繁體中文当前位置: 首页 > 图文教程 > 网络编程 > ASP > javascript asp教程第八课--request对象
- ASP
- ASP+XML实例演练编程代码
- asp下利用XMLHTTP 从其他页面获取数据的代码
- asp下实现IP限制函数代码
- asp下IP地址分段计算函数
- asp身份证验证代码函数
- 用Asp隐藏文件路径，实现防盗链 的代码
- ASP生成柱型体，折线图，饼图源代码提供了
- 用asp实现网址和邮件地址的转换函数
- asp下最简洁的多重查询的解决方案
- asp下用datediff实现计算两个时间差的函数
- asp下实现记录集内随机取记录的代码
- asp下轻松实现将上传图片到数据库的代码
- [原创]站长感慨asp编程究竟何去何从
- fso asp生成静态html的代码
- ASP版实现cookies注入加速工具
- ASP实现网页打开任何类型文件都提示保存的方法附代码
- asp下使用数组存放数据的代码
- 一句话 asp木马加密版 彻底突破杀毒软件
- asp清空application的方法
- 使用asp下的adodb.stream 下载文件而不是打开
ASP 中的 javascript asp教程第八课--request对象
出处:互联网 整理: 软晨网（RuanChen.com） 发布: 2009-09-13 浏览: 128 ::
收藏到网摘: n/a
Request Object:
Request has five (5) Collections, one (1) Property, and one (1) Method. You'll use the Collections far more than the property or the method.
Request Collections:
Below is a table of the Request Collections and descriptions of how they are used.
| ClientCertificate | Request.ClientCertificate("Key[Field]") Client security info for SSL encryption |
| Cookies | Request.Cookies("cookieName") Holds cookie value stored on the client |
| Form | Request.Form("formName") Holds value sent via HTML Form |
| QueryString | Request.QueryString("keyName") Name/Value pair appended to the end of the URL |
| ServerVariables | Request.ServerVariables("variableName") Hold values sent in the HTTP Headers |
ClientCertificate:
Request.ClientCertificate is used with S.S.L. (Secure Sockets Layer). It is beyond the scope of this web site.
Cookies:
We will learn Request.Cookies and Response.Cookies together in Lesson 08. Please be patient.
Form:
Request.Form is probably the workhorse of the Request Collections. The first script is a repeat from Lesson 03.
<%@LANGUAGE="JavaScript"%> <% //No ASP Here, just a regular HTML Page %> <HTML> <STRONG>Type something into the text box and submit it.</STRONG> <FORM ACTION="script08a.asp" METHOD="Post"> <INPUT TYPE="Text" NAME="WebPageVariable"><BR> <STRONG>How Much Money do you make each month?</STRONG><BR> <SELECT NAME="monthlySalary"> <OPTION>Under $5,000,000</OPTION> <OPTION>Above $5,000,000</OPTION> <OPTION>Nobody's darn business.</OPTION> </SELECT><BR> <INPUT TYPE="Submit" VALUE="Submit"> </FORM> </HTML>
Click Here to run script08.asp in a new window. It posts information to script08a.asp which is found below. In turn, script08a.asp posts information to script08b.asp which is also found below.
<%@LANGUAGE="JavaScript"%>
<%
var WebPageVariable = new String( Request.Form("WebPageVariable") )
WebPageVariable = WebPageVariable.toUpperCase();
var monthlySalary = new String( Request.Form("monthlySalary") )
monthlySalary = monthlySalary.toLowerCase();
%>
<HTML>
The Web Page Variable you typed is: <%=WebPageVariable%> <BR>
The monthly salary you listed is: <%=monthlySalary%> <BR>
<FORM ACTION="script08b.asp" METHOD="Get">
<INPUT TYPE="hidden" VALUE="<%=monthlySalary%>" NAME="QueryVariable">
<STRONG>Click the button to see Query Strings</STRONG><BR>
<INPUT TYPE="submit" VALUE="Submit">
</FORM>
</HTML>
We'll be using Request.Form when we "Post" an HTML form to the server. Notice that the NAME attribute in the HTML form corresponds to the "name" in
QueryString:
We'll be using Request.QueryString when we use an HTML form to "Get" a page from the server. Request.QueryString() is very similar to Request.Form(). Take a look at script08b.asp which I printed below.
<%@LANGUAGE="JavaScript"%>
<%
var QueryVariable = new String( Request.QueryString("QueryVariable") )
%>
<HTML>
The QueryString Value is: <%=QueryVariable%> <BR>
<%
if (QueryVariable != "Lesson 08's new Query!") { QueryVariable="Lesson 08's new Query!" QueryVariable=escape(QueryVariable)
%>
<A HREF="script08b.asp?QueryVariable=<%=QueryVariable%>">Click Here</A>
for the link to <I>script08b.asp?QueryVariable=<%=QueryVariable%></I>
<% } //closing bracket for if statement.
%>
</HTML>
If you haven't already, Click Here to run script08.asp in a new window. Cycle through all the forms and links, and then come back.
You can use Request.QueryString in two different ways. You can either use an HTML form to "Get" a page from the server, which will generate a query string. Or you can manually build a query string and add it to the backside of a link. We'll dissect script08b.asp from top to bottom.
var QueryVariable = new String( Request.QueryString("QueryVariable") )
The line above in script08b.asp corresponds to the line below from script08a.asp
<INPUT TYPE="hidden" VALUE="<%=monthlySalary%>" NAME="QueryVariable">
The NAME="someName" in the HTML form becomes the
About half way into script08b.asp are the lines I reprinted below.
<%
if (QueryVariable != "Lesson 08's new Query!") { QueryVariable="Lesson 08's new Query!" QueryVariable=escape(QueryVariable)
%>
We've already converted Request.QueryString() into a JavaScript string at the top of the script. So, now we can do a string comparison.
If the QueryVariable hasn't already been set equal to "Lesson 08's new Query!" then we do that. Then we use the
In lesson 14 we'll see a better way to encode URL's. When we study the Server Object, we'll see Server.URLEncode(). But for now, just know that escape() works.
You can have more than one QueryString on each page. If you lose count of your QueryStrings, then you use
The Request Shortcut:
Request.Form() and Request.QueryString() share a shortcut.
ServerVariables:
Server Variables represent the HTTP Headers sent to the server by the client. I won't demonstrate them all, because there are too many.
<%@LANGUAGE="JavaScript"%>
<HTML>
<TABLE BORDER="1">
<TR><TD>ALL_RAW</TD>
<TD><%=Request.ServerVariables("ALL_RAW")%></TD></TR>
<TR><TD>REMOTE_ADDR</TD>
<TD><%=Request.ServerVariables("REMOTE_ADDR")%></TD></TR>
<TR><TD>HTTP_USER_AGENT</TD>
<TD><%=Request.ServerVariables("HTTP_USER_AGENT")%></TD></TR>
<TR><TD>URL</TD>
<TD><%=Request.ServerVariables("URL")%></TD></TR>
</TABLE>
</HTML>
Click Here to run the script in a new window.
Demonstrated above are four (4) server variables. There are (give or take) about 50 server variables available. You can look up the full list of server variables for yourself on the internet.
Misc. Notes:
Request.BinaryRead() is the lone method and TotalBytes is the lone property.
评论 (0) All
