########################################################################## # # pgAdmin 4 - PostgreSQL Tools # # Copyright (C) 2013 - 2023, The pgAdmin Development Team # This software is released under the PostgreSQL Licence # ########################################################################## """This is the main application entry point for pgAdmin 4. If running on a webserver, this will provide the WSGI interface, otherwise, we're going to start a web server.""" import sys if sys.version_info <= (3, 9): import select if sys.version_info < (3, 4): raise RuntimeError('This application must be run under Python 3.4 ' 'or later.') import builtins import os # We need to include the root directory in sys.path to ensure that we can # find everything we need when running in the standalone runtime. if sys.path[0] != os.path.dirname(os.path.realpath(__file__)): sys.path.insert(0, os.path.dirname(os.path.realpath(__file__))) # Grab the SERVER_MODE if it's been set by the runtime if 'PGADMIN_SERVER_MODE' in os.environ: if os.environ['PGADMIN_SERVER_MODE'] == 'OFF': builtins.SERVER_MODE = False else: builtins.SERVER_MODE = True else: builtins.SERVER_MODE = None if (3, 10) > sys.version_info > (3, 8) and os.name == 'posix': # Fix eventlet issue with Python 3.9. # Ref: https://github.com/eventlet/eventlet/issues/670 # This was causing issue in psycopg3 import select from eventlet import hubs hubs.use_hub("poll") import selectors selectors.DefaultSelector = selectors.PollSelector import config import setup from pgadmin import create_app, socketio from pgadmin.utils.constants import INTERNAL # Get the config database schema version. We store this in pgadmin.model # as it turns out that putting it in the config files isn't a great idea from pgadmin.model import SCHEMA_VERSION ########################################################################## # Support reverse proxying ########################################################################## class ReverseProxied(): def __init__(self, app): self.app = app # https://werkzeug.palletsprojects.com/en/0.15.x/middleware/proxy_fix try: from werkzeug.middleware.proxy_fix import ProxyFix self.app = ProxyFix(app, x_for=config.PROXY_X_FOR_COUNT, x_proto=config.PROXY_X_PROTO_COUNT, x_host=config.PROXY_X_HOST_COUNT, x_port=config.PROXY_X_PORT_COUNT, x_prefix=config.PROXY_X_PREFIX_COUNT ) except ImportError: pass def __call__(self, environ, start_response): script_name = environ.get("HTTP_X_SCRIPT_NAME", "") if script_name: environ["SCRIPT_NAME"] = script_name path_info = environ["PATH_INFO"] if path_info.startswith(script_name): environ["PATH_INFO"] = path_info[len(script_name):] scheme = environ.get("HTTP_X_SCHEME", "") if scheme: environ["wsgi.url_scheme"] = scheme return self.app(environ, start_response) ########################################################################## # Sanity checks ########################################################################## config.SETTINGS_SCHEMA_VERSION = SCHEMA_VERSION # Check if the database exists. If it does not, create it. setup_db_required = False if not os.path.isfile(config.SQLITE_PATH): setup_db_required = True ########################################################################## # Create the app and configure it. It is created outside main so that # it can be imported ########################################################################## app = create_app() app.config['sessions'] = dict() if setup_db_required: setup.setup_db(app) # Authentication sources if len(config.AUTHENTICATION_SOURCES) > 0: # Creating a temporary auth source list removing INTERNAL # This change is done to avoid selecting INTERNAL authentication when user # mistakenly keeps that the first option. auth_source = [x for x in config.AUTHENTICATION_SOURCES if x != INTERNAL] app.PGADMIN_EXTERNAL_AUTH_SOURCE = auth_source[0] \ if len(auth_source) > 0 else INTERNAL else: app.PGADMIN_EXTERNAL_AUTH_SOURCE = INTERNAL # Start the web server. The port number should have already been set by the # runtime if we're running in desktop mode, otherwise we'll just use the # Flask default. app.PGADMIN_RUNTIME = False app.logger.debug( 'Config server mode: %s', config.SERVER_MODE ) config.EFFECTIVE_SERVER_PORT = None if 'PGADMIN_INT_PORT' in os.environ: port = os.environ['PGADMIN_INT_PORT'] app.logger.debug( 'Running under the desktop runtime, port: %s', port ) config.EFFECTIVE_SERVER_PORT = int(port) else: app.logger.debug( 'Not running under the desktop runtime, port: %s', config.DEFAULT_SERVER_PORT ) config.EFFECTIVE_SERVER_PORT = config.DEFAULT_SERVER_PORT # Set the key if appropriate if 'PGADMIN_INT_KEY' in os.environ: app.PGADMIN_INT_KEY = os.environ['PGADMIN_INT_KEY'] app.logger.debug("Desktop security key: %s" % app.PGADMIN_INT_KEY) app.PGADMIN_RUNTIME = True else: app.PGADMIN_INT_KEY = '' if not app.PGADMIN_RUNTIME: app.wsgi_app = ReverseProxied(app.wsgi_app) ########################################################################## # The entry point ########################################################################## def main(): # Set null device file path to stdout, stdin, stderr if they are None for _name in ('stdin', 'stdout', 'stderr'): if getattr(sys, _name) is None: setattr(sys, _name, open(os.devnull, 'r' if _name == 'stdin' else 'w')) # Output a startup message if we're not under the runtime and startup. # If we're under WSGI, we don't need to worry about this if not app.PGADMIN_RUNTIME: print( "Starting %s. Please navigate to http://%s:%d in your browser." % (config.APP_NAME, config.DEFAULT_SERVER, config.EFFECTIVE_SERVER_PORT) ) sys.stdout.flush() else: # For unknown reason the runtime does not pass the environment # variables (i.e. PYTHONHOME, and PYTHONPATH), to the Python # sub-processes, leading to failures executing background processes. # # This has been observed only on windows. On *nix systems, it is likely # picking the system python environment, which is good enough to run # the process-executor. # # Setting PYTHONHOME launch them properly. from pgadmin.utils import IS_WIN if IS_WIN: os.environ['PYTHONHOME'] = sys.prefix # Initialize Flask service only once # If `WERKZEUG_RUN_MAIN` is None, i.e: app is initializing for first time # so set `use_reloader` = False, thus reload won't call. # Reference: # https://github.com/pallets/werkzeug/issues/220#issuecomment-11176538 try: if config.DEBUG: app.run( host=config.DEFAULT_SERVER, port=config.EFFECTIVE_SERVER_PORT, debug=config.DEBUG, use_reloader=( (not app.PGADMIN_RUNTIME) and os.environ.get("WERKZEUG_RUN_MAIN") is not None ), threaded=config.THREADED_MODE ) else: try: socketio.run( app, debug=config.DEBUG, allow_unsafe_werkzeug=True, host=config.DEFAULT_SERVER, port=config.EFFECTIVE_SERVER_PORT, ) except KeyboardInterrupt: print("CLOSE SERVER") socketio.stop() except IOError: app.logger.error("Error starting the app server: %s", sys.exc_info()) ########################################################################## # Server startup ########################################################################## if __name__ == '__main__': main()