A proxy is important to an Ajax architecture if you plan to aggregate content from multiple Web services or if you need to enforce a security mechanism on clients connecting to the network.
若想聚合来自多个Web服务的内容或需要在连接到网络的那些客户机上强制施行一种安全机制，那么代理对于Ajax架构而言就愈发重要。
Clients request will be routed to the web service proxy so that the message of service will be enforced to add message protection by security policy during the service transaction call.
客户请求将被路由到该Web服务代理，这样安全策略将强制服务消息在服务事务调用期间添加消息保护。
Specifically, a reverse proxy intercedes between Web clients and your Web server to capture each incoming HTTP request and its respective HTTP response.
特别地，反向代理将在Web客户机与Web服务器之间进行仲裁，以捕捉每个传入HTTP请求及其各自的HTTP响应。
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