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.
42 import openerp.modules
43 import openerp.tools.config as config
44 import service.websrv_lib as websrv_lib
46 # XML-RPC fault codes. Some care must be taken when changing these: the
47 # constants are also defined client-side and must remain in sync.
48 # User code must use the exceptions defined in ``openerp.exceptions`` (not
49 # create directly ``xmlrpclib.Fault`` objects).
50 XML_RPC_FAULT_CODE_APPLICATION_ERROR = 1
51 XML_RPC_FAULT_CODE_DEFERRED_APPLICATION_ERROR = 2
52 XML_RPC_FAULT_CODE_ACCESS_DENIED = 3
53 XML_RPC_FAULT_CODE_WARNING = 4
54 XML_RPC_FAULT_CODE_ACCESS_ERROR = 5
56 def xmlrpc_return(start_response, service, method, params):
58 Helper to call a service's method with some params, using a wsgi-supplied
59 ``start_response`` callback.
61 This is the place to look at to see the mapping between core exceptions
62 and XML-RPC fault codes.
64 # Map OpenERP core exceptions to XML-RPC fault codes. Specific exceptions
65 # defined in ``openerp.exceptions`` are mapped to specific fault codes;
66 # all the other exceptions are mapped to the generic
67 # XML_RPC_FAULT_CODE_APPLICATION_ERROR value.
68 # This also mimics SimpleXMLRPCDispatcher._marshaled_dispatch() for
71 result = openerp.netsvc.dispatch_rpc(service, method, params)
72 response = xmlrpclib.dumps((result,), methodresponse=1, allow_none=False, encoding=None)
73 except openerp.exceptions.AccessError, e:
74 fault = xmlrpclib.Fault(XML_RPC_FAULT_CODE_ACCESS_ERROR, str(e))
75 response = xmlrpclib.dumps(fault, allow_none=False, encoding=None)
76 except openerp.exceptions.Warning, e:
77 fault = xmlrpclib.Fault(XML_RPC_FAULT_CODE_WARNING, str(e))
78 response = xmlrpclib.dumps(fault, allow_none=False, encoding=None)
79 except openerp.exceptions.AccessDenied, e:
80 fault = xmlrpclib.Fault(XML_RPC_FAULT_CODE_ACCESS_DENIED, str(e))
81 response = xmlrpclib.dumps(fault, allow_none=False, encoding=None)
82 except openerp.exceptions.DeferredException, e:
84 # Which one is the best ?
85 formatted_info = "".join(traceback.format_exception(*info))
86 #formatted_info = openerp.tools.exception_to_unicode(e) + '\n' + info
87 fault = xmlrpclib.Fault(XML_RPC_FAULT_CODE_DEFERRED_APPLICATION_ERROR, formatted_info)
88 response = xmlrpclib.dumps(fault, allow_none=False, encoding=None)
91 # Which one is the best ?
92 formatted_info = "".join(traceback.format_exception(*info))
93 #formatted_info = openerp.tools.exception_to_unicode(e) + '\n' + info
94 fault = xmlrpclib.Fault(XML_RPC_FAULT_CODE_APPLICATION_ERROR, formatted_info)
95 response = xmlrpclib.dumps(fault, allow_none=None, encoding=None)
96 start_response("200 OK", [('Content-Type','text/xml'), ('Content-Length', str(len(response)))])
99 def wsgi_xmlrpc(environ, start_response):
100 """ The main OpenERP WSGI handler."""
101 if environ['REQUEST_METHOD'] == 'POST' and environ['PATH_INFO'].startswith('/openerp/6.1/xmlrpc'):
102 length = int(environ['CONTENT_LENGTH'])
103 data = environ['wsgi.input'].read(length)
105 params, method = xmlrpclib.loads(data)
107 path = environ['PATH_INFO'][len('/openerp/6.1/xmlrpc'):]
108 if path.startswith('/'): path = path[1:]
109 if path.endswith('/'): p = path[:-1]
110 path = path.split('/')
112 # All routes are hard-coded.
114 # No need for a db segment.
118 if service == 'common':
119 if method in ('server_version',):
121 return xmlrpc_return(start_response, service, method, params)
123 # A db segment must be given.
125 service, db_name = path
126 params = (db_name,) + params
128 if service == 'model':
130 return xmlrpc_return(start_response, service, method, params)
132 # TODO the body has been read, need to raise an exception (not return None).
134 def legacy_wsgi_xmlrpc(environ, start_response):
135 if environ['REQUEST_METHOD'] == 'POST' and environ['PATH_INFO'].startswith('/xmlrpc/'):
136 length = int(environ['CONTENT_LENGTH'])
137 data = environ['wsgi.input'].read(length)
138 path = environ['PATH_INFO'][len('/xmlrpc/'):] # expected to be one of db, object, ...
140 params, method = xmlrpclib.loads(data)
141 return xmlrpc_return(start_response, path, method, params)
143 def wsgi_jsonrpc(environ, start_response):
146 def wsgi_webdav(environ, start_response):
147 if environ['REQUEST_METHOD'] == 'OPTIONS' and environ['PATH_INFO'] == '*':
148 return return_options(environ, start_response)
150 http_dir = websrv_lib.find_http_service(environ['PATH_INFO'])
152 path = environ['PATH_INFO'][len(http_dir.path):]
153 if path.startswith('/'):
154 environ['PATH_INFO'] = path
156 environ['PATH_INFO'] = '/' + path
157 return http_to_wsgi(http_dir)(environ, start_response)
159 def return_options(environ, start_response):
160 # Microsoft specific header, see
161 # http://www.ibm.com/developerworks/rational/library/2089.html
162 if 'Microsoft' in environ.get('User-Agent', ''):
163 option = [('MS-Author-Via', 'DAV')]
166 options += [('DAV', '1 2'), ('Allow', 'GET HEAD PROPFIND OPTIONS REPORT')]
167 start_response("200 OK", [('Content-Length', str(0))] + options)
170 def http_to_wsgi(http_dir):
172 Turn a BaseHTTPRequestHandler into a WSGI entry point.
174 Actually the argument is not a bare BaseHTTPRequestHandler but is wrapped
175 (as a class, so it needs to be instanciated) in a HTTPDir.
177 This code is adapted from wbsrv_lib.MultiHTTPHandler._handle_one_foreign().
178 It is a temporary solution: the HTTP sub-handlers (in particular the
179 document_webdav addon) have to be WSGIfied.
181 def wsgi_handler(environ, start_response):
183 # Extract from the WSGI environment the necessary data.
184 scheme = environ['wsgi.url_scheme']
187 for key, value in environ.items():
188 if key.startswith('HTTP_'):
189 key = key[5:].replace('_', '-').title()
191 if key == 'CONTENT_LENGTH':
192 key = key.replace('_', '-').title()
194 if environ.get('Content-Type'):
195 headers['Content-Type'] = environ['Content-Type']
197 path = urllib.quote(environ.get('PATH_INFO', ''))
198 if environ.get('QUERY_STRING'):
199 path += '?' + environ['QUERY_STRING']
201 request_version = 'HTTP/1.1' # TODO
202 request_line = "%s %s %s\n" % (environ['REQUEST_METHOD'], path, request_version)
207 # Let's pretend we have a server to hand to the handler.
209 server.server_name = environ['SERVER_NAME']
210 server.server_port = int(environ['SERVER_PORT'])
212 # Initialize the underlying handler and associated auth. provider.
213 con = openerp.service.websrv_lib.noconnection(environ['wsgi.input'])
214 handler = http_dir.instanciate_handler(con, environ['REMOTE_ADDR'], server)
216 # Populate the handler as if it is called by a regular HTTP server
217 # and the request is already parsed.
218 handler.wfile = StringIO.StringIO()
219 handler.rfile = environ['wsgi.input']
220 handler.headers = headers
221 handler.command = environ['REQUEST_METHOD']
223 handler.request_version = request_version
224 handler.close_connection = 1
225 handler.raw_requestline = request_line
226 handler.requestline = request_line
228 # Handle authentication if there is an auth. provider associated to
230 if hasattr(handler, 'auth_provider'):
232 handler.auth_provider.checkRequest(handler, path)
233 except websrv_lib.AuthRequiredExc, ae:
234 # Darwin 9.x.x webdav clients will report "HTTP/1.0" to us, while they support (and need) the
235 # authorisation features of HTTP/1.1
236 if request_version != 'HTTP/1.1' and ('Darwin/9.' not in handler.headers.get('User-Agent', '')):
237 start_response("403 Forbidden", [])
239 start_response("401 Authorization required", [
240 ('WWW-Authenticate', '%s realm="%s"' % (ae.atype,ae.realm)),
241 # ('Connection', 'keep-alive'),
242 ('Content-Type', 'text/html'),
243 ('Content-Length', 4), # len(self.auth_required_msg)
245 return ['Blah'] # self.auth_required_msg
246 except websrv_lib.AuthRejectedExc,e:
247 start_response("403 %s" % (e.args[0],), [])
250 method_name = 'do_' + handler.command
252 # Support the OPTIONS method even when not provided directly by the
253 # handler. TODO I would prefer to remove it and fix the handler if
255 if not hasattr(handler, method_name):
256 if handler.command == 'OPTIONS':
257 return return_options(environ, start_response)
258 start_response("501 Unsupported method (%r)" % handler.command, [])
261 # Finally, call the handler's method.
263 method = getattr(handler, method_name)
265 # The DAV handler buffers its output and provides a _flush()
267 getattr(handler, '_flush', lambda: None)()
268 response = parse_http_response(handler.wfile.getvalue())
269 response_headers = response.getheaders()
270 body = response.read()
271 start_response(str(response.status) + ' ' + response.reason, response_headers)
273 except (websrv_lib.AuthRejectedExc, websrv_lib.AuthRequiredExc):
276 start_response("500 Internal error", [])
281 def parse_http_response(s):
282 """ Turn a HTTP response string into a httplib.HTTPResponse object."""
283 class DummySocket(StringIO.StringIO):
285 This is used to provide a StringIO to httplib.HTTPResponse
286 which, instead of taking a file object, expects a socket and
287 uses its makefile() method.
289 def makefile(self, *args, **kw):
291 response = httplib.HTTPResponse(DummySocket(s))
295 # WSGI handlers registered through the register_wsgi_handler() function below.
298 def register_wsgi_handler(handler):
299 """ Register a WSGI handler.
301 Handlers are tried in the order they are added. We might provide a way to
302 register a handler for specific routes later.
304 module_handlers.append(handler)
306 def application(environ, start_response):
307 """ WSGI entry point."""
309 # Try all handlers until one returns some result (i.e. not None).
316 for handler in wsgi_handlers:
317 result = handler(environ, start_response)
322 # We never returned from the loop.
323 response = 'No handler found.\n'
324 start_response('404 Not Found', [('Content-Type', 'text/plain'), ('Content-Length', str(len(response)))])
327 # The WSGI server, started by start_server(), stopped by stop_server().
331 """ Serve HTTP requests via werkzeug development server.
333 If werkzeug can not be imported, we fall back to wsgiref's simple_server.
335 Calling this function is blocking, you might want to call it in its own
341 # TODO Change the xmlrpc_* options to http_*
342 interface = config['xmlrpc_interface'] or '0.0.0.0'
343 port = config['xmlrpc_port']
345 import werkzeug.serving
346 httpd = werkzeug.serving.make_server(interface, port, application, threaded=True)
347 logging.getLogger('wsgi').info('HTTP service (werkzeug) running on %s:%s', interface, port)
348 except ImportError, e:
349 import wsgiref.simple_server
350 logging.getLogger('wsgi').warn('Werkzeug module unavailable, falling back to wsgiref.')
351 httpd = wsgiref.simple_server.make_server(interface, port, application)
352 logging.getLogger('wsgi').info('HTTP service (wsgiref) running on %s:%s', interface, port)
354 httpd.serve_forever()
357 """ Call serve() in its own thread.
359 The WSGI server can be shutdown with stop_server() below.
361 threading.Thread(target=openerp.wsgi.serve).start()
364 """ Initiate the shutdown of the WSGI server.
366 The server is supposed to have been started by start_server() above.
371 # Master process id, can be used for signaling.
374 # Application setup before we can spawn any worker process.
375 # This is suitable for e.g. gunicorn's on_starting hook.
376 def on_starting(server):
378 arbiter_pid = os.getpid() # TODO check if this is true even after replacing the executable
379 config = openerp.tools.config
380 #openerp.tools.cache = kill_workers_cache
381 openerp.netsvc.init_logger()
382 openerp.osv.osv.start_object_proxy()
383 openerp.service.web_services.start_web_services()
385 # Install our own signal handler on the master process.
386 def when_ready(server):
387 # Hijack gunicorn's SIGWINCH handling; we can choose another one.
388 signal.signal(signal.SIGWINCH, make_winch_handler(server))
390 # Our signal handler will signal a SGIQUIT to all workers.
391 def make_winch_handler(server):
392 def handle_winch(sig, fram):
393 server.kill_workers(signal.SIGQUIT) # This is gunicorn specific.
396 # Kill gracefuly the workers (e.g. because we want to clear their cache).
397 # This is done by signaling a SIGWINCH to the master process, so it can be
398 # called by the workers themselves.
401 os.kill(arbiter_pid, signal.SIGWINCH)
403 if e.errno == errno.ESRCH: # no such pid
407 class kill_workers_cache(openerp.tools.ormcache):
408 def clear(self, dbname, *args, **kwargs):
411 # vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4: