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<title>Active Server Pages -- GoAhead WebServer</title>
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<TABLE WIDTH="535" BORDER="0" HEIGHT="60"><TR BORDERCOLOR="#FFFFFF" BGCOLOR="#FFFFFF"><TD><H1>Active Server Pages</H1><P> Active Server Pages (ASP) is a standard developed by Microsoft to serve
web pages with dynamic content. An ASP document has an ".asp"
extension and uses embedded scripting to insert dynamic data into the page
before it is sent to the user's browser. The GoAhead WebServer supports an open scripting
architecture where scripting engines can be selected at run-time. Individual pages can use multiple scripting engines if required.</P><P>To create an ASP script field in an ASP document, use the
<STRONG><%</STRONG>
and <STRONG>%></STRONG> ASP delimiters. For example, the following
JavaScript will output "Hello World" in place of the ASP delimited field:</P><P>
<PRE><h1>Today is <% write("Hello World"); %></h1></PRE><P></P><H3> Scripting Execution</H3><P>When a user's browser requests an ASP document, the
default URL handler determines if the page is an ASP document by examining the
document's file extension. An ".asp" extension indicates that ASP
processing is required. The document is read from the file system or ROM store
in a one-pass operation. Text before the ASP delimiters is copied directly to
the requesting browser. If ASP delimiters are found, the text between the
delimiters is passed to the relevant scripting engine for execution. The
resulting text is immediately passed back to the browser and the process
continues until the end of the document. This may differ a little to the
processing provided by other ASP implementations. Some systems buffer all ASP
output and permit scripted iteration over HTML tags. This is not supported as it
requires complete in-memory storage of the entire ASP document before returning to
the browser. </P><H3>Scripting Engine Selection</H3><P>To specify the scripting engine, use the
"language=" specifier at the beginning of the ASP script. The language
selection is <I>sticky</I>, meaning the language will remain
the default language until another "language=" keyword is encountered
at the start of an ASP script later in the page. For example:
<P>
<PRE>
<% language=javascript write("Query String: " + QUERY_STRING) %>
<% write("JavaScript is still the selected language"): %>
</PRE><P></P><P>If no "language=" is specified, the default
language is JavaScript. You should always specify the language in the
<HEAD></HEAD> section of your page for good practice.</P><H2> See Also</H2><P>
<A HREF="ejs.htm">JavaScript</A>,
<A HREF="goforms.htm">GoForms</A>⌨️ 快捷键说明
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