"""twisted server for CubicWeb web applications
:organization: Logilab
:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
"""
__docformat__ = "restructuredtext en"
import sys
import select
from time import mktime
from datetime import date, timedelta
from twisted.application import service, 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
from cubicweb.web import (AuthenticationError, NotFound, Redirect,
RemoteCallFailed, DirectResponse, StatusResponse,
ExplicitLogin)
from cubicweb.web.application import CubicWebPublisher
from cubicweb.etwist.request import CubicWebTwistedRequestAdapter
def start_task(interval, func):
lc = task.LoopingCall(func)
lc.start(interval)
def start_looping_tasks(repo):
for interval, func in repo._looping_tasks:
repo.info('starting twisted task %s with interval %.2fs',
func.__name__, interval)
def catch_error_func(repo=repo, func=func):
try:
func()
except:
repo.exception('error in looping task')
start_task(interval, catch_error_func)
# ensure no tasks will be further added
repo._looping_tasks = ()
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.appli = CubicWebPublisher(config, debug=debug)
self.debugmode = debug
self.config = config
self.base_url = config['base-url'] or config.default_base_url()
self.versioned_datadir = 'data%s' % config.instance_md5_version()
assert self.base_url[-1] == '/'
self.https_url = config['https-url']
assert not self.https_url or self.https_url[-1] == '/'
# 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
start_task(1, self.pyro_loop_event)
self.appli.repo.start_looping_tasks()
try:
self.url_rewriter = self.appli.vreg.select_component('urlrewriter')
except ObjectNotFound:
self.url_rewriter = None
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 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
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 (only in development or debug mode)
if self.config.mode == 'dev' or 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
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)
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)
if not result:
# no result, something went wrong...
self.error('no data (%s)', req)
# 500 Internal server error
return self.redirect(req, req.build_url('error'))
# 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)
# This part gets run when you run this file via: "twistd -noy demo.py"
def main(appid, cfgname):
"""Starts an cubicweb twisted server for an application
appid: application's identifier
cfgname: name of the configuration to use (twisted or all-in-one)
"""
from cubicweb.cwconfig import CubicWebConfiguration
from cubicweb.etwist import twconfig # trigger configuration registration
config = CubicWebConfiguration.config_for(appid, cfgname)
# XXX why calling init_available_cubes here ?
config.init_available_cubes()
# create the site and application objects
if '-n' in sys.argv: # debug mode
cubicweb = CubicWebRootResource(config, debug=True)
else:
cubicweb = CubicWebRootResource(config)
#toplevel = vhost.VHostURIRewrite(base_url, cubicweb)
toplevel = cubicweb
website = server.Site(toplevel)
application = service.Application("cubicweb")
# serve it via standard HTTP on port set in the configuration
s = strports.service('tcp:%04d' % (config['port'] or 8080),
channel.HTTPFactory(website))
s.setServiceParent(application)
return application
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.vregistry import VObject
gc.collect()
count = 0
acount = 0
ocount = {}
for obj in gc.get_objects():
if isinstance(obj, CubicWebTwistedRequestAdapter):
count += 1
elif isinstance(obj, VObject):
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