function fixDate(date) { var base = new Date(0); var skew = base.getTime(); if (skew > 0) date.setTime(date.getTime() - skew); }
var expiryDate = new Date(); fixDate(expiryDate); expiryDate.setTime(expiryDate.getTime() + 365 * 24 * 60 * 60 * 1000); setCookie("authorizationLevel", 2, expiryDate);
</SCRIPT> </HEAD> <BODY> A cookie which is valid for a year has been created for this page. </BODY> </HTML> Listing 25.9 Writing and Reading Cookies <HTML> <HEAD> <TITLE>Writing and Reading Cookies</TITLE> <SCRIPT LANGUAGE="javascript">
function getCookie(name) { var cName = name + "="; var dc = document.cookiess; if (dc.length>0) { begin = dc.indexOf(cName); if (begin != -1) { begin += cName.length; end = dc.indexOf(";", begin); if (end == -1) end = dc.length; return unescape(dc.substring(begin,end)); } } return null; }
</SCRIPT> </HEAD> <BODY> Type in your user id, and then click the Create Cookie button. A cookie will be created for you. <BR> <FORM> User ID: <INPUT TYPE=TEXT NAME=UserID> <BR> <INPUT TYPE=BUTTON value="Create Cookie" onClick='setCookie("UserID", document.FORMs[0].UserID.value)'> <BR> Click the Read Cookie button to display the cookie. <INPUT TYPE=BUTTON value="Read Cookie" onClick='alert(getCookie("UserID"))'> </FORM> </BODY> </HTML> Listing 25.10 Deleting a Cookie <SCRIPT LANGUAGE="javascript"> function deleteCookie (name, path, domain) { if (getCookie(name)) { document.cookiess = name + "=" + ((path==null) ? "" : "; path=" + path) + ((domain==null) ? "" : "; domain=" + domain) + "; expires=Thu, 01-Jan-70 00:00:01 GMT"; } }
function getCookie(name) { var cName = name + "="; var dc = document.cookiess; if (dc.length>0) { begin = dc.indexOf(cName); if (begin != -1) { begin += cName.length; end = dc.indexOf(";", begin); if (end == -1) end = dc.length; return unescape(dc.substring(begin,end)); } } return null; } </SCRIPT> Checking If the Browser Can Accept Cookies Using javascript 用javascript来检查用h览器是否支持cookie技? Listing 25.11 Checking If the Browser Can Accept Cookies Using javascript <HTML> <HEAD> <SCRIPT LANGUAGE="javascript"> document.cookiess="test=OK";
function getCookie(name) { var cName = name + "="; var dc = document.cookiess; if (dc.length>0) { begin = dc.indexOf(cName); if (begin != -1) { begin += cName.length; end = dc.indexOf(";", begin); if (end == -1) end = dc.length; return unescape(dc.substring(begin,end)); } } return null; }
if (getCookie('test')==null) alert("Please change your browser to accept cookies."); else alert("Browser accepts cookies");
</SCRIPT> </HEAD>
<BODY> The page content </BODY> </HTML> Checking If the Browser Accepts Cookies Without javascript 不用javascript来检查用h览器是否支持cookie技术！Q！ Another way to check if the browser is willing to accept cookies is by creating a cookie on one page and then immediately redirecting the user to a second page. In the second page you can then try to read the cookies. The code in Listing 25.12 uses the <META> tag to create a cookie called "test" and then redirects the browser to a second page called checkCookie.jsp (in Listing 25.13). Listing 25.12 Checking Browser Cookie Acceptance with Redirection <HTML> <HEAD> <META HTTP-EQUIV="Set-Cookie" CONTENT="test=ok;"> <META HTTP-EQUIV="Refresh" CONTENT="0;URL=checkCookie.jsp"> </HEAD> </HTML> In the second page, implemented using ASP in this example, you try to read the same cookie using the code in Listing 25.13. Listing 25.13 Reading the Cookies in the Browser Cookie Acceptance Test <% If Request.cookiesss("test") <> "" Then Response.Write "Cookies accepted." Else Response.Write "Cookies not accepted." End If %> Even though the code in this example only sends a message to the user telling him or her whether or not his or her browser accepts cookies, you can modify it to suit your needs. For instance, you can transfer the user to a warning page if the cookies are not accepted. 了解一个cookie文g里面的内容的含义Q！Q！Q！Q? 3.5 What are all those entries in my cookies.txt file?
The layout of Netscape's cookies.txt file is such that each line contains one name-value pair. An example cookies.txt file may have an entry that looks like this: .netscape.com TRUE / FALSE 946684799 NETSCAPE_ID 100103 Each line represents a single piece of stored inFORMation. A tab is inserted between each of the fields.
From left-to-right, here is what each field represents:
domain - The domain that created AND that can read the variable. flag - A TRUE/FALSE value indicating if all machines within a given domain can access the variable. This value is set automatically by the browser, depending on the value you set for domain. path - The path within the domain that the variable is valid for. secure - A TRUE/FALSE value indicating if a secure connection with the domain is needed to access the variable. expiration - The UNIX time that the variable will expire on. UNIX time is defined as the number of seconds since Jan 1, 1970 00:00:00 GMT. name - The name of the variable. value - The value of the variable. 好现在还看看其它斚w的，有趣的一面！ 在window当中cookie一般存攑֜C:\Documents and Settings\wwwfox\Cookies wwwfox为我dxp的̎?当然׃ie版本不同存放的位|也有所不同,你可以到微Y官方|站上去查看,当然最好的Ҏ是搜一下Cookie文g可以知道具体在存放在那里了, 下面是Cookies下面的一个Cookie文gwwwfox@cgi-bin.txt内容? advpost 0 219.239.245.203/cgi-bin/ 1536 1276665728 29789832 2326352352 29783688 对应Ҏ advpost--->cookie
.getName 0--->cookie
.getvalue() 1536-->cookie
.getMaxAge()如返回ؓ-1表示关闭览器cookie失? 后面是创徏日期,失效日期 创徏旉,失效旉 现在教你怎么用jsp~程查看上网时网站给你创建的cookie文gQ? 问题一.cookiess只能由它创徏的网站访问，那么我们怎么能够在自q电脑是运行自q服务器查看出来呢Q如果能成那是cookieƺ骗。R入别人网站的Ҏ? 好通过CZ来演C：, wwwfox@csdn[2].txt当然它的命名? 你的用户电脑帐号@产生的COOKIE的网|件所在的WEB目录[COOKIE改变的次数].txt wwwfox电脑帐号在访问csdn|站时是不会发送到csdn|站上去的，也就是只能在我的电脑wwwfox帐号上用这个cookie其hQ帐P是不能用的。? 在C:\Documents and Settings\wwwfox\Cookies下我有一个登录csdn|站时由它创建的cookie wwwfox@csdn[2].txt的内ҎQ? ABCDEF hbWhkUhCWfRTUyeAVO5k79qTBFZXtGV2qfwAROv%252fvVk9qF3rfkcZQbl1IdMsBxhy15Y%252fqwN2XiLyTy%252fDGuW4LY7zZll16huuVbnJ0CEun26I%252f2bynXLPd2Ymq%252bn2Mt11pSP5w3%252fZNXt9ZJEp79VMCw%253d%253d csdn.net/ 1536 3743055744 29786511 2555961280 29783695 //////////////////////////// 在C:\Program Files\Apache Software Foundation\Tomcat 5.5\webapps\test新徏一个文件checkCookie.jsp <%@page pageEncoding="gb2312" %> <% Cookie[] cookie=request.getCookies(); out.println("this is
www.csdn.net/<br>"); out.println("<br>"); for(int i=0;i<cookie.length;i++) { if(cookie
.getName().equals("ABCDEF")) { String name=cookie
.getName(); String value=cookie
.getvalue(); int maxage=cookie
.getMaxAge(); out.println("name="+cookie
.getName()+"<br>"); out.println("value="+cookie
.getvalue()+"<br>"); out.println("maxage="+cookie
.getMaxAge()+"<br>"); //out.println("setMaxAge?0"); //cookie
.setMaxAge(30); //out.println("之后为maxage="+cookie
.getMaxAge()+"<br>"); out.println("domain="+cookie
.getDomain()+"<br>"); out.println("secure="+cookie
.getSecure()+"<br>"); out.println("path="+cookie
.getPath()+"<br>"); } } %> 好现在访问一? http://localhost:8080/test/checkCookie.jsp是不是显C： this is
www.csdn.net 而没有取到|因ؓ只能在它的domain下能讉K到这个cookie 好现在我们来 把C:\WINDOWS\SYSTEM32\DRIVERS\etc下面的hosts.sam打开修改其中? 127.0.0.1 hostname ?27.0.0.1
www.csdn.net 在这里你q可以再d多行和上面相访的键值对Q这个比外网的dsn优先U高所以它先把www.csdn.net解释成本地的127.0.0.1所以你可以由q个讉K了，q也可以解释Z么我们可以在ie敲http://localhsot的原因，q里localhost你可随便Ҏ你喜Ƣ的名称. 保存 修改conf/servlet.xml当中的端口ؓ80端口 <Connector port="80" maxHttpHeaderSize="8192" maxThreads="150" minSpareThreads="25" maxSpareThreads="75" enableLookups="false" redirectPort="8443" acceptCount="100" connectionTimeout="20000" disableUploadTimeout="true" /> 好现在启动tomcat讉Khttp://www.csdn.net/test/checkCookie.jsp 得到l果啦： this is
www.csdn.net