1 # -*- coding: utf-8 -*-
2 ##############################################################################
4 # OpenERP, Open Source Management Solution
5 # Copyright (C) 2011 OpenERP s.a. (<http://openerp.com>).
7 # This program is free software: you can redistribute it and/or modify
8 # it under the terms of the GNU Affero General Public License as
9 # published by the Free Software Foundation, either version 3 of the
10 # License, or (at your option) any later version.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU Affero General Public License for more details.
17 # You should have received a copy of the GNU Affero General Public License
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
20 ##############################################################################
22 """ WSGI stuffs (proof of concept for now)
24 This module offers a WSGI interface to OpenERP.
40 import openerp.tools.config as config
41 import openerp.service.websrv_lib as websrv_lib
43 def xmlrpc_return(start_response, service, method, params):
44 """ Helper to call a service's method with some params, using a
45 wsgi-supplied ``start_response`` callback."""
46 # This mimics SimpleXMLRPCDispatcher._marshaled_dispatch() for exception
49 result = openerp.netsvc.dispatch_rpc(service, method, params, None) # TODO auth
50 response = xmlrpclib.dumps((result,), methodresponse=1, allow_none=False, encoding=None)
51 except openerp.netsvc.OpenERPDispatcherException, e:
52 fault = xmlrpclib.Fault(openerp.tools.exception_to_unicode(e.exception), e.traceback)
53 response = xmlrpclib.dumps(fault, allow_none=False, encoding=None)
55 exc_type, exc_value, exc_tb = sys.exc_info()
56 fault = xmlrpclib.Fault(1, "%s:%s" % (exc_type, exc_value))
57 response = xmlrpclib.dumps(fault, allow_none=None, encoding=None)
58 start_response("200 OK", [('Content-Type','text/xml'), ('Content-Length', str(len(response)))])
61 def wsgi_xmlrpc(environ, start_response):
62 """ The main OpenERP WSGI handler."""
63 if environ['REQUEST_METHOD'] == 'POST' and environ['PATH_INFO'].startswith('/openerp/xmlrpc'):
64 length = int(environ['CONTENT_LENGTH'])
65 data = environ['wsgi.input'].read(length)
67 params, method = xmlrpclib.loads(data)
69 path = environ['PATH_INFO'][len('/openerp/xmlrpc'):]
70 if path.startswith('/'): path = path[1:]
71 if path.endswith('/'): p = path[:-1]
72 path = path.split('/')
74 # All routes are hard-coded. Need a way to register addons-supplied handlers.
76 # No need for a db segment.
80 if service == 'common':
81 if method in ('create_database', 'list', 'server_version'):
82 return xmlrpc_return(start_response, 'db', method, params)
84 return xmlrpc_return(start_response, 'common', method, params)
85 # A db segment must be given.
87 service, db_name = path
88 params = (db_name,) + params
90 if service == 'model':
91 return xmlrpc_return(start_response, 'object', method, params)
92 elif service == 'report':
93 return xmlrpc_return(start_response, 'report', method, params)
95 # TODO the body has been read, need to raise an exception (not return None).
97 def legacy_wsgi_xmlrpc(environ, start_response):
98 if environ['REQUEST_METHOD'] == 'POST' and environ['PATH_INFO'].startswith('/xmlrpc/'):
99 length = int(environ['CONTENT_LENGTH'])
100 data = environ['wsgi.input'].read(length)
101 path = environ['PATH_INFO'][len('/xmlrpc/'):] # expected to be one of db, object, ...
103 params, method = xmlrpclib.loads(data)
104 return xmlrpc_return(start_response, path, method, params)
106 def wsgi_jsonrpc(environ, start_response):
109 def wsgi_webdav(environ, start_response):
110 if environ['REQUEST_METHOD'] == 'OPTIONS' and environ['PATH_INFO'] == '*':
111 return return_options(environ, start_response)
113 http_dir = websrv_lib.find_http_service(environ['PATH_INFO'])
115 path = environ['PATH_INFO'][len(http_dir.path):]
116 if path.startswith('/'):
117 environ['PATH_INFO'] = path
119 environ['PATH_INFO'] = '/' + path
120 return http_to_wsgi(http_dir)(environ, start_response)
122 def return_options(environ, start_response):
123 # Microsoft specific header, see
124 # http://www.ibm.com/developerworks/rational/library/2089.html
125 if 'Microsoft' in environ.get('User-Agent', ''):
126 option = [('MS-Author-Via', 'DAV')]
129 options += [('DAV', '1 2'), ('Allow', 'GET HEAD PROPFIND OPTIONS REPORT')]
130 start_response("200 OK", [('Content-Length', str(0))] + options)
133 def http_to_wsgi(http_dir):
135 Turn a BaseHTTPRequestHandler into a WSGI entry point.
137 Actually the argument is not a bare BaseHTTPRequestHandler but is wrapped
138 (as a class, so it needs to be instanciated) in a HTTPDir.
140 This code is adapted from wbsrv_lib.MultiHTTPHandler._handle_one_foreign().
141 It is a temporary solution: the HTTP sub-handlers (in particular the
142 document_webdav addon) have to be WSGIfied.
144 def wsgi_handler(environ, start_response):
146 # Extract from the WSGI environment the necessary data.
147 scheme = environ['wsgi.url_scheme']
150 for key, value in environ.items():
151 if key.startswith('HTTP_'):
152 key = key[5:].replace('_', '-').title()
154 if key == 'CONTENT_LENGTH':
155 key = key.replace('_', '-').title()
157 if environ.get('Content-Type'):
158 headers['Content-Type'] = environ['Content-Type']
160 path = urllib.quote(environ.get('PATH_INFO', ''))
161 if environ.get('QUERY_STRING'):
162 path += '?' + environ['QUERY_STRING']
164 request_version = 'HTTP/1.1' # TODO
165 request_line = "%s %s %s\n" % (environ['REQUEST_METHOD'], path, request_version)
170 # Let's pretend we have a server to hand to the handler.
172 server.server_name = environ['SERVER_NAME']
173 server.server_port = int(environ['SERVER_PORT'])
174 con = openerp.service.websrv_lib.noconnection(environ['gunicorn.socket']) # None TODO
176 # Initialize the underlying handler and associated auth. provider.
177 handler = http_dir.instanciate_handler(openerp.service.websrv_lib.noconnection(con), environ['REMOTE_ADDR'], server)
179 # Populate the handler as if it is called by a regular HTTP server
180 # and the request is already parsed.
181 handler.wfile = StringIO.StringIO()
182 handler.rfile = environ['wsgi.input']
183 handler.headers = headers
184 handler.command = environ['REQUEST_METHOD']
186 handler.request_version = request_version
187 handler.close_connection = 1
188 handler.raw_requestline = request_line
189 handler.requestline = request_line
191 # Handle authentication if there is an auth. provider associated to
193 if hasattr(handler, 'auth_provider'):
195 handler.auth_provider.checkRequest(handler, path)
196 except websrv_lib.AuthRequiredExc, ae:
197 # Darwin 9.x.x webdav clients will report "HTTP/1.0" to us, while they support (and need) the
198 # authorisation features of HTTP/1.1
199 if request_version != 'HTTP/1.1' and ('Darwin/9.' not in handler.headers.get('User-Agent', '')):
200 print 'self.log_error("Cannot require auth at %s", self.request_version)'
201 start_response("403 Forbidden", [])
203 start_response("401 Authorization required", [
204 ('WWW-Authenticate', '%s realm="%s"' % (ae.atype,ae.realm)),
205 # ('Connection', 'keep-alive'),
206 ('Content-Type', 'text/html'),
207 ('Content-Length', 4), # len(self.auth_required_msg)
209 return ['Blah'] # self.auth_required_msg
210 except websrv_lib.AuthRejectedExc,e:
211 print '("Rejected auth: %s" % e.args[0])'
212 start_response("403 %s" % (e.args[0],), [])
215 method_name = 'do_' + handler.command
217 # Support the OPTIONS method even when not provided directly by the
218 # handler. TODO I would prefer to remove it and fix the handler if
220 if not hasattr(handler, method_name):
221 if handler.command == 'OPTIONS':
222 return return_options(environ, start_response)
223 start_response("501 Unsupported method (%r)" % handler.command, [])
226 # Finally, call the handler's method.
228 method = getattr(handler, method_name)
230 # The DAV handler buffers its output and provides a _flush()
232 getattr(handler, '_flush', lambda: None)()
233 response = parse_http_response(handler.wfile.getvalue())
234 response_headers = response.getheaders()
235 body = response.read()
236 start_response(str(response.status) + ' ' + response.reason, response_headers)
238 except (websrv_lib.AuthRejectedExc, websrv_lib.AuthRequiredExc):
241 start_response("500 Internal error", [])
246 def parse_http_response(s):
247 """ Turn a HTTP response string into a httplib.HTTPResponse object."""
248 class DummySocket(StringIO.StringIO):
250 This is used to provide a StringIO to httplib.HTTPResponse
251 which, instead of taking a file object, expects a socket and
252 uses its makefile() method.
254 def makefile(self, *args, **kw):
256 response = httplib.HTTPResponse(DummySocket(s))
260 # WSGI handlers registered through the register_wsgi_handler() function below.
263 def register_wsgi_handler(handler):
264 """ Register a WSGI handler.
266 Handlers are tried in the order they are added. We might provide a way to
267 register a handler for specific routes later.
269 module_handlers.append(handler)
271 def application(environ, start_response):
272 """ WSGI entry point."""
274 # Try all handlers until one returns some result (i.e. not None).
281 for handler in wsgi_handlers:
282 result = handler(environ, start_response)
287 # We never returned from the loop.
288 response = 'No handler found.\n'
289 start_response('404 Not Found', [('Content-Type', 'text/plain'), ('Content-Length', str(len(response)))])
293 """ Serve XMLRPC requests via werkzeug development server.
295 If werkzeug can not be imported, we fall back to wsgiref's simple_server.
297 Calling this function is blocking, you might want to call it in its own
301 # TODO Change the xmlrpc_port option to http_port.
303 import werkzeug.serving
304 httpd = werkzeug.serving.make_server('localhost',
305 config['xmlrpc_port'], application, threaded=True)
306 except ImportError, e:
307 import wsgiref.simple_server
308 logging.getLogger('wsgi').warn('Can not import werkzeug, '
309 'falling back to wsgiref.')
310 httpd = wsgiref.simple_server.make_server('localhost',
311 config['xmlrpc_port'], application)
313 httpd.serve_forever()
315 # Master process id, can be used for signaling.
318 # Application setup before we can spawn any worker process.
319 # This is suitable for e.g. gunicorn's on_starting hook.
320 def on_starting(server):
322 arbiter_pid = os.getpid() # TODO check if this is true even after replacing the executable
323 config = openerp.tools.config
324 #openerp.tools.cache = kill_workers_cache
325 openerp.netsvc.init_logger()
326 openerp.osv.osv.start_object_proxy()
327 openerp.service.web_services.start_web_services()
329 # Install our own signal handler on the master process.
330 def when_ready(server):
331 # Hijack gunicorn's SIGWINCH handling; we can choose another one.
332 signal.signal(signal.SIGWINCH, make_winch_handler(server))
334 # Our signal handler will signal a SGIQUIT to all workers.
335 def make_winch_handler(server):
336 def handle_winch(sig, fram):
337 server.kill_workers(signal.SIGQUIT) # This is gunicorn specific.
340 # Kill gracefuly the workers (e.g. because we want to clear their cache).
341 # This is done by signaling a SIGWINCH to the master process, so it can be
342 # called by the workers themselves.
345 os.kill(arbiter_pid, signal.SIGWINCH)
347 if e.errno == errno.ESRCH: # no such pid
351 class kill_workers_cache(openerp.tools.ormcache):
352 def clear(self, dbname, *args, **kwargs):
355 # vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4: