Question

我试图通过一个简单的例子来学习Thrift（版本0.9.2）如何在python中运行。服务器代码工作正常，但运行客户端代码会出现错误Could not connect to localhost:9090，我尝试了shell命令

netstat -nap | grep 9090，此输出

tcp 0 0 0.0.35.130:9090 0.0.0.0:* LISTEN 4656/python，

和命令

nc -zv localhost 9090输出

nc: connect to localhost port 9090 (tcp) failed: Connection refused。

此时我不确定哪个部分（计算机本身，Thrift或代码？）出错了。所有代码都给出如下，有人会指出错误在哪里吗？

以下是helloworld.thrift：

const string HELLO_IN_KOREAN = "an-nyoung-ha-se-yo"
const string HELLO_IN_FRENCH = "bonjour!"
const string HELLO_IN_JAPANESE = "konichiwa!" 
service HelloWorld {
  void ping(),
  i32 sayHello(),
  i32 sayMsg(1:string msg)
}

，服务器代码是，

import sys
sys.path.append('../gen-py')

from helloworld import HelloWorld
from helloworld.ttypes import *

from thrift.transport import TSocket
from thrift.transport import TTransport
from thrift.protocol import TBinaryProtocol
from thrift.server import TServer

import socket

class HelloWorldHandler:
  def __init__(self):
    self.log = {}

  def ping(self):
    print "ping()"

  def sayHello(self):
    print "sayHello()"
    return "say hello from " + socket.gethostbyname()

  def sayMsg(self, msg):
    print "sayMsg(" + msg + ")"
    return "say " + msg + " from " + socket.gethostbyname()

handler = HelloWorldHandler()
processor = HelloWorld.Processor(handler)
transport = TSocket.TServerSocket('9090')
tfactory = TTransport.TBufferedTransportFactory()
pfactory = TBinaryProtocol.TBinaryProtocolFactory()

server = TServer.TSimpleServer(processor, transport, tfactory, pfactory)

print "Starting python server..."
server.serve()
print "done!"

这是客户端，

import sys
sys.path.append('../gen-py')

from helloworld import HelloWorld
from helloworld.ttypes import *
from helloworld.constants import *

from thrift import Thrift
from thrift.transport import TSocket
from thrift.transport import TTransport
from thrift.protocol import TBinaryProtocol

try:
  # Make socket
  transport = TSocket.TSocket('localhost', 9090)

  # Buffering is critical. Raw sockets are very slow
  transport = TTransport.TBufferedTransport(transport)

  # Wrap in a protocol
  protocol = TBinaryProtocol.TBinaryProtocol(transport)

  # Create a client to use the protocol encoder
  client = HelloWorld.Client(protocol)

  # Connect!
  transport.open()

  client.ping()
  print "ping()"

  msg = client.sayHello()
  print msg
  msg = client.sayMsg(HELLO_IN_KOREAN)
  print msg

  transport.close()

except Thrift.TException, tx:
  print "%s" % (tx.message)

Answer 1

我认为问题在于你的电话 -

transport = TSocket.TServerSocket('9090')

这应该是

transport = TSocket.TServerSocket(host='localhost', port=9090)

或

transport = TSocket.TServerSocket(port=9090)

实际上 - 甚至不需要port参数。如果你不给，它的默认值是9090.你的代码是说主持人是9090

这可以从netstat -nap输出中清楚地看出。这条线确实显示了一些东西＆＃39;监听端口9090（这是因为thrift TServerSocket中的默认端口是9090），但检查侦听地址，它是0.0.35.130。任何界面都应为0.0.0.0，127.0.0.1为localhost。

编辑：

事实上，如果你做socket.getaddrinfo('9090', 9090)。它确实显示了0.0.35.130的地址，因此您在netstat中看到的内容并不令人惊讶。

您的nc输出也表示没有正在侦听localhost:9090（通过连接拒绝错误）。

上述修复应解决问题。

在python中节俭，简单示例的客户端无法连接到Ubuntu 14.04 LTS上的本地主机

1 个答案: