From 4fa87c823a2aa65573efc28437d3b4064cc9d6de Mon Sep 17 00:00:00 2001
From: Lucas Garron
Date: Fri, 8 Sep 2023 07:00:12 -0700
Subject: [PATCH] Initial version.
---
.gitignore | 1 +
Makefile | 7 +
package-lock.json | 451 +++++++++++++++++++++++++
package.json | 5 +
src/WorkerExecutionOriginPolyfill.d.ts | 10 +
src/WorkerExecutionOriginPolyfill.js | 29 ++
src/assert.js | 39 +++
src/classic-worker.js | 5 +
src/index.css | 31 ++
src/index.html | 47 +++
src/index.js | 59 ++++
src/module-worker.js | 5 +
12 files changed, 689 insertions(+)
create mode 100644 .gitignore
create mode 100644 Makefile
create mode 100644 package-lock.json
create mode 100644 package.json
create mode 100644 src/WorkerExecutionOriginPolyfill.d.ts
create mode 100644 src/WorkerExecutionOriginPolyfill.js
create mode 100644 src/assert.js
create mode 100644 src/classic-worker.js
create mode 100644 src/index.css
create mode 100644 src/index.html
create mode 100644 src/index.js
create mode 100644 src/module-worker.js
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..07e6e47
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/node_modules
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..7c74aab
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,7 @@
+.PHONY: serve
+serve: node_modules
+ npx http-server src --cors --port 8080
+
+.PHONY: node_modules
+node_modules:
+ npm install
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..69c1016
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,451 @@
+{
+ "name": "worker-execution-origin-polyfill",
+ "lockfileVersion": 3,
+ "requires": true,
+ "packages": {
+ "": {
+ "devDependencies": {
+ "http-server": "^14.1.1"
+ }
+ },
+ "node_modules/ansi-styles": {
+ "version": "4.3.0",
+ "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
+ "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
+ "dev": true,
+ "dependencies": {
+ "color-convert": "^2.0.1"
+ },
+ "engines": {
+ "node": ">=8"
+ },
+ "funding": {
+ "url": "https://github.com/chalk/ansi-styles?sponsor=1"
+ }
+ },
+ "node_modules/async": {
+ "version": "2.6.4",
+ "resolved": "https://registry.npmjs.org/async/-/async-2.6.4.tgz",
+ "integrity": "sha512-mzo5dfJYwAn29PeiJ0zvwTo04zj8HDJj0Mn8TD7sno7q12prdbnasKJHhkm2c1LgrhlJ0teaea8860oxi51mGA==",
+ "dev": true,
+ "dependencies": {
+ "lodash": "^4.17.14"
+ }
+ },
+ "node_modules/basic-auth": {
+ "version": "2.0.1",
+ "resolved": "https://registry.npmjs.org/basic-auth/-/basic-auth-2.0.1.tgz",
+ "integrity": "sha512-NF+epuEdnUYVlGuhaxbbq+dvJttwLnGY+YixlXlME5KpQ5W3CnXA5cVTneY3SPbPDRkcjMbifrwmFYcClgOZeg==",
+ "dev": true,
+ "dependencies": {
+ "safe-buffer": "5.1.2"
+ },
+ "engines": {
+ "node": ">= 0.8"
+ }
+ },
+ "node_modules/call-bind": {
+ "version": "1.0.2",
+ "resolved": "https://registry.npmjs.org/call-bind/-/call-bind-1.0.2.tgz",
+ "integrity": "sha512-7O+FbCihrB5WGbFYesctwmTKae6rOiIzmz1icreWJ+0aA7LJfuqhEso2T9ncpcFtzMQtzXf2QGGueWJGTYsqrA==",
+ "dev": true,
+ "dependencies": {
+ "function-bind": "^1.1.1",
+ "get-intrinsic": "^1.0.2"
+ },
+ "funding": {
+ "url": "https://github.com/sponsors/ljharb"
+ }
+ },
+ "node_modules/chalk": {
+ "version": "4.1.2",
+ "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.2.tgz",
+ "integrity": "sha512-oKnbhFyRIXpUuez8iBMmyEa4nbj4IOQyuhc/wy9kY7/WVPcwIO9VA668Pu8RkO7+0G76SLROeyw9CpQ061i4mA==",
+ "dev": true,
+ "dependencies": {
+ "ansi-styles": "^4.1.0",
+ "supports-color": "^7.1.0"
+ },
+ "engines": {
+ "node": ">=10"
+ },
+ "funding": {
+ "url": "https://github.com/chalk/chalk?sponsor=1"
+ }
+ },
+ "node_modules/color-convert": {
+ "version": "2.0.1",
+ "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
+ "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
+ "dev": true,
+ "dependencies": {
+ "color-name": "~1.1.4"
+ },
+ "engines": {
+ "node": ">=7.0.0"
+ }
+ },
+ "node_modules/color-name": {
+ "version": "1.1.4",
+ "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
+ "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==",
+ "dev": true
+ },
+ "node_modules/corser": {
+ "version": "2.0.1",
+ "resolved": "https://registry.npmjs.org/corser/-/corser-2.0.1.tgz",
+ "integrity": "sha512-utCYNzRSQIZNPIcGZdQc92UVJYAhtGAteCFg0yRaFm8f0P+CPtyGyHXJcGXnffjCybUCEx3FQ2G7U3/o9eIkVQ==",
+ "dev": true,
+ "engines": {
+ "node": ">= 0.4.0"
+ }
+ },
+ "node_modules/debug": {
+ "version": "3.2.7",
+ "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.7.tgz",
+ "integrity": "sha512-CFjzYYAi4ThfiQvizrFQevTTXHtnCqWfe7x1AhgEscTz6ZbLbfoLRLPugTQyBth6f8ZERVUSyWHFD/7Wu4t1XQ==",
+ "dev": true,
+ "dependencies": {
+ "ms": "^2.1.1"
+ }
+ },
+ "node_modules/eventemitter3": {
+ "version": "4.0.7",
+ "resolved": "https://registry.npmjs.org/eventemitter3/-/eventemitter3-4.0.7.tgz",
+ "integrity": "sha512-8guHBZCwKnFhYdHr2ysuRWErTwhoN2X8XELRlrRwpmfeY2jjuUN4taQMsULKUVo1K4DvZl+0pgfyoysHxvmvEw==",
+ "dev": true
+ },
+ "node_modules/follow-redirects": {
+ "version": "1.15.2",
+ "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.15.2.tgz",
+ "integrity": "sha512-VQLG33o04KaQ8uYi2tVNbdrWp1QWxNNea+nmIB4EVM28v0hmP17z7aG1+wAkNzVq4KeXTq3221ye5qTJP91JwA==",
+ "dev": true,
+ "funding": [
+ {
+ "type": "individual",
+ "url": "https://github.com/sponsors/RubenVerborgh"
+ }
+ ],
+ "engines": {
+ "node": ">=4.0"
+ },
+ "peerDependenciesMeta": {
+ "debug": {
+ "optional": true
+ }
+ }
+ },
+ "node_modules/function-bind": {
+ "version": "1.1.1",
+ "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.1.tgz",
+ "integrity": "sha512-yIovAzMX49sF8Yl58fSCWJ5svSLuaibPxXQJFLmBObTuCr0Mf1KiPopGM9NiFjiYBCbfaa2Fh6breQ6ANVTI0A==",
+ "dev": true
+ },
+ "node_modules/get-intrinsic": {
+ "version": "1.2.1",
+ "resolved": "https://registry.npmjs.org/get-intrinsic/-/get-intrinsic-1.2.1.tgz",
+ "integrity": "sha512-2DcsyfABl+gVHEfCOaTrWgyt+tb6MSEGmKq+kI5HwLbIYgjgmMcV8KQ41uaKz1xxUcn9tJtgFbQUEVcEbd0FYw==",
+ "dev": true,
+ "dependencies": {
+ "function-bind": "^1.1.1",
+ "has": "^1.0.3",
+ "has-proto": "^1.0.1",
+ "has-symbols": "^1.0.3"
+ },
+ "funding": {
+ "url": "https://github.com/sponsors/ljharb"
+ }
+ },
+ "node_modules/has": {
+ "version": "1.0.3",
+ "resolved": "https://registry.npmjs.org/has/-/has-1.0.3.tgz",
+ "integrity": "sha512-f2dvO0VU6Oej7RkWJGrehjbzMAjFp5/VKPp5tTpWIV4JHHZK1/BxbFRtf/siA2SWTe09caDmVtYYzWEIbBS4zw==",
+ "dev": true,
+ "dependencies": {
+ "function-bind": "^1.1.1"
+ },
+ "engines": {
+ "node": ">= 0.4.0"
+ }
+ },
+ "node_modules/has-flag": {
+ "version": "4.0.0",
+ "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-4.0.0.tgz",
+ "integrity": "sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ==",
+ "dev": true,
+ "engines": {
+ "node": ">=8"
+ }
+ },
+ "node_modules/has-proto": {
+ "version": "1.0.1",
+ "resolved": "https://registry.npmjs.org/has-proto/-/has-proto-1.0.1.tgz",
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+ "dev": true,
+ "engines": {
+ "node": ">= 0.4"
+ },
+ "funding": {
+ "url": "https://github.com/sponsors/ljharb"
+ }
+ },
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+ "resolved": "https://registry.npmjs.org/has-symbols/-/has-symbols-1.0.3.tgz",
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+ "engines": {
+ "node": ">= 0.4"
+ },
+ "funding": {
+ "url": "https://github.com/sponsors/ljharb"
+ }
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+ "dev": true,
+ "bin": {
+ "he": "bin/he"
+ }
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+ "dev": true,
+ "dependencies": {
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+ }
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+ "dev": true,
+ "dependencies": {
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+ "follow-redirects": "^1.0.0",
+ "requires-port": "^1.0.0"
+ },
+ "engines": {
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+ }
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+ "secure-compare": "3.0.1",
+ "union": "~0.5.0",
+ "url-join": "^4.0.1"
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+ "bin": {
+ "http-server": "bin/http-server"
+ },
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+ "dev": true,
+ "bin": {
+ "mime": "cli.js"
+ },
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+ "funding": {
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+ "debug": "^3.2.7",
+ "mkdirp": "^0.5.6"
+ },
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+ "engines": {
+ "node": ">=0.6"
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+ "funding": {
+ "url": "https://github.com/sponsors/ljharb"
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+ "funding": {
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+ "dev": true
+ },
+ "node_modules/whatwg-encoding": {
+ "version": "2.0.0",
+ "resolved": "https://registry.npmjs.org/whatwg-encoding/-/whatwg-encoding-2.0.0.tgz",
+ "integrity": "sha512-p41ogyeMUrw3jWclHWTQg1k05DSVXPLcVxRTYsXUk+ZooOCZLcoYgPZ/HL/D/N+uQPOtcp1me1WhBEaX02mhWg==",
+ "dev": true,
+ "dependencies": {
+ "iconv-lite": "0.6.3"
+ },
+ "engines": {
+ "node": ">=12"
+ }
+ }
+ }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..11be930
--- /dev/null
+++ b/package.json
@@ -0,0 +1,5 @@
+{
+ "devDependencies": {
+ "http-server": "^14.1.1"
+ }
+}
diff --git a/src/WorkerExecutionOriginPolyfill.d.ts b/src/WorkerExecutionOriginPolyfill.d.ts
new file mode 100644
index 0000000..281c2cf
--- /dev/null
+++ b/src/WorkerExecutionOriginPolyfill.d.ts
@@ -0,0 +1,10 @@
+declare class WorkerExecutionOriginPolyfill extends Worker {
+ constructor(
+ url: URL | string,
+ options?: {
+ type?: "classic" | "module";
+ credentials?: "omit" | "same-origin" | "include";
+ executionOrigin?: "url-origin" | "inherit-origin";
+ },
+ );
+}
diff --git a/src/WorkerExecutionOriginPolyfill.js b/src/WorkerExecutionOriginPolyfill.js
new file mode 100644
index 0000000..6ed00cb
--- /dev/null
+++ b/src/WorkerExecutionOriginPolyfill.js
@@ -0,0 +1,29 @@
+// This script is checked in as `.js` to demonstrate , but a `.ts` version is generated by TypeScript.
+
+// When substituted by a browser-native alternative, this would:
+// - Use `url.toString()` instead of a `blob:` URL to check against CSP `worker-src` (and therefore not count as using `blob:`).
+// - Note that both variants of the import syntax will also count it as a `script-src`.
+// - Not leak an object URL.
+function sameOriginURL(url, type) {
+ const quotedImportURL = JSON.stringify(url.toString());
+ const importSource =
+ type === "module"
+ ? `import ${quotedImportURL};`
+ : `importScripts(${quotedImportURL});`;
+ const blob = new Blob([importSource], {
+ type: "text/javascript",
+ });
+ return URL.createObjectURL(blob);
+}
+
+export class WorkerExecutionOriginPolyfill extends Worker {
+ constructor(
+ url,
+ options,
+ ) {
+ if (options?.executionOrigin === "inherit-origin") {
+ url = sameOriginURL(url, options?.type);
+ }
+ super(url, options);
+ }
+}
diff --git a/src/assert.js b/src/assert.js
new file mode 100644
index 0000000..dafcb1d
--- /dev/null
+++ b/src/assert.js
@@ -0,0 +1,39 @@
+export let passedAllTests = true;
+
+let i = 0;
+function showResult(consoleFn, resultMessage) {
+ consoleFn(resultMessage);
+ const li = globalThis.document?.querySelector("#results").children[i++];
+ if (li) {
+ li.textContent = resultMessage;
+ }
+}
+
+export function assertString(observed, expected) {
+ if (observed !== expected) {
+ showResult(console.error, `✅ Expected \"${expected}\", observed \"${observed}\"`)
+ }
+ showResult(console.log, `✅ ${expected}`)
+}
+
+export async function assertException(fn, expectedConstructor) {
+ try {
+ const value = await fn();
+ showResult(console.error, `❌ Expected a \`${expectedConstructor.name}\` error, saw a returned value: ${value}`);
+ passedAllTests = false;
+ } catch (e) {
+ if (! (e instanceof expectedConstructor)) {
+ showResult(console.error, `❌ Expected a \`${expectedConstructor.name}\` error, observed exception: ${e}`);
+ passedAllTests = false;
+ }
+ showResult(console.log, `✅ Exception matches expected constructor: ${expectedConstructor.name}`);
+ }
+}
+
+export function showPassedAllTests() {
+ console.log("Passed all tests?", passedAllTests);
+ const span = globalThis.document?.querySelector("#passed-all-tests");
+ if (span) {
+ span.textContent = passedAllTests ? "✅ YES" : "❌ NO";
+ }
+}
diff --git a/src/classic-worker.js b/src/classic-worker.js
new file mode 100644
index 0000000..775c39d
--- /dev/null
+++ b/src/classic-worker.js
@@ -0,0 +1,5 @@
+undeclaredVariablesAreOnlyAllowedInClassicScripts = " but it's classic";
+
+self.addEventListener("message", function (e) {
+ self.postMessage(e.data + undeclaredVariablesAreOnlyAllowedInClassicScripts);
+});
diff --git a/src/index.css b/src/index.css
new file mode 100644
index 0000000..71946e9
--- /dev/null
+++ b/src/index.css
@@ -0,0 +1,31 @@
+/* From: https://github.com/lgarron/minimal-html-style (v1.0.0) */
+
+html {
+ font-family: -apple-system, Roboto, Ubuntu, Tahoma, sans-serif;
+ font-size: 1.25rem;
+ padding: 2em;
+ line-height: 1.5em;
+ display: grid;
+ justify-content: center;
+}
+
+body {
+ width: 100%;
+ max-width: 40em;
+ margin: 0;
+}
+
+@media (prefers-color-scheme: dark) {
+ html {
+ background: #000D;
+ color: #EEE;
+ }
+
+ a {
+ color: #669df5;
+ }
+
+ a:visited {
+ color: #af73d5;
+ }
+}
diff --git a/src/index.html b/src/index.html
new file mode 100644
index 0000000..8132013
--- /dev/null
+++ b/src/index.html
@@ -0,0 +1,47 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+ Worker executionOrigin
tests
+ Note:
+
+ The code currently assumes that subdomains of localhost
resolve to localhost
. This is
+ the case in Chrome and Firefox but not Safari. Add the following line to your /etc/hosts
file to test
+ in Safari:
+
+ 127.0.0.1 cross-origin.localhost
+
+
+ The code intentionally tries to load workers using the incorrect type
. This results in error
+ messages
+ in the console that are not part of the test.
+
+
+
+ Test Results
+
+ ⏳ …
+ ⏳ …
+ ⏳ …
+ ⏳ …
+ ⏳ …
+ ⏳ …
+ ⏳ …
+ ⏳ …
+
+
+ Passed all tests?
+ ⏳ PENDING
+
+
+
+
diff --git a/src/index.js b/src/index.js
new file mode 100644
index 0000000..010a0cf
--- /dev/null
+++ b/src/index.js
@@ -0,0 +1,59 @@
+import { WorkerExecutionOriginPolyfill } from "./WorkerExecutionOriginPolyfill.js";
+import { assertException, assertString, passedAllTests, showPassedAllTests } from "./assert.js";
+
+function testWorker(message, workerArguments) {
+ return new Promise((resolve, reject) => {
+ try {
+ const worker = new WorkerExecutionOriginPolyfill(...workerArguments);
+ worker.addEventListener("message", (e) => resolve(e.data));
+ worker.addEventListener("error", (e) => reject(e));
+ worker.postMessage(message);
+ } catch (e) {
+ reject(e);
+ }
+ });
+}
+
+// Same origin
+assertString(await testWorker("same origin", [
+ import.meta.resolve("./classic-worker.js"),
+ {}
+]), "same origin but it's classic");
+
+assertString(await testWorker("same origin", [
+ import.meta.resolve("./module-worker.js"),
+ { type: "module" }
+]), "same origin but it's a module");
+
+// Cross-origin without inheriting origin
+await assertException(async () => testWorker("cross origin", [
+ "http://cross-origin.localhost:8080/classic-worker.js",
+ {}
+]), DOMException);
+await assertException(async () => testWorker("cross origin", [
+ "http://cross-origin.localhost:8080/module-worker.js",
+ { type: "module" }
+]), DOMException);
+
+// Cross-origin, inheriting origin
+assertString(await testWorker("cross origin", [
+ "http://cross-origin.localhost:8080/classic-worker.js",
+ { executionOrigin: "inherit-origin" }
+]), "cross origin but it's classic");
+
+assertString(await testWorker("cross origin", [
+ "http://cross-origin.localhost:8080/module-worker.js",
+ { type: "module", executionOrigin: "inherit-origin" }
+]), "cross origin but it's a module");
+
+// Cross-origin, inheriting origin but with mismatched `type`
+await assertException(async () => testWorker("cross origin", [
+ "http://cross-origin.localhost:8080/classic-worker.js",
+ { type: "module", executionOrigin: "inherit-origin" }
+]), ErrorEvent);
+await assertException(async () => testWorker("cross origin", [
+ "http://cross-origin.localhost:8080/module-worker.js",
+ { executionOrigin: "inherit-origin" }
+]), ErrorEvent);
+
+showPassedAllTests();
diff --git a/src/module-worker.js b/src/module-worker.js
new file mode 100644
index 0000000..0512f43
--- /dev/null
+++ b/src/module-worker.js
@@ -0,0 +1,5 @@
+const awaitIsOnlyAllowedInModuleScripts = await " but it's a module";
+
+self.addEventListener("message", function (e) {
+ self.postMessage(e.data + awaitIsOnlyAllowedInModuleScripts);
+});