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Restore --unsafely-treat-insecure-origin-as-secure flag for Blazor WASM Lighthouse scenario #2157

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Merged
sebastienros merged 2 commits into from
Mar 4, 2026
Merged

Restore --unsafely-treat-insecure-origin-as-secure flag for Blazor WASM Lighthouse scenario #2157

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576b51c
Restore --unsafely-treat-insecure-origin-as-secure flag for Blazor WA…
ilonatommy Mar 3, 2026
aae2433
Also accept cached (fromCache) responses in WASM caching check
ilonatommy Mar 3, 2026
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11 changes: 9 additions & 2 deletions src/BenchmarksApps/Lighthouse/src/blazor-scenario.js
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Original file line number Diff line number Diff line change
Expand Up @@ -24,7 +24,13 @@ logReadyStateText(); // Required by the Crank job

const browser = await puppeteer.launch({
headless: headless === 'true',
args: ['--no-sandbox']
args: [
'--no-sandbox',
// Treat the target URL as a secure origin so that crypto.subtle is available.
// This is needed because Blazor WASM requires crypto.subtle, which is only
// available in secure contexts (HTTPS or localhost).
`--unsafely-treat-insecure-origin-as-secure=${targetBaseUrl}`,
],
});

const pageUrl = `${targetBaseUrl}/counter`;
Expand Down Expand Up @@ -126,7 +132,8 @@ function throwOnFutureUncachedWasmDownloads(page) {

page.on('requestfinished', request => {
const url = request.url();
if (url.endsWith('.wasm') && request.response().status() !== 304) {
const response = request.response();
if (url.endsWith('.wasm') && response.status() !== 304 && !response.fromCache()) {
throw new Error(`Unexpected uncached wasm resource '${url}'`);
}
});
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