"""twisted server for CubicWeb web instances
:organization: Logilab
:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
"""
__docformat__ = "restructuredtext en"
import sys
import os
import select
import hotshot
from time import mktime
from datetime import date, timedelta
from urlparse import urlsplit, urlunsplit
from twisted.application import strports
from twisted.internet import reactor, task, threads
from twisted.internet.defer import maybeDeferred
from twisted.web2 import channel, http, server, iweb
from twisted.web2 import static, resource, responsecode
from cubicweb import ObjectNotFound, CW_EVENT_MANAGER
from cubicweb.web import (AuthenticationError, NotFound, Redirect,
RemoteCallFailed, DirectResponse, StatusResponse,
ExplicitLogin)
from cubicweb.web.application import CubicWebPublisher
from cubicweb.etwist.request import CubicWebTwistedRequestAdapter
def daemonize():
# XXX unix specific
# XXX factorize w/ code in cw.server.server and cw.server.serverctl
# (start-repository command)
# See http://www.erlenstar.demon.co.uk/unix/faq_toc.html#TOC16
if os.fork(): # launch child and...
return 1
os.setsid()
if os.fork(): # launch child again.
return 1
# move to the root to avoit mount pb
os.chdir('/')
# set paranoid umask
os.umask(077)
null = os.open('/dev/null', os.O_RDWR)
for i in range(3):
try:
os.dup2(null, i)
except OSError, e:
if e.errno != errno.EBADF:
raise
os.close(null)
return None
def start_task(interval, func):
lc = task.LoopingCall(func)
# wait until interval has expired to actually start the task, else we have
# to wait all task to be finished for the server to be actually started
lc.start(interval, now=False)
def host_prefixed_baseurl(baseurl, host):
scheme, netloc, url, query, fragment = urlsplit(baseurl)
netloc_domain = '.' + '.'.join(netloc.split('.')[-2:])
if host.endswith(netloc_domain):
netloc = host
baseurl = urlunsplit((scheme, netloc, url, query, fragment))
return baseurl
class LongTimeExpiringFile(static.File):
"""overrides static.File and sets a far futre ``Expires`` date
on the resouce.
versions handling is done by serving static files by different
URLs for each version. For instance::
http://localhost:8080/data-2.48.2/cubicweb.css
http://localhost:8080/data-2.49.0/cubicweb.css
etc.
"""
def renderHTTP(self, request):
def setExpireHeader(response):
response = iweb.IResponse(response)
# Don't provide additional resource information to error responses
if response.code < 400:
# the HTTP RFC recommands not going further than 1 year ahead
expires = date.today() + timedelta(days=6*30)
response.headers.setHeader('Expires', mktime(expires.timetuple()))
return response
d = maybeDeferred(super(LongTimeExpiringFile, self).renderHTTP, request)
return d.addCallback(setExpireHeader)
class CubicWebRootResource(resource.PostableResource):
addSlash = False
def __init__(self, config, debug=None):
self.debugmode = debug
self.config = config
self.base_url = config['base-url'] or config.default_base_url()
assert self.base_url[-1] == '/'
self.https_url = config['https-url']
assert not self.https_url or self.https_url[-1] == '/'
# instantiate publisher here and not in init_publisher to get some
# checks done before daemonization (eg versions consistency)
self.appli = CubicWebPublisher(config, debug=self.debugmode)
self.versioned_datadir = 'data%s' % config.instance_md5_version()
def init_publisher(self):
config = self.config
# when we have an in-memory repository, clean unused sessions every XX
# seconds and properly shutdown the server
if config.repo_method == 'inmemory':
reactor.addSystemEventTrigger('before', 'shutdown',
self.shutdown_event)
# monkey patch start_looping_task to get proper reactor integration
#self.appli.repo.__class__.start_looping_tasks = start_looping_tasks
if config.pyro_enabled():
# if pyro is enabled, we have to register to the pyro name
# server, create a pyro daemon, and create a task to handle pyro
# requests
self.pyro_daemon = self.appli.repo.pyro_register()
self.pyro_listen_timeout = 0.02
self.appli.repo.looping_task(1, self.pyro_loop_event)
self.appli.repo.start_looping_tasks()
self.set_url_rewriter()
CW_EVENT_MANAGER.bind('after-registry-reload', self.set_url_rewriter)
def start_service(self):
config = self.config
interval = min(config['cleanup-session-time'] or 120,
config['cleanup-anonymous-session-time'] or 720) / 2.
start_task(interval, self.appli.session_handler.clean_sessions)
def set_url_rewriter(self):
self.url_rewriter = self.appli.vreg['components'].select_or_none('urlrewriter')
def shutdown_event(self):
"""callback fired when the server is shutting down to properly
clean opened sessions
"""
self.appli.repo.shutdown()
def pyro_loop_event(self):
"""listen for pyro events"""
try:
self.pyro_daemon.handleRequests(self.pyro_listen_timeout)
except select.error:
return
def locateChild(self, request, segments):
"""Indicate which resource to use to process down the URL's path"""
if segments:
if segments[0] == 'https':
segments = segments[1:]
if len(segments) >= 2:
if segments[0] in (self.versioned_datadir, 'data', 'static'):
# Anything in data/, static/ is treated as static files
if segments[0] == 'static':
# instance static directory
datadir = self.config.static_directory
elif segments[1] == 'fckeditor':
fckeditordir = self.config.ext_resources['FCKEDITOR_PATH']
return static.File(fckeditordir), segments[2:]
else:
# cube static data file
datadir = self.config.locate_resource(segments[1])
if datadir is None:
return None, []
self.info('static file %s from %s', segments[-1], datadir)
if segments[0] == 'data':
return static.File(str(datadir)), segments[1:]
else:
return LongTimeExpiringFile(datadir), segments[1:]
elif segments[0] == 'fckeditor':
fckeditordir = self.config.ext_resources['FCKEDITOR_PATH']
return static.File(fckeditordir), segments[1:]
# Otherwise we use this single resource
return self, ()
def render(self, request):
"""Render a page from the root resource"""
# reload modified files in debug mode
if self.debugmode:
self.appli.vreg.register_objects(self.config.vregistry_path())
if self.config['profile']: # default profiler don't trace threads
return self.render_request(request)
else:
return threads.deferToThread(self.render_request, request)
def render_request(self, request):
origpath = request.path
host = request.host
# dual http/https access handling: expect a rewrite rule to prepend
# 'https' to the path to detect https access
if origpath.split('/', 2)[1] == 'https':
origpath = origpath[6:]
request.uri = request.uri[6:]
https = True
baseurl = self.https_url or self.base_url
else:
https = False
baseurl = self.base_url
if self.config['use-request-subdomain']:
baseurl = host_prefixed_baseurl(baseurl, host)
self.warning('used baseurl is %s for this request', baseurl)
req = CubicWebTwistedRequestAdapter(request, self.appli.vreg, https, baseurl)
if req.authmode == 'http':
# activate realm-based auth
realm = self.config['realm']
req.set_header('WWW-Authenticate', [('Basic', {'realm' : realm })], raw=False)
try:
self.appli.connect(req)
except AuthenticationError:
return self.request_auth(req)
except Redirect, ex:
return self.redirect(req, ex.location)
if https and req.cnx.anonymous_connection:
# don't allow anonymous on https connection
return self.request_auth(req)
if self.url_rewriter is not None:
# XXX should occur before authentication?
try:
path = self.url_rewriter.rewrite(host, origpath, req)
except Redirect, ex:
return self.redirect(req, ex.location)
request.uri.replace(origpath, path, 1)
else:
path = origpath
if not path or path == "/":
path = 'view'
try:
result = self.appli.publish(path, req)
except DirectResponse, ex:
return ex.response
except StatusResponse, ex:
return http.Response(stream=ex.content, code=ex.status,
headers=req.headers_out or None)
except RemoteCallFailed, ex:
req.set_header('content-type', 'application/json')
return http.Response(stream=ex.dumps(),
code=responsecode.INTERNAL_SERVER_ERROR)
except NotFound:
result = self.appli.notfound_content(req)
return http.Response(stream=result, code=responsecode.NOT_FOUND,
headers=req.headers_out or None)
except ExplicitLogin: # must be before AuthenticationError
return self.request_auth(req)
except AuthenticationError:
if self.config['auth-mode'] == 'cookie':
# in cookie mode redirecting to the index view is enough :
# either anonymous connection is allowed and the page will
# be displayed or we'll be redirected to the login form
msg = req._('you have been logged out')
if req.https:
req._base_url = self.base_url
req.https = False
url = req.build_url('view', vid='index', __message=msg)
return self.redirect(req, url)
else:
# in http we have to request auth to flush current http auth
# information
return self.request_auth(req, loggedout=True)
except Redirect, ex:
return self.redirect(req, ex.location)
# request may be referenced by "onetime callback", so clear its entity
# cache to avoid memory usage
req.drop_entity_cache()
return http.Response(stream=result, code=responsecode.OK,
headers=req.headers_out or None)
def redirect(self, req, location):
req.headers_out.setHeader('location', str(location))
self.debug('redirecting to %s', location)
# 303 See other
return http.Response(code=303, headers=req.headers_out)
def request_auth(self, req, loggedout=False):
if self.https_url and req.base_url() != self.https_url:
req.headers_out.setHeader('location', self.https_url + 'login')
return http.Response(code=303, headers=req.headers_out)
if self.config['auth-mode'] == 'http':
code = responsecode.UNAUTHORIZED
else:
code = responsecode.FORBIDDEN
if loggedout:
if req.https:
req._base_url = self.base_url
req.https = False
content = self.appli.loggedout_content(req)
else:
content = self.appli.need_login_content(req)
return http.Response(code, req.headers_out, content)
from twisted.python import failure
from twisted.internet import defer
from twisted.web2 import fileupload
# XXX set max file size to 100Mo: put max upload size in the configuration
# line below for twisted >= 8.0, default param value for earlier version
resource.PostableResource.maxSize = 100*1024*1024
def parsePOSTData(request, maxMem=100*1024, maxFields=1024,
maxSize=100*1024*1024):
if request.stream.length == 0:
return defer.succeed(None)
ctype = request.headers.getHeader('content-type')
if ctype is None:
return defer.succeed(None)
def updateArgs(data):
args = data
request.args.update(args)
def updateArgsAndFiles(data):
args, files = data
request.args.update(args)
request.files.update(files)
def error(f):
f.trap(fileupload.MimeFormatError)
raise http.HTTPError(responsecode.BAD_REQUEST)
if ctype.mediaType == 'application' and ctype.mediaSubtype == 'x-www-form-urlencoded':
d = fileupload.parse_urlencoded(request.stream, keep_blank_values=True)
d.addCallbacks(updateArgs, error)
return d
elif ctype.mediaType == 'multipart' and ctype.mediaSubtype == 'form-data':
boundary = ctype.params.get('boundary')
if boundary is None:
return defer.fail(http.HTTPError(
http.StatusResponse(responsecode.BAD_REQUEST,
"Boundary not specified in Content-Type.")))
d = fileupload.parseMultipartFormData(request.stream, boundary,
maxMem, maxFields, maxSize)
d.addCallbacks(updateArgsAndFiles, error)
return d
else:
raise http.HTTPError(responsecode.BAD_REQUEST)
server.parsePOSTData = parsePOSTData
from logging import getLogger
from cubicweb import set_log_methods
set_log_methods(CubicWebRootResource, getLogger('cubicweb.twisted'))
def _gc_debug():
import gc
from pprint import pprint
from cubicweb.appobject import AppObject
gc.collect()
count = 0
acount = 0
ocount = {}
for obj in gc.get_objects():
if isinstance(obj, CubicWebTwistedRequestAdapter):
count += 1
elif isinstance(obj, AppObject):
acount += 1
else:
try:
ocount[obj.__class__] += 1
except KeyError:
ocount[obj.__class__] = 1
except AttributeError:
pass
print 'IN MEM REQUESTS', count
print 'IN MEM APPOBJECTS', acount
ocount = sorted(ocount.items(), key=lambda x: x[1], reverse=True)[:20]
pprint(ocount)
print 'UNREACHABLE', gc.garbage
def run(config, debug):
# create the site
root_resource = CubicWebRootResource(config, debug)
website = server.Site(root_resource)
# serve it via standard HTTP on port set in the configuration
port = config['port'] or 8080
reactor.listenTCP(port, channel.HTTPFactory(website))
logger = getLogger('cubicweb.twisted')
if not debug:
print 'instance starting in the background'
if daemonize():
return # child process
if config['pid-file']:
# ensure the directory where the pid-file should be set exists (for
# instance /var/run/cubicweb may be deleted on computer restart)
piddir = os.path.dirname(config['pid-file'])
if not os.path.exists(piddir):
os.makedirs(piddir)
file(config['pid-file'], 'w').write(str(os.getpid()))
root_resource.init_publisher() # before changing uid
if config['uid'] is not None:
try:
uid = int(config['uid'])
except ValueError:
from pwd import getpwnam
uid = getpwnam(config['uid']).pw_uid
os.setuid(uid)
root_resource.start_service()
logger.info('instance started on %s', root_resource.base_url)
if config['profile']:
prof = hotshot.Profile(config['profile'])
prof.runcall(reactor.run)
else:
reactor.run()