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 RPC_FAULT_CODE_CLIENT_ERROR = 1 # indistinguishable from app. error.
51 RPC_FAULT_CODE_APPLICATION_ERROR = 1
52 RPC_FAULT_CODE_WARNING = 2
53 RPC_FAULT_CODE_ACCESS_DENIED = 3
54 RPC_FAULT_CODE_ACCESS_ERROR = 4
56 # The new (6.1) versioned RPC paths.
57 XML_RPC_PATH = '/openerp/xmlrpc'
58 XML_RPC_PATH_1 = '/openerp/xmlrpc/1'
59 JSON_RPC_PATH = '/openerp/jsonrpc'
60 JSON_RPC_PATH_1 = '/openerp/jsonrpc/1'
62 def xmlrpc_return(start_response, service, method, params, legacy_exceptions=False):
64 Helper to call a service's method with some params, using a wsgi-supplied
65 ``start_response`` callback.
67 This is the place to look at to see the mapping between core exceptions
68 and XML-RPC fault codes.
70 # Map OpenERP core exceptions to XML-RPC fault codes. Specific exceptions
71 # defined in ``openerp.exceptions`` are mapped to specific fault codes;
72 # all the other exceptions are mapped to the generic
73 # RPC_FAULT_CODE_APPLICATION_ERROR value.
74 # This also mimics SimpleXMLRPCDispatcher._marshaled_dispatch() for
77 result = openerp.netsvc.dispatch_rpc(service, method, params)
78 response = xmlrpclib.dumps((result,), methodresponse=1, allow_none=False, encoding=None)
81 response = xmlrpc_handle_exception_legacy(e)
83 response = xmlrpc_handle_exception(e)
84 start_response("200 OK", [('Content-Type','text/xml'), ('Content-Length', str(len(response)))])
87 def xmlrpc_handle_exception(e):
88 if isinstance(e, openerp.osv.osv.except_osv): # legacy
89 fault = xmlrpclib.Fault(RPC_FAULT_CODE_WARNING, openerp.tools.ustr(e.value))
90 response = xmlrpclib.dumps(fault, allow_none=False, encoding=None)
91 elif isinstance(e, openerp.exceptions.Warning):
92 fault = xmlrpclib.Fault(RPC_FAULT_CODE_WARNING, str(e))
93 response = xmlrpclib.dumps(fault, allow_none=False, encoding=None)
94 elif isinstance (e, openerp.exceptions.AccessError):
95 fault = xmlrpclib.Fault(RPC_FAULT_CODE_ACCESS_ERROR, str(e))
96 response = xmlrpclib.dumps(fault, allow_none=False, encoding=None)
97 elif isinstance(e, openerp.exceptions.AccessDenied):
98 fault = xmlrpclib.Fault(RPC_FAULT_CODE_ACCESS_DENIED, str(e))
99 response = xmlrpclib.dumps(fault, allow_none=False, encoding=None)
100 elif isinstance(e, openerp.exceptions.DeferredException):
102 # Which one is the best ?
103 formatted_info = "".join(traceback.format_exception(*info))
104 #formatted_info = openerp.tools.exception_to_unicode(e) + '\n' + info
105 fault = xmlrpclib.Fault(RPC_FAULT_CODE_APPLICATION_ERROR, formatted_info)
106 response = xmlrpclib.dumps(fault, allow_none=False, encoding=None)
108 if hasattr(e, 'message') and e.message == 'AccessDenied': # legacy
109 fault = xmlrpclib.Fault(RPC_FAULT_CODE_ACCESS_DENIED, str(e))
110 response = xmlrpclib.dumps(fault, allow_none=False, encoding=None)
112 info = sys.exc_info()
113 # Which one is the best ?
114 formatted_info = "".join(traceback.format_exception(*info))
115 #formatted_info = openerp.tools.exception_to_unicode(e) + '\n' + info
116 fault = xmlrpclib.Fault(RPC_FAULT_CODE_APPLICATION_ERROR, formatted_info)
117 response = xmlrpclib.dumps(fault, allow_none=None, encoding=None)
120 def xmlrpc_handle_exception_legacy(e):
121 if isinstance(e, openerp.osv.osv.except_osv):
122 fault = xmlrpclib.Fault('warning -- ' + e.name + '\n\n' + e.value, '')
123 response = xmlrpclib.dumps(fault, allow_none=False, encoding=None)
124 elif isinstance(e, openerp.exceptions.Warning):
125 fault = xmlrpclib.Fault('warning -- Warning\n\n' + str(e), '')
126 response = xmlrpclib.dumps(fault, allow_none=False, encoding=None)
127 elif isinstance(e, openerp.exceptions.AccessError):
128 fault = xmlrpclib.Fault('warning -- AccessError\n\n' + str(e), '')
129 response = xmlrpclib.dumps(fault, allow_none=False, encoding=None)
130 elif isinstance(e, openerp.exceptions.AccessDenied):
131 fault = xmlrpclib.Fault('AccessDenied', str(e))
132 response = xmlrpclib.dumps(fault, allow_none=False, encoding=None)
133 elif isinstance(e, openerp.exceptions.DeferredException):
135 formatted_info = "".join(traceback.format_exception(*info))
136 fault = xmlrpclib.Fault(openerp.tools.ustr(e.message), formatted_info)
137 response = xmlrpclib.dumps(fault, allow_none=False, encoding=None)
139 info = sys.exc_info()
140 formatted_info = "".join(traceback.format_exception(*info))
141 fault = xmlrpclib.Fault(openerp.tools.exception_to_unicode(e), formatted_info)
142 response = xmlrpclib.dumps(fault, allow_none=None, encoding=None)
145 def wsgi_xmlrpc_1(environ, start_response):
146 """ The main OpenERP WSGI handler."""
147 if environ['REQUEST_METHOD'] == 'POST' and environ['PATH_INFO'].startswith(XML_RPC_PATH_1):
148 length = int(environ['CONTENT_LENGTH'])
149 data = environ['wsgi.input'].read(length)
151 params, method = xmlrpclib.loads(data)
153 path = environ['PATH_INFO'][len(XML_RPC_PATH_1):]
154 if path.startswith('/'): path = path[1:]
155 if path.endswith('/'): p = path[:-1]
156 path = path.split('/')
158 # All routes are hard-coded.
160 # No need for a db segment.
164 if service == 'common':
165 if method in ('server_version',):
167 return xmlrpc_return(start_response, service, method, params)
169 # A db segment must be given.
171 service, db_name = path
172 params = (db_name,) + params
174 return xmlrpc_return(start_response, service, method, params)
176 # A db segment and a model segment must be given.
177 elif len(path) == 3 and path[0] == 'model':
178 service, db_name, model_name = path
179 params = (db_name,) + params[:2] + (model_name,) + params[2:]
181 return xmlrpc_return(start_response, service, method, params)
183 # The body has been read, need to raise an exception (not return None).
184 fault = xmlrpclib.Fault(RPC_FAULT_CODE_CLIENT_ERROR, '')
185 response = xmlrpclib.dumps(fault, allow_none=None, encoding=None)
186 start_response("200 OK", [('Content-Type','text/xml'), ('Content-Length', str(len(response)))])
189 def wsgi_xmlrpc(environ, start_response):
190 """ WSGI handler to return the versions."""
191 if environ['REQUEST_METHOD'] == 'POST' and environ['PATH_INFO'].startswith(XML_RPC_PATH):
192 length = int(environ['CONTENT_LENGTH'])
193 data = environ['wsgi.input'].read(length)
195 params, method = xmlrpclib.loads(data)
197 path = environ['PATH_INFO'][len(XML_RPC_PATH):]
198 if path.startswith('/'): path = path[1:]
199 if path.endswith('/'): p = path[:-1]
200 path = path.split('/')
202 # All routes are hard-coded.
204 if len(path) == 1 and path[0] == '' and method in ('version',):
205 return xmlrpc_return(start_response, 'common', method, ())
207 # The body has been read, need to raise an exception (not return None).
208 fault = xmlrpclib.Fault(RPC_FAULT_CODE_CLIENT_ERROR, '')
209 response = xmlrpclib.dumps(fault, allow_none=None, encoding=None)
210 start_response("200 OK", [('Content-Type','text/xml'), ('Content-Length', str(len(response)))])
213 def wsgi_xmlrpc_legacy(environ, start_response):
214 if environ['REQUEST_METHOD'] == 'POST' and environ['PATH_INFO'].startswith('/xmlrpc/'):
215 length = int(environ['CONTENT_LENGTH'])
216 data = environ['wsgi.input'].read(length)
217 path = environ['PATH_INFO'][len('/xmlrpc/'):] # expected to be one of db, object, ...
219 params, method = xmlrpclib.loads(data)
220 return xmlrpc_return(start_response, path, method, params, True)
222 def wsgi_jsonrpc(environ, start_response):
225 def wsgi_webdav(environ, start_response):
226 pi = environ['PATH_INFO']
227 if environ['REQUEST_METHOD'] == 'OPTIONS' and pi in ['*','/']:
228 return return_options(environ, start_response)
229 elif pi.startswith('/webdav'):
230 http_dir = websrv_lib.find_http_service(pi)
232 path = pi[len(http_dir.path):]
233 if path.startswith('/'):
234 environ['PATH_INFO'] = path
236 environ['PATH_INFO'] = '/' + path
237 return http_to_wsgi(http_dir)(environ, start_response)
239 def return_options(environ, start_response):
240 # Microsoft specific header, see
241 # http://www.ibm.com/developerworks/rational/library/2089.html
242 if 'Microsoft' in environ.get('User-Agent', ''):
243 option = [('MS-Author-Via', 'DAV')]
246 options += [('DAV', '1 2'), ('Allow', 'GET HEAD PROPFIND OPTIONS REPORT')]
247 start_response("200 OK", [('Content-Length', str(0))] + options)
250 def http_to_wsgi(http_dir):
252 Turn a BaseHTTPRequestHandler into a WSGI entry point.
254 Actually the argument is not a bare BaseHTTPRequestHandler but is wrapped
255 (as a class, so it needs to be instanciated) in a HTTPDir.
257 This code is adapted from wbsrv_lib.MultiHTTPHandler._handle_one_foreign().
258 It is a temporary solution: the HTTP sub-handlers (in particular the
259 document_webdav addon) have to be WSGIfied.
261 def wsgi_handler(environ, start_response):
263 # Extract from the WSGI environment the necessary data.
264 scheme = environ['wsgi.url_scheme']
267 for key, value in environ.items():
268 if key.startswith('HTTP_'):
269 key = key[5:].replace('_', '-').title()
271 if key == 'CONTENT_LENGTH':
272 key = key.replace('_', '-').title()
274 if environ.get('Content-Type'):
275 headers['Content-Type'] = environ['Content-Type']
277 path = urllib.quote(environ.get('PATH_INFO', ''))
278 if environ.get('QUERY_STRING'):
279 path += '?' + environ['QUERY_STRING']
281 request_version = 'HTTP/1.1' # TODO
282 request_line = "%s %s %s\n" % (environ['REQUEST_METHOD'], path, request_version)
287 # Let's pretend we have a server to hand to the handler.
289 server.server_name = environ['SERVER_NAME']
290 server.server_port = int(environ['SERVER_PORT'])
292 # Initialize the underlying handler and associated auth. provider.
293 con = openerp.service.websrv_lib.noconnection(environ['wsgi.input'])
294 handler = http_dir.instanciate_handler(con, environ['REMOTE_ADDR'], server)
296 # Populate the handler as if it is called by a regular HTTP server
297 # and the request is already parsed.
298 handler.wfile = StringIO.StringIO()
299 handler.rfile = environ['wsgi.input']
300 handler.headers = headers
301 handler.command = environ['REQUEST_METHOD']
303 handler.request_version = request_version
304 handler.close_connection = 1
305 handler.raw_requestline = request_line
306 handler.requestline = request_line
308 # Handle authentication if there is an auth. provider associated to
310 if hasattr(handler, 'auth_provider'):
312 handler.auth_provider.checkRequest(handler, path)
313 except websrv_lib.AuthRequiredExc, ae:
314 # Darwin 9.x.x webdav clients will report "HTTP/1.0" to us, while they support (and need) the
315 # authorisation features of HTTP/1.1
316 if request_version != 'HTTP/1.1' and ('Darwin/9.' not in handler.headers.get('User-Agent', '')):
317 start_response("403 Forbidden", [])
319 start_response("401 Authorization required", [
320 ('WWW-Authenticate', '%s realm="%s"' % (ae.atype,ae.realm)),
321 # ('Connection', 'keep-alive'),
322 ('Content-Type', 'text/html'),
323 ('Content-Length', 4), # len(self.auth_required_msg)
325 return ['Blah'] # self.auth_required_msg
326 except websrv_lib.AuthRejectedExc,e:
327 start_response("403 %s" % (e.args[0],), [])
330 method_name = 'do_' + handler.command
332 # Support the OPTIONS method even when not provided directly by the
333 # handler. TODO I would prefer to remove it and fix the handler if
335 if not hasattr(handler, method_name):
336 if handler.command == 'OPTIONS':
337 return return_options(environ, start_response)
338 start_response("501 Unsupported method (%r)" % handler.command, [])
341 # Finally, call the handler's method.
343 method = getattr(handler, method_name)
345 # The DAV handler buffers its output and provides a _flush()
347 getattr(handler, '_flush', lambda: None)()
348 response = parse_http_response(handler.wfile.getvalue())
349 response_headers = response.getheaders()
350 body = response.read()
351 start_response(str(response.status) + ' ' + response.reason, response_headers)
353 except (websrv_lib.AuthRejectedExc, websrv_lib.AuthRequiredExc):
356 start_response("500 Internal error", [])
361 def parse_http_response(s):
362 """ Turn a HTTP response string into a httplib.HTTPResponse object."""
363 class DummySocket(StringIO.StringIO):
365 This is used to provide a StringIO to httplib.HTTPResponse
366 which, instead of taking a file object, expects a socket and
367 uses its makefile() method.
369 def makefile(self, *args, **kw):
371 response = httplib.HTTPResponse(DummySocket(s))
375 # WSGI handlers registered through the register_wsgi_handler() function below.
378 def register_wsgi_handler(handler):
379 """ Register a WSGI handler.
381 Handlers are tried in the order they are added. We might provide a way to
382 register a handler for specific routes later.
384 module_handlers.append(handler)
386 def application(environ, start_response):
387 """ WSGI entry point."""
389 # Try all handlers until one returns some result (i.e. not None).
397 for handler in wsgi_handlers:
398 result = handler(environ, start_response)
403 # We never returned from the loop.
404 response = 'No handler found.\n'
405 start_response('404 Not Found', [('Content-Type', 'text/plain'), ('Content-Length', str(len(response)))])
408 # The WSGI server, started by start_server(), stopped by stop_server().
412 """ Serve HTTP requests via werkzeug development server.
414 If werkzeug can not be imported, we fall back to wsgiref's simple_server.
416 Calling this function is blocking, you might want to call it in its own
422 # TODO Change the xmlrpc_* options to http_*
423 interface = config['xmlrpc_interface'] or '0.0.0.0'
424 port = config['xmlrpc_port']
426 import werkzeug.serving
427 httpd = werkzeug.serving.make_server(interface, port, application, threaded=True)
428 logging.getLogger('wsgi').info('HTTP service (werkzeug) running on %s:%s', interface, port)
429 except ImportError, e:
430 import wsgiref.simple_server
431 logging.getLogger('wsgi').warn('Werkzeug module unavailable, falling back to wsgiref.')
432 httpd = wsgiref.simple_server.make_server(interface, port, application)
433 logging.getLogger('wsgi').info('HTTP service (wsgiref) running on %s:%s', interface, port)
435 httpd.serve_forever()
438 """ Call serve() in its own thread.
440 The WSGI server can be shutdown with stop_server() below.
442 threading.Thread(target=openerp.wsgi.serve).start()
445 """ Initiate the shutdown of the WSGI server.
447 The server is supposed to have been started by start_server() above.
452 # Master process id, can be used for signaling.
455 # Application setup before we can spawn any worker process.
456 # This is suitable for e.g. gunicorn's on_starting hook.
457 def on_starting(server):
459 arbiter_pid = os.getpid() # TODO check if this is true even after replacing the executable
460 config = openerp.tools.config
461 #openerp.tools.cache = kill_workers_cache
462 openerp.netsvc.init_logger()
463 openerp.osv.osv.start_object_proxy()
464 openerp.service.web_services.start_web_services()
466 # Install our own signal handler on the master process.
467 def when_ready(server):
468 # Hijack gunicorn's SIGWINCH handling; we can choose another one.
469 signal.signal(signal.SIGWINCH, make_winch_handler(server))
471 # Our signal handler will signal a SGIQUIT to all workers.
472 def make_winch_handler(server):
473 def handle_winch(sig, fram):
474 server.kill_workers(signal.SIGQUIT) # This is gunicorn specific.
477 # Kill gracefuly the workers (e.g. because we want to clear their cache).
478 # This is done by signaling a SIGWINCH to the master process, so it can be
479 # called by the workers themselves.
482 os.kill(arbiter_pid, signal.SIGWINCH)
484 if e.errno == errno.ESRCH: # no such pid
488 class kill_workers_cache(openerp.tools.ormcache):
489 def clear(self, dbname, *args, **kwargs):
492 # vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4: