how to use custom storesr.

[hezhongfeng]

Store.js

import Redis from "ioredis";
import {Store} from "koa-session2";

export default class RedisStore extends Store {
  constructor() {
    super();
    this.redis = new Redis();
  }

  async get(sid) {
    return await this.redis.get(`SESSION:${sid}`);
  }

  async set(session, opts) {
    if (!opts.sid) {
      opts.sid = this.getID(24);
    }
    await this.redis.set(`SESSION:${opts.sid}`, session);
    return opts.sid;
  }

  async destroy(sid) {
    return await this.redis.del(`SESSION:${sid}`);
  }
}

when I use sessoin to store others,it doesn't work. For example: when I login succeed,I want to store the user's information. but when I want get it from session,it is "undefined". But when I didn't use redis,it work well.

  //update session
  ctx.session.user = userInfo;

get user information at other get request,it is "undefined"

console.log(ctx.session.user);

[Secbone]

Any case could you show me? You can check if any cookie is set in browser and you got the correct cookie in server side. Maybe you can check my test case here

[hezhongfeng]

@Secbone I could check the cookie id in browaer and redis.It's same. But the user's information isn't storied in redis. I don't know why.

import session from "koa-session2";
import Store from "./models/store";
...
app.use(session({
  store: new Store(),
  maxAge: 1000 * 60 * 60 * 24,
}));

[Secbone]

what is the value of the "SESSION:${id}" in your redis? "", {} or something else?

[hezhongfeng]

@Secbone I use keys *to show the ID It'sSESSION:n5hbppq7BI1cZBEi-xgO-zvQvixGWr8g just this.

[Secbone]

get SESSION:n5hbppq7BI1cZBEi-xgO-zvQvixGWr8g ?

[hezhongfeng]

YES @Secbone

[Secbone]

Can you share me the code on Github or anywhere else?

[hezhongfeng]

@Secbone It's store.js.

import Redis from "ioredis";
import {Store} from "koa-session2";

export default class RedisStore extends Store {
  constructor() {
    super();
    this.redis = new Redis();
  }

  async get(sid) {
    return await this.redis.get(`SESSION:${sid}`);
  }

  async set(session, opts) {
    if (!opts.sid) {
      opts.sid = this.getID(24);
    }
    await this.redis.set(`SESSION:${opts.sid}`, session);
    return opts.sid;
  }

  async destroy(sid) {
    return await this.redis.del(`SESSION:${sid}`);
  }
}

app.js

import session from "koa-session2";
import Store from "./models/store";
...
app.use(session({
  store: new Store(),
  maxAge: 1000 * 60 * 60 * 24,
}));

login.js

  const userInfo = await User.getUserByEmail(data.email);
  //update session
  ctx.session.user = userInfo;
  message.result = true;
  ctx.body = message;

home.js

  await ctx.render('home', {
    session: ctx.session,
  });

The only difference is that

app.use(session({
  store: new Store(),
  maxAge: 1000 * 60 * 60 * 24,
}));

or

app.use(session({
  //store: new Store(),
  maxAge: 1000 * 60 * 60 * 24,
}));

[Secbone]

Your session is an object, and redis can only accept a value of String, so that you should change your session to JSON type, like this:

redis.set(`SESSION:${opts.sid}`, JSON.stringify(session));

...

let data = await redis.get(`SESSION:${sid}`);
session = JSON.parse(data);

[hezhongfeng]

@Secbone Thank you. It work well.