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#Server | ||
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##服务器 | ||
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服务器(Server)指: | ||
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- 一个管理资源并为用户提供服务的计算机软件,通常分为文件服务器(能使用户在其它计算机访问文件),数据库服务器和应用程序服务器。 | ||
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- 运行以上软件的计算机,或称为网络主机(Host)。 | ||
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- 一般来说,服务器通过网络对外提供服务。可以通过Intranet对内网提供服务,也可以通过Internet对外提供服务。 | ||
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##Web服务器 | ||
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WEB服务器也称为WWW(WORLD WIDE WEB)服务器,主要功能是提供网上信息浏览服务。 WWW 是 Internet的多媒体信息查询工具,是 Internet 上近年才发展起来的服务,也是发展最快和目前用的最广泛的服务。正是因为有了WWW工具,才使得近年来 Internet 迅速发展,且用户数量飞速增长。 |
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#Web服务 | ||
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Web服务是一种服务导向架构的技术,通过标准的Web协议提供服务,目的是保证不同平台的应用服务可以互操作。 | ||
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根据W3C的定义,Web服务(Web service)应当是一个软件系统,用以支持网络间不同机器的互动操作。网络服务通常是许多应用程序接口(API)所组成的,它们透过网络,例如国际互联网(Internet)的远程服务器端,执行客户所提交服务的请求。 | ||
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尽管W3C的定义涵盖诸多相异且无法介分的系统,不过通常我们指有关于主从式架构(Client-server)之间根据SOAP协议进行传递XML格式消息。无论定义还是实现,WEB服务过程中会由服务器提供一个机器可读的描述(通常基于WSDL)以辨识服务器所提供的WEB服务。另外,虽然WSDL不是SOAP服务端点的必要条件,但目前基于Java的主流WEB服务开发框架往往需要WSDL实现客户端的源代码生成。一些工业标准化组织,比如WS-I,就在WEB服务定义中强制包含SOAP和WSDL。 | ||
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WEB服务实际上是一组工具,并有多种不同的方法调用之。三种最普遍的手段是: | ||
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- 远程过程调用(RPC) | ||
- 面向服务架构(SOA) | ||
- 表述性状态转移(REST)。 | ||
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##SOAP VS RESTful |
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