svelte-kit-connect-upstash-redis

svelte-kit-connect-upstash-redis

svelte-kit-connect-upstash-redis provides Upstash Redis session storage for svelte-kit-sessions.

Installation

svelte-kit-connect-upstash-redis requires svelte-kit-sessions to installed.

$ npm install @upstash/redis svelte-kit-connect-upstash-redis svelte-kit-sessions

$ yarn add @upstash/redis svelte-kit-connect-upstash-redis svelte-kit-sessions

$ pnpm add @upstash/redis svelte-kit-connect-upstash-redis svelte-kit-sessions

Usage

svelte-kit-connect-upstash-redis can be used as a custom store for svelte-kit-sessions as follows.

Note For more information about svelte-kit-sessions, see https://www.npmjs.com/package/svelte-kit-sessions.

// src/hooks.server.ts
import type { Handle } from '@sveltejs/kit';
import { sveltekitSessionHandle } from 'svelte-kit-sessions';
import RedisStore from 'svelte-kit-connect-upstash-redis';
import { Redis } from '@upstash/redis';

const client = new Redis({
	url: '{your upstash redis rest url}',
	token: '{your upstash redis rest token}'
});

export const handle: Handle = sveltekitSessionHandle({
	secret: 'secret',
	store: new RedisStore({ client })
});

API

import RedisStore from 'svelte-kit-connect-upstash-redis';

new RedisStore(options);

new RedisStore(options)

Create a Redis store for svelte-kit-sessions.

Options

A summary of the options is as follows.

Name	Type	required/optional	Description
client	upstashRedis.Redis | upstashRedisCloudflare.Redis | upstashRedisFastly.Redis	required	An instance of @upstash/redis
prefix	string	optional	Key prefix in Redis (default: sess:).
serializer	Serializer	optional	Provide a custom encoder/decoder to use when storing and retrieving session data from Redis (default: JSON.parse and JSON.stringify).
ttl	number	optional	ttl to be used if ttl is Infinity when used from svelte-kit-sessions

client

An instance of @upstash/redis. You can use to all of @upstash/redis (node, cloudflare, fastly).

prefix

Key prefix in Redis (default: sess:).

serializer

Provide a custom encoder/decoder to use when storing and retrieving session data from Redis (default: JSON.parse and JSON.stringify).

Note When setting up a custom serializer, the following interface must be satisfied.

interface Serializer {
	parse(s: string): SessionStoreData | Promise<SessionStoreData>;
	stringify(data: SessionStoreData): string;
}

ttl

When svelte-kit-sessions calls a method of the store (the set function), ttl(milliseconds) is passed to it. However, if the cookie options expires and maxAge are not set, the ttl passed will be Infinity.

If the ttl passed is Infinity, the ttl to be set can be set with this option. The unit is milliseconds.

// `svelte-kit-connect-upstash-redis` implementation excerpts
const ONE_DAY_IN_SECONDS = 86400;
export default class RedisStore implements Store {
	constructor(options: RedisStoreOptions) {
		this.ttl = options.ttl || ONE_DAY_IN_SECONDS * 1000;
	}

	ttl: number;

	async set(id: string, storeData: SessionStoreData, ttl: number): Promise<void> {
		// omission ...
		if (ttl !== Infinity) {
			// if `ttl` passed as argument is *not* Infinity, use the argument `ttl` as it is.
			await this.client.set(key, serialized, { PX: ttl });
			return;
		}
		// if `ttl` passed as argument is Infinity, use `options.ttl` or default.
		await this.client.set(key, serialized, { PX: this.ttl });
	}
}

License

MIT licensed