我使用一个简单的jane,简化的,同步Python服务器和客户机的组合,通过TCP连接发送Google Protobuf消息。服务器使用Python2.5.4和Google Protobuf 2.4.1在Windows XP上运行。客户端运行在Ubuntu 12.04服务器上,使用Python 2.7.3和googleprotobuf2.4.1。
当我在XP机器上运行服务器并尝试使用Ubuntu机器上的客户机与之交谈时,服务器可以很好地解析请求消息并发送响应消息,但是客户机遇到了一个google.protobuf.message.DecodeError: Truncated message
错误。
如果我在XP机器上运行客户机和服务器,我不会遇到这个错误;如果我在Ubuntu机器上运行服务器,在XP机器上运行客户机,我也不会遇到这个错误。
似乎它可能与实际的Protobuf消息本身有关。。。如果我使用一个非常简单的Protobuf消息,比如下面示例中的消息,那么一切似乎都很好。但是,一旦我开始使用我们在生产中使用的实际Protobuf消息,我就会看到错误。不过,当服务器在Windows上而客户机在Ubuntu上时,我只得到错误信息,这看起来还是很奇怪的。
你知道会发生什么吗?!考虑到一些环境限制,我必须在Windows机器上使用Python 2.5和googleprotobuf2.4.1。
protobuf.proto示例
message Foo {
required string name = 1;
}
message Bar {
required string name = 1;
}
message Sucka {
required string name = 1;
repeated Foo foos = 2;
repeated Bar bars = 3;
}
message Result {
enum Exception {
NONE = 0;
GENERIC = 1;
}
required Exception exception = 1;
optional string message = 2;
optional Sucka sucka = 3;
}
服务器.py
import signal, socket, struct
from protobuf import Sucka, Result
class TestServer():
def __init__(self, host = '0.0.0.0', port = 9989):
self.host = host
self.port = port
self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.socket.bind((self.host, self.port))
self.socket.listen(1)
self.running = False
self.conn = None
self.run()
def run(self):
def handle_exit(signum, stack):
print 'Shutting down server in response to signal %s' % (str(signum))
self.running = False
signal.signal(signal.SIGINT, handle_exit)
signal.signal(signal.SIGTERM, handle_exit)
print 'Waiting on a connection'
self.running = True
while self.running:
try:
self.conn, addr = self.socket.accept()
print 'Connection from:', addr
size_t = self.conn.recv(4)
size = struct.unpack('!I', size_t)
data = self.conn.recv(size[0])
if not data:
raise Exception('No data... did the client close the connection?')
result = Result()
try:
sucka = Sucka()
sucka.ParseFromString(data)
result.exception = result.NONE
result.sucka.CopyFrom(sucka)
except Exception, ex:
print str(ex)
result.exception = result.GENERIC
result.message = 'Exception: %s' % (str(ex))
finally:
if self.conn: self.conn.close()
self.socket.close()
if __name__ == '__main__':
s = TestServer()
客户端.py
import socket, struct, time
from protobuf import Sucka, Result
class TestClient():
def __init__(self, sucka, host = '127.0.0.1', port = 9989):
self.addr = (host, port)
self.__call(sucka)
def __call(self, sucka):
size = sucka.ByteSize()
size_t = struct.pack('!I', size)
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect(self.addr)
sock.send(size_t)
sock.send(sucka.SerializeToString())
size_t = sock.recv(4)
size = struct.unpack('!I', size_t)
data = sock.recv(size[0])
result = Result()
result.ParseFromString(data)
if result.exception != Result.NONE:
raise Exception(result.message)
print str(result.sucka)
if __name__ == '__main__':
import sys, os
sys.path.insert(0, os.path.abspath(os.path.dirname(__file__)))
from protobuf import Sucka
sucka = Sucka()
sucka.name = 'testing'
for i in range(0, 25):
foo = sucka.foos.add()
foo.name = 'foo-%i-tester' % i
for i in range(0, 25):
bar = sucka.bars.add()
bar.name = 'bar-%i-tester' % i
c = TestClient(sucka, '127.0.0.1', 9989)
目前没有回答
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