Generic session middleware for koa, easy use with custom stores such as redis or mongo, supports defer session getter. different from koa-session(it is cookie session).
This middleware will only set a cookie when a session is manually set. Each time the session is modified (and only when the is session modified), it will reset the cookie and session.
You can use the rolling sessions that will reset the cookie and session for every request which touch the session.
var session = require('koa-generic-session');
var redisStore = require('koa-redis');
var koa = require('koa');
var app = koa();
app.keys = ['keys', 'keykeys'];
app.use(session({
store: redisStore()
}));
app.use(function *() {
switch (this.path) {
case '/get':
get.call(this);
break;
case '/remove':
remove.call(this);
break;
}
});
function get() {
var session = this.session;
session.count = session.count || 0;
session.count++;
this.body = session.count;
}
function remove() {
this.session = null;
this.body = 0;
}
app.listen(8080);
- After adding session middleware, you can use
this.session
to set or get the sessions. - Setting
this.session = null;
will destroy this session. - Altering
this.session.cookie
changes the cookie options of this user. Also you can use the cookie options in session the store. Use for examplecookie.maxage
as the session store's ttl.
-
key
: cookie name defaulting tokoa.sid
-
prefix
: session prefix for store, defaulting tokoa:sess:
-
store
: session store instance -
cookie
: session cookie settings -
ttl
: ttl is for sessionStore's expiration time. it is different withcookie.maxage
, default to null(means get ttl fromcookie.maxage
). -
rolling
: rolling session, always reset the cookie and sessions, defaults tofalse
-
genSid
: default sid was generated by uid2, you can pass a function to replace it -
defer
: defers get session, only generate a session when you use it throughvar session = yield this.session;
, defaults tofalse
-
allowEmpty
: allow generation of empty sessions -
errorHandler(err, type, ctx)
:Store.get
andStore.set
will throw in some situation, useerrorHandle
to handle these errors by yourself. Default will throw. -
Store can be any Object that has the methods
set
,get
,destroy
like MemoryStore. -
cookie defaulting to
{
path: '/',
httpOnly: true,
maxage: null,
rewrite: true,
signed: true
}
For a full list of cookie options see expressjs/cookies.
if you setcookie.maxage
to null
, meaning no "expires" parameter is set so the cookie becomes a browser-session cookie. When the user closes the browser the cookie (and session) will be removed.
Notice that ttl
is different from cookie.maxage
, ttl
set the expire time of sessionStore. So if you set cookie.maxage = null
, and ttl=ms('1d')
, the session will expired after one day, but the cookie will destory when the user cloese the browser.
And mostly you can just ignore options.ttl
, koa-generic-session
will parse cookie.maxage
as the tll.
You can use any other store to replace the default MemoryStore, it just needs to follow this api:
get(sid)
: get session object by sidset(sid, sess, ttl)
: set session object for sid, with a ttl (in ms)destroy(sid)
: destory session for sid
the api needs to return a Promise, Thunk or generator.
And use these events to report the store's status.
connect
disconnect
- koa-redis to store your session data with redis.
- koa-mysql-session to store your session data with MySQL.
- koa-generic-session-mongo to store your session data with MongoDB.
(The MIT License)
Copyright (c) 2013 - 2014 dead-horse and other contributors
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