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1.
基于嵌入式WEB SERVER的无线传感器网络系统设计   总被引:1,自引:0,他引:1  
针对无线传感器网络大量算法和协议验证与应用的需求,提出了一种新的基于嵌入式Web Server的无线传感器网络平台构架.出于传感器节点系统造价、开发程度、资源需求、通信能力及其通信可靠性的考虑,设计了以80C51和ARM7芯片为核心的传感器节点与Sink节点的硬件,以嵌入式实时操作系统μC/OS-Ⅱ和TCP/IP协议为核心的软件.实现了一个基于嵌入式Web Server的Internet的多任务系统平台.  相似文献   

2.
设计一个可以嵌入到其他应用系统的嵌入式Web服务器,可以为远程监控、数据传输、分布式计算提供一个平台.利用Socket接口、TCP/IP协议、HTTP协议标准,根据Java Servlet规范作为支撑理论实现了基于C语言的Servlet容器.阐述了系统的实现方案、实现标准的HTTP协议,并设计出模型,该模型给出了Servlet的基本运行环境.实现此模型,并在此模型上进行系统应用开发,实践证明此系统具有高性能、可扩展的特点.  相似文献   

3.
基于SOA架构的Web服务组合系统   总被引:15,自引:0,他引:15  
应用SOA架构是构建松散耦合Web服务组合系统的一个有效途径.本文在深入研究Web服务组合系统一般工作流程的基础上,提出了一种基于SOA架构和分层协议栈机制构建Web服务组合系统的方法,给出了服务分层模型和分层协议栈,设计并实现了一个基于SOA架构的松耦合原型系统来实现Web服务组合,可为Web服务组合的研究和企业应用提供灵活的实验及应用开发平台.  相似文献   

4.
Web服务基于标准的数据格式和协议,如XML、SOAP和HTTP,不同平台和操作系统的客户和服务端可以基于同样的协议,没有障碍地通信,Web服务客户端只需标识Web服务的位置及其可以调用的方法,就可以简单地使用Web服务。微软公司的.NET框架针对Web服务提供了广泛的支持。因此研究了.NET环境下Web Services的构建、处理流程,举例说明了Web服务的典型应用。  相似文献   

5.
集成式Web应用开发平台的设计与实现   总被引:3,自引:0,他引:3  
提出了一种用Java技术开发的集成式Web应用程序开发平台。这个平台是一套自定义的Java类库,基于J2SDK1.4/servlet2.0、JSP1.1设计开发,封装了构建大型Web应用程序所需的常用功能操作,内嵌了Web项目从构架到发布的中间流程。通过该平台,可以快速高效、统一规范地开发各种分布式Web应用项目。最后给出了该平台在设备网络监控服务系统(Web-Moniserver)中的应用实例。  相似文献   

6.
介绍了基于Web Services和COM技术的登录助手的设计思想、组成和总体构架,阐述了其主要的实现技术.该登录助手在不改变原有的Web应用结构的基础上,利用Web Services技术实现了一个登录代理服务,并在浏览器层次提供了一个面向用户的登录代理插件,该插件和登录代理服务协同工作,共同实现了异构Web信息系统之间用户身份信息的统一管理和统一存放.  相似文献   

7.
基于Web服务的EDI系统的事务处理   总被引:2,自引:0,他引:2  
本文分析了EDI系统和Web服务的特点,将基于Web服务的EDI系统事务分为两种类型:含单个Web服务的事务和包括多个Web服务的事务。对前者采用传统两阶段提交协议进行处理。后者由于跨时域和地域,可以通过扩展传统两阶段提交协议和增加事务管理器来统一处理。  相似文献   

8.
分析了目前主要的Web跨域认证技术特点和不足,设计了一种新的基于URL重定向的Web跨域认证构架,给出了典型协议实现并进行了安全性分析。它对信息系统改动极少,且不易受NAT网关和防火墙的限制,具有良好的应用前景。  相似文献   

9.
首先分析现有的统一认证系统的特点并指出其在应用集成上存在的不足,由此提出一个基于轻量目录访问协议和SOAP的统一认证实现框架,利用目录技术实现了对网络用户和网络应用的统一管理,利用SOAP将认证服务封装为一个Web服务,提供对Web Service实现框架的支持,使网络管理更加简单有效.  相似文献   

10.
罗婵  董丽丽  马宗方 《微机发展》2006,16(10):237-239
企业门户系统的目标是消除企业信息孤岛,无缝集成各种应用系统并实现统一身份认证。运用SOAP的消息机制和Web Services的核心概念及运行机制,提出了基于SOAP协议的统一身份认证系统架构,解决了集成新旧系统时出现的关键问题。采用.NET技术实现了原型系统,实现了用户统一身份认证,从而完成了在异构平台、异构数据库下的企业数据流、应用流的全面集成。  相似文献   

11.
Estelle currently does not support ASN.1 and encoding and decoding rules. Tools developed for Estelle and ASN.1 have been developed independently of each other. As such, ASN.1 tools do not support Estelle and vice versa. At present, due to these two separate specifications, implementation is time consuming. It is imperative to find a way for ASN.1 and Estelle specifications to be efficiently integrated to facilitate fully automatic implementation. This paper describes how Estelle and ASN.1 can be integrated to give a unified specification which can then be fed into a software environment to produce a truly automatic implementation of an application protocol, including encoding and decoding of protocol data units, when application layer protocols are specified in Estelle and in ASN.1. The integration approach is based on the powerful programming concept, Data Abstraction. The software that implements this integrated specification approach to automatic implementation of application protocol is called EASE (Estelle and ASN.1 Software Environment). To demonstrate the viability of the approach, the unified specification of the ISO ACSE and Presentation protocols are also presented.  相似文献   

12.
Web services interoperability specifications   总被引:1,自引:0,他引:1  
A proposed conceptual framework for analyzing Web services interoperability issues provides a context for studying existing standards and specifications and for identifying new opportunities to provide automated support, for this technology. Web services are becoming the technology of choice for realizing service-oriented architectures (SOAs). Web services simplify interoperability and, therefore, application integration. They provide a means for wrapping existing applications so developers can access them through standard languages and protocols.  相似文献   

13.
Automated Web service discovery requires Web service capability specifications of a high precision. Semantic-based approaches are inherently more precise than conventional keyword-based approaches. This paper proposes to build capability specifications of Web services based on an environment ontology, the main concepts of which are the environment entities in a particular application domain and their interactions. For each environment entity, there is a tree-like hierarchical state machine modeling the effects that are to be achieved by the Web services on this environment entity. The proposed approach is based on the assumption that the Web service capability specifications, built on the effects of the Web services on the environment entities, are more accessible and observable. Algorithms for constructing the domain environment ontology and the matchmaking between the Web service capability specifications are presented to show how Web service discovery is supported. An example on travel service is given to illustrate this proposed approach.  相似文献   

14.
提出信息资源共享和统一身份认证的必要性。总结了在数字化校园系统开发中应用WebServices的优势。介绍了与面向服务架构的WebServices技术相关的XML、SOAP、WSDL、UDDI等协议和技术标准。并以学生信息查询为例阐述了在.net平台上开发WebServices的过程。  相似文献   

15.
分析了基于Web服务的敏捷供应链信息系统集成框架,在此基础上讨论了基于统一数据规范实现数据交换的流程,提出了基于Web服务的数据交换平台模型。并指出了应建立敏捷供应链信息数据交换规范,以便实现数据交换平台,完成企业间的数据交换,从而方便敏捷供应链的动态集成。  相似文献   

16.
分析了基于Web服务的敏捷供应链信息系统集成框架,在此基础上讨论了基于统一数据规范实现数据交换的流程,提出了基于Web服务的数据交换平台模型。并指出了应建立敏捷供应链信息数据交换规范,以便实现数据交换平台,完成企业间的数据交换,从而方便敏捷供应链的动态集成。  相似文献   

17.
现有的基于WS-Security(Web服务安全)的安全工具在技术层面上提供了Web服务安全的基础设施,但是这些工具需要用户拥有丰富的安全知识,并且没有提供展现业务上下文的手段,给业务用户对安全设施的使用带来了困难。基于MDA的思想设计了一个与业务流程结合的安全策略模型。在这个安全模型中,将描述业务流程的应用模型和描述协同应用安全信息的安全模型结合起来,并基于安全模型使用GMF框架实现了相应的配置工具。业务人员可以在可视化的业务流程之上,基于预定义的安全策略模型,配置Web服务安全策略。工具自动将配置的安全策略转换为WS-Security Policy规范文档。  相似文献   

18.
A new form of personal identity is emerging on the Web. Decentralized identification protocols are a departure from traditional distributed authentication approaches developed for the Internet. From a technical perspective, they're quite similar to distributed systems based on public-key infrastructures or federated identity systems, such as those proposed by the Liberty Alliance, or Microsoft's Passport. What distinguishes the new decentralized approach is its use of URIs as the underlying identifier. The Web - using URIs as the basis for a global hypertext system of documents - set off an unprecedented explosion of human communication and knowledge sharing. So, too, could these new decentralized identity systems potentially augment the Web to let us reliably and scalably communicate with each other about our identities in a more trustworthy manner.  相似文献   

19.
Modern Web-based application infrastructures are based on clustered multitiered architectures, where request distribution occurs in two sequential stages: over a cluster of Web servers and over a cluster of application servers. Much work has focused on strategies for distributing requests across a Web server cluster in order to improve the overall throughput across the cluster. The strategies applied at the application layer are the same as those at the Web server layer because it is assumed that they transfer directly. In this paper, we argue that the problem of distributing requests across an application server cluster is fundamentally different from the Web server request distribution problem due to core differences in request processing in Web and application servers. We devise an approach for distributing requests across a cluster of application servers such that the overall system throughput is enhanced, and load across the application servers is balanced.  相似文献   

20.
The World Wide Web, with its paradigms of surfing and searching for information, has become the predominant system for computer-based information retrieval. Media resources, however information-rich, only play a minor role in providing information to Web users. While bandwidth (or the lack thereof) may be an excuse for this situation, the lack of surfing and searching capabilities on media resources are the real issue. We present an architecture that extends the Web to media, enabling existing Web infrastructures to provide seamless search and hyperlink capabilities for time-continuous Web resources, with only minor extensions. This makes the Web a true distributed information system for multimedia data. The article provides an overview of the specifications that have been developed and submitted to the IETF for standardization. It also presents experimental results with prototype applications.  相似文献   

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