基于Web服务的态势标绘系统相关技术研究

为了实现态势标绘系统服务化的需求,在详细研究了浏览器端的图形绘制以及服务器发布服务的技术后,提出了基于Web Service的服务化态势标绘系统.态势标绘系统的核心是标号的绘制,服务化需要解决标号绘制的服务化.服务化的态势标绘系统需要提供接口,使采用不同绘图技术的客户端能够调用接口实现标号绘制.服务化的态势标绘系统需要能够快速响应用户的操作,为了验证采用Web Service技术的服务化态势标绘系统能否及时响应用户的操作,搭建了原型系统进行测试,测试结果表明在局域网的环境下能满足响应的需求.     

使用SOAP协议与Web Service通信的研究与实现

以查找Web服务、利用SOAP协议与Web Service进行通信为目标,介绍SOAP消息模型的原理,AXIS服务器的实际应用,SOAP默认使用HTTP作为网络传输协议。在与Web Service进行通信交互时,SOAP消息的负载来源于web服务的WSDL描述。完成Java客户端与Web Service的通信。     

基于AXIS+GSOAP的web图形服务技术研究和改进

分析了Web Service技术在跨平台、跨语言方面的特点,同时对图形服务系统web进行了适应性的改进。分析与比较了g SOAP+Axis技术与JNI技术的特点与优劣。通过对web图形服务的框架设计,最终用Axis+g SOAP框架实现了图形服务系统的web服务应用的开发。     

移动电子政务平台中安全Web服务的研究

在移动电子政务平台中,使用Webservice是常见的部署方案,web服务是自包含、自描述、模块化的应用,可以通过Web调用它部署的服务,但要求慎重考虑安全性,Web服务使用SOAP协议进行消息传送,SOAP以XML格式在信道中传输,存在信息泄露的风险,传送敏感数据时一定要加密。为解决安全性问题提出一种基于．NET平台的解决方案,使用Web服务时,通过授权的用户经过身份验证可以访问网络信息,客户端在登录时,先获取服务端的公钥,再与服务端协商出用于SOAP消息加密用的非对称密钥与对称密钥,并获取加密后的SessionID,利用SOAP头实现身份验证,利用SOAP扩展实现SOAP消息的选择性加密,使移动电子政务安全性得到保障。     

移动电子政务平台中安全Web服务的研究

在移动电子政务平台中使用Web服务需考虑其安全性,只有通过身份验证和授权的用户才可以访问Web服务提供的服务,SOAP消息以明文形式在信道中传输,在不安全的信道中很容易泄密,需对敏感数据加密;针对这些问题,提出了一种基于.NET平台的解决方案;客户端在登录时,先获取服务端的公钥,再与服务端协商出用于SOAP消息加密用的非对称密钥与对称密钥,并获取加密后的SessionID;利用SOAP头实现身份验证,利用SOAP扩展实现SOAP消息的选择性加密,保证了Web服务的安全。     

一个基于Agent的SOAP应用框架

简单对象访问协议SOAP是新一代分布式计算模型Web服务的基础,然而SOAP应用的性能问题是制约其发展的主要方面。该文从SOAP消息处理与SOAP消息传输两个方面,就影响SOAP应用性能的因素进行了分析,并论述了可以改进其性能的技术方法。在此基础上,该文采用Agent技术,提出了一个基于Agent的SOAP应用框架,并在面向Web服务的服务协作中间件中实现了此框架。该文的SOAP应用框架解决了SOAP应用的性能瓶颈问题,同时具有灵活的扩展机制,为基于Web的分布式计算提供了可行的实现模式。     

面向智能移动平台的Web服务推送技术研究

将Web服务引入到智能移动平台软件中,能够很好地解决目前平台软件复用率低,平台依赖性高等问题。但现有技术不能针对移动平台进行高效的数据推送,影响了Web服务的应用效果。为了解决这一问题,提出了一个面向智能移动平台的Web服务推送框架:扩展SOAP协议,提出SOAP推送协议作为数据交互协议;提出数据交换管程,以屏蔽所使用的数据推送协议;扩展Web数据推送中的代理模块,以形成服务代理。针对主流的Web应用,对推送框架进行了实验,并与传统轮询方式进行了比较,结果表明该框架具有较低的网络数据传输量,在智能移动平台中有重要的应用价值。     

移动教学信息服务系统设计与实现

移动互联网的应用普及使单纯的Web版校园网资源已不能满足师生对教学信息服务的要求。通过基于MVC模式的SSH构架设计了基于安卓系统客户端的移动教学信息服务系统,包括手机客户端和Web端管理系统,实现了教务管理、资源分发、教学服务的全新教学信息服务模式,让学生和教师能够不受时间、地点的限制,实时获取和管理各种教学信息。经某高校试用表明,学生和教师对该系统的使用体验较好,大大提高了教学服务与管理水平。     

使用X509证书签名加密SOAP消息

将Web Services应用于商业开发,安全性能是必须要考以明文字符的方式在服务和客户之间传递,这样很容易造成信息的泄露和被恶意更改.文中介绍了在.NET平台下如何使用X509证书对SOAP消息进行签名和加密的具体方法,并通过具体实例,讲解了如何将一个使用明文SOAP消息的WebServices和客户端改进成使用X509证书进行签名和加密的服务和客户端调用,以达到安全Web Services的目的.     

移动电子拍卖系统加密和签名特殊技术

在实现安全的移动电子拍卖系统的实践经验基础上,分析了系统的安全性需求,介绍了移动电子拍卖系统加密和签名特殊技术,包括密钥的生成、存储和更新,服务器端对SOAP消息的加密、解密以及自签名证书密钥模型,客户端加密引擎和签名引擎的实现。该系统可以成功地移植到移动设备中,提高了无线Web服务的安全性。     

Mixed reality web service platform

This paper presents a RESTful Web service platform for applications for both Web browsers and mobile clients. Having a common service backend makes creating applications fast, simple, and open to third parties. The paper presents two mixed reality applications that have been built on the platform. It summarizes requirements for a mixed reality platform and defines a mixed reality domain model that the platform and applications share. In addition, it describes how the clients can use the REST interface to perform operations on user-generated content, as well as access real-life commercial geo-content such as street-view panoramas and building models.     

Distributed simulation of DEVS and Cell-DEVS models using the RISE middleware

With the expansion of the Web, the desire toward global cooperation in the distributed simulation technology has also been on the rise. However, since current distributed simulation interoperability methods are coupled with system implementations, they place constraints on enhancing interoperability and synchronization algorithms. To enhance simulation interoperability on the Web, we implemented the RISE (RESTful Interoperability Simulation Environment) middleware, the first existing simulation middleware to be based on RESTful Web-services (WS). RISE is a general middleware that serves as a container to hold different simulation environments without being specific to a certain environment. RISE can hold heterogeneous simulations, and it exposes them as services via the Web. One of such services is called Distributed CD++ (DCD++) simulation system, an extension of the CD++ core engine that allows executing DEVS and Cell-DEVS models. Here, we introduce a proof-of-concept design and implementation of DCD++ using the distributed simulation using the RISE environment. We show how the RESTful WS interoperability style in RISE has improved the design, implementation and the performance of the DCD++ simulator. We also discuss a substantial performance improvement of the implementation of the RISE-based DCD++ presented here, showing many advantages of the RESTful WS presented here: improved interoperability, a seamless method to be connected into a cloud computing environment, and performance improvement when compared to our SOAP-based DCD++ in a similar testing environment.     

基于 REST 风格的科学计算环境 Web服务 API

基于 Web 页面的计算门户提供了简单易用的用户使用界面,这些门户需要访问异构的计算机群。本文研究和实现基于 REST 风格的科学计算环境 Web 服务 API (SCEAPI-REST),其核心思想是充分利用 Web 服务在复杂系统中的集成优势以及 REST 风格的 API 跨平台和跨编程语言的特性,为开发者提供简单易用的计算机群开发接口,包括用户管理、资源查询、作业管理和文件传输等功能。基于 SCEAPI-REST,开发人员不再需要解决机群访问的繁杂问题,只需要专心构建面向科学计算的终端软件。该 API 已经应用到计算化学、材料科学、生物信息等多个领域的专业社区和工具软件。     

Daios: Efficient Dynamic Web Service Invocation

Systems based on the service-oriented architecture (SOA) paradigm must be able to bind to arbitrary Web services at runtime. However, current service frameworks are predominantly used through precompiled service-access components, which are invariably hard-wired to a specific service provider. The Dynamic and Asynchronous Invocation of Services framework is a message-based service framework that supports SOA implementation, allowing dynamic invocation of SOAP/WSDL-based and RESTful services. It abstracts from the target service's internals, decoupling clients from the services they use.     

StoRHm: a protocol adapter for mapping SOAP based Web Services to RESTful HTTP format

A protocol adapter ideally suited to enable enterprises to gradually transition from SOAP Web Services to RESTful HTTP Web Services without impacting existing clients is presented in this paper. The inherent advantage of such a transition is the visibility of RESTful HTTP messages to Web intermediaries such as caches. In contrast, SOAP messages are opaque, which disables Web intermediaries. While both approaches can use HyperText Transfer Protocol (HTTP) for message transfer, the paradigms contrast sharply. SOAP uses an interface specific approach whereas RESTful HTTP uses a Uniform Interface approach. SOAP marks up its payload with eXtensible Markup Language (XML) whereas in certain situations RESTful HTTP requires no XML. We present the disadvantages of the SOAP approach and outline how the RESTful HTTP approach solves these issues. We present results showing opaque SOAP messages transformed into transparent RESTful HTTP messages. We present StoRHm (SOAP to RESTful HTTP mapping), a protocol adapter which maps SOAP messages to RESTful HTTP format.     

表述性状态转移网络服务平台的研究及实施

电子商务的蓬勃发展使得越来越多的采购商们倾向于利用互联网络进行采购。然而,尽管大部分商业网站都提供了详细周全的产品查询功能,但是当采购商们需要查询大量产品,譬如电子产品元器件,来进行采购时,往往费时费力。而网页这种适宜人类用户进行查询浏览的界面形式并不适合程序来自动处理,一个原因就是网页结构的变化会影响网页数据的抽取过程。本文利用网络服务的思想,使数据抽取通过网站提供的独立于网页的服务来完成,从而避免网页结构变化的影响。在剖析了表述性状态转移面向资源以及对资源进行操作的统一接口特性后,本文指出表述性状态转移用于网络服务的优势。基于这种思想,利用CXF框架和Spring技术构建一个表述性状态转移风格的服务平台,该平台向客户提供查询电子产品信息的网络服务。在此服务支持下,客户端程序可以利用XML解析工具方便地抽取所需要的数据信息。     

一种基于SOAP的移动Agent通信机制实现

SOAP（Simple Object Access Protocol,简单对象访问协议）技术有助于实现大量异构程序和平台之间的通信,从而使存在的应用能够被广泛的用户所访问。SOAP是把成熟的基于HTTP的WEB技术与XML的灵活性和可扩展性组合在一起。该文在分析已有的移动Agent通信机制上,结合XML,SOAP,Web Service等技术,提出了一种基于SOAP协议的移动Agent通信机制。     

A reputation assessment model for trustful service recommendation

Nowadays, software systems are mainly Web front-based, Cloud-deployed and accessible by a wide audience over the Internet. These online systems commonly rely on Service-oriented Architecture principles, where they are built as orchestrations of RESTful (and in some rare cases as SOAP-based) services. Integrating new services in an existing orchestration is a challenging and risky task because trustworthiness of these services is not guaranteed throughout their lifetime. Reputation of services is a good indicator about the overall quality of services, because it reflects consumer satisfaction regarding the service-offered functionality and quality. Thus, reputation of services could be considered in the selection and recommendation of trustworthy services. In this paper, we present a framework for the management of web service reputation to conduct a better service recommendation. We present a reputation assessment model that aggregates fair user feedback ratings. The model includes a mechanism that prevents the introduction of malicious feedback ratings, by penalizing detected specious users. In addition, this framework includes a bootstrapping technique for estimating reputation of newcomer services based on neighbor similarity and initial advertised QoS. A set of experiments has been conducted to evaluate the effectiveness of the proposed framework. The results of these experiments highlighted the potential of our framework. These are presented at the end of the paper.     

移动网络中Web服务应用架构研究

提出一个应用于移动网络的Web服务交互通信体系架构,其将基于XML的系统通信的负担从移动客户转移到外部中间件上,该中间件像网关一样,使用快速的二进制协议以客户/服务器方式与移动设备进行轻量级通信,并同时负责解析对Web服务的请求。