Python 设置和调用 Cookie

Question

Is there any way that I could set a cookie and later recall a variable from that cookie using python? Like:

    > setcookie("prefence","data")
    ...
    > recallcookie("preference")
    data

I would prefer not to use libraries that aren't built in, but if necessary, I am fine with using an external library.

Answer 1

I found out myself, using SimpleCookies and the HTTP_COOKIE environmental variable. In the content header, define cookies as normal (SimpleCookies makes this simple). For example:

from http import cookies
cookie = cookies.SimpleCookie()
cookie["varname"] = 'value'
print(cookie.output())

Then normal cookie variables can be assigned like so:

cookie["varname"] = 'value'
cookie["varname"]["expires"] = "formatted date"
cookie["varname"]["othercookieproperty"] =  "othercookieproperty"

To recall them, one can make a Simple Cookie out of the HTTP_COOKIE environmental variable, like so:

readcookie = cookies.SimpleCookie(os.environ["HTTP_COOKIE"])
print(readcookie["varname"].value)

This would print 'value', the value assigned earlier. These can also be called between sessions, until the cookie expires.