获取错误“；“无法封送无”；尽管在Python中使用XMLRPC时添加了allow_none=True

我尝试在Python中使用XMLRPC创建一个简单的下载和上传系统

以下是客户端的代码（将此文件命名为client.py）

下面是侦听器的代码（将此文件命名为listener.py）

如何启动系统？

将两个文件放在同一目录中

执行以下命令

python listener 9000

python侦听器9500

python客户端9000（然后将远程客户端端口设为9500作为输入）

python客户端9500（然后将远程客户端端口设为9000作为输入）

文件上传工作正常

但文件下载不起作用

它给了我以下的错误

Traceback (most recent call last):
  File "collab_client.py", line 57, in <module>
    mod_file_download(file_name, local_port, remote_proxy, local_proxy)
  File "collab_client.py", line 17, in mod_file_download
    remote_proxy.mod_file_transfer(file_name, local_proxy)
  File "/usr/lib/python2.7/xmlrpclib.py", line 1240, in __call__
    return self.__send(self.__name, args)
  File "/usr/lib/python2.7/xmlrpclib.py", line 1593, in __request
    allow_none=self.__allow_none)
  File "/usr/lib/python2.7/xmlrpclib.py", line 1091, in dumps
    data = m.dumps(params)
  File "/usr/lib/python2.7/xmlrpclib.py", line 638, in dumps
    dump(v, write)
  File "/usr/lib/python2.7/xmlrpclib.py", line 660, in __dump
    f(self, value, write)
  File "/usr/lib/python2.7/xmlrpclib.py", line 762, in dump_instance
    self.dump_struct(value.__dict__, write)
  File "/usr/lib/python2.7/xmlrpclib.py", line 741, in dump_struct
    dump(v, write)
  File "/usr/lib/python2.7/xmlrpclib.py", line 660, in __dump
    f(self, value, write)
  File "/usr/lib/python2.7/xmlrpclib.py", line 762, in dump_instance
    self.dump_struct(value.__dict__, write)
  File "/usr/lib/python2.7/xmlrpclib.py", line 741, in dump_struct
    dump(v, write)
  File "/usr/lib/python2.7/xmlrpclib.py", line 660, in __dump
    f(self, value, write)
  File "/usr/lib/python2.7/xmlrpclib.py", line 720, in dump_array
    dump(v, write)
  File "/usr/lib/python2.7/xmlrpclib.py", line 660, in __dump
    f(self, value, write)
  File "/usr/lib/python2.7/xmlrpclib.py", line 664, in dump_nil
    raise TypeError, "cannot marshal None unless allow_none is enabled"
TypeError: cannot marshal None unless allow_none is enabled

回溯（最近一次呼叫最后一次）：
文件“collab_client.py”，第57行，在
mod_file_下载（文件名、本地_端口、远程_代理、本地_代理）
mod_文件下载中第17行的文件“collab_client.py”
远程代理.mod文件传输（文件名，本地代理）
文件“/usr/lib/python2.7/xmlrpclib.py”，第1240行，在__
返回self.\u发送（self.\u名称，args）
文件“/usr/lib/python2.7/xmlrpclib.py”，第1593行，在请求中
允许\无=自身。\允许\无）
文件“/usr/lib/python2.7/xmlrpclib.py”，第1091行，转储
数据=m.dumps（参数）
文件“/usr/lib/python2.7/xmlrpclib.py”，第638行，转储
转储（v，写入）
文件“/usr/lib/python2.7/xmlrpclib.py”，第660行，在
f（自我、价值、写入）
文件“/usr/lib/python2.7/xmlrpclib.py”，第762行，在dump_实例中
self.dump\u struct（value.\u dict\u，write）
文件“/usr/lib/python2.7/xmlrpclib.py”，第741行，位于dump_结构中
转储（v，写入）
文件“/usr/lib/python2.7/xmlrpclib.py”，第660行，在
f（自我、价值、写入）
文件“/usr/lib/python2.7/xmlrpclib.py”，第762行，在dump_实例中
self.dump\u struct（value.\u dict\u，write）
文件“/usr/lib/python2.7/xmlrpclib.py”，第741行，位于dump_结构中
转储（v，写入）
文件“/usr/lib/python2.7/xmlrpclib.py”，第660行，在
f（自我、价值、写入）
文件“/usr/lib/python2.7/xmlrpclib.py”，第720行，在dump_数组中
转储（v，写入）
文件“/usr/lib/python2.7/xmlrpclib.py”，第660行，在
f（自我、价值、写入）
文件“/usr/lib/python2.7/xmlrpclib.py”，第664行，在dump_nil中
raise TypeError，“除非启用了allow\u None，否则无法封送None”
TypeError:除非启用了allow\u None，否则无法封送None

但是我已经在侦听器文件中给出了选项

allow\u none=True

。

---

我哪里做错了？我头痛了很久才发现。似乎无法发送或发送连接详细信息。在函数

mod_file_transfer

中，我试图将客户机连接详细信息作为对象发送（以便服务器知道必须将文件发送给谁），这导致了错误

---

我只是简单地将客户端连接细节作为字符串发送，结果成功了。谢谢我

有人吗？

import sys
import xmlrpclib
from SimpleXMLRPCServer import SimpleXMLRPCServer

def mod_file_transfer(file_name, requestor_proxy):
    """Initiating the file transfer"""

    print "[mod_file_transfer fired]"

    file_path = "./" + file_name

    print requestor_proxy

    with open(file_path, "rb") as handle:
        bin_data = xmlrpclib.Binary(handle.read())

    # Connecting to requestor's server
    requestor_proxy.mod_file_download_receive(bin_data, file_name)

    return True

def mod_file_receive(bin_data, file_name):
    """Used to receive a file upon a request of an upload"""

    print "[mod_file_receive fired]"

    new_file_name = "./" + file_name
    with open(new_file_name, "wb") as handle:
        handle.write(bin_data.data)
        return True

def mod_file_download_receive(bin_data, file_name):
    """Used to receive a file upon request of a download"""

    print "[mod_file_download_receive fired]"

    new_file_name = "./" + file_name + str(1)
    with open(new_file_name, "wb") as handle:
        handle.write(bin_data.data)
        return True

##MAIN MODULE STARTS HERE##

local_port = sys.argv[1]

# Declared an XMLRPC server
node = SimpleXMLRPCServer(("localhost", int(local_port)), logRequests=True, allow_none=True)
print "Listening on port %s..." % local_port

# Registered a list of functions
node.register_function(mod_file_transfer, 'mod_file_transfer')
node.register_function(mod_file_receive, 'mod_file_receive')
node.register_function(mod_file_download_receive, 'mod_file_download_receive')

# Initialized the XMLRPC server
node.serve_forever()

Traceback (most recent call last):
  File "collab_client.py", line 57, in <module>
    mod_file_download(file_name, local_port, remote_proxy, local_proxy)
  File "collab_client.py", line 17, in mod_file_download
    remote_proxy.mod_file_transfer(file_name, local_proxy)
  File "/usr/lib/python2.7/xmlrpclib.py", line 1240, in __call__
    return self.__send(self.__name, args)
  File "/usr/lib/python2.7/xmlrpclib.py", line 1593, in __request
    allow_none=self.__allow_none)
  File "/usr/lib/python2.7/xmlrpclib.py", line 1091, in dumps
    data = m.dumps(params)
  File "/usr/lib/python2.7/xmlrpclib.py", line 638, in dumps
    dump(v, write)
  File "/usr/lib/python2.7/xmlrpclib.py", line 660, in __dump
    f(self, value, write)
  File "/usr/lib/python2.7/xmlrpclib.py", line 762, in dump_instance
    self.dump_struct(value.__dict__, write)
  File "/usr/lib/python2.7/xmlrpclib.py", line 741, in dump_struct
    dump(v, write)
  File "/usr/lib/python2.7/xmlrpclib.py", line 660, in __dump
    f(self, value, write)
  File "/usr/lib/python2.7/xmlrpclib.py", line 762, in dump_instance
    self.dump_struct(value.__dict__, write)
  File "/usr/lib/python2.7/xmlrpclib.py", line 741, in dump_struct
    dump(v, write)
  File "/usr/lib/python2.7/xmlrpclib.py", line 660, in __dump
    f(self, value, write)
  File "/usr/lib/python2.7/xmlrpclib.py", line 720, in dump_array
    dump(v, write)
  File "/usr/lib/python2.7/xmlrpclib.py", line 660, in __dump
    f(self, value, write)
  File "/usr/lib/python2.7/xmlrpclib.py", line 664, in dump_nil
    raise TypeError, "cannot marshal None unless allow_none is enabled"
TypeError: cannot marshal None unless allow_none is enabled