139 lines
3.8 KiB
JavaScript
139 lines
3.8 KiB
JavaScript
import dotenv from 'dotenv'
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import express from 'express'
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import redis from 'redis'
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import pg from 'pg'
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import log from 'npmlog'
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dotenv.config()
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const pgConfigs = {
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development: {
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database: 'mastodon_development',
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host: '/var/run/postgresql',
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max: 10
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},
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production: {
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user: process.env.DB_USER || 'mastodon',
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password: process.env.DB_PASS || '',
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database: process.env.DB_NAME || 'mastodon_production',
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host: process.env.DB_HOST || 'localhost',
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port: process.env.DB_PORT || 5432,
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max: 10
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}
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}
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const app = express()
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const env = process.env.NODE_ENV || 'development'
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const pgPool = new pg.Pool(pgConfigs[env])
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const authenticationMiddleware = (req, res, next) => {
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const authorization = req.get('Authorization')
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if (!authorization) {
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err = new Error('Missing access token')
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err.statusCode = 401
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return next(err)
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}
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const token = authorization.replace(/^Bearer /, '')
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pgPool.connect((err, client, done) => {
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if (err) {
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log.error(err)
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return next(err)
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}
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client.query('SELECT oauth_access_tokens.resource_owner_id, users.account_id FROM oauth_access_tokens INNER JOIN users ON oauth_access_tokens.resource_owner_id = users.id WHERE oauth_access_tokens.token = $1 LIMIT 1', [token], (err, result) => {
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done()
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if (err) {
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log.error(err)
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return next(err)
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}
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if (result.rows.length === 0) {
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err = new Error('Invalid access token')
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err.statusCode = 401
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return next(err)
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}
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req.accountId = result.rows[0].account_id
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next()
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})
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})
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}
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const errorMiddleware = (err, req, res, next) => {
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res.writeHead(err.statusCode || 500, { 'Content-Type': 'application/json' })
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res.end(JSON.stringify({ error: err.statusCode ? `${err}` : 'An unexpected error occured' }))
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}
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const streamFrom = (id, req, res, needsFiltering = false) => {
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log.verbose(`Starting stream from ${id} for ${req.accountId}`)
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res.setHeader('Content-Type', 'text/event-stream')
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res.setHeader('Transfer-Encoding', 'chunked')
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const redisClient = redis.createClient()
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redisClient.on('message', (channel, message) => {
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const { event, payload } = JSON.parse(message)
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if (needsFiltering) {
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pgPool.connect((err, client, done) => {
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if (err) {
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log.error(err)
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return
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}
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const unpackedPayload = JSON.parse(payload)
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const targetAccountIds = [unpackedPayload.account.id] + unpackedPayload.mentions.map(item => item.id) + (unpackedPayload.reblog ? unpackedPayload.reblog.account.id : [])
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client.query('SELECT target_account_id FROM blocks WHERE account_id = $1 AND target_account_id IN ($2)', [req.accountId, targetAccountIds], (err, result) => {
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done()
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if (err) {
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log.error(err)
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return
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}
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if (result.rows.length > 0) {
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return
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}
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res.write(`event: ${event}\n`)
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res.write(`data: ${payload}\n\n`)
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})
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})
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} else {
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res.write(`event: ${event}\n`)
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res.write(`data: ${payload}\n\n`)
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}
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})
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const heartbeat = setInterval(() => res.write(':thump\n'), 15000)
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req.on('close', () => {
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log.verbose(`Ending stream from ${id} for ${req.accountId}`)
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clearInterval(heartbeat)
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redisClient.quit()
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})
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redisClient.subscribe(id)
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}
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app.use(authenticationMiddleware)
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app.use(errorMiddleware)
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app.get('/api/v1/streaming/user', (req, res) => streamFrom(`timeline:${req.accountId}`, req, res))
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app.get('/api/v1/streaming/public', (req, res) => streamFrom('timeline:public', req, res, true))
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app.get('/api/v1/streaming/hashtag', (req, res) => streamFrom(`timeline:hashtag:${req.params.tag}`, req, res, true))
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log.level = 'verbose'
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log.info(`Starting HTTP server on port ${process.env.PORT || 4000}`)
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app.listen(process.env.PORT || 4000)
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