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| | import express from 'express' |
| | import crypto from 'crypto' |
| |
|
| | const router = express.Router() |
| |
|
| | router.get('/*path', function (req, res) { |
| | |
| | if (req.get('X-CacheTest-Error')) { |
| | res.status(parseInt(req.get('X-CacheTest-Error') as string)).end() |
| | return |
| | } |
| |
|
| | const cacheControlModeParam = req.get('X-CacheTest-CCMode') ?? 'none' |
| | const staleIfErrorParam = req.get('X-CacheTest-StaleIfError') ?? '300' |
| | const staleWhileRevalidateParam = req.get('X-CacheTest-StaleWhileRevalidate') ?? '60' |
| | const maxAgeParam = req.get('X-CacheTest-MaxAge') ?? '300' |
| |
|
| | const path = req.path.slice(1) |
| |
|
| | const content = `<html> |
| | <body> |
| | <p>Timestamp: ${new Date()}</p> |
| | </body> |
| | </html>` |
| |
|
| | let status = 200 |
| | const surrogateControlValues = [] |
| |
|
| | if (path.includes('max-age')) surrogateControlValues.push(`max-age=${maxAgeParam}`) |
| |
|
| | if (path.includes('must-revalidate')) surrogateControlValues.push('must-revalidate') |
| | if (path.includes('no-cache')) surrogateControlValues.push('no-cache') |
| | if (path.includes('no-store')) surrogateControlValues.push('no-store') |
| | if (path.includes('private')) surrogateControlValues.push('private') |
| | if (path.includes('proxy-revalidate')) surrogateControlValues.push('proxy-revalidate') |
| | if (path.includes('public')) surrogateControlValues.push('public') |
| |
|
| | if (path.includes('stale-if-error')) |
| | surrogateControlValues.push(`stale-if-error=${staleIfErrorParam}`) |
| | if (path.includes('stale-while-revalidate')) |
| | surrogateControlValues.push(`stale-while-revalidate=${staleWhileRevalidateParam}`) |
| |
|
| | if (path.includes('no-cookies')) { |
| | res.removeHeader('Set-Cookie') |
| | } |
| |
|
| | if (path.includes('etag')) { |
| | res.set({ |
| | ETag: `"${crypto.createHash('md5').update(content).digest('hex')}"`, |
| | }) |
| | } |
| |
|
| | if (path.includes('error500')) { |
| | status = 500 |
| | } else if (path.includes('error502')) { |
| | status = 502 |
| | } else if (path.includes('error503')) { |
| | status = 503 |
| | } else if (path.includes('error504')) { |
| | status = 504 |
| | } |
| |
|
| | if (surrogateControlValues.length > 0) { |
| | switch (cacheControlModeParam) { |
| | case 'none': |
| | res.set({ |
| | 'surrogate-control': surrogateControlValues.join(', '), |
| | }) |
| | break |
| |
|
| | case 'both': |
| | res.set({ |
| | 'surrogate-control': surrogateControlValues.join(', '), |
| | 'cache-control': surrogateControlValues.join(', ').replace('max-age', 's-maxage'), |
| | }) |
| | break |
| |
|
| | case 'only': |
| | res.set({ |
| | 'cache-control': surrogateControlValues.join(', ').replace('max-age', 's-maxage'), |
| | }) |
| | break |
| | } |
| | } |
| |
|
| | res.status(status) |
| | res.send(content) |
| | res.end() |
| | }) |
| |
|
| | export default router |
| |
|
