SOAP和WebService

• soap:Simple Object Access Protocol

简单对象访问协议（SOAP）是一种轻量的、简单的、基于 XML 的协议，它被设计成在 WEB 上交换结构化的和固化的信息。 SOAP 可以和现存的许多因特网协议和格式结合使用，包括超文本传输协议（ HTTP），简单邮件传输协议（SMTP），多用途网际邮件扩充协议（MIME）。它还支持从消息系统到远程过程调用（RPC）等大量的应用程序。

 

• REST(Representational State Transfer表述性状态转移)

 

• Web Services 是一种思想，一种模式。一般的实现由基于soap的和REST的

WSDL:Web Services Description Language

 

WebService原来有两种方式，一是SOAP协议方式，在这种方式下需要WSDL,UDDI等，二是REST方式，这种方式根本不需要WSDL,UDDI等。而且REST方式现在看来是更加流行，更有前途的方式。 

 

 

有很多

WEB服务/SOAP/SOA开源软件：http://www.oschina.net/project/tag/138/webservices

 

 

A web service is a method of communication between two electronic devices over the World Wide Web. A web service is a software function provided at a network address over the web or the cloud, it is a service that is "always on" as in the concept of utility computing.

The W3C defines a "Web service" as:

[...] a software system designed to support  interoperable machine-to-machine interaction over a  network. It has an interface described in a machine-processable format (specifically  WSDL). Other systems interact with the Web service in a manner prescribed by its description using  SOAP messages, typically conveyed using HTTP with an  XML  serialization in conjunction with other Web-related standards. ^[1]

The W3C also states:

 

We can identify two major classes of Web services:

• REST-compliant Web services, in which the primary purpose of the service is to manipulate XML representations of Web resources using a uniform set of "stateless" operations; and
• arbitrary Web services, in which the service may expose an arbitrary set of operations.^[2]