fib-session

Session middleware for fibjs

Install

npm install fib-session [--save]

Test

npm run ci

Creating a cookie-based session middleware

var Session = require('fib-session')
var session = new Session(conn, opts);

var srv = new http.Server(8000, [
    session.cookie_filter, // use session ID via cookie
    {
        // routers
        '^/foo$': (r) => {
            var v = r.session.v;
        },
        ...
    }
]);

Creating a api session middleware

var Session = require('fib-session')
var session = new Session(conn, opts);

var srv = new http.Server(8000, [
    session.api_filter, // use api session filter
    {
        // routers
        '^/foo$': (r) => {
            var v = r.session.v;
        },
        '^/get-token$': session.api_token
    }
]);

Both kv options and sesion options are in the same object.

kv-store options

options	default	object/Map	LruCache	LevelDB	Redis	MongoDB	SQLite/MySQL
table_name	"kvs"	x	x	x	√	√	√
key_name	"k"	x	x	x	x	√	√
value_name	"v"	x	x	x	x	√	√
key_size	32	x	x	x	x	x	√
value_size	256	x	x	x	x	x	√
cleanup_interval(ms)	60000	x	x	x	x	x	√
timeout(ms)	0	x	√	x	√	√	√
prefix	""	√	√	√	√	√	√
cache	false	√	√	√	√	√	√
cache_size	65536	√	√	√	√	√	√
cache_timeout(ms)	60000	√	√	√	√	√	√

session options

options	default
session_cache_size	65536	max number of session in cache
session_cache_timeout(ms)	900000	clear session objects which is not operated for a period of time from buffer, default 15 minutes
session_cache_delay	100	time delay for write session to persistent storage
session_id_name	"sessionID"

• session cache is used to keep session consistency among http requires.

• the timeout of session cache must be larger than its delay

• The client-side has only the session ID. The session is operated on the server-side.

Methods

session.setup()

setup the backend database.

v = session.cookie_filter

returns a cookie-based session filter.

session.api_filter

returns a header-based session filter.

session.api_token

returns an api handler that gets a new session ID.

JSON Web Token(JWT)

options

options	default
session_jwt_algo	null	see jws.ALGORITHMS in fib-jws
session_jwt_key	null	sign key. see in fib-jws

• see fib-jws https://github.com/fibjs/fib-jws
• set session_jwt_algo and session_jwt_key to enable JWT

// session_jwt_algo is encryption algorithms in fib-jws
// session_jwt_key is to verify the signature. 
var session = new Session(conn, { session_jwt_algo: 'HS256',  session_jwt_key: verify_key })

Methods

session.setTokenCookie

• set the JSON Web Token in cookie
• sign_key for signature, may be different from session_jwt_key, depending on the algorithm.
• according to JSON Web Token specification, one user session can only be called setTokenCookie once for set user session info. The second will throw an exception: new Error('Can't modify the JSON Web Token')
• default value r.session={}

// sign user info: { id: 12345, name: "Frank" }, and set the cookie
// r is request
session.setTokenCookie(r, { id: 12345, name: "Frank" }, sign_key)

session.getToken

• get token for api filter mode, see session.api_filter

session.getToken ({ id: 12345, name: "Frank" }, sign_key)