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Merge pull request #11770 from overleaf/jpa-flag-403

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[web] catch unexpected response status codes from user content domain

GitOrigin-RevId: 654141e1be8721f92be271733aca70a7bc672973
This commit is contained in:
Jakob Ackermann 2023-02-13 10:19:18 +00:00 committed by Copybot
parent 577a8a3ee2
commit ed2b96276d
1 changed files with 29 additions and 2 deletions
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31
services/web/frontend/js/features/pdf-preview/util/fetchFromCompileDomain.ts
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@ -6,6 +6,24 @@ import { postJSON } from '../../../infrastructure/fetch-json'
let useFallbackDomainUntil = performance.now()
const ONE_HOUR_IN_MS = 1000 * 60 * 60
class MaybeBlockedByProxyError extends OError {}
function checkForBlockingByProxy(res: Response) {
const statusCode = res.status
switch (statusCode) {
case 200: // full response
case 206: // range response
case 404: // file not found
case 416: // range not found
return
default:
throw new MaybeBlockedByProxyError('request might be blocked by proxy', {
res,
statusCode,
})
}
}
export async function fetchFromCompileDomain(url: string, init: RequestInit) {
const userContentDomain = getMeta('ol-compilesUserContentDomain')
let isUserContentDomain =
@ -17,9 +35,18 @@ export async function fetchFromCompileDomain(url: string, init: RequestInit) {
url = withFallbackCompileDomain(url)
}
try {
return await fetch(url, init)
const res = await fetch(url, init)
if (isUserContentDomain) {
// Only throw a MaybeBlockedByProxyError when the request will be retried
// on the fallback domain below.
checkForBlockingByProxy(res)
}
return res
} catch (err) {
if (isNetworkError(err) && isUserContentDomain) {
if (
(isNetworkError(err) || err instanceof MaybeBlockedByProxyError) &&
isUserContentDomain
) {
try {
const res = await fetch(withFallbackCompileDomain(url), init)
// Only switch to the fallback when fetch does not throw there as well.