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146 lines
4.8 KiB
146 lines
4.8 KiB
#!/usr/bin/python3
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# Launch as a eventlet.wsgi server instance.
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from distutils.util import strtobool
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from json.decoder import JSONDecodeError
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import eventlet
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import eventlet.wsgi
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import getopt
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import os
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import signal
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import socket
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import sys
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from . import store, changedetection_app, content_fetcher
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from . import __version__
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# Only global so we can access it in the signal handler
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app = None
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datastore = None
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def sigterm_handler(_signo, _stack_frame):
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global app
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global datastore
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# app.config.exit.set()
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print('Shutdown: Got SIGTERM, DB saved to disk')
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datastore.sync_to_json()
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# raise SystemExit
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def main():
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global datastore
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global app
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ssl_mode = False
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host = ''
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port = os.environ.get('PORT') or 5000
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do_cleanup = False
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datastore_path = None
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# On Windows, create and use a default path.
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if os.name == 'nt':
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datastore_path = os.path.expandvars(r'%APPDATA%\changedetection.io')
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os.makedirs(datastore_path, exist_ok=True)
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else:
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# Must be absolute so that send_from_directory doesnt try to make it relative to backend/
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datastore_path = os.path.join(os.getcwd(), "../datastore")
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try:
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opts, args = getopt.getopt(sys.argv[1:], "Ccsd:h:p:", "port")
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except getopt.GetoptError:
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print('backend.py -s SSL enable -h [host] -p [port] -d [datastore path]')
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sys.exit(2)
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create_datastore_dir = False
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for opt, arg in opts:
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if opt == '-s':
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ssl_mode = True
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if opt == '-h':
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host = arg
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if opt == '-p':
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port = int(arg)
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if opt == '-d':
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datastore_path = arg
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# Cleanup (remove text files that arent in the index)
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if opt == '-c':
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do_cleanup = True
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# Create the datadir if it doesnt exist
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if opt == '-C':
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create_datastore_dir = True
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# isnt there some @thingy to attach to each route to tell it, that this route needs a datastore
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app_config = {'datastore_path': datastore_path}
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if not os.path.isdir(app_config['datastore_path']):
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if create_datastore_dir:
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os.mkdir(app_config['datastore_path'])
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else:
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print(
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"ERROR: Directory path for the datastore '{}' does not exist, cannot start, please make sure the directory exists or specify a directory with the -d option.\n"
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"Or use the -C parameter to create the directory.".format(app_config['datastore_path']), file=sys.stderr)
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sys.exit(2)
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try:
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datastore = store.ChangeDetectionStore(datastore_path=app_config['datastore_path'], version_tag=__version__)
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except JSONDecodeError as e:
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# Dont' start if the JSON DB looks corrupt
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print ("ERROR: JSON DB or Proxy List JSON at '{}' appears to be corrupt, aborting".format(app_config['datastore_path']))
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print(str(e))
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return
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app = changedetection_app(app_config, datastore)
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signal.signal(signal.SIGTERM, sigterm_handler)
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# Go into cleanup mode
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if do_cleanup:
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datastore.remove_unused_snapshots()
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app.config['datastore_path'] = datastore_path
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@app.context_processor
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def inject_version():
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return dict(right_sticky="v{}".format(datastore.data['version_tag']),
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new_version_available=app.config['NEW_VERSION_AVAILABLE'],
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has_password=datastore.data['settings']['application']['password'] != False
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)
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# Monitored websites will not receive a Referer header when a user clicks on an outgoing link.
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# @Note: Incompatible with password login (and maybe other features) for now, submit a PR!
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@app.after_request
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def hide_referrer(response):
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if strtobool(os.getenv("HIDE_REFERER", 'false')):
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response.headers["Referrer-Policy"] = "no-referrer"
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return response
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# Proxy sub-directory support
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# Set environment var USE_X_SETTINGS=1 on this script
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# And then in your proxy_pass settings
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#
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# proxy_set_header Host "localhost";
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# proxy_set_header X-Forwarded-Prefix /app;
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if os.getenv('USE_X_SETTINGS'):
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print ("USE_X_SETTINGS is ENABLED\n")
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from werkzeug.middleware.proxy_fix import ProxyFix
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app.wsgi_app = ProxyFix(app.wsgi_app, x_prefix=1, x_host=1)
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if ssl_mode:
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# @todo finalise SSL config, but this should get you in the right direction if you need it.
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eventlet.wsgi.server(eventlet.wrap_ssl(eventlet.listen((host, port), socket.AF_INET6),
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certfile='cert.pem',
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keyfile='privkey.pem',
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server_side=True), app)
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else:
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eventlet.wsgi.server(eventlet.listen((host, int(port)), socket.AF_INET6), app)
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