__tests__/referer_proxy.test.mjs

@@ -29,16 +29,17 @@ function buildModule(code) {
   return `(async () => {\n${code}\n})();\n`;
 }
 
-// A fresh mock of the chrome APIs the worker touches. `onBeforeSendHeaders`,
+  // A fresh mock of the chrome APIs the worker touches. `onBeforeRequest` and
-// `onBeforeRequest`, and `tabs.onRemoved` capture their listener so the test can
+  // `tabs.onRemoved` capture their listener, and `tabs.get` serves the source
-// drive them; `declarativeNetRequest.updateSessionRules` records the live rules.
+  // tab's URL (the captured referer); `declarativeNetRequest.updateSessionRules`
+  // records the live rules.
 function makeChromeEnv() {
   const storage = {};
   const handlers = { onMessage: [] };
+  const tabUrls = {};
   let sessionRules = {};
 
   const webRequest = {
-    onBeforeSendHeaders: { addListener: (cb, filter) => { handlers.onBeforeSendHeaders = cb; handlers.onBeforeSendHeadersFilter = filter; } },
     onBeforeRequest: { addListener: (cb) => { handlers.onBeforeRequest = cb; } },
     };
 
@@ -62,6 +63,7 @@ function makeChromeEnv() {
      },
     webRequest,
      tabs: {
+      get: async (tabId) => tabUrls[tabId] ? { tabId, url: tabUrls[tabId] } : undefined,
       onRemoved: { addListener: (cb) => { handlers.onRemoved = cb; } },
        },
     runtime: { onMessage: { addListener: (cb) => { handlers.onMessage.push(cb); } } },
@@ -76,7 +78,9 @@ function makeChromeEnv() {
       },
    };
 
-  return { chrome, handlers, storage, getSessionRules: () => sessionRules };
+  return { chrome, handlers, storage, tabUrls,
+     setTabUrl: (tabId, url) => { tabUrls[tabId] = url; },
+     getSessionRules: () => sessionRules };
 }
 
 // Load the worker into a fresh environment. `data:` URLs are cached by Node, so
@@ -92,12 +96,12 @@ async function loadBackground(env) {
   return module;
 }
 
-function videoDetails(tabId, url, referer) {
+// Drive a referer capture the way the worker now does it: the worker reads the
-  return {
+// source tab's URL (via chrome.tabs.get) as the provider referer, so we set the
-    tabId,
+// tab's URL and fire an onBeforeRequest for a video URL on that tab.
-    url,
+async function capture(env, videoUrl, referer) {
-    requestHeaders: referer ? [{ name: 'Referer', value: referer }] : [],
+  env.setTabUrl(11, referer);
-   };
+  await env.handlers.onBeforeRequest({ tabId: 11, url: videoUrl });
 }
 
 describe('PR#5: per-host referer capture + proxy race', () => {
@@ -109,9 +113,7 @@ describe('PR#5: per-host referer capture + proxy race', () => {
     await loadBackground(env);
 
       // A live source tab captures the provider referer for its CDN host.
-    const cap = env.handlers.onBeforeSendHeaders;
+    await capture(env, 'https://cdnA.example.com/hls/live/seg-1.ts', 'https://pageA.example.com/watch');
-    if (!cap) throw new Error('onBeforeSendHeaders listener was not registered');
-    await cap(videoDetails(11, 'https://cdnA.example.com/hls/live/seg-1.ts', 'https://pageA.example.com/watch'));
 
     const rA = env.storage['goon_referers']?.['example.com'];
     if (!rA) throw new Error('referer was not captured for cdnA');
@@ -136,9 +138,7 @@ describe('PR#5: per-host referer capture + proxy race', () => {
     global.chrome = env.chrome;
     await loadBackground(env);
 
-    await env.handlers.onBeforeSendHeaders(
+    await capture(env, 'https://cdnB.example.com/video/x/master.m3u8', 'https://pageB.example.com/v');
-      videoDetails(11, 'https://cdnB.example.com/video/x/master.m3u8', 'https://pageB.example.com/v')
-     );
 
        // The very tab that captured the referer now closes.
     await env.handlers.onRemoved(11);
@@ -253,8 +253,7 @@ describe('PR#5: per-host referer capture + proxy race', () => {
     await loadBackground(env);
 
        // Capture the provider referer for hv-h.phncdn.com (one edge subdomain).
-    await env.handlers.onBeforeSendHeaders(
+    await capture(env, 'https://hv-h.phncdn.com/hls/live/seg-1.ts', 'https://provider.example.com/watch');
-      videoDetails(11, 'https://hv-h.phncdn.com/hls/live/seg-1.ts', 'https://provider.example.com/watch'));
 
        // Proxy a SIBLING subdomain ev-h.phncdn.com with NO referer in the message:
      // the SW must resolve it from the domain-keyed store.
@@ -315,8 +314,7 @@ describe('PR#5: per-host referer capture + proxy race', () => {
     await loadBackground(env);
 
         // Capture for hv-h.phncdn.com only.
-    await env.handlers.onBeforeSendHeaders(
+    await capture(env, 'https://hv-h.phncdn.com/hls/live/seg-1.ts', 'https://provider.example.com/watch');
-      videoDetails(11, 'https://hv-h.phncdn.com/hls/live/seg-1.ts', 'https://provider.example.com/watch'));
 
     const handler = env.handlers.onMessage[env.handlers.onMessage.length - 1];
     let resp;
@@ -339,20 +337,28 @@ describe('PR#5: per-host referer capture + proxy race', () => {
        }
     });
 
-   // Regression for the live 412 bug: the capture listener MUST request
+     // Regression for the live 412 bug: the worker captures the provider referer
-   // requestHeaders via extraInfoSpec, or details.requestHeaders is undefined and
+     // from the source tab's URL via chrome.tabs.get inside onBeforeRequest. The
-   // readReferer() returns '' for every request — so no referer is ever stored,
+     // old path read request headers via onBeforeSendHeaders + extraInfoSpec, which
-   // every entry stays referer-less, and the phncdn proxy 412s. The callback-level
+     // is rejected by some Chromium builds and fails the whole service worker, so it
-   // tests above pass even without this (they hand requestHeaders in directly), so
+     // was removed; this asserts the new tab-URL capture is wired up and actually
-   // this asserts the registration itself.
+     // stores a referer.
-  it('the onBeforeSendHeaders capture listener requests requestHeaders via extraInfoSpec', async () => {
+   it('the onBeforeRequest capture reads the referer from the source tab URL', async () => {
      const env = makeChromeEnv();
      global.chrome = env.chrome;
      await loadBackground(env);
-    const filter = env.handlers.onBeforeSendHeadersFilter;
+
-    if (!filter) throw new Error('onBeforeSendHeaders listener registered no filter object');
+     const cap = env.handlers.onBeforeRequest;
-    if (!Array.isArray(filter.extraInfoSpec) || !filter.extraInfoSpec.includes('requestHeaders')) {
+     if (!cap) throw new Error('onBeforeRequest listener was not registered');
-      throw new Error('capture listener did not request requestHeaders via extraInfoSpec: ' + JSON.stringify(filter));
+
+     // A video request for cdnA from a tab whose URL IS the provider referer.
+     env.setTabUrl(11, 'https://pageA.example.com/watch');
+     await cap({ tabId: 11, url: 'https://cdnA.example.com/hls/live/seg-1.ts' });
+
+     const rA = env.storage['goon_referers']?.['example.com'];
+     if (!rA) throw new Error('referer was not captured from the source tab URL');
+     if (rA.referer !== 'https://pageA.example.com/watch') {
+       throw new Error('captured referer wrong: ' + JSON.stringify(rA));
         }
      });
    });