 'Superuser')
|
|
|
|
# getint function throws exception if value is blank.
|
|
# Ex: Port=
|
|
# In such case we should handle the exception and continue
|
|
# to read the next section of the config file.
|
|
try:
|
|
svr_port = registry.getint(section, 'Port')
|
|
except ValueError:
|
|
continue
|
|
|
|
svr_discovery_id = section
|
|
description = registry.get(section, 'Description')
|
|
data_directory = registry.get(section, 'DataDirectory')
|
|
if hasattr(str, 'decode'):
|
|
description = description.decode('utf-8')
|
|
data_directory = data_directory.decode('utf-8')
|
|
svr_comment = gettext(u"Auto-detected %s installation "
|
|
u"with the data directory at %s" % (
|
|
description,
|
|
data_directory
|
|
)
|
|
)
|
|
add_server(user_id, servergroup_id, svr_name,
|
|
svr_superuser, svr_port, svr_discovery_id,
|
|
svr_comment)
|
|
|
|
except Exception as e:
|
|
pass
|
|
|
|
@user_logged_in.connect_via(app)
|
|
@user_logged_out.connect_via(app)
|
|
def force_session_write(app, user):
|
|
session.force_write = True
|
|
|
|
@user_logged_in.connect_via(app)
|
|
def store_crypt_key(app, user):
|
|
# in desktop mode, master password is used to encrypt/decrypt
|
|
# and is stored in the keyManager memory
|
|
if config.SERVER_MODE:
|
|
if 'password' in request.form:
|
|
current_app.keyManager.set(request.form['password'])
|
|
|
|
@user_logged_out.connect_via(app)
|
|
def current_user_cleanup(app, user):
|
|
from config import PG_DEFAULT_DRIVER
|
|
from pgadmin.utils.driver import get_driver
|
|
from flask import current_app
|
|
|
|
# remove key
|
|
current_app.keyManager.reset()
|
|
|
|
for mdl in current_app.logout_hooks:
|
|
try:
|
|
mdl.on_logout(user)
|
|
except Exception as e:
|
|
current_app.logger.exception(e)
|
|
|
|
_driver = get_driver(PG_DEFAULT_DRIVER)
|
|
_driver.gc_own()
|
|
|
|
##########################################################################
|
|
# Load plugin modules
|
|
##########################################################################
|
|
for module in app.find_submodules('pgadmin'):
|
|
app.logger.info('Registering blueprint module: %s' % module)
|
|
app.register_blueprint(module)
|
|
app.register_logout_hook(module)
|
|
|
|
##########################################################################
|
|
# Handle the desktop login
|
|
##########################################################################
|
|
|
|
@app.before_request
|
|
def before_request():
|
|
"""Login the default user if running in desktop mode"""
|
|
|
|
# Check the auth key is valid, if it's set, and we're not in server
|
|
# mode, and it's not a help file request.
|
|
if not config.SERVER_MODE and app.PGADMIN_KEY != '':
|
|
if (
|
|
('key' not in request.args or
|
|
request.args['key'] != app.PGADMIN_KEY) and
|
|
request.cookies.get('PGADMIN_KEY') != app.PGADMIN_KEY and
|
|
request.endpoint != 'help.static'
|
|
):
|
|
abort(401)
|
|
|
|
if not config.SERVER_MODE and not current_user.is_authenticated:
|
|
user = user_datastore.get_user(config.DESKTOP_USER)
|
|
# Throw an error if we failed to find the desktop user, to give
|
|
# the sysadmin a hint. We'll continue to try to login anyway as
|
|
# that'll through a nice 500 error for us.
|
|
if user is None:
|
|
app.logger.error(
|
|
'The desktop user %s was not found in the configuration '
|
|
'database.'
|
|
% config.DESKTOP_USER
|
|
)
|
|
abort(401)
|
|
login_user(user)
|
|
|
|
# if the server is restarted the in memory key will be lost
|
|
# but the user session may still be active. Logout the user
|
|
# to get the key again when login
|
|
if config.SERVER_MODE and current_user.is_authenticated:
|
|
if current_app.keyManager.get() is None and \
|
|
request.endpoint not in ('security.login',
|
|
'security.logout'):
|
|
logout_user()
|
|
|
|
@app.after_request
|
|
def after_request(response):
|
|
if 'key' in request.args:
|
|
domain = dict()
|
|
if config.COOKIE_DEFAULT_DOMAIN and \
|
|
config.COOKIE_DEFAULT_DOMAIN != 'localhost':
|
|
domain['domain'] = config.COOKIE_DEFAULT_DOMAIN
|
|
response.set_cookie('PGADMIN_KEY', value=request.args['key'],
|
|
path=config.COOKIE_DEFAULT_PATH,
|
|
**domain)
|
|
|
|
# X-Frame-Options for security
|
|
if config.X_FRAME_OPTIONS != "" and \
|
|
config.X_FRAME_OPTIONS.lower() != "deny":
|
|
response.headers["X-Frame-Options"] = config.X_FRAME_OPTIONS
|
|
|
|
return response
|
|
|
|
##########################################################################
|
|
# Cache busting
|
|
##########################################################################
|
|
|
|
# Version number to be added to all static file url requests
|
|
# This is used by url_for function when generating urls
|
|
# This will solve caching issues when application is upgrading
|
|
# This is called - Cache Busting
|
|
@app.url_defaults
|
|
def add_internal_version(endpoint, values):
|
|
extensions = config.APP_VERSION_EXTN
|
|
|
|
# Add the internal version only if it is set
|
|
if config.APP_VERSION_PARAM is not None and \
|
|
config.APP_VERSION_PARAM != '':
|
|
# If there is a filename, add the version
|
|
if 'filename' in values \
|
|
and values['filename'].endswith(extensions):
|
|
values[config.APP_VERSION_PARAM] = config.APP_VERSION_INT
|
|
else:
|
|
# Sometimes there may be direct endpoint for some files
|
|
# There will be only one rule for such endpoints
|
|
urls = [url for url in app.url_map.iter_rules(endpoint)]
|
|
if len(urls) == 1 and urls[0].rule.endswith(extensions):
|
|
values[config.APP_VERSION_PARAM] = \
|
|
config.APP_VERSION_INT
|
|
|
|
# Strip away internal version param before sending further to app as it was
|
|
# required for cache busting only
|
|
@app.url_value_preprocessor
|
|
def strip_version_number(endpoint, values):
|
|
if values and config.APP_VERSION_PARAM in values:
|
|
values.pop(config.APP_VERSION_PARAM)
|
|
|
|
##########################################################################
|
|
# Minify output
|
|
##########################################################################
|
|
if not config.DEBUG:
|
|
from flask_htmlmin import HTMLMIN
|
|
HTMLMIN(app)
|
|
|
|
@app.context_processor
|
|
def inject_blueprint():
|
|
"""Inject a reference to the current blueprint, if any."""
|
|
return {
|
|
'current_app': current_app,
|
|
'current_blueprint': current_blueprint
|
|
}
|
|
|
|
@app.errorhandler(Exception)
|
|
def all_exception_handler(e):
|
|
current_app.logger.error(e, exc_info=True)
|
|
return internal_server_error(errormsg=str(e))
|
|
|
|
# Exclude HTTPexception from above handler (all_exception_handler)
|
|
# HTTPException are user defined exceptions and those should be returned
|
|
# as is
|
|
@app.errorhandler(HTTPException)
|
|
def http_exception_handler(e):
|
|
current_app.logger.error(e, exc_info=True)
|
|
return e
|
|
|
|
# Intialize the key manager
|
|
app.keyManager = KeyManager()
|
|
|
|
##########################################################################
|
|
# Protection against CSRF attacks
|
|
##########################################################################
|
|
with app.app_context():
|
|
pgCSRFProtect.init_app(app)
|
|
|
|
##########################################################################
|
|
# All done!
|
|
##########################################################################
|
|
return app
|