First of all, you can provide an interface that the proxy needs to implement and access the proxy from the client application through that interface.

首先，你可以提供一个代理需要实现的接口，并通过该接口从客户端应用程序中访问代理。

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The client application calls the general proxy that calls the service proxy to invoke the service provider.

客户端应用程序调用通用代理(由它调用服务代理)来调用服务提供者。

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The XML proxy will also cache the result to the result cache as it flows back through the XML proxy to the client application.

XML 代理还将结果缓存到结果缓存，因为它通过 XML 代理流回到客户端应用程序。

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The truly paranoid may elect to use the 2.4 kernels' Netfilter4 facility (adding stateful packet filtering) or a commercial application-level proxy gateway.

CNN: Analysis: Linux security

The MobileSpan Gateway is a central server application that acts as a transparent browser and document proxy on the corporate network.

FORBES: Advantages of the MobileSpan Approach