设置、读取、删除cookie

时间:2022-05-24 04:32:40

刚才用虚拟机当服务器,开了两个服务(端口号不同),发现同样的cookie;在别的网站下面没有发现该cookie。说明cookie只是对应相应的网站的(自己得出的结论)

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前端js:

1,设置cookie:
  document.cookie = 'name=zhangsan'
2,读取cookie:
  console.log(document.cookie)(直接读就行)
3,删除cookie:
  为了删除指定名称的cookie,可以将其过期时间设定为一个过去的时
//设置cookie
function setCookie(cname, cvalue, exdays) {
var d = new Date();
d.setTime(d.getTime() + (exdays*24*60*60*1000));
var expires = "expires="+d.toUTCString();
document.cookie = cname + "=" + cvalue + "; " + expires;
}
//获取cookie
function getCookie(cname) {
var name = cname + "=";
var ca = document.cookie.split(';');
for(var i=0; i<ca.length; i++) {
var c = ca[i];
while (c.charAt(0)==' ') c = c.substring(1);
if (c.indexOf(name) != -1) return c.substring(name.length, c.length);
}
return "";
}
//清除cookie
function clearCookie(name) {
setCookie(name, "", -1);
}
function checkCookie() {
var user = getCookie("username");
if (user != "") {
alert("Welcome again " + user);
} else {
user = prompt("Please enter your name:", "");
if (user != "" && user != null) {
setCookie("username", user, 365);
}
}
}
checkCookie();

后端Python(flask):

1,设置cookie:
  from flask import make_response
  @app.route('/')
  def index():
  resp = make_response(render_template(...))
  resp.set_cookie('username', 'the username')
  return resp
2,读取cookie:
  request.cookies.get('username')
3,删除cookie:
  resp.set_cookie('username', '', expires=0)

另:

python—cookielib模块对cookies的操作

http://www.cnblogs.com/isuifeng/p/5903116.html 这个没看,不是很了解