python web-services：使用 ZSI 从服务器返回错误

发布于 2024-07-12 01:37:54 字数 1277 浏览 8 评论 0原文

我有兴趣为 Web 服务编写一个 Python 客户端，出于测试目的，拥有一个简单的存根服务器也会非常有趣。我正在使用 python 2.3 和 ZSI 2.0。

我的问题是我无法从服务器返回异常。

如果我在 wsdl 中引发用于肥皂故障的类型的异常，我会收到 TypeError '异常必须是类、实例或字符串（已弃用），而不是 EmptyStringException_Def'。我认为这意味着错误对象不是 Exception 的子类，但是以这种方式修改生成的代码没有帮助 - 当然，不必修改生成的代码会好得多:)

如果我返回错误对象作为响应的一部分，它只是被忽略。

我找不到任何有关 ZSI 中的故障处理的文档。有什么提示吗？

下面是一个非常简单服务的服务器的示例代码，只有一个方法，spellBackwards，如果输入字符串为空，它应该返回一个soap错误：

#!/usr/bin/env python
from ZSI.ServiceContainer import AsServer
from SpellBackwardsService_services_server import *
from SpellBackwardsService_services_types import *
class SpellBackwardsServiceImpl(SpellBackwardsService):
    def soap_spellBackwards(self, ps):
        response = SpellBackwardsService.soap_spellBackwards(self, ps)
        input = self.request._in
        if len(input) != 0:
            response._out = input[::-1]
        else:
            e = ns0.EmptyStringException_Def("fault")
            e._reason = "Empty input string"

            # The following just produces an empty return message:
            # response._fault = e

            # The following causes TypeError
            # raise e

        return response

AsServer(port=8666, services=[SpellBackwardsServiceImpl(),])

原文

I'm interested in writing a python client for a web-service, and for testing purposes it would be very interesting also to have a simple stub server. I'm using python 2.3, and ZSI 2.0.

My problem is that I do not manage to return an exception from the server.

If I raise an exception of the type used for the soap fault in the wsdl, I get the TypeError 'exceptions must be classes, instances, or strings (deprecated), not EmptyStringException_Def'. I thought this meant that the fault object was not a subclass of Exception, but modifying the generated code in this way did not help - and of course, not having to modify the generated code would be much better :)

If I return the fault object as part of the response, it is just ignored.

I couldn't find any documentation about faults handling in ZSI. Any hints?

Here's a sample code for a server of a very simple service with just one method, spellBackwards, which should return a soap fault if the input string is empty:

#!/usr/bin/env python
from ZSI.ServiceContainer import AsServer
from SpellBackwardsService_services_server import *
from SpellBackwardsService_services_types import *
class SpellBackwardsServiceImpl(SpellBackwardsService):
    def soap_spellBackwards(self, ps):
        response = SpellBackwardsService.soap_spellBackwards(self, ps)
        input = self.request._in
        if len(input) != 0:
            response._out = input[::-1]
        else:
            e = ns0.EmptyStringException_Def("fault")
            e._reason = "Empty input string"

            # The following just produces an empty return message:
            # response._fault = e

            # The following causes TypeError
            # raise e

        return response

AsServer(port=8666, services=[SpellBackwardsServiceImpl(),])

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