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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,118 @@ | ||
| /*! coi-serviceworker v0.1.7 - Guido Zuidhof and contributors, licensed under MIT */ | ||
| let coepCredentialless = false; | ||
| if (typeof window === 'undefined') { | ||
| self.addEventListener("install", () => self.skipWaiting()); | ||
| self.addEventListener("activate", (event) => event.waitUntil(self.clients.claim())); | ||
|
|
||
| self.addEventListener("message", (ev) => { | ||
| if (!ev.data) { | ||
| return; | ||
| } else if (ev.data.type === "deregister") { | ||
| self.registration | ||
| .unregister() | ||
| .then(() => { | ||
| return self.clients.matchAll(); | ||
| }) | ||
| .then(clients => { | ||
| clients.forEach((client) => client.navigate(client.url)); | ||
| }); | ||
| } else if (ev.data.type === "coepCredentialless") { | ||
| coepCredentialless = ev.data.value; | ||
| } | ||
| }); | ||
|
|
||
| self.addEventListener("fetch", function (event) { | ||
| const r = event.request; | ||
| if (r.cache === "only-if-cached" && r.mode !== "same-origin") { | ||
| return; | ||
| } | ||
|
|
||
| const request = (coepCredentialless && r.mode === "no-cors") | ||
| ? new Request(r, { | ||
| credentials: "omit", | ||
| }) | ||
| : r; | ||
| event.respondWith( | ||
| fetch(request) | ||
| .then((response) => { | ||
| if (response.status === 0) { | ||
| return response; | ||
| } | ||
|
|
||
| const newHeaders = new Headers(response.headers); | ||
| newHeaders.set("Cross-Origin-Embedder-Policy", | ||
| coepCredentialless ? "credentialless" : "require-corp" | ||
| ); | ||
| if (!coepCredentialless) { | ||
| newHeaders.set("Cross-Origin-Resource-Policy", "cross-origin"); | ||
| } | ||
| newHeaders.set("Cross-Origin-Opener-Policy", "same-origin"); | ||
|
|
||
| return new Response(response.body, { | ||
| status: response.status, | ||
| statusText: response.statusText, | ||
| headers: newHeaders, | ||
| }); | ||
| }) | ||
| .catch((e) => console.error(e)) | ||
| ); | ||
| }); | ||
|
|
||
| } else { | ||
| (() => { | ||
| // You can customize the behavior of this script through a global `coi` variable. | ||
| const coi = { | ||
| shouldRegister: () => true, | ||
| shouldDeregister: () => false, | ||
| coepCredentialless: () => (window.chrome !== undefined || window.netscape !== undefined), | ||
| doReload: () => window.location.reload(), | ||
| quiet: false, | ||
| ...window.coi | ||
| }; | ||
|
|
||
| const n = navigator; | ||
|
|
||
| if (n.serviceWorker && n.serviceWorker.controller) { | ||
| n.serviceWorker.controller.postMessage({ | ||
| type: "coepCredentialless", | ||
| value: coi.coepCredentialless(), | ||
| }); | ||
|
|
||
| if (coi.shouldDeregister()) { | ||
| n.serviceWorker.controller.postMessage({ type: "deregister" }); | ||
| } | ||
| } | ||
|
|
||
| // If we're already coi: do nothing. Perhaps it's due to this script doing its job, or COOP/COEP are | ||
| // already set from the origin server. Also if the browser has no notion of crossOriginIsolated, just give up here. | ||
| if (window.crossOriginIsolated !== false || !coi.shouldRegister()) return; | ||
|
|
||
| if (!window.isSecureContext) { | ||
| !coi.quiet && console.log("COOP/COEP Service Worker not registered, a secure context is required."); | ||
| return; | ||
| } | ||
|
|
||
| // In some environments (e.g. Chrome incognito mode) this won't be available | ||
| if (n.serviceWorker) { | ||
| n.serviceWorker.register(window.document.currentScript.src).then( | ||
| (registration) => { | ||
| !coi.quiet && console.log("COOP/COEP Service Worker registered", registration.scope); | ||
|
|
||
| registration.addEventListener("updatefound", () => { | ||
| !coi.quiet && console.log("Reloading page to make use of updated COOP/COEP Service Worker."); | ||
| coi.doReload(); | ||
| }); | ||
|
|
||
| // If the registration is active, but it's not controlling the page | ||
| if (registration.active && !n.serviceWorker.controller) { | ||
| !coi.quiet && console.log("Reloading page to make use of COOP/COEP Service Worker."); | ||
| coi.doReload(); | ||
| } | ||
| }, | ||
| (err) => { | ||
| !coi.quiet && console.error("COOP/COEP Service Worker failed to register:", err); | ||
| } | ||
| ); | ||
| } | ||
| })(); | ||
| } |
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