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fix(ui): detect gzip by magic numbers instead of Content-Type header in html reporter #9278

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Merged
sheremet-va merged 4 commits into from
Dec 17, 2025
+8 −8
Merged

fix(ui): detect gzip by magic numbers instead of Content-Type header in html reporter #9278

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d9fe149
Initial plan
Copilot Dec 17, 2025
f652177
fix(ui): handle gzip content-encoding in HTML reporter metadata
Copilot Dec 17, 2025
c87d8ec
fix(ui): clarify comment about incorrect server behavior
Copilot Dec 17, 2025
8b10b7a
Update packages/ui/client/composables/client/static.ts
hi-ogawa Dec 17, 2025
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16 changes: 8 additions & 8 deletions packages/ui/client/composables/client/static.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -98,17 +98,17 @@ export function createStaticClient(): VitestClient {

async function registerMetadata() {
const res = await fetch(window.METADATA_PATH!)
const contentType = res.headers.get('content-type')?.toLowerCase() || ''
if (
contentType.includes('application/gzip')
|| contentType.includes('application/x-gzip')
) {
const compressed = new Uint8Array(await res.arrayBuffer())
const decompressed = strFromU8(decompressSync(compressed))
const content = new Uint8Array(await res.arrayBuffer())

// Check for gzip magic numbers (0x1f 0x8b) to determine if content is compressed.
// This handles cases where a static server incorrectly sets Content-Encoding: gzip
// for .gz files, causing the browser to auto-decompress before we process the raw gzip data.
if (content.length >= 2 && content[0] === 0x1F && content[1] === 0x8B) {
const decompressed = strFromU8(decompressSync(content))
metadata = parse(decompressed) as HTMLReportMetadata
}
else {
metadata = parse(await res.text()) as HTMLReportMetadata
metadata = parse(strFromU8(content)) as HTMLReportMetadata
}
const event = new Event('open')
ctx.ws.dispatchEvent(event)
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