kopia lustrzana https://github.com/Tldraw/Tldraw
70 wiersze
2.0 KiB
TypeScript
70 wiersze
2.0 KiB
TypeScript
import { DiscordPayload, updownToDiscord } from './discord'
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import { Event as UpdownEvent } from './updown_types'
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interface Env {
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DISCORD_HEALTH_WEBHOOK_URL: string | undefined
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// it needs to be passed in because it's effectively a secret, unless we want everyone to be able
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// to stress us out with spurious discord alerts
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HEALTH_WORKER_UPDOWN_WEBHOOK_PATH: string | undefined
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}
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async function sendDiscordWebhook(url: string, discord: DiscordPayload): Promise<Response> {
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return fetch(url, {
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method: 'POST',
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headers: {
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'Content-Type': 'application/json',
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},
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body: JSON.stringify(discord),
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})
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}
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async function handleUpdown(request: Request, discordUrl: string): Promise<Response> {
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const updownEvents = (await request.json()) as Array<UpdownEvent>
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let status = 200
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for (const e of updownEvents) {
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const discordPayload = updownToDiscord(e)
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if (!discordPayload) {
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continue
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}
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const discordResult = await sendDiscordWebhook(discordUrl, discordPayload)
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if (!discordResult.ok) {
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console.error(`Discord error ${discordResult.status}: ${discordResult.statusText}`)
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status = discordResult.status
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break
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}
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}
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return new Response(null, { status })
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}
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const handler: ExportedHandler<Env> = {
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async fetch(request: Request, env: Env): Promise<Response> {
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const discordUrl = env.DISCORD_HEALTH_WEBHOOK_URL
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if (!discordUrl) {
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console.error('missing DISCORD_HEALTH_WEBHOOK_URL')
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return new Response('Internal error', { status: 500 })
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}
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const updownWebhookPath = env.HEALTH_WORKER_UPDOWN_WEBHOOK_PATH
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if (!updownWebhookPath) {
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console.error('missing HEALTH_WORKER_UPDOWN_WEBHOOK_PATH')
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return new Response('Internal error', { status: 500 })
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}
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const url = new URL(request.url)
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// timing safety COULD be an issue, but it seems that in practice it isn't:
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// https://github.com/scriptin/node-timing-attack
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// my own testing confirms those observations
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if (url.pathname === updownWebhookPath) {
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return handleUpdown(request, discordUrl)
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}
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return new Response('Not Found', { status: 404 })
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},
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}
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export default handler
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