动态脚本语言Lua与C++交互方法的研究与实现

针对当前利用C＋＋开发大型复杂程序代价高、周期长的问题,为了充分发挥Lua动态脚本语言的特点。重点探讨了如何在Lua脚本中模拟消息事件机制和Lua访问C＋＋接口的具体实现方法以及Lua调试器的设计方案。     

调用XML中的Flash文件制作动态Flash课件相册

通过编写Flash的ActionScript脚本语言,实现在Flash中调用外部XML数据文件,而且这些XML数据文件都是由为实现同一个教学目标而制作的Flash课件,使用动态交互的加裁这一特性来制作动态Flash课件相册,并在制作过程中进行了初步的探讨,并取得了较好的效果,现就制作过程中会遇到的难题及解决方法进行详细的演示说明.     

政府网站运行的安全性问题研究

本文以政府部门计算机网络和网站在运行中碰到的安全问题,阐述了如何建设相对安全的网控中心,并对因特网上发布信息的网站所受到的各种攻击作出了说明,以及如何采用各种技术方法和措施填补漏洞、防范攻击,保障网站安全。     

服务器-客户端协作的跨站脚本攻击防御方法

在网络应用的链接中注入恶意代码,以此欺骗用户浏览器,当用户访问这些网站时便会受到跨站脚本攻击.为此,提出基于服务器端-客户端协作的跨站脚本攻击防御方法.利用规则文件、文档对象模型完整性测试和脚本混淆监测等方法,提高脚本的检测效率和准确性.实验结果表明,该方法能获得良好的攻击防御效果.     

Lua语言在轻量级Web服务器设计中的应用

Lua是一种小巧的脚本语言,它的易扩展性与整合性,使得它可以与别的语言很好的融合在一起,实现各种各样的需求,因此它的应用非常的广泛.本文利用Lua脚本语言与标准C语言相结合,在Linux操作系统上设计并实现了一个轻量级的Web服务器程序.Lua脚本语言的引入,使Web服务器不仅易于配置和安装,而且可以在那些无法负担IIS的主机上顺畅地运行;还进一步提高了服务器的运行速度,并增强了服务器的灵活性和扩展性.     

Branded interface toolkits

Typical software companies want the applications they market to have a consistent look and feel, so as to brand or identify their particular family of products or product line. Current user interface (UI) implementation techniques serve this business need poorly, tending to treat each application as a unique, independent artifact sharing little, if any, UI implementation code with other applications. Coupled with the overwhelming complexity found in modern UI toolkits, this results in unnecessarily high development costs for interfaces, and is at odds with the need of software companies to devote their resources to value‐added application code rather than incidental user‐interface implementation. This paper presents a model for a domain‐based UI application framework that addresses these issues: consistency in a family of products, both in operation and presentation; reduced implementation costs; and rapid development times. Copyright © 2001 John Wiley & Sons, Ltd.     

Bringing Scheme programming to the iPhone—Experience

The iPhone SDK provides a powerful platform for the development of applications that make use of iPhone capabilities, such as sensors, GPS, Wi‐Fi, or Bluetooth connectivity. We observe that so far the development of iPhone applications has mostly been restricted to using Objective‐C. However, developing applications in plain Objective‐C on the iPhone OS suffers from limitations, such as the need for explicit memory management and lack of syntactic extension mechanism. Moreover, when developing distributed applications in Objective‐C, programmers have to manually deal with distribution concerns, such as service discovery, remote communication, and failure handling. In this paper, we discuss our experience in porting the Scheme programming language to the iPhone OS and how it can be used together with Objective‐C to develop iPhone applications. To support the interaction between Scheme programs and the underlying iPhone APIs, we have implemented a language symbiosis layer that enables programmers to access the iPhone SDK libraries from Scheme. In addition, we have designed high‐level distribution constructs to ease the development of distributed iPhone applications in an event‐driven style. We validate and discuss these constructs with a series of examples, including an iPod controller, a maps application, and a distributed multiplayer Scrabble‐like game. We discuss the lessons learned from this experience for other programming language ports to mobile platforms. Copyright © 2011 John Wiley & Sons, Ltd.     

Introducing QoS awareness in distributed programming: QTcl

A number of distributed applications require communication services with quality of service (QoS) guarantees. Building global‐scale distributed systems with predictable properties is one of the great challenges for computer systems engineering in the new century. Work undertaken within the Internet Engineering Task Force has led to the definition of novel architectural models for the Internet with QoS support. According to these models, the network has to be appropriately configured in order to provide applications with the required performance guarantees. In next‐generation networks, enabling applications to interact with the underlying QoS services is of primary importance. Hence, several special‐purpose application programming interfaces (APIs) have been defined to let applications negotiate QoS parameters across QoS‐capable networks. However, so far, none of these APIs are available in different operating environments. We believe that such features should be embedded in programming environments for distributed applications. In this work we present how we included QoS control features in Tcl, a programming language that has been widely adopted for the development of distributed multimedia applications. Our work has led to the implementation of QTcl, an extended Tcl interpreter that provides programmers with a new set of primitives, in full compliance with the standard SCRAPI programming interface for the RSVP protocol. QTcl in highly portable, in that it enables standard QoS negotiation to be performed in a seamless fashion on the most common operating systems. Copyright © 2003 John Wiley & Sons, Ltd.