前几天在博问中,看到有人提到了有关session的问题,决定自己整理写一下有关session的原理!说起session,cookie必须是要谈的!
目录
一、无形之中我们使用的cookie:
使用浏览器浏览网页时,当你要登陆时,网页上有一个记住密码或自动登陆的选项,当你选择时,你就使用了Cookie。那么在下次访问该网站时,你可能就已经自动地登陆了,而不需要从重输入用户名和密码
二、cookie技术的组成
三、cookie的工作原理
在了解了cookie技术的组成之后,我们来看看cookie是怎么工作的。下面就以主机A中的浏览器访问网站xxx作为例子来分析cookie的工作原理吧。
首 先主机A使用浏览器上网,当主机A第一次访问xxx网站时,当请求报文到达xxx的Web服务器时,该Web服务器将产生一个唯一识别码(例 如:12345),并以此作为索引在它的后端数据库中产生一个表项,并用Set-cookie:首部行和刚才产生的值为设置HTTP响应报文的首部。这样 在HTTP响应报文的首部,我们就可以看到这样的一个首部行——Set-cookie: 12345.
当主机A的浏览器收到该HTTP响应报文时,它会看到Set-cookie:首部,然后浏览器在它的本地cookie文件上加入一行,其中包括Set-cookie:首部行中的识别码。
由于主机A的cookie文件已经有了用于xxx网站的表项,因此当主机A的浏览器继续浏览xxx网站时,每请求一个Web页面,其浏览器就会 从它的cookie文件中获取到xxx网站的识别码,并放入HTTP请求报文中cookie首部行中,即加入了首部行Cookie: 12345。
当xxx网站的服务器收到该包含Cookie首部行的HTTP请求报文后,服务器通过查询后端服务器,确定cookie标识码对应的用户,从而可以直接知道用户的信息(即知道确实有一个这样的用户,不久前登陆过该网站)。
注意,在cookie的方式下,xxx网站的服务器可以跟踪主机A在该站点的活动,xxx Web站点并不需要知道主机A的用户是谁,但是,它确切地知道用户12345访问了哪些页面,按照什么顺序,在什么时间。
简单点来说,cookie用于标识用户,用户首次访问站点时,可能需要提供一个用户标识,但在后继的访问中,浏览器向服务器传递一个 cookie首部,供服务器识别该用户。因此cookie可以在无状态的HTTP上建立一个用户会话层,允许服务器通过用户与应用程序之间的会话对用户进 行验证。
java中的response响应中加入cookie:
Cookie cookie = new Cookie("JSESSIONID", "123456");
cookie.setPath("/test");
response.addCookie(cookie);
java中的request请求中得到cookie:
Cookie[] cookies = request.getCookies();
for (Cookie cookie : cookies) {
String cookieName = cookie.getName();
String cookieValue = cookie.getValue();
System.out.println(cookieName + ", " + cookieValue);
}
1、Session的概念
使用Cookie和附加URL参数都可以将上次请求的状态信息传递到下一次请求中,但是如果传递的状态信息较多,将极大降低网络传输效率和增大服务器端程序处理的难度。Session技术是一种会话状态保存在服务器端的技术,它可以比喻成是医生发给病人的病历卡和医院为每个病人保留的病历档案的结合方式。客户端需要接收、记忆和回送Session的会话标示号,Session可以且通常是借助Cookie来传递会话标示号。
2、Session的跟踪会话机制
Servlet API规范中定义了一个HttpSession接口,HttpSession接口定义了各种管理和操作会话状态的方法。HttpSession对象是保持会话状态信息的存储结构,一个客户端在WEB服务器端对应一个各自的HttpSession对象。Web服务器并不会在客户端开始访问它时就创建HttpSession对象,只有客户端访问某个能与客户端开启会话的Servlet程序是,Web应用程序才会创建一个与该客户端对应的HttpSession对象。Web 服务器为HttpSession对象分配一个独一无二的会话标示号,然后在响应消息中将这个会话标示号传递给客户端。客户端需要记住会话标示 号,并在后续的每次访问请求中都把这个会话标示号传送给Web服务器,Web服务器程序依据回传的会话标示号就知道这次请求的客户端发出的,从而选择与之 对应的HttpSession对象。
3、Session的跟踪机制
Web 应用程序创建与某个客户端对应的HttpSession对象后,只要没有超出一个限定的空闲时段,HttpSession对象就驻留在Web 服务器内存之中,该客户端此后访问任意的servlet程序时,它们都使用与客户端对应的那个已存在的Httpsession对象。HttpSession 接口中专门定义了一个SetAttribute方法将对象存储到HttpSession对象中,还定义了一个 getAttribute方法来检索存储在Httpsession对象中的对象,存储进Httpsession对象中的对象可以被属于同一个会话的各个请 求的处理程序共享。Session是实现网上商城的购物车的最佳方案,存储在某个客户Session中的一个集合对象就可充当给客户的一个购物车。
4、Session的超时管理
Web服务器无法判断当前的客户端浏览器是否还会继续访问,也无法检测客户端浏览器是否关闭,所以,即使客户已经离开或关闭了浏览器,Web服务器还要保留与之对应的Httpsession对象。随着时间的推移而不断增加新的访问客户端,Web服务器内存中将会因此积累起大量的不断不在使用的Httpsession对象,并将最终导致服务器内存耗尽。Web服务器采用“超时限制”的办法来判断客户端是否还在继续访问,如果某个客户端在一定的时间之内没有发出后续请求,Web服务器则认为客户端已经停止了活动,结束与该客户端的会话并将与之对应的Httpsession对象变成垃圾。如果客户端浏览器超时后再发出访问请求,Web服务器则认为这是一个新的会话开始,将为之创新的HttpSession对象和分配新的会话标示号。
session中存储数据:
String username = request.getParameter("username");
HttpSession session = request.getSession();
System.out.println(session.getId());
session.setAttribute("username", username);
session中得到数据:
HttpSession httpSession = request.getSession();
String username = (String)httpSession.getAttribute("username");
我们创建一个项目来分析session的原理:
一、创建一个主页index.jsp:
清除浏览器所有cookie,访问url:http://localhost:8080/SessionTest/
详细的请求头部:
GET /SessionTest/ HTTP/1.1
Host: localhost:8080
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:44.0) Gecko/20100101 Firefox/44.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: keep-alive
详细的响应头部:
HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
Set-Cookie: JSESSIONID=5973D26B6164CDDAFF190965C0B4677C; Path=/SessionTest/; HttpOnly
Content-Type: text/html;charset=ISO-8859-1
Content-Length: 418
Date: Tue, 15 Mar 2016 10:25:12 GMT
保存在浏览器的cookie:
aaarticlea/png;base64,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" alt="" />
说明:
二、创建ContractListServlet,以响应index.jsp的提交
String username = request.getParameter("username");
HttpSession session = request.getSession();
System.out.println(session.getId());
session.setAttribute("username", username);
Cookie cookie = new Cookie("JSESSIONID", "123456");
cookie.setPath("/test");
response.addCookie(cookie);
request.getRequestDispatcher("/list.jsp").forward(request, response);
填写内容linux,点击提交:url为http://localhost:8080/SessionTest/ContractListServlet?username=linux
详细的请求头部:
GET /SessionTest/ContractListServlet?username=linux HTTP/1.1
Host: localhost:8080
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:44.0) Gecko/20100101 Firefox/44.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://localhost:8080/SessionTest/
Cookie: JSESSIONID=5973D26B6164CDDAFF190965C0B4677C
Connection: keep-alive
详细的响应头部:
HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
Set-Cookie: JSESSIONID=123456; Path=/test
Content-Type: text/html;charset=ISO-8859-1
Content-Length: 331
Date: Tue, 15 Mar 2016 10:29:25 GMT
保存的cookie:现在有两个了
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" alt="" />
三、 只要我们访问的url是这样的形式http://localhost:8080/cookiePath/xxx/xx,浏览器都会携带cookie信息去发送请求的:
由于上述我们已经有了两个cookie,它们的path分别为, /test和/SessionTest,于是测试访问url:http://localhost:8080/test/jjii
虽然报错404,但是cookie信息仍旧在请求当中:
GET /test/jjii HTTP/1.1
Host: localhost:8080
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:44.0) Gecko/20100101 Firefox/44.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Cookie: JSESSIONID=123456
Connection: keep-alive
关闭浏览器,cookie被自动清除,所以用户再次的请求,浏览器没有找到cookie,会像上述第一次访问一样,请求中没有cookie的头部。
四、 我们改动ContractListServlet的代码,在response中另外再增加两个cookie2:以下是加了之后的代码
Cookie cookie = new Cookie("JSESSIONID", "123456");
cookie.setPath("/test");
Cookie cookie3 = new Cookie("JSESSIONID", "123456");
cookie3.setPath("/SessionTest/");
Cookie cookie2 = new Cookie("df", "456789");
cookie2.setPath("/");
response.addCookie(cookie);
response.addCookie(cookie2);
response.addCookie(cookie3);
再次访问到从头开始访问到url:http://localhost:8080/SessionTest/ContractDetailServlet
详细的请求头部:
GET /SessionTest/ContractListServlet?username=linux HTTP/1.1
Host: localhost:8080
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:44.0) Gecko/20100101 Firefox/44.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://localhost:8080/SessionTest/
Cookie: JSESSIONID=3EF72ED7EC55DA676714F773E9110DB9
Connection: keep-alive
详细的响应头部:
HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
Set-Cookie: JSESSIONID=123456; Path=/test
df=456789; Path=/
JSESSIONID=123456; Path=/SessionTest/
Content-Type: text/html;charset=ISO-8859-1
Content-Length: 321
Date: Tue, 15 Mar 2016 12:04:00 GMT
浏览器中的cookie有三条:
结果分析:
五、接着上面的程序,我们添加list.jsp到ContractDetailServlet的请求:http://localhost:8080/SessionTest/ContractDetailServlet
详细的头部请求:
GET /SessionTest/ContractDetailServlet HTTP/1.1
Host: localhost:8080
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:44.0) Gecko/20100101 Firefox/44.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://localhost:8080/SessionTest/ContractListServlet?username=linux
Cookie: JSESSIONID=123456; df=456789
Connection: keep-alive
详细的头部响应:
HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
Set-Cookie: JSESSIONID=D0ECF2D2EF3946CBBB34BC7E4A426D94; Path=/SessionTest/; HttpOnly
Content-Length: 0
Date: Tue, 15 Mar 2016 12:06:19 GMT
浏览器中的cookie有三条:
结果分析:
以上是我个人对了session的理解,不正确的地方,还望大家斧正!
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