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Merge pull request #4170 from overleaf/bg-add-serviceworker-metrics-for-fallback-requests

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add metrics for fallback requests in service worker

GitOrigin-RevId: 092e0dd31e45e522c31508334f53bd6642054371
This commit is contained in:
Jakob Ackermann 2021-06-10 12:02:24 +02:00 committed by Copybot
parent c774ddd111
commit fb249cb24f
1 changed files with 5 additions and 1 deletions
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6
services/web/frontend/js/serviceWorker.js
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@ -236,10 +236,12 @@ function processPdfRequest(
const chunks = getMatchingChunks(file.ranges, start, end)
const dynamicChunks = getInterleavingDynamicChunks(chunks, start, end)
const chunksSize = countBytes(chunks)
const size = end - start
if (chunks.length + dynamicChunks.length > MAX_SUBREQUEST_COUNT) {
// fall back to the original range request when splitting the range creates
// too many subrequests.
trackDownloadStats(metrics, { size, cachedBytes: 0, fetchedBytes: size })
return
}
if (
@ -249,6 +251,7 @@ function processPdfRequest(
// fall back to the original range request when a very large amount of
// object data would be requested, unless it is the only object in the
// request.
trackDownloadStats(metrics, { size, cachedBytes: 0, fetchedBytes: size })
return
}
@ -277,7 +280,6 @@ function processPdfRequest(
}
})
)
const size = end - start
let cachedBytes = 0
let fetchedBytes = 0
const reAssembledBlob = new Uint8Array(size)
@ -378,6 +380,8 @@ function processPdfRequest(
})
})
.catch(error => {
fetchedBytes += size
trackDownloadStats(metrics, { size, cachedBytes: 0, fetchedBytes })
reportError(event, OError.tag(error, 'failed to compose pdf response'))
return fetch(event.request)
})