【正文】 equest object and the simulation of the POST and the GET HTTP mands. I39。ve added the ResolveAmbiguity method to the CAspParser class. Each time that the script mand begins with = it replaces the character with a . and Web server name, such as a href=Click here/a A More Complicated Page So far I39。t be too concerned. Try viewing the same document through Inter Explorer and HTTP and you39。t support. Figure 6 The Custom Browser versus Inter Explorer?? Consider a page like the following, which is nearly identical to the previous one except for a statement. html body % x=1 % % Hello, world! % hr % % The value of X is %= x% /body /html Figure 7 shows that the End method correctly stops the processing. If you39。170。170。s no need to make the internal buffer available to the scripts in the ASP page. In fact, the ASP Response object doesn39。re writing dual pages to be used on the Web as well as locally on a CD. When you invoke the Write method on , the text you pass in is added to an internal member variable that39。s no particular reason for you to use a custom object that mimics the ASP39。re using them in your clientside ASP pages. If you39。re used to on the server. Now let39。s see how it works step by step on a very simple ASP page: html body % X=1 % % Hello, world! % hr The value of X is %= X% /body /html The CAspParser class initializes the script control by setting the script language to VBscript (this is not strictly necessary since the scriptControl already defaults to it), and adding a brand new instance of the object to the namespace. The control then passes to the method ParseTextToFile. It receives the name of the ASP file, verifies it has an ASP extension, and reads in all of its content. I used the for clarity only (see Figure 4). Using the CreateFile API or other I/O technique could give you better performance. The string with all the ASP content is then parsed for %161。s a very mon technique in scripting. Incidentally, this is the same technique that allows IIS to inject the true ASP object model in the scripting context of a serverside ASP page. This workaround also makes it possible for Windows script Host (WSH) scripts to rely on a systemprovided Wscript object. Call in Action When the browser39。170。s keywords and global resources such as variables, objects, and subroutines. Behind each name (such as MsgBox) there39。s article, Active scripting with Perlscript, in the August 1999 issue of MIND, explores the use of Perl with ASP. When it es to using the scriptControl you need to do three things: set up the language, add as many objects as you want to the script namespace, and execute the script code. In my special edition browser, I set the language to VBscript during the form load event. At the same time, I create instances of all the objects I want to be visible to the script engine at runtime. Named items visible to the parser at runtime is a concept that warrants further explanation. The whole set of named items forms the script39。a downloadable ponent (see or use the raw Windows script COM interfaces. For a primer, look at the Extreme C++ column in the August 1997 issue of Microsoft Inter Developer. Since I39。s Form and ServerVariables collections. Later, I also added some special features such as new environment variables and new offlineonly objects, including . The key questions concern how you simulate the Response or Request object and how you run all the script code that an ASP file contains. To execute script code, you can either take advantage of the Microsoft script Control161。t mean that you cannot use a unified, yet ASPbased approach for the concurrent development of products that deliver content through different media (like the Web and CDs). Offline pages consumed without the intervention of the Web server are normally much simpler and don39。s namespace when the parser is about to process the content of the various code blocks. To obtain an ASP parser that works outside the Web server, you should provide a replacement for these objects, which means building a clientside ASP object model. A Clientside ASP Object Model One of the problems with Web applications is the inability to maintain state when working over HTTP. State is the ability to associate variables and objects with a particular user. A tool to store individual settings and resources can solve the problem. This is what the Session and Application objects provide, albeit at different levels. But you don39。170。170。ve clicked the Go button, the browser detects whether you39。ve divided the client area into three blocks: one for the actual HTML rendering, one for the original ASP text, and one for the expanded HTML text. Figure 2 shows the code for the browser. Figure 1 The Custom ASP Browser?? During the form39。ll discuss this further next month.) Given these requirements, to deal with ASP pages offline you need a customized version of the browser. While subclassing Inter Explorer or Netscape Communicator is always possible, I suggest you write a brand new browser from scratch using existing Web browser technology such as the Microsoft WebBrowser control. While I39。s Role To emulate ASP while working offline, you need a little help from the browser. Basically, the browser must be able to detect whether the page to which it39。s code shows the potential of this approach and works with typical ASP pages, though it is not prehensive. I won39。ll show you how to emulate the behavior of the ASP Response object. Next month, I39。s machine, and the only product that could be supplied with the CDs was Microsoft Inter Explorer or a custom Web browser. ASP looked like the natural choice for the Web side of the project, but what about the CD? 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