54 lines
1.6 KiB
TypeScript
54 lines
1.6 KiB
TypeScript
import assert from 'node:assert'
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import {DAY, SECOND} from '@atproto/common'
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import {Express} from 'express'
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import {AppContext} from '../context.js'
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import {handler} from './util.js'
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export default function (ctx: AppContext, app: Express) {
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return app.get(
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'/:linkId',
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handler(async (req, res) => {
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const linkId = req.params.linkId
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const contentType = req.accepts(['html', 'json'])
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assert(
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typeof linkId === 'string',
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'express guarantees id parameter is a string',
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)
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const found = await ctx.db.db
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.selectFrom('link')
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.selectAll()
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.where('id', '=', linkId)
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.executeTakeFirst()
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if (!found) {
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// potentially broken or mistyped link
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res.setHeader('Cache-Control', 'no-store')
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if (contentType === 'json') {
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return res
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.status(404)
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.json({
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error: 'NotFound',
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message: 'Link not found',
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})
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.end()
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}
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// send the user to the app
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res.setHeader('Location', `https://${ctx.cfg.service.appHostname}`)
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return res.status(302).end()
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}
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// build url from original url in order to preserve query params
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const url = new URL(
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req.originalUrl,
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`https://${ctx.cfg.service.appHostname}`,
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)
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url.pathname = found.path
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res.setHeader('Cache-Control', `max-age=${(7 * DAY) / SECOND}`)
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if (contentType === 'json') {
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return res.json({url: url.href}).end()
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}
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res.setHeader('Location', url.href)
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return res.status(301).end()
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}),
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)
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}
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