change cache control header (stale-while-revalidate)

config/api.config.js

@@ -28,4 +28,8 @@ module.exports = {
   // The directLinkRegex is used to match the direct link of the file from the response of the API. We originally use this to prevent
   // unauthorised use of the proxied download feature - but that is disabled for now. So you can safely ignore this settings.
   directLinkRegex: 'public[.].*[.]files[.]1drv[.]com',
+
+  // Cache-Control header, check Vercel documentation for more details.
+  // https://vercel.com/docs/concepts/edge-network/caching
+  cacheControlHeader: 'max-age=0, s-maxage=1, stale-while-revalidate=59'
 }

pages/api/index.ts

@@ -133,7 +133,7 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
 
   // Set edge function caching for faster load times, check docs:
   // https://vercel.com/docs/concepts/functions/edge-caching
-  res.setHeader('Cache-Control', 'max-age=0, s-maxage=600, stale-while-revalidate')
+  res.setHeader('Cache-Control', apiConfig.cacheControlHeader)
 
   // Sometimes the path parameter is defaulted to '[...path]' which we need to handle
   if (path === '[...path]') {

pages/api/item.ts

@@ -13,7 +13,7 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
 
   // Set edge function caching for faster load times, check docs:
   // https://vercel.com/docs/concepts/functions/edge-caching
-  res.setHeader('Cache-Control', 'max-age=0, s-maxage=600, stale-while-revalidate')
+  res.setHeader('Cache-Control', apiConfig.cacheControlHeader)
 
   if (typeof id === 'string') {
     const itemApi = `${apiConfig.driveApi}/items/${id}`

pages/api/search.ts

@@ -34,7 +34,7 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
 
   // Set edge function caching for faster load times, check docs:
   // https://vercel.com/docs/concepts/functions/edge-caching
-  res.setHeader('Cache-Control', 'max-age=0, s-maxage=600, stale-while-revalidate')
+  res.setHeader('Cache-Control', apiConfig.cacheControlHeader)
 
   if (typeof searchQuery === 'string') {
     // Construct Microsoft Graph Search API URL, and perform search only under the base directory

pages/api/thumbnail.ts

@@ -17,7 +17,7 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
 
   // Set edge function caching for faster load times, check docs:
   // https://vercel.com/docs/concepts/functions/edge-caching
-  res.setHeader('Cache-Control', 'max-age=0, s-maxage=600, stale-while-revalidate')
+  res.setHeader('Cache-Control', apiConfig.cacheControlHeader)
 
   // Check whether the size is valid - must be one of 'large', 'medium', or 'small'
   if (size !== 'large' && size !== 'medium' && size !== 'small') {