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#
# XML-RPC CLIENT LIBRARY
# $Id$
#
# an XML-RPC client interface for Python.
#
# the marshalling and response parser code can also be used to
# implement XML-RPC servers.
#
# Notes:
# this version is designed to work with Python 2.1 or newer.
#
# History:
# 1999-01-14 fl Created
# 1999-01-15 fl Changed dateTime to use localtime
# 1999-01-16 fl Added Binary/base64 element, default to RPC2 service
# 1999-01-19 fl Fixed array data element (from Skip Montanaro)
# 1999-01-21 fl Fixed dateTime constructor, etc.
# 1999-02-02 fl Added fault handling, handle empty sequences, etc.
# 1999-02-10 fl Fixed problem with empty responses (from Skip Montanaro)
# 1999-06-20 fl Speed improvements, pluggable parsers/transports (0.9.8)
# 2000-11-28 fl Changed boolean to check the truth value of its argument
# 2001-02-24 fl Added encoding/Unicode/SafeTransport patches
# 2001-02-26 fl Added compare support to wrappers (0.9.9/1.0b1)
# 2001-03-28 fl Make sure response tuple is a singleton
# 2001-03-29 fl Don't require empty params element (from Nicholas Riley)
# 2001-06-10 fl Folded in _xmlrpclib accelerator support (1.0b2)
# 2001-08-20 fl Base xmlrpclib.Error on built-in Exception (from Paul Prescod)
# 2001-09-03 fl Allow Transport subclass to override getparser
# 2001-09-10 fl Lazy import of urllib, cgi, xmllib (20x import speedup)
# 2001-10-01 fl Remove containers from memo cache when done with them
# 2001-10-01 fl Use faster escape method (80% dumps speedup)
# 2001-10-02 fl More dumps microtuning
# 2001-10-04 fl Make sure import expat gets a parser (from Guido van Rossum)
# 2001-10-10 sm Allow long ints to be passed as ints if they don't overflow
# 2001-10-17 sm Test for int and long overflow (allows use on 64-bit systems)
# 2001-11-12 fl Use repr() to marshal doubles (from Paul Felix)
# 2002-03-17 fl Avoid buffered read when possible (from James Rucker)
# 2002-04-07 fl Added pythondoc comments
# 2002-04-16 fl Added __str__ methods to datetime/binary wrappers
# 2002-05-15 fl Added error constants (from Andrew Kuchling)
# 2002-06-27 fl Merged with Python CVS version
# 2002-10-22 fl Added basic authentication (based on code from Phillip Eby)
# 2003-01-22 sm Add support for the bool type
# 2003-02-27 gvr Remove apply calls
# 2003-04-24 sm Use cStringIO if available
# 2003-04-25 ak Add support for nil
# 2003-06-15 gn Add support for time.struct_time
# 2003-07-12 gp Correct marshalling of Faults
# 2003-10-31 mvl Add multicall support
# 2004-08-20 mvl Bump minimum supported Python version to 2.1
# 2014-12-02 ch/doko Add workaround for gzip bomb vulnerability
#
# Copyright (c) 1999-2002 by Secret Labs AB.
# Copyright (c) 1999-2002 by Fredrik Lundh.
#
# info@pythonware.com
# http://www.pythonware.com
#
# --------------------------------------------------------------------
# The XML-RPC client interface is
#
# Copyright (c) 1999-2002 by Secret Labs AB
# Copyright (c) 1999-2002 by Fredrik Lundh
#
# By obtaining, using, and/or copying this software and/or its
# associated documentation, you agree that you have read, understood,
# and will comply with the following terms and conditions:
#
# Permission to use, copy, modify, and distribute this software and
# its associated documentation for any purpose and without fee is
# hereby granted, provided that the above copyright notice appears in
# all copies, and that both that copyright notice and this permission
# notice appear in supporting documentation, and that the name of
# Secret Labs AB or the author not be used in advertising or publicity
# pertaining to distribution of the software without specific, written
# prior permission.
#
# SECRET LABS AB AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD
# TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANT-
# ABILITY AND FITNESS. IN NO EVENT SHALL SECRET LABS AB OR THE AUTHOR
# BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
# DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
# WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
# ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
# OF THIS SOFTWARE.
# --------------------------------------------------------------------
"""
An XML-RPC client interface for Python.
The marshalling and response parser code can also be used to
implement XML-RPC servers.
Exported exceptions:
Error Base class for client errors
ProtocolError Indicates an HTTP protocol error
ResponseError Indicates a broken response package
Fault Indicates an XML-RPC fault package
Exported classes:
ServerProxy Represents a logical connection to an XML-RPC server
MultiCall Executor of boxcared xmlrpc requests
DateTime dateTime wrapper for an ISO 8601 string or time tuple or
localtime integer value to generate a "dateTime.iso8601"
XML-RPC value
Binary binary data wrapper
Marshaller Generate an XML-RPC params chunk from a Python data structure
Unmarshaller Unmarshal an XML-RPC response from incoming XML event message
Transport Handles an HTTP transaction to an XML-RPC server
SafeTransport Handles an HTTPS transaction to an XML-RPC server
Exported constants:
(none)
Exported functions:
getparser Create instance of the fastest available parser & attach
to an unmarshalling object
dumps Convert an argument tuple or a Fault instance to an XML-RPC
request (or response, if the methodresponse option is used).
loads Convert an XML-RPC packet to unmarshalled data plus a method
name (None if not present).
"""
import base64
import sys
import time
from datetime import datetime
from decimal import Decimal
import http.client
import urllib.parse
from xml.parsers import expat
import errno
from io import BytesIO
try:
import gzip
except ImportError:
gzip = None #python can be built without zlib/gzip support
# --------------------------------------------------------------------
# Internal stuff
def escape(s):
s = s.replace("&", "&")
s = s.replace("<", "<")
return s.replace(">", ">",)
# used in User-Agent header sent
__version__ = '%d.%d' % sys.version_info[:2]
# xmlrpc integer limits
MAXINT = 2**31-1
MININT = -2**31
# --------------------------------------------------------------------
# Error constants (from Dan Libby's specification at
# http://xmlrpc-epi.sourceforge.net/specs/rfc.fault_codes.php)
# Ranges of errors
PARSE_ERROR = -32700
SERVER_ERROR = -32600
APPLICATION_ERROR = -32500
SYSTEM_ERROR = -32400
TRANSPORT_ERROR = -32300
# Specific errors
NOT_WELLFORMED_ERROR = -32700
UNSUPPORTED_ENCODING = -32701
INVALID_ENCODING_CHAR = -32702
INVALID_XMLRPC = -32600
METHOD_NOT_FOUND = -32601
INVALID_METHOD_PARAMS = -32602
INTERNAL_ERROR = -32603
# --------------------------------------------------------------------
# Exceptions
##
# Base class for all kinds of client-side errors.
class Error(Exception):
"""Base class for client errors."""
__str__ = object.__str__
##
# Indicates an HTTP-level protocol error. This is raised by the HTTP
# transport layer, if the server returns an error code other than 200
# (OK).
#
# @param url The target URL.
# @param errcode The HTTP error code.
# @param errmsg The HTTP error message.
# @param headers The HTTP header dictionary.
class ProtocolError(Error):
"""Indicates an HTTP protocol error."""
def __init__(self, url, errcode, errmsg, headers):
Error.__init__(self)
self.url = url
self.errcode = errcode
self.errmsg = errmsg
self.headers = headers
def __repr__(self):
return (
"<%s for %s: %s %s>" %
(self.__class__.__name__, self.url, self.errcode, self.errmsg)
)
##
# Indicates a broken XML-RPC response package. This exception is
# raised by the unmarshalling layer, if the XML-RPC response is
# malformed.
class ResponseError(Error):
"""Indicates a broken response package."""
pass
##
# Indicates an XML-RPC fault response package. This exception is
# raised by the unmarshalling layer, if the XML-RPC response contains
# a fault string. This exception can also be used as a class, to
# generate a fault XML-RPC message.
#
# @param faultCode The XML-RPC fault code.
# @param faultString The XML-RPC fault string.
class Fault(Error):
"""Indicates an XML-RPC fault package."""
def __init__(self, faultCode, faultString, **extra):
Error.__init__(self)
self.faultCode = faultCode
self.faultString = faultString
def __repr__(self):
return "<%s %s: %r>" % (self.__class__.__name__,
self.faultCode, self.faultString)
# --------------------------------------------------------------------
# Special values
##
# Backwards compatibility
boolean = Boolean = bool
def _iso8601_format(value):
if value.tzinfo is not None:
# XML-RPC only uses the naive portion of the datetime
value = value.replace(tzinfo=None)
# XML-RPC doesn't use '-' separator in the date part
return value.isoformat(timespec='seconds').replace('-', '')
def _strftime(value):
if isinstance(value, datetime):
return _iso8601_format(value)
if not isinstance(value, (tuple, time.struct_time)):
if value == 0:
value = time.time()
value = time.localtime(value)
return "%04d%02d%02dT%02d:%02d:%02d" % value[:6]
class DateTime:
"""DateTime wrapper for an ISO 8601 string or time tuple or
localtime integer value to generate 'dateTime.iso8601' XML-RPC
value.
"""
def __init__(self, value=0):
if isinstance(value, str):
self.value = value
else:
self.value = _strftime(value)
def make_comparable(self, other):
if isinstance(other, DateTime):
s = self.value
o = other.value
elif isinstance(other, datetime):
s = self.value
o = _iso8601_format(other)
elif isinstance(other, str):
s = self.value
o = other
elif hasattr(other, "timetuple"):
s = self.timetuple()
o = other.timetuple()
else:
s = self
o = NotImplemented
return s, o
def __lt__(self, other):
s, o = self.make_comparable(other)
if o is NotImplemented:
return NotImplemented
return s < o
def __le__(self, other):
s, o = self.make_comparable(other)
if o is NotImplemented:
return NotImplemented
return s <= o
def __gt__(self, other):
s, o = self.make_comparable(other)
if o is NotImplemented:
return NotImplemented
return s > o
def __ge__(self, other):
s, o = self.make_comparable(other)
if o is NotImplemented:
return NotImplemented
return s >= o
def __eq__(self, other):
s, o = self.make_comparable(other)
if o is NotImplemented:
return NotImplemented
return s == o
def timetuple(self):
return time.strptime(self.value, "%Y%m%dT%H:%M:%S")
##
# Get date/time value.
#
# @return Date/time value, as an ISO 8601 string.
def __str__(self):
return self.value
def __repr__(self):
return "<%s %r at %#x>" % (self.__class__.__name__, self.value, id(self))
def decode(self, data):
self.value = str(data).strip()
def encode(self, out):
out.write("# You can create custom transports by subclassing this method, and # overriding selected methods. class Transport: """Handles an HTTP transaction to an XML-RPC server.""" # client identifier (may be overridden) user_agent = "Python-xmlrpc/%s" % __version__ #if true, we'll request gzip encoding accept_gzip_encoding = True # if positive, encode request using gzip if it exceeds this threshold # note that many servers will get confused, so only use it if you know # that they can decode such a request encode_threshold = None #None = don't encode def __init__(self, use_datetime=False, use_builtin_types=False, *, headers=()): self._use_datetime = use_datetime self._use_builtin_types = use_builtin_types self._connection = (None, None) self._headers = list(headers) self._extra_headers = [] ## # Send a complete request, and parse the response. # Retry request if a cached connection has disconnected. # # @param host Target host. # @param handler Target PRC handler. # @param request_body XML-RPC request body. # @param verbose Debugging flag. # @return Parsed response. def request(self, host, handler, request_body, verbose=False): #retry request once if cached connection has gone cold for i in (0, 1): try: return self.single_request(host, handler, request_body, verbose) except http.client.RemoteDisconnected: if i: raise except OSError as e: if i or e.errno not in (errno.ECONNRESET, errno.ECONNABORTED, errno.EPIPE): raise def single_request(self, host, handler, request_body, verbose=False): # issue XML-RPC request try: http_conn = self.send_request(host, handler, request_body, verbose) resp = http_conn.getresponse() if resp.status == 200: self.verbose = verbose return self.parse_response(resp) except Fault: raise except Exception: #All unexpected errors leave connection in # a strange state, so we clear it. self.close() raise #We got an error response. #Discard any response data and raise exception if resp.getheader("content-length", ""): resp.read() raise ProtocolError( host + handler, resp.status, resp.reason, dict(resp.getheaders()) ) ## # Create parser. # # @return A 2-tuple containing a parser and an unmarshaller. def getparser(self): # get parser and unmarshaller return getparser(use_datetime=self._use_datetime, use_builtin_types=self._use_builtin_types) ## # Get authorization info from host parameter # Host may be a string, or a (host, x509-dict) tuple; if a string, # it is checked for a "user:pw@host" format, and a "Basic # Authentication" header is added if appropriate. # # @param host Host descriptor (URL or (URL, x509 info) tuple). # @return A 3-tuple containing (actual host, extra headers, # x509 info). The header and x509 fields may be None. def get_host_info(self, host): x509 = {} if isinstance(host, tuple): host, x509 = host auth, host = urllib.parse._splituser(host) if auth: auth = urllib.parse.unquote_to_bytes(auth) auth = base64.encodebytes(auth).decode("utf-8") auth = "".join(auth.split()) # get rid of whitespace extra_headers = [ ("Authorization", "Basic " + auth) ] else: extra_headers = [] return host, extra_headers, x509 ## # Connect to server. # # @param host Target host. # @return An HTTPConnection object def make_connection(self, host): #return an existing connection if possible. This allows #HTTP/1.1 keep-alive. if self._connection and host == self._connection[0]: return self._connection[1] # create a HTTP connection object from a host descriptor chost, self._extra_headers, x509 = self.get_host_info(host) self._connection = host, http.client.HTTPConnection(chost) return self._connection[1] ## # Clear any cached connection object. # Used in the event of socket errors. # def close(self): host, connection = self._connection if connection: self._connection = (None, None) connection.close() ## # Send HTTP request. # # @param host Host descriptor (URL or (URL, x509 info) tuple). # @param handler Target RPC handler (a path relative to host) # @param request_body The XML-RPC request body # @param debug Enable debugging if debug is true. # @return An HTTPConnection. def send_request(self, host, handler, request_body, debug): connection = self.make_connection(host) headers = self._headers + self._extra_headers if debug: connection.set_debuglevel(1) if self.accept_gzip_encoding and gzip: connection.putrequest("POST", handler, skip_accept_encoding=True) headers.append(("Accept-Encoding", "gzip")) else: connection.putrequest("POST", handler) headers.append(("Content-Type", "text/xml")) headers.append(("User-Agent", self.user_agent)) self.send_headers(connection, headers) self.send_content(connection, request_body) return connection ## # Send request headers. # This function provides a useful hook for subclassing # # @param connection httpConnection. # @param headers list of key,value pairs for HTTP headers def send_headers(self, connection, headers): for key, val in headers: connection.putheader(key, val) ## # Send request body. # This function provides a useful hook for subclassing # # @param connection httpConnection. # @param request_body XML-RPC request body. def send_content(self, connection, request_body): #optionally encode the request if (self.encode_threshold is not None and self.encode_threshold < len(request_body) and gzip): connection.putheader("Content-Encoding", "gzip") request_body = gzip_encode(request_body) connection.putheader("Content-Length", str(len(request_body))) connection.endheaders(request_body) ## # Parse response. # # @param file Stream. # @return Response tuple and target method. def parse_response(self, response): # read response data from httpresponse, and parse it # Check for new http response object, otherwise it is a file object. if hasattr(response, 'getheader'): if response.getheader("Content-Encoding", "") == "gzip": stream = GzipDecodedResponse(response) else: stream = response else: stream = response p, u = self.getparser() while data := stream.read(1024): if self.verbose: print("body:", repr(data)) p.feed(data) if stream is not response: stream.close() p.close() return u.close() ## # Standard transport class for XML-RPC over HTTPS. class SafeTransport(Transport): """Handles an HTTPS transaction to an XML-RPC server.""" def __init__(self, use_datetime=False, use_builtin_types=False, *, headers=(), context=None): super().__init__(use_datetime=use_datetime, use_builtin_types=use_builtin_types, headers=headers) self.context = context # FIXME: mostly untested def make_connection(self, host): if self._connection and host == self._connection[0]: return self._connection[1] if not hasattr(http.client, "HTTPSConnection"): raise NotImplementedError( "your version of http.client doesn't support HTTPS") # create a HTTPS connection object from a host descriptor # host may be a string, or a (host, x509-dict) tuple chost, self._extra_headers, x509 = self.get_host_info(host) self._connection = host, http.client.HTTPSConnection(chost, None, context=self.context, **(x509 or {})) return self._connection[1] ## # Standard server proxy. This class establishes a virtual connection # to an XML-RPC server. #
# This class is available as ServerProxy and Server. New code should # use ServerProxy, to avoid confusion. # # @def ServerProxy(uri, **options) # @param uri The connection point on the server. # @keyparam transport A transport factory, compatible with the # standard transport class. # @keyparam encoding The default encoding used for 8-bit strings # (default is UTF-8). # @keyparam verbose Use a true value to enable debugging output. # (printed to standard output). # @see Transport class ServerProxy: """uri [,options] -> a logical connection to an XML-RPC server uri is the connection point on the server, given as scheme://host/target. The standard implementation always supports the "http" scheme. If SSL socket support is available (Python 2.0), it also supports "https". If the target part and the slash preceding it are both omitted, "/RPC2" is assumed. The following options can be given as keyword arguments: transport: a transport factory encoding: the request encoding (default is UTF-8) All 8-bit strings passed to the server proxy are assumed to use the given encoding. """ def __init__(self, uri, transport=None, encoding=None, verbose=False, allow_none=False, use_datetime=False, use_builtin_types=False, *, headers=(), context=None): # establish a "logical" server connection # get the url p = urllib.parse.urlsplit(uri) if p.scheme not in ("http", "https"): raise OSError("unsupported XML-RPC protocol") self.__host = p.netloc self.__handler = urllib.parse.urlunsplit(["", "", *p[2:]]) if not self.__handler: self.__handler = "/RPC2" if transport is None: if p.scheme == "https": handler = SafeTransport extra_kwargs = {"context": context} else: handler = Transport extra_kwargs = {} transport = handler(use_datetime=use_datetime, use_builtin_types=use_builtin_types, headers=headers, **extra_kwargs) self.__transport = transport self.__encoding = encoding or 'utf-8' self.__verbose = verbose self.__allow_none = allow_none def __close(self): self.__transport.close() def __request(self, methodname, params): # call a method on the remote server request = dumps(params, methodname, encoding=self.__encoding, allow_none=self.__allow_none).encode(self.__encoding, 'xmlcharrefreplace') response = self.__transport.request( self.__host, self.__handler, request, verbose=self.__verbose ) if len(response) == 1: response = response[0] return response def __repr__(self): return ( "<%s for %s%s>" % (self.__class__.__name__, self.__host, self.__handler) ) def __getattr__(self, name): # magic method dispatcher return _Method(self.__request, name) # note: to call a remote object with a non-standard name, use # result getattr(server, "strange-python-name")(args) def __call__(self, attr): """A workaround to get special attributes on the ServerProxy without interfering with the magic __getattr__ """ if attr == "close": return self.__close elif attr == "transport": return self.__transport raise AttributeError("Attribute %r not found" % (attr,)) def __enter__(self): return self def __exit__(self, *args): self.__close() # compatibility Server = ServerProxy # -------------------------------------------------------------------- # test code if __name__ == "__main__": # simple test program (from the XML-RPC specification) # local server, available from Lib/xmlrpc/server.py server = ServerProxy("http://localhost:8000") try: print(server.currentTime.getCurrentTime()) except Error as v: print("ERROR", v) multi = MultiCall(server) multi.getData() multi.pow(2,9) multi.add(1,2) try: for response in multi(): print(response) except Error as v: print("ERROR", v)