The WSDL description specifies the address, allowable communication mechanisms, interface, and message types of a Web service.

WSDL描述指定Web服务的地址、允许的通信机制、接口和消息类型。

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If the Web Service switches to another transport such as insecure HTTP that does not have an encrypted communication channel, then the message is transmitted again in clear text.

如果Web服务切换到另一个传输，比如不具有加密通信隧道的非安全的HTTP，那么消息将再次以明文传输。

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To solve this problem its key to leave standard REST web services behind and find a way to use message passing, which is a direct communication way of notifying users of changed content.

解决这个问题的关键在于将标准REST Web服务抛在脑后，找出一种使用消息传递的方式，它是一种通知使用者内容变更的直接通信方式。

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