當再次訪問相同域名時,瀏覽器將對應Cookie信息隨請求壹起發送,Server端可讀取這些信息進行處理。
Cookie可設置過期時間,到期後由瀏覽器自動刪除;
當我們要返回頁面時,首先輸出如下:
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print "Content-type: text/plain\n"
它其實是壹個HTTP Header, 連續碰到兩個換行表示HTTP Header部分結束,剩余部分將被做為數據處理;
包含了Cookie後輸出大致如下:
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print "Content-Type: text/html"
print "Set-Cookie: session=12345"
print # 多加壹個換行表示HTTP Header部分結束
代碼:
setcookie.py
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#!/usr/bin/env python
import Cookie
import datetime
import random
expiration = datetime.datetime.now() + datetime.timedelta(days=30)
cookie = Cookie.SimpleCookie()
cookie["session"] = random.randint(0,1000000000)
cookie["session"]["domain"] = "localhost"
cookie["session"]["path"] = "/"
cookie["session"]["expires"] = \
expiration.strftime("%a, %d-%b-%Y %H:%M:%S PST")
print "Content-type: text/plain"
print cookie.output()
print "Cookie set with: " + cookie.output()
getcookie.py
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#!/usr/bin/env python
import Cookie
import os
print "Content-type: text/plain\n"
try:
cookie = Cookie.SimpleCookie(os.environ["HTTP_COOKIE"])
print "session = " + cookie["session"].value
except (Cookie.CookieError, KeyError):
print "session cookie not set!"