python的web框架webpy【session & cookie】五
webpty中使用session非常简单import web
web.config.debug = False
urls = (
"/count", "count",
"/reset", "reset"
)
app = web.application(urls, locals())
session = web.session.Session(app, web.session.DiskStore('sessions'), initializer={'count': 0})
class count:
def GET(self):
session.count += 1
return str(session.count)
class reset:
def GET(self):
session.kill()
return ""
if __name__ == "__main__":
app.run()
initializer 指定session的初始化值
web.session.DiskStore('sessions') #设置session的存储方式为磁盘
我们也可以指定session存储在数据库中
db = web.database(dbn='postgres', db='mydatabase', user='myname', pw='')
store = web.session.DBStore(db, 'sessions')
session = web.session.Session(app, store, initializer={'count': 0})
表结构
create table sessions (
session_id char(128) UNIQUE NOT NULL,
atime timestamp NOT NULL default current_timestamp,
data text
);
我们可以通过web.config对session进行一些可选设置
web.config.session_parameters['cookie_name'] = 'webpy_session_id'
web.config.session_parameters['cookie_domain'] = None
web.config.session_parameters['timeout'] = 86400, #24 * 60 * 60, # 24 hours in seconds
web.config.session_parameters['ignore_expiry'] = True
web.config.session_parameters['ignore_change_ip'] = True
web.config.session_parameters['secret_key'] = 'fLjUfxqXtfNoIldA0A0J'
web.config.session_parameters['expired_message'] = 'Session expired'
webpy中使用cookie
setcookie(name, value, expires="", domain=None, secure=False):
cookie_name - session id 存储在cookie中的名称
cookie_domain - cookie的domain
timeout - session 过期时间，单位为秒
ignore_expiry -如果设置为True则忽略过期时间
ignore_change_ip - 如果为False则来自同一ip则session才有效
secret_key - session id的hash值
expired_message - session 失效后显示的信息
设置cookie
web.setcookie('age', i.age, 3600)
读取cookie
web.cookies().get(cookieName)
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