Created
December 31, 2022 15:05
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Using DynamoDB for sessions in remix (File sessions in local dev)
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import { DynamoDBClient } from '@aws-sdk/client-dynamodb' | |
import { DeleteCommand, DynamoDBDocumentClient, GetCommand, PutCommand, UpdateCommand } from '@aws-sdk/lib-dynamodb' | |
import { Cookie, createCookie, createFileSessionStorage, createSessionStorage, SessionStorage } from '@remix-run/node' | |
import { v4 as uuidv4 } from 'uuid' | |
import { getEnv } from '~/utils/get-env' | |
const LOCAL_DEV = process.env.LOCAL_DEV === 'true' | |
if (LOCAL_DEV) { | |
// eslint-disable-next-line @typescript-eslint/no-require-imports, import/no-extraneous-dependencies, @typescript-eslint/no-var-requires | |
const dotenv = require('dotenv') | |
dotenv.config() | |
} | |
const client = new DynamoDBClient({}) | |
const ddbDocClient = DynamoDBDocumentClient.from(client, { | |
marshallOptions: { | |
removeUndefinedValues: true, | |
}, | |
}) | |
function getTtl(now: Date) { | |
const utcMilllisecondsSinceEpoch = now.getTime() + now.getTimezoneOffset() * 60 * 1000 | |
return Math.round(utcMilllisecondsSinceEpoch / 1000) | |
} | |
function createDynamoDbSessionStorage(sessionCookie: Cookie) { | |
return createSessionStorage({ | |
cookie: sessionCookie, | |
async createData(data, expires) { | |
const id = uuidv4() | |
try { | |
await ddbDocClient.send( | |
new PutCommand({ | |
TableName: getEnv('SESSIONS_TABLE'), | |
Item: { | |
pk: id, | |
session: data, | |
ttl: expires ? getTtl(expires) : undefined, | |
}, | |
}) | |
) | |
} catch (err) { | |
console.error(`PutCommand Error: ${err}`) | |
} | |
console.info(`Session created ID: ${id}`) | |
return id | |
}, | |
async readData(id) { | |
console.info(`Session read ID: ${id}`) | |
let res | |
try { | |
res = await ddbDocClient.send( | |
new GetCommand({ | |
TableName: getEnv('SESSIONS_TABLE'), | |
Key: { | |
pk: id, | |
}, | |
}) | |
) | |
} catch (err) { | |
console.error(`GetCommand Error: ${err}`) | |
} | |
return res?.Item?.session ?? null | |
}, | |
async updateData(id, data, expires) { | |
try { | |
if (expires) { | |
await ddbDocClient.send( | |
new UpdateCommand({ | |
TableName: getEnv('SESSIONS_TABLE'), | |
Key: { | |
pk: id, | |
}, | |
UpdateExpression: 'set #session = :data, #ttl = :ttl', | |
ExpressionAttributeNames: { | |
'#session': 'session', | |
'#ttl': 'ttl', | |
}, | |
ExpressionAttributeValues: { | |
':data': data, | |
':ttl': expires ? getTtl(expires) : undefined, | |
}, | |
}) | |
) | |
} else { | |
await ddbDocClient.send( | |
new UpdateCommand({ | |
TableName: getEnv('SESSIONS_TABLE'), | |
Key: { | |
pk: id, | |
}, | |
UpdateExpression: 'set #session = :data', | |
ExpressionAttributeNames: { | |
'#session': 'session', | |
}, | |
ExpressionAttributeValues: { | |
':data': data, | |
}, | |
}) | |
) | |
} | |
} catch (err) { | |
console.error(`UpdateCommand Error: ${err}`) | |
} | |
}, | |
async deleteData(id) { | |
try { | |
await ddbDocClient.send( | |
new DeleteCommand({ | |
TableName: getEnv('SESSIONS_TABLE'), | |
Key: { | |
pk: id, | |
}, | |
}) | |
) | |
} catch (err) { | |
console.error(`DeleteCommand Error: ${err}`) | |
} | |
}, | |
}) | |
} | |
const SESSION_TIMEOUT = process.env.SESSION_TIMEOUT ? parseInt(process.env.SESSION_TIMEOUT) : 3600 | |
const cookie = createCookie('__session', { | |
secrets: [getEnv('COOKIE_SECRET')], | |
maxAge: SESSION_TIMEOUT, | |
sameSite: 'strict', | |
httpOnly: true, | |
path: '/', | |
domain: getEnv('COOKIE_DOMAIN'), | |
secure: !LOCAL_DEV, | |
}) | |
let cookieSessionStorage: SessionStorage | |
if (LOCAL_DEV) { | |
cookieSessionStorage = createFileSessionStorage({ | |
cookie, | |
dir: '/tmp', | |
}) | |
} else { | |
cookieSessionStorage = createDynamoDbSessionStorage(cookie) | |
} | |
export const { commitSession, destroySession, getSession } = cookieSessionStorage |
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