尝试使用一个服务调用在同一域中部署的另一个服务时超时

时间:2013-11-30 16:13:29

标签: python web-services soap suds spyne

基于此answer,我能够创建和部署2个Web服务。但是,如果一个服务试图调用另一个服务,它会在那里挂起,直到超时。

我的代码是:

from wsgiref.simple_server import make_server
from spyne.application import Application
from spyne.protocol.soap import Soap11
from spyne.util.wsgi_wrapper import WsgiMounter
from suds.client import Client
from spyne.decorator import srpc
from spyne.service import ServiceBase
from spyne.model.primitive import Unicode

class Service_Caller(ServiceBase):
  @srpc(_returns=Unicode)
  def call_service():
    client = Client("http://localhost:8000/hello?wsdl")
    result = client.service.say_hello('world')
    return result

class HelloWorldService(ServiceBase):
  @srpc(Unicode, _returns=Unicode)
  def say_hello(name):
      return [u'Hello, %s' % name]

if __name__ == '__main__':
  app1 = Application([Service_Caller], 'example1',
        in_protocol=Soap11(), out_protocol=Soap11())
  app2 = Application([HelloWorldService], 'example2',
        in_protocol=Soap11(), out_protocol=Soap11())
  wsgi_app = WsgiMounter({"caller":app1, "hello":app2})
  server = make_server('0.0.0.0', 8000, wsgi_app)
  server.serve_forever()

使用以下方式调用服务:

from suds.client import Client
client = Client('http://localhost:8000/caller?wsdl')
client.service.call_service()

目前,我的代码工作的唯一方法是在不同的域或不同的端口上部署2个服务。我想知道是否有人有同样的问题,并知道任何解决方法。感谢。

1 个答案:

答案 0 :(得分:1)

这是因为你正在使用的WSGI实现(wsgiref)。 wsgiref只是一个参考Wsgi实现,不支持并发。对于生产用途,您应该切换到正确的wsgi容器,如mod_wsgi,CherryPy,twisted等,从不使用wsgiref

同样,我不能强调这一点,从不使用wsgiref进行生产使用。

话虽如此,如果您只是想从另一个服务中调用一个服务,那么有更好的方法:

from spyne.util.appreg import get_application

app = get_application('example2', 'Application').null
print app.service.say_hello('world')

以下是完整的工作示例:

from spyne.application import Application
from spyne.protocol.soap import Soap11
from spyne.util.wsgi_wrapper import WsgiMounter
from spyne.decorator import srpc
from spyne.service import ServiceBase
from spyne.model.primitive import Unicode
from spyne.util.appreg import get_application

class Service_Caller(ServiceBase):
  @srpc(_returns=Unicode)
  def call_service():
    # 'Application' is the default when you omit the `name` argument to the
    # `Application` initializer.
    app1 = get_application('example2', 'Application').null
    result = '\n'.join(app1.service.say_hello('world'))

    return result

class HelloWorldService(ServiceBase):
  @srpc(Unicode, _returns=Unicode)
  def say_hello(name):
      return [u'Hello, %s' % name]

if __name__ == '__main__':
  import logging
  logging.basicConfig(level=logging.DEBUG)
  app1 = Application([Service_Caller], 'example1',
        in_protocol=Soap11(), out_protocol=Soap11())
  app2 = Application([HelloWorldService], 'example2',
        in_protocol=Soap11(), out_protocol=Soap11())
  wsgi_app = WsgiMounter({"caller":app1, "hello":app2})

  from wsgiref.simple_server import make_server
  server = make_server('0.0.0.0', 8000, wsgi_app)
  server.serve_forever()

我希望有所帮助。