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requires a subclass of asynchat.async_chat that handles NOT_DONE_YET sentinel """ CONNECTION = re.compile ('Connection: (.*)', re.IGNORECASE) def __init__(self, request, callback): self.callback = callback self.request = request self.finished = False self.delay = float(callback.delay) def more(self): if self.finished: return '' try: try: value = self.callback() if value is NOT_DONE_YET: return NOT_DONE_YET except RPCError, err: value = xmlrpclib.Fault(err.code, err.text) body = xmlrpc_marshal(value) self.finished = True return self.getresponse(body) except: tb = traceback.format_exc() self.request.channel.server.logger.log( "XML-RPC response callback error", tb ) self.finished = True self.request.error(500) def getresponse(self, body): self.request['Content-Type'] = 'text/xml' self.request['Content-Length'] = len(body) self.request.push(body) connection = get_header(self.CONNECTION, self.request.header) close_it = 0 wrap_in_chunking = 0 if self.request.version == '1.0': if connection == 'keep-alive': if not self.request.has_key ('Content-Length'): close_it = 1 else: self.request['Connection'] = 'Keep-Alive' else: close_it = 1 elif self.request.version == '1.1': if connection == 'close': close_it = 1 elif not self.request.has_key ('Content-Length'): if self.request.has_key ('Transfer-Encoding'): if not self.request['Transfer-Encoding'] == 'chunked': close_it = 1 elif self.request.use_chunked: self.request['Transfer-Encoding'] = 'chunked' wrap_in_chunking = 1 else: close_it = 1 elif self.request.version is None: close_it = 1 outgoing_header = producers.simple_producer ( self.request.build_reply_header()) if close_it: self.request['Connection'] = 'close' if wrap_in_chunking: outgoing_producer = producers.chunked_producer ( producers.composite_producer (self.request.outgoing) ) # prepend the header outgoing_producer = producers.composite_producer( [outgoing_header, outgoing_producer] ) else: # prepend the header self.request.outgoing.insert(0, outgoing_header) outgoing_producer = producers.composite_producer ( self.request.outgoing) # apply a few final transformations to the output self.request.channel.push_with_producer ( # globbing gives us large packets producers.globbing_producer ( # hooking lets us log the number of bytes sent producers.hooked_producer ( outgoing_producer, self.request.log ) ) ) self.request.channel.current_request = None if close_it: self.request.channel.close_when_done() def xmlrpc_marshal(value): ismethodresponse = not isinstance(value, xmlrpclib.Fault) if ismethodresponse: if not isinstance(value, tuple): value = (value,) body = xmlrpclib.dumps(value, methodresponse=ismethodresponse) else: body = xmlrpclib.dumps(value) return body class SystemNamespaceRPCInterface: def __init__(self, namespaces): self.namespaces = {} for name, inst in namespaces: self.namespaces[name] = inst self.namespaces['system'] = self def _listMethods(self): methods = {} for ns_name in self.namespaces: namespace = self.namespaces[ns_name] for method_name in namespace.__class__.__dict__: # introspect; any methods that don't start with underscore # are published func = getattr(namespace, method_name) meth = getattr(func, 'im_func', None) if meth is not None: if not method_name.startswith('_'): sig = '%s.%s' % (ns_name, method_name) methods[sig] = str(func.__doc__) return methods def listMethods(self): """ Return an array listing the available method names @return array result An array of method names available (strings). """ methods = self._listMethods() keys = methods.keys() keys.sort() return keys def methodHelp(self, name): """ Return a string showing the method's documentation @param string name The name of the method. @return string result The documentation for the method name. """ methods = self._listMethods() for methodname in methods.keys(): if methodname == name: return methods[methodname] raise RPCError(Faults.SIGNATURE_UNSUPPORTED) def methodSignature(self, name): """ Return an array describing the method signature in the form [rtype, ptype, ptype...] where rtype is the return data type of the method, and ptypes are the parameter data types that the method accepts in method argument order. @param string name The name of the method. @return array result The result. """ methods = self._listMethods() for method in methods: if method == name: rtype = None ptypes = [] parsed = gettags(methods[method]) for thing in parsed: if thing[1] == 'return': # tag name rtype = thing[2] # datatype elif thing[1] == 'param': # tag name ptypes.append(thing[2]) # datatype if rtype is None: raise RPCError(Faults.SIGNATURE_UNSUPPORTED) return [rtype] + ptypes raise RPCError(Faults.SIGNATURE_UNSUPPORTED) def multicall(self, calls): """Process an array of calls, and return an array of results. Calls should be structs of the form {'methodName': string, 'params': array}. Each result will either be a single-item array containing the result value, or a struct of the form {'faultCode': int, 'faultString': string}. This is useful when you need to make lots of small calls without lots of round trips. @param array calls An array of call requests @return array result An array of results """ remaining_calls = calls[:] # [{'methodName':x, 'params':x}, ...] callbacks = [] # always empty or 1 callback function only results = [] # results of completed calls # args are only to fool scoping and are never passed by caller def multi(remaining_calls=remaining_calls, callbacks=callbacks, results=results): # if waiting on a callback, call it, then remove it if it's done if callbacks: try: value = callbacks[0]() except RPCError, exc: value = {'faultCode': exc.code, 'faultString': exc.text} except: info = sys.exc_info() errmsg = "%s:%s" % (info[0], info[1]) value = {'faultCode': Faults.FAILED, 'faultString': 'FAILED: ' + errmsg} if value is not NOT_DONE_YET: callbacks.pop(0) results.append(value) # if we don't have a callback now, pop calls and call them in # order until one returns a callback. while (not callbacks) and remaining_calls: call = remaining_calls.pop(0) name = call.get('methodName', None) params = call.get('params', []) try: if name is None: raise RPCError(Faults.INCORRECT_PARAMETERS, 'No methodName') if name == 'system.multicall': raise RPCError(Faults.INCORRECT_PARAMETERS, 'Recursive system.multicall forbidden') # make the call, may return a callback or not root = AttrDict(self.namespaces) value = traverse(root, name, params) except RPCError, exc: value = {'faultCode': exc.code, 'faultString': exc.text} except: info = sys.exc_info() errmsg = "%s:%s" % (info[0], info[1]) value = {'faultCode': Faults.FAILED, 'faultString': 'FAILED: ' + errmsg} if isinstance(value, types.FunctionType): callbacks.append(value) else: results.append(value) # we are done when there's no callback and no more calls queued if callbacks or remaining_calls: return NOT_DONE_YET else: return results multi.delay = 0.05 # optimization: multi() is called here instead of just returning # multi in case all calls complete and we can return with no delay. value = multi() if value is NOT_DONE_YET: return multi else: return value class AttrDict(dict): # hack to make a dict's getattr equivalent to its getitem def __getattr__(self, name): return self.get(name) class RootRPCInterface: def __init__(self, subinterfaces): for name, rpcinterface in subinterfaces: setattr(self, name, rpcinterface) def capped_int(value): i = int(value) if i < xmlrpclib.MININT: i = xmlrpclib.MININT elif i > xmlrpclib.MAXINT: i = xmlrpclib.MAXINT return i def make_datetime(text): return datetime.datetime( *time.strptime(text, "%Y%m%dT%H:%M:%S")[:6] ) class supervisor_xmlrpc_handler(xmlrpc_handler): path = '/RPC2' IDENT = 'Supervisor XML-RPC Handler' def __init__(self, supervisord, subinterfaces): self.rpcinterface = RootRPCInterface(subinterfaces) self.supervisord = supervisord if loads: self.loads = loads else: self.supervisord.options.logger.warn( 'cElementTree not installed, using slower XML parser for ' 'XML-RPC' ) self.loads = xmlrpclib.loads def match(self, request): return request.uri.startswith(self.path) def continue_request(self, data, request): logger = self.supervisord.options.logger try: try: params, method = self.loads(data) except: logger.error( 'XML-RPC request data %r is invalid: unmarshallable' % (data,) ) request.error(400) return # no in the request or name is an empty string if not method: logger.error( 'XML-RPC request data %r is invalid: no method name' % (data,) ) request.error(400) return # we allow xml-rpc clients that do not send empty # when there are no parameters for the method call if params is None: params = () try: logger.trace('XML-RPC method called: %s()' % method) value = self.call(method, params) logger.trace('XML-RPC method %s() returned successfully' % method) except RPCError, err: # turn RPCError reported by method into a Fault instance value = xmlrpclib.Fault(err.code, err.text) logger.trace('XML-RPC method %s() returned fault: [%d] %s' % ( method, err.code, err.text)) if isinstance(value, types.FunctionType): # returning a function from an RPC method implies that # this needs to be a deferred response (it needs to block). pushproducer = request.channel.push_with_producer pushproducer(DeferredXMLRPCResponse(request, value)) else: # if we get anything but a function, it implies that this # response doesn't need to be deferred, we can service it # right away. body = xmlrpc_marshal(value) request['Content-Type'] = 'text/xml' request['Content-Length'] = len(body) request.push(body) request.done() except: tb = traceback.format_exc() logger.critical( "Handling XML-RPC request with data %r raised an unexpected " "exception: %s" % (data, tb) ) # internal error, report as HTTP server error request.error(500) def call(self, method, params): return traverse(self.rpcinterface, method, params) def traverse(ob, method, params): dotted_parts = method.split('.') # security (CVE-2017-11610, don't allow object traversal) if len(dotted_parts) != 2: raise RPCError(Faults.UNKNOWN_METHOD) namespace, method = dotted_parts # security (don't allow methods that start with an underscore to # be called remotely) if method.startswith('_'): raise RPCError(Faults.UNKNOWN_METHOD) rpcinterface = getattr(ob, namespace, None) if rpcinterface is None: raise RPCError(Faults.UNKNOWN_METHOD) func = getattr(rpcinterface, method, None) if not isinstance(func, types.MethodType): raise RPCError(Faults.UNKNOWN_METHOD) try: return func(*params) except TypeError: raise RPCError(Faults.INCORRECT_PARAMETERS) class SupervisorTransport(xmlrpclib.Transport): """ Provides a Transport for xmlrpclib that uses httplib.HTTPConnection in order to support persistent connections. Also support basic auth and UNIX domain socket servers. """ connection = None _use_datetime = 0 # python 2.5 fwd compatibility def __init__(self, username=None, password=None, serverurl=None): self.username = username self.password = password self.verbose = False self.serverurl = serverurl if serverurl.startswith('http://'): type, uri = urllib.splittype(serverurl) host, path = urllib.splithost(uri) host, port = urllib.splitport(host) if port is None: port = 80 else: port = int(port) def get_connection(host=host, port=port): return httplib.HTTPConnection(host, port) self._get_connection = get_connection elif serverurl.startswith('unix://'): def get_connection(serverurl=serverurl): # we use 'localhost' here because domain names must be # < 64 chars (or we'd use the serverurl filename) conn = UnixStreamHTTPConnection('localhost') conn.socketfile = serverurl[7:] return conn self._get_connection = get_connection else: raise ValueError('Unknown protocol for serverurl %s' % serverurl) def request(self, host, handler, request_body, verbose=0): if not self.connection: self.connection = self._get_connection() self.headers = { "User-Agent" : self.user_agent, "Content-Type" : "text/xml", "Accept": "text/xml" } # basic auth if self.username is not None and self.password is not None: unencoded = "%s:%s" % (self.username, self.password) encoded = base64.encodestring(unencoded).replace('\n', '') self.headers["Authorization"] = "Basic %s" % encoded self.headers["Content-Length"] = str(len(request_body)) self.connection.request('POST', handler, request_body, self.headers) r = self.connection.getresponse() if r.status != 200: self.connection.close() self.connection = None raise xmlrpclib.ProtocolError(host + handler, r.status, r.reason, '' ) data = r.read() p, u = self.getparser() p.feed(data) p.close() return u.close() class UnixStreamHTTPConnection(httplib.HTTPConnection): def connect(self): self.sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) # we abuse the host parameter as the socketname self.sock.connect(self.socketfile) def gettags(comment): """ Parse documentation strings into JavaDoc-like tokens """ tags = [] tag = None datatype = None name = None tag_lineno = lineno = 0 tag_text = [] for line in comment.split('\n'): line = line.strip() if line.startswith("@"): tags.append((tag_lineno, tag, datatype, name, '\n'.join(tag_text))) parts = line.split(None, 3) if len(parts) == 1: datatype = '' name = '' tag_text = [] elif len(parts) == 2: datatype = parts[1] name = '' tag_text = [] elif len(parts) == 3: datatype = parts[1] name = parts[2] tag_text = [] elif len(parts) == 4: datatype = parts[1] name = parts[2] tag_text = [parts[3].lstrip()] tag = parts[0][1:] tag_lineno = lineno else: if line: tag_text.append(line) lineno = lineno + 1 tags.append((tag_lineno, tag, datatype, name, '\n'.join(tag_text))) return tags try: # Python 2.6 contains a version of cElementTree inside it. from xml.etree.ElementTree import iterparse except ImportError: try: # Failing that, try cElementTree instead. from cElementTree import iterparse except ImportError: iterparse = None if iterparse is not None: import datetime, time from base64 import decodestring unmarshallers = { "int": lambda x: int(x.text), "i4": lambda x: int(x.text), "boolean": lambda x: x.text == "1", "string": lambda x: x.text or "", "double": lambda x: float(x.text), "dateTime.iso8601": lambda x: make_datetime(x.text), "array": lambda x: x[0].text, "data": lambda x: [v.text for v in x], "struct": lambda x: dict([(k.text or "", v.text) for k, v in x]), "base64": lambda x: decodestring(x.text or ""), "param": lambda x: x[0].text, } def loads(data): params = method = None for action, elem in iterparse(StringIO(data)): unmarshal = unmarshallers.get(elem.tag) if unmarshal: data = unmarshal(elem) elem.clear() elem.text = data elif elem.tag == "value": try: data = elem[0].text except IndexError: data = elem.text or "" elem.clear() elem.text = data elif elem.tag == "methodName": method = elem.text elif elem.tag == "params": params = tuple([v.text for v in elem]) return params, method else: loads = None