) p4 ]% N, V' q+ M0 \* [一、什么是WSH? ( R" ]; [- Z1 E* Y
$ R% z8 W% m# L4 j+ R' O WSH是Windows Scripting Host(Windows脚本主机)的缩略形式。WSH这个概念最早出现于Windows98操作系统,是一个基于32 位 Windows 平台、并独立于语言的脚本运行环境。比如:你自己编写了一个脚本文件,如后缀为 .vbs 或.js 的文件,然后在 Windows 下双击 并执行它,这时,系统就会自动调用一个适当的程序来对它进行解释并执行,而这个程序,就是Windows Scripting Host,程序执行文件名为 Wscript.exe (若是在DOS命令提示符下,则为Cscript.exe)。 ! _* T. l# r- S" \6 w+ e' V$ { , d0 m9 c1 S- f; \. T2 S% o8 q0 N/ z 8 ~7 w D$ l1 e: u9 ` F2 i! P, M: D6 l8 c( i! [8 ~$ ~4 m
想知道自己的机器上有没有WSH吗?查看一下你的机器里有没有“Wscipt.exe”或者“Cscript.exe”这两个文件就可以了。如果找到,恭 喜你!你已经安装了WSH。否则,自己手动安装吧: , o5 E% Y# t) b- V" K) Z8 f
4 x# Z! g0 w2 J$ U* [& E 在Windows98环境下,WSH是作为操作系统的一个组件自动安装的,如果不慎丢失了这个组件,可以从依次打开“控制面板-->添加/删除程序--〉Windows安装程序--〉附件”,然后将“Windows ScriptingHost”前的划上“√”,再确定即可完成WSH组件的安装。 & y7 ]/ q0 E7 @( _6 o
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6 `2 d6 I' X& K7 w8 V 二、脚本语言与WSH的关系 - i5 k/ s1 ?3 x
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大家知道,脚本语言(包括javascript和VBscript语言等)经常会被植入网页之中(其中包括 HTML 页面客户机端和 ASP页面服务器端) 。对于植入 HTML 页面的脚本,其所需的解析引擎会由 IE 这样的网页浏览器载入;对于植入 ASP页面的脚本,其所需的解析引擎会由 IIS( Internet Information Services)提供。而对于出现在 HTML 和ASP 页面之外的脚本(它们常以独立的文件形式存在),就需要经由 WSH 来 处理了。需要说明的是:WSH 要想正常工作,还要安装IE 3.0或更高版本的 IE,因为 WSH 在工作时会调用 IE 中的 VBScript 和 javascript 解析引擎。[未结束][iduba_page]在这些被植于网页的脚本语言中,绝大多数是与网络安全无关的。但也有少数别有用心的好事者,把一些严重危及网络安全的代码(我们常常称之为“恶意代码”,他们通常都要通过修改注册表达到“恶意”的目的!),混放在正常的脚本之中,常常让我们防不胜防。但是,如果我们了解一点关于脚本语言的知识,这些“伎俩”都是非常容易识破的。还是让我们从几个简单 的实例开始吧…… - e. t# Q9 E+ ?, a0 v, m/ F }6 `5 e# r1 ?
[0 ~" n' t9 Z ! |4 q. h: U' A" B8 F 三、WSH应用举例 4 n ]% _, h+ e4 `; d) F# l7 l 3 @ E3 c- w/ z$ L9 S WSH可以处理脚本程序,怎样阅读和编写WSH的脚本源文件呢?只要你有一点Basic(会VB的编程更好,呵呵)语言的基础,学会看懂WSH脚本语言的程序并不是一件难事。去C:WINDOWSSAMPLESWSH目录以下将看看吧!里面提供了几类经典的脚本例子,而且分别提供了VBScript和 javascript两个版本,我们只要用记事本打开它们并仔细研究就不难学到一些基本的WSH应用。 * }6 L8 u$ @+ W: t7 O ?7 w& o6 f
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你只需在记事本中依次输入以下每个实例中的代码,并保存为相应的“*.vbs”文件,双击这个文件,你就可以看到相应的效果了。; n' a' w. C: X. i: L. }
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# b& C! ~" \# @8 k/ d 8 S7 ]4 E" Q+ Y! [0 ]3 P2 eQ: How do I open script files? Trying the above solution makes Windows XP throw an error?5 U% h' M+ V, K* F, Y5 y. x
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A:This is similar to the *.js association problem. Some machines seem to,for some reason, lose their *.vbs association. It's not that the filesopen with dreamweaver or whatever -- it's that the machine just doesn'tknow how to run them. If you have a scheduled task, "Could not run"will appear in the status column." y9 ^: ]. }- j$ J z
; z+ { ]+ `& A! GSo, you're a smart person andread through the FAQ. You find the *.js extension problem, and you trythat fix: you run it as "wscript c:\path\to cript.vbs". But that, inturn, produces a pop-up error, this time a "Windows Scripting Host"error: "There is no script engine for file extension '.vbs'." So, forsome reason, wscript doesn't even know what to do with *.vbs files.8 e% n3 d; e- u: T
9 y& w! @6 e& s( W2 |5 _The solution to this problem is to run the script as:0 ?5 x; Z7 J' T' `1 B
, }8 C) n1 Z2 D3 Q4 ^wscript //e:vbscript c:\path\to cript.vbs 6 q: f; [8 f7 N$ ^+ c- [ # u' G8 _: m8 e" |1 OThe "//e:vbscript" tells wscript to use the vbscript engine to parse the script. It will then run correctly. ; k! k6 F6 { }/ T1 p7 D$ L. M) V- j! W/ ^9 W* s
A few alternative solutions, perhaps easier are: ) g3 u. i# j6 N) E# s( uRenameit .vbe (VBScript Encoded Script File). Not sure if this is a bad idea,but it seemed to work for some scripts. Make a new association for VBS.Open up my computer, select Tools menu-> Folder Options, and go tothe File Types tab. There probably isn't a VBS association listed ifyou have this problem. Select New, type in VBS, and hitAdvanced>>. Then, from the pull-down menu, select "VBScriptScript File". Making this selection automatically takes care of theassociation, along with the //e:vbscript problem. This is probably the"correct" solution... ) L* u$ Y3 Q% L( x, D% d! u4 m
This problems usually occurs only on WindowsXP machines, but the cause is not known. A Microsoft KB article on thisissue can be found here. Thanks goes to Bob_2k for writing this FAQentry.