testing/web-platform/tests/service-workers/service-worker/resources/test-request-headers-worker.js


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// Add a unique UUID per request to induce service worker script update.
// Time stamp: %UUID%

// The server injects the request headers here as a JSON string.
const headersAsJson = `%HEADERS%`;
const headers = JSON.parse(headersAsJson);

self.addEventListener('message', async (e) => {
  e.source.postMessage(headers);
});