以購物網(wǎng)站Amazon.com為例

// (a)客戶端:首次請(qǐng)求Amazon.com根頁面 GET / HTTP/1.0 Host: www.amazon.com// (b)服務(wù)器:將客戶端重定向到一個(gè)電子商務(wù)軟件的URL上 HTTP/1.1 302 Found Location: http://www.amazon.com:80/exec/obidos/subst/home/redirect.html// (c)客戶端:對(duì)重定向的URL發(fā)送一個(gè)請(qǐng)求 GET /exec/obidos/subst/home/redirect.html HTTP/1.0 Host: www.amazon.com// (d)服務(wù)器:在響應(yīng)上貼上兩個(gè)會(huì)話cookie,并將用戶重定向到另一個(gè)URL,這樣客戶端就會(huì)用這些附加的cookie再次發(fā)出請(qǐng)求 HTTP/1.1 302 Found Date: Sun, 02 Dec 2001 03:20:47 GMT Set-cookie: session-id=002-1145265-8016838; path=/; domain=.amazon.com;expires=Sunday, 09-Dec-2001 08:00:00 GMT Set-cookie: session-id-time=1007884800; path=/; domain=.amazon.com;expires=Sunday, 09-Dec-2001 08:00:00 GMT// (e)客戶端發(fā)送新的URL(胖URL,將某些狀態(tài)嵌入到URL中去了), 同時(shí)傳送2個(gè)附加的cookie GET /exec/obidos/subst/home/redirect.html/ 002-1145265-8016838 HTTP/1.0 Host: www.amazon.com Cookie: session-id=002-1145265-8016838; session-id-time=1007884800// (f)服務(wù)器重新定向到home.html頁面,并附加另外兩個(gè)cookie HTTP/1.1 302 Found Date: Sun, 02 Dec 2001 03:45:40 GMT Set-Cookie: ubid-main=430-8248051-6231206; path=/; domain.amazon.com;expires=Tuesday, 01-Jan-2036 08:00:01 GMT Location: http://www.amazon.com/exec/obidos/subst/home/home.html/002-1145265-8016838 Set-cookie: x-main="h0...Bf; path=/; domain=.amazon.com;expires=Tuesday, 01-Jan-2036 08:00:01 GMT// (g)客戶端獲取home.html頁面并將所有四個(gè)cookie都發(fā)送出去 GET /exec/obidos/subst/home/home.html/002-1145265-8016838 HTTP/1.0 Host: www.amazon.com Cookie: session-id=002-1145265-8016838; session-id-time=1007884800; ubid-main=430-8248051-6231206; x-main="h0...Bf"// (h)服務(wù)器返回頁面內(nèi)容

參考《HTTP權(quán)威指南》P288~P289

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