#!/usr/bin/python
# -*- coding: utf-8 -*-
#
# Copyright (C) 2011-2013 Cesnet z.s.p.o
# Use of this source is governed by a 3-clause BSD-style license, see LICENSE file.
import sys
import os
import logging
import logging.handlers
import ConfigParser
from traceback import format_tb
import M2Crypto.X509
import json
import MySQLdb as my
import MySQLdb.cursors as mycursors
from uuid import uuid4
from time import time, gmtime
from math import trunc
from io import BytesIO
from urlparse import parse_qs
from os import path
# for local version of up to date jsonschema
sys.path.append(path.join(path.dirname(__file__), "..", "lib"))
from jsonschema import Draft4Validator, FormatChecker
VERSION = "3.0-not-even-alpha"
class Error(Exception):
def __init__(self, message, error=500, method=None,
detail=None, exc=(None, None, None)):
self.error = int(error)
self.method = method
self.message = message
self.detail = detail
(self.exctype, self.excval, self.exctb) = exc or sys.exc_info()
self.cause = self.excval # compatibility with other exceptions
def __str__(self):
out = []
out.append("Error(%s)" % (self.error))
if self.method is not None:
out.append(" in \"%s\"" % self.method)
if self.message is not None:
out.append(": %s" % self.message)
if self.excval is not None:
out.append(" - cause was %s: %s" % (type(self.excval).__name__, str(self.excval)))
return "".join(out)
def info_str(self):
return ("Detail: %s" % self.detail) or ""
def debug_str(self):
out = []
if self.excval is not None:
out.append("Exception %s: %s\n" % (type(self.excval).__name__, str(self.excval)))
if self.exctb is not None:
out.append("Traceback:\n%s" % "".join(format_tb(self.exctb)))
return "".join(out)
def to_dict(self):
d = {}
if self.error is not None:
d["error"] = self.error
if self.method is not None:
d["method"] = self.method
if self.message is not None:
d["message"] = self.message
if self.detail is not None:
d["detail"] = self.detail
return d
def get_clean_root_logger(level=logging.INFO):
""" Attempts to get logging module into clean slate state """
# We want to be able to set up at least stderr logger before any
# configuration is read, and then later get rid of it and set up
# whatever administrator requires.
# However, there can exist only one logger, but we want to get a clean
# slate everytime we initialize StreamLogger or FileLogger... which
# is not exactly supported by logging module.
# So, we look directly inside logger class and clean up handlers/filters
# manually.
logger = logging.getLogger() # no need to create new
logger.setLevel(level)
while logger.handlers:
logger.removeHandler(logger.handlers[0])
while logger.filters:
logger.removeFilter(logger.filters[0])
return logger
def StreamLogger(stream=sys.stderr, level=logging.INFO):
""" Fallback handler just for setup, not meant to be used from
configuration file because during wsgi query stdout/stderr
is forbidden.
"""
fhand = logging.StreamHandler(stream)
fform = logging.Formatter('%(asctime)s %(filename)s[%(process)d]: (%(levelname)s) %(message)s')
fhand.setFormatter(fform)
logger = get_clean_root_logger(level)
logger.addHandler(fhand)
def FileLogger(filename, level=logging.INFO):
fhand = logging.FileHandler(filename)
fform = logging.Formatter('%(asctime)s %(filename)s[%(process)d]: (%(levelname)s) %(message)s')
fhand.setFormatter(fform)
logger = get_clean_root_logger(level)
logger.addHandler(fhand)
logging.info("Initialized FileLogger(filename=\"%s\", \"%s\")" % (filename, level))
def SysLogger(socket="/dev/log", facility=logging.handlers.SysLogHandler.LOG_DAEMON, level=logging.INFO):
fhand = logging.handlers.SysLogHandler(address=socket, facility=facility)
fform = logging.Formatter('%(filename)s[%(process)d]: (%(levelname)s) %(message)s')
fhand.setFormatter(fform)
logger = get_clean_root_logger(level)
logger.addHandler(fhand)
logging.info("Initialized SysLogger(socket=\"%s\", facility=\"%s\", level=\"%s\")" % (socket, facility, level))
class Object(object):
def __str__(self):
return "%s()" % type(self).__name__
class NoAuthenticator(Object):
def __init__(self):
Object.__init__(self)
def authenticate (self, env):
return "anybody" # or None
def authorize(self, env, client, method, event, args):
return (client is not None)
class X509Authenticator(NoAuthenticator):
def __init__(self, db):
self.db = db
NoAuthenticator.__init__(self)
def __str__(self):
return "%s(db=%s)" % (type(self).__name__, type(self.db).__name__)
def get_cert_dns_names(self, pem):
cert = M2Crypto.X509.load_cert_string(pem)
subj = cert.get_subject()
commons = [n.get_data().as_text() for n in subj.get_entries_by_nid(subj.nid["CN"])]
ext = cert.get_ext("subjectAltName")
extstrs = [val.strip() for val in ext.get_value().split(",")]
altnames = [val[4:] for val in extstrs if val.startswith("DNS:")]
# bit of mangling to get rid of duplicates and leave commonname first
firstcommon = commons[0]
return [firstcommon] + list(set(altnames+commons) - set([firstcommon]))
def authenticate (self, env):
names = self.get_cert_dns_names(env["SSL_CLIENT_CERT"])
return self.db.get_client_by_name(names)
def authorize(self, env, client, method, event, args):
# Authorize for debug
if (method == 'getDebug'):
if not client["debug"]:
logging.info("Auth failed: client does not have debug enabled")
return None
return client
if method in ['getInfo', 'getEvents']:
return client
try:
identity = event['Node'][0]['Name'].lower()
except (KeyError, TypeError):
# Event does not bear valid Node attribute
logging.info("Auth failed: event does not bear valid Node attribute")
return None
try:
service = client["services"][identity]
except KeyError:
# We are unable to pair service in message to service in db
logging.info("Auth failed: '%s' from event not found in services for client %i" % (identity, client["id"]))
return None
client["service"] = service
# Authorize for sending events
if (method == "sendEvents"):
if not (service["write"] or service["test"]):
logging.info("Auth failed: service %i (%s) is not allowed to write or test" % (service["service_id"], identity))
return None
test = 'Test' in event.get('Category', [])
if not test:
logging.info("Auth failed: service %i (%s) does not send Test category in event" % (service["service_id"], identity))
return None
return client
class NoValidator(Object):
def check(self, event):
return []
class JSONSchemaValidator(NoValidator):
def __init__(self, filename=None):
self.path = filename or path.join(path.dirname(__file__), "idea.schema")
with open(self.path) as f:
self.schema = json.load(f)
self.validator = Draft4Validator(self.schema, format_checker=FormatChecker())
def __str__(self):
return "%s(filename=\"%s\")" % (type(self).__name__, self.path)
def check(self, event):
def sortkey(k):
""" Treat keys as lowercase, prefer keys with less path segments """
return (len(k.path), "/".join(str(k.path)).lower())
res = []
for error in sorted(self.validator.iter_errors(event), key=sortkey):
res.append(
"Validation error: key \"%s\", value \"%s\", expected - %s, error message - %s\n" % (
u"/".join(str(v) for v in error.path),
error.instance,
error.schema.get('description', 'no additional info'),
error.message))
return res
class MySQL(Object):
def __init__(self, host, user, password, dbname, port, catmap_filename, tagmap_filename):
self.host = host
self.user = user
self.password = password
self.dbname = dbname
self.port = port
self.catmap_filename = catmap_filename
self.tagmap_filename = tagmap_filename
with open(catmap_filename, "r") as catmap_fd:
self.catmap = json.load(catmap_fd)
self.catmap_other = self.catmap["Other"] # Catch error soon, avoid lookup later
with open(tagmap_filename, "r") as tagmap_fd:
self.tagmap = json.load(tagmap_fd)
self.tagmap_other = self.catmap["Other"] # Catch error soon, avoid lookup later
self.con = my.connect(host=self.host, user=self.user, passwd=self.password,
db=self.dbname, port=self.port, cursorclass=mycursors.DictCursor)
self.crs = self.con.cursor()
def __str__(self):
return "%s(host='%s', user='%s', dbname='%s', port=%d, catmap_filename=\"%s\", tagmap_filename=\"%s\")" % (
type(self).__name__, self.host, self.user, self.dbname, self.port, self.catmap_filename, self.tagmap_filename)
def get_client_by_name(self, name):
format_strings = ','.join(['%s'] * len(name))
self.crs.execute("SELECT cl.`id`, cl.`hostname`, s.`service`, s.`service_id`, s.`identity`, cl.`read`, s.`write`, s.`test`, cl.`debug` FROM `clients` cl LEFT JOIN `services` s ON cl.`id` = s.`client_id` WHERE cl.`valid` = 1 AND s.`valid` = 1 AND `hostname` IN (%s)" % format_strings, tuple(name))
rows = self.crs.fetchall()
if not rows:
return None
client = {}
for n in ["id", "hostname", "read", "debug"]:
client[n] = rows[0][n]
services = {}
for row in rows:
service = {}
for n in ["service", "service_id", "identity", "write", "test"]:
service[n] = row[n]
services[row["identity"]] = service
client["services"] = services
logging.debug("get_client_by_name: %s", str(client))
return client
def get_debug(self):
self.crs.execute("SELECT VERSION() AS VER")
row = self.crs.fetchone()
self.crs.execute("SHOW TABLE STATUS")
tablestat = self.crs.fetchall()
return {
"db": "MySQL",
"version": row["VER"],
"tables": tablestat
}
def generateDynamicQuery(self, section, query_string, variables, parent_cats = []):
variables_id = []
for v in variables:
try:
mapped_id = section[v]
except KeyError:
raise Error("Wrong tag or category used in query.", 422, method='getEvents',
exc=sys.exc_info(), detail={"key": v})
if mapped_id % 100:
variables_id.append(mapped_id)
else:
parent_cats.append(mapped_id)
format_strings = ','.join(['%s'] * len(variables_id))
temp_string = query_string % format_strings
return temp_string, variables_id
def fetch_events(self, client, id, count,
cat=None, nocat=None,
tag=None, notag=None,
group=None, nogroup=None):
logging.debug("fetch_events: id=%i, count=%i, cat=%s, nocat=%s, tag=%s, notag=%s, group=%s, nogroup=%s" % (id, count, str(cat), str(nocat), str(tag), str(notag), str(group), str(nogroup)))
if cat and nocat:
raise Error("Unrealizable conditions. Choose cat or nocat option.", 422, method='getEvents',
exc=sys.exc_info(), detail={'cat': cat, 'nocat' : nocat})
if tag and notag:
raise Error("Unrealizable conditions. Choose tag or notag option.", 422, method='getEvents',
exc=sys.exc_info(), detail={'tag': cat, 'notag' : nocat})
if group and nogroup:
raise Error("Unrealizable conditions. Choose group or nogroup option.", 422, method='getEvents',
exc=sys.exc_info(), detail={'tag': cat, 'notag' : nocat})
sqlwhere = []
sqlparams = []
sqlwhere.append("SELECT e.id, e.data FROM services s RIGHT JOIN events e ON s.service_id = e.service_id WHERE e.id > %s")
sqlparams.append(id or 0)
if cat or nocat:
not_op = "" if cat else "NOT"
parent_cats = []
sqltemp, sqlpar = self.generateDynamicQuery(self.catmap, "category_id %s IN (%%s)" % not_op, (cat or nocat), parent_cats)
for pcats in parent_cats:
sqltemp += " %s category_id DIV %s = 1 " % (("OR" if sqltemp else ""), pcats)
sqlwhere.append(" AND e.id IN (SELECT event_id FROM event_category_mapping WHERE %s)" % sqltemp)
sqlparams.extend(sqlpar)
if tag or notag:
not_op = "" if tag else "NOT"
sqltemp, sqlpar = self.generateDynamicQuery(self.tagmap, "tag_id %s IN (%%s)" % not_op, (tag or notag))
sqlwhere.append(" AND e.id IN (SELECT event_id FROM event_tag_mapping WHERE %s)" % sqltemp)
sqlparams.extend(sqlpar)
if group or nogroup:
not_op = "" if group else "NOT"
for identity in (group or nogroup):
sqlwhere.append(" AND s.identity %s LIKE %%s" % not_op)
sqlparams.append(identity + "%")
sqlwhere.append(" AND e.valid = 1 LIMIT %s")
sqlparams.append(count)
sqlwhere_string = "".join(sqlwhere)
logging.debug("fetch_events: query - %s" % sqlwhere_string)
logging.debug("fetch_events: params - %s", str(sqlparams))
self.crs.execute(sqlwhere_string, sqlparams)
row = self.crs.fetchall()
if row:
maxid = max(r['id'] for r in row)
else:
maxid = self.getLastEventId()
events = [json.loads(r["data"]) for r in row]
return {
"lastid": maxid,
"events": events
}
def store_event(self, client, event):
try:
self.crs.execute("INSERT INTO events (received,service_id,data) VALUES (NOW(), %s, %s)", (client["service"]["service_id"], json.dumps(event)))
lastid = self.crs.lastrowid
logging.debug("store_event: Last ID in events - %i" % lastid)
for cat in event.get('Category', ["Other"]):
cat_id = self.catmap.get(cat, self.catmap_other)
logging.debug("store_event: Category \"%s\" translated to %i" % (cat, cat_id))
self.crs.execute("INSERT INTO event_category_mapping (event_id,category_id) VALUES (%s, %s)", (lastid, cat_id))
try:
tags = event['Node'][0]['Tags']
except (KeyError, IndexError):
tags = []
for tag in tags:
tag_id = self.tagmap.get(tag, self.tagmap_other)
logging.debug("store_event: Tag \"%s\" translated to %i" % (tag, tag_id))
self.crs.execute("INSERT INTO event_tag_mapping (event_id,tag_id) VALUES (%s, %s)", (lastid, tag_id))
self.con.commit()
return []
except Exception as e:
self.con.rollback()
return [type(e).__name__ + ": " + str(e)]
def insertLastReceivedId(self, client, id):
logging.debug("insertLastReceivedId: id %i for client %i(%s)" % (id, client["id"], client["hostname"]))
self.crs.execute("INSERT INTO last_events(client_id, event_id, timestamp) VALUES(%s, %s, NOW())", (client["id"], id))
def getLastEventId(self):
self.crs.execute("SELECT MAX(id) as id FROM events")
row = self.crs.fetchone()
return row['id'] if row['id'] is not None else 0
def getLastReceivedId(self, client):
self.crs.execute("SELECT MAX(event_id) as id FROM last_events WHERE client_id = %s", client["id"])
row = self.crs.fetchone()
id = row['id'] if row is not None else 0
logging.debug("getLastReceivedId: id %i for client %i(%s)" % (id, client["id"], client["hostname"]))
return id
def expose(meth):
meth.exposed = True
return meth
class Server(Object):
def __init__(self, auth, handler):
self.auth = auth
self.handler = handler
def __str__(self):
return "%s(auth=%s, handler=%s)" % (type(self).__name__, type(self.auth).__name__, type(self.handler).__name__)
def sanitize_args(self, path, func, args, exclude=["self", "_env", "_client"]):
# silently remove internal args, these should never be used
# but if somebody does, we do not expose them by error message
intargs = set(args).intersection(exclude)
for a in intargs:
del args[a]
if intargs:
logging.info("%s called with internal args: %s" % (path, ", ".join(intargs)))
# silently remove surplus arguments - potential forward
# compatibility (unknown args will get ignored)
badargs = set(args)-set(func.func_code.co_varnames[0:func.func_code.co_argcount])
for a in badargs:
del args[a]
if badargs:
logging.info("%s called with superfluous args: %s" % (path, ", ".join(badargs)))
return args
def wsgi_app(self, environ, start_response, exc_info=None):
path = environ.get("PATH_INFO", "").lstrip("/")
output = ""
status = "200 OK"
headers = [('Content-type', 'application/json')]
exception = None
try:
try:
injson = environ['wsgi.input'].read()
except:
raise Error("Data read error.", 408, method=path, exc=sys.exc_info())
try:
method = getattr(self.handler, path)
method.exposed # dummy access to trigger AttributeError
except Exception:
raise Error("You've fallen of the cliff.", 404, method=path)
client = self.auth.authenticate(environ)
if not client:
raise Error("I'm watching. Authenticate.", 403, method=path)
try:
events = json.loads(injson) if injson else None
except Exception:
raise Error("Deserialization error", 400, method=path,
exc=sys.exc_info(), detail={"args": injson})
args = parse_qs(environ.get('QUERY_STRING', ""))
logging.debug("%s called with %s" % (path, str(args)))
if events:
args["events"] = events
args = self.sanitize_args(path, method, args)
result = method(_env=environ, _client=client, **args) # call requested method
try:
# 'default': takes care of non JSON serializable objects,
# which could (although shouldn't) appear in handler code
output = json.dumps(result, default=lambda v: str(v))
except Exception as e:
raise Error("Serialization error", 500, method=path,
exc=sys.exc_info(), detail={"args": str(result)})
except Error as e:
exception = e
except Exception as e:
exception = Error("Server exception", 500, method=path, exc=sys.exc_info())
if exception:
status = "%d %s" % (exception.error, exception.message)
result = exception.to_dict()
try:
output = json.dumps(result, default=lambda v: str(v))
except Exception as e:
# Here all bets are off, generate at least sane output
output = '{"error": %d, "message": "%s"}' % (
exception.error, exception.message)
logging.error(str(exception))
i = exception.info_str()
if i:
logging.info(i)
d = exception.debug_str()
if d:
logging.debug(d)
headers.append(('Content-Length', str(len(output))))
start_response(status, headers)
return [output]
__call__ = wsgi_app
class WardenHandler(Object):
def __init__(self, validator, db, auth,
send_events_limit=100000, get_events_limit=100000,
description=None):
self.auth = auth
self.db = db
self.validator = validator
self.send_events_limit = send_events_limit
self.get_events_limit = get_events_limit
self.description = description
def __str__(self):
return "%s(validator=%s, db=%s, send_events_limit=%s, get_events_limit=%s, description=\"%s\")" % (
type(self).__name__, type(self.validator).__name__, type(self.db).__name__,
self.get_events_limit, self.send_events_limit, self.description)
@expose
def getDebug(self, _env, _client):
auth = self.auth.authorize(_env, _client, 'getDebug', None, None)
if not auth:
raise Error("I'm watching. Authorize.", 403, method='getDebug', detail={"client": _client})
return {
"environment": _env,
"database": self.db.get_debug(),
"system": {
"uname": os.uname()
},
"process": {
"cwd": os.getcwdu(),
"pid": os.getpid(),
"ppid": os.getppid(),
"pgrp": os.getpgrp(),
"uid": os.getuid(),
"gid": os.getgid(),
"euid": os.geteuid(),
"egid": os.getegid(),
"groups": os.getgroups()
}
}
@expose
def getInfo(self, _env, _client):
auth = self.auth.authorize(_env, _client, 'getInfo', None, None)
if not auth:
raise Error("I'm watching. Authorize.", 403, method='getDebug', detail={"client": _client})
info = {
"version": VERSION,
"send_events_limit": self.send_events_limit,
"get_events_limit": self.get_events_limit
}
if self.description:
info["description"] = self.description
return info
@expose
def getEvents(self, _env, _client, id=None, count=None,
cat=None, nocat=None,
tag=None, notag=None,
group=None, nogroup=None):
auth = self.auth.authorize(_env, _client, 'getEvents', None, None)
if not auth:
raise Error("I'm watching. Authorize.", 403, method='getDebug', detail={"client": _client})
try:
id = int(id[0])
except (ValueError, TypeError, IndexError):
id = None
if id is None:
try:
id = self.db.getLastReceivedId(_client)
except Exception, e:
logging.info("getEvents: cannot getLastReceivedId - " + type(e).__name__ + ": " + e)
if id is None:
# First access, remember the guy and get him last event
id = self.db.getLastEventId()
self.db.insertLastReceivedId(_client, id)
return {
"lastid": id,
"events": []
}
try:
count = int(count[0])
except (ValueError, TypeError, IndexError):
count = 1
if self.get_events_limit:
count = min(count, self.get_events_limit)
res = self.db.fetch_events(_client, id, count, cat, nocat, tag, notag, group, nogroup)
logging.info("getEvents(%d, %d, %s, %s, %s, %s, %s, %s): sending %d events" % (
id, count, cat, nocat, tag, notag, group, nogroup, len(res["events"])))
self.db.insertLastReceivedId(_client, res['lastid'])
return res
@expose
def sendEvents(self, _env, _client, events=[]):
if not isinstance(events, list):
raise Error("List of events expected.", 400, method="sendEvents")
if len(events)>self.send_events_limit:
raise Error("Too much events in one batch.", 413, method="sendEvents",
detail={"limit": self.send_events_limit})
saved = 0
errs = {}
for i, event in enumerate(events):
ev_errs = []
auth_cl = self.auth.authorize(_env, _client, 'sendEvents', event, None)
if not auth_cl:
errs[i] = ["Client %i(%s) does not correspond with event Node info or is not allowed to write" % (_client["service"]["service_id"], _client["service"]["identity"])]
continue
v_errs = self.validator.check(event)
if v_errs:
errs[i] = v_errs
continue
db_errs = self.db.store_event(auth_cl, event)
if db_errs:
errs[i] = db_errs
continue
saved += 1
logging.info("sendEvents: Saved %i events" % saved)
if errs:
logging.info("sendEvents errors: \n%s\n" % str(errs))
return errs
def read_ini(path):
c = ConfigParser.RawConfigParser()
res = c.read(path)
if not res or not path in res:
# We don't have loggin yet, hopefully this will go into webserver log
raise Error("Unable to read config: %s" % path)
data = {}
for sect in c.sections():
for opts in c.options(sect):
lsect = sect.lower()
if not lsect in data:
data[lsect] = {}
data[lsect][opts] = c.get(sect, opts)
return data
def read_cfg(path):
with open(path, "r") as f:
stripcomments = "\n".join((l for l in f if not l.lstrip().startswith("#")))
conf = json.loads(stripcomments)
# Lowercase keys
conf = dict((sect.lower(), dict(
(subkey.lower(), val) for subkey, val in subsect.iteritems())
) for sect, subsect in conf.iteritems())
return conf
def fallback_wsgi(environ, start_response, exc_info=None):
# If server does not start, set up simple server, returning
# Warden JSON compliant error message
error=503
message="Server not running due to initialization error"
headers = [('Content-type', 'application/json')]
logline = "Error(%d): %s" % (error, message)
status = "%d %s" % (error, message)
output = '{"error": %d, "message": "%s"}' % (
error, message)
logging.critical(logline)
start_response(status, headers)
return [output]
def build_server(conf):
# Functions for validation and conversion of config values
def facility(name):
return int(getattr(logging.handlers.SysLogHandler, "LOG_" + name.upper()))
def loglevel(name):
return int(getattr(logging, name.upper()))
def natural(name):
num = int(name)
if num<1:
raise ValueError("Not a natural number")
return num
def filepath(name):
# Make paths relative to dir of this script
return path.join(path.dirname(__file__), name)
def objdef(name):
return objects[name.lower()]
obj = objdef # Draw into local namespace for init_obj
objects = {} # Already initialized objects
# List of sections and objects, configured by them
# First object in each object list is the default one, otherwise
# "type" keyword in section may be used to choose other
section_def = {
"log": ["FileLogger", "SysLogger"],
"db": ["MySQL"],
"auth": ["X509Authenticator", "NoAuthenticator"],
"validator": ["JSONSchemaValidator", "NoValidator"],
"handler": ["WardenHandler"],
"server": ["Server"]
}
# Object parameter conversions and defaults
param_def = {
"FileLogger": {
"filename": {"type": filepath, "default": path.join(path.dirname(__file__), path.splitext(path.split(__file__)[1])[0] + ".log")},
"level": {"type": loglevel, "default": "info"},
},
"SysLogger": {
"socket": {"type": filepath, "default": "/dev/log"},
"facility": {"type": facility, "default": "daemon"},
"level": {"type": loglevel, "default": "info"}
},
"NoAuthenticator": {},
"X509Authenticator": {
"db": {"type": obj, "default": "db"}
},
"NoValidator": {},
"JSONSchemaValidator": {
"filename": {"type": filepath, "default": path.join(path.dirname(__file__), "idea.schema")}
},
"MySQL": {
"host": {"type": str, "default": "localhost"},
"user": {"type": str, "default": "warden"},
"password": {"type": str, "default": ""},
"dbname": {"type": str, "default": "warden3"},
"port": {"type": natural, "default": 3306},
"catmap_filename": {"type": filepath, "default": path.join(path.dirname(__file__), "catmap_mysql.json")},
"tagmap_filename": {"type": filepath, "default": path.join(path.dirname(__file__), "tagmap_mysql.json")}
},
"WardenHandler": {
"validator": {"type": obj, "default": "validator"},
"db": {"type": obj, "default": "DB"},
"auth": {"type": obj, "default": "auth"},
"send_events_limit": {"type": natural, "default": 10000},
"get_events_limit": {"type": natural, "default": 10000},
"description": {"type": str, "default": ""}
},
"Server": {
"auth": {"type": obj, "default": "auth"},
"handler": {"type": obj, "default": "handler"}
}
}
def init_obj(sect_name):
config = conf.get(sect_name, {})
sect_name = sect_name.lower()
sect_def = section_def[sect_name]
#logging.debug("Testing %s" % sect_name)
try: # Object type defined?
objtype = config["type"]
del config["type"]
except KeyError: # No, fetch default object type for this section
objtype = sect_def[0]
else:
if not objtype in sect_def:
raise KeyError("Unknown type %s in section %s" % (objtype, sect_name))
params = param_def[objtype]
# No surplus parameters? Disallow also 'obj' attributes, these are only
# to provide default referenced section
for name in config:
if name not in params or (name in params and params[name]["type"] is objdef):
raise KeyError("Unknown key %s in section %s" % (name, sect_name))
# Process parameters
kwargs = {}
for name, definition in params.iteritems():
raw_val = config.get(name, definition["default"])
try:
val = definition["type"](raw_val)
except Exception:
raise KeyError("Bad value \"%s\" for %s in section %s" % (raw_val, name, sect_name))
kwargs[name] = val
cls = globals()[objtype] # get class/function type
try:
obj = cls(**kwargs) # run it
except Exception as e:
raise KeyError("Cannot initialize %s from section %s: %s" % (
objtype, sect_name, str(e)))
if isinstance(obj, Object):
# Log only objects here, functions must take care of themselves
logging.info("Initialized %s" % str(obj))
objects[sect_name] = obj
return obj
# Init logging with at least simple stderr StreamLogger
# Dunno if it's ok within wsgi, but we have no other choice, let's
# hope it at least ends up in webserver error log
StreamLogger()
try:
# Now try to init required objects
for o in ("log", "db", "auth", "validator", "handler", "server"):
init_obj(o)
except Exception as e:
logging.critical(str(e))
logging.debug("", exc_info=sys.exc_info())
return fallback_wsgi
logging.info("Ready to serve")
return objects["server"]
if __name__=="__main__":
# FIXME: just development stuff
srv = build_server(read_ini("warden3.cfg.wheezy-warden3"))