chore(tracing): look up snapshot resources only in the same context (#34645)

packages/playwright-core/src/server/trace/recorder/tracing.ts

@@ -103,7 +103,8 @@ export class Tracing extends SdkObject implements InstrumentationListener, Snaps
       wallTime: 0,
       monotonicTime: 0,
       sdkLanguage: context.attribution.playwright.options.sdkLanguage,
-      testIdAttributeName
+      testIdAttributeName,
+      contextId: context.guid,
     };
     if (context instanceof BrowserContext) {
       this._snapshotter = new Snapshotter(context, this);

packages/playwright-core/src/server/trace/test/inMemorySnapshotter.ts

@@ -72,7 +72,7 @@ export class InMemorySnapshotter implements SnapshotterDelegate, HarTracerDelega
   }
 
   onEntryFinished(entry: har.Entry) {
-    this._storage.addResource(entry);
+    this._storage.addResource('', entry);
   }
 
   onContentBlob(sha1: string, buffer: Buffer) {
@@ -85,7 +85,7 @@ export class InMemorySnapshotter implements SnapshotterDelegate, HarTracerDelega
 
   onFrameSnapshot(snapshot: FrameSnapshot): void {
     ++this._snapshotCount;
-    const renderer = this._storage.addFrameSnapshot(snapshot, []);
+    const renderer = this._storage.addFrameSnapshot('', snapshot, []);
     this._snapshotReadyPromises.get(snapshot.snapshotName || '')?.resolve(renderer);
   }
 

packages/trace-viewer/src/sw/main.ts

@@ -120,14 +120,16 @@ async function doFetch(event: FetchEvent): Promise<Response> {
       const { snapshotServer } = loadedTraces.get(traceUrl!) || {};
       if (!snapshotServer)
         return new Response(null, { status: 404 });
-      return snapshotServer.serveSnapshotInfo(relativePath, url.searchParams);
+      const pageOrFrameId = relativePath.substring('/snapshotInfo/'.length);
+      return snapshotServer.serveSnapshotInfo(pageOrFrameId, url.searchParams);
     }
 
     if (relativePath.startsWith('/snapshot/')) {
       const { snapshotServer } = loadedTraces.get(traceUrl!) || {};
       if (!snapshotServer)
         return new Response(null, { status: 404 });
-      const response = snapshotServer.serveSnapshot(relativePath, url.searchParams, url.href);
+      const pageOrFrameId = relativePath.substring('/snapshot/'.length);
+      const response = snapshotServer.serveSnapshot(pageOrFrameId, url.searchParams, url.href);
       if (isDeployedAsHttps)
         response.headers.set('Content-Security-Policy', 'upgrade-insecure-requests');
       return response;
@@ -137,7 +139,8 @@ async function doFetch(event: FetchEvent): Promise<Response> {
       const { snapshotServer } = loadedTraces.get(traceUrl!) || {};
       if (!snapshotServer)
         return new Response(null, { status: 404 });
-      return snapshotServer.serveClosestScreenshot(relativePath, url.searchParams);
+      const pageOrFrameId = relativePath.substring('/closest-screenshot/'.length);
+      return snapshotServer.serveClosestScreenshot(pageOrFrameId, url.searchParams);
     }
 
     if (relativePath.startsWith('/sha1/')) {

packages/trace-viewer/src/sw/snapshotServer.ts

@@ -31,8 +31,8 @@ export class SnapshotServer {
     this._resourceLoader = resourceLoader;
   }
 
-  serveSnapshot(pathname: string, searchParams: URLSearchParams, snapshotUrl: string): Response {
+  serveSnapshot(pageOrFrameId: string, searchParams: URLSearchParams, snapshotUrl: string): Response {
-    const snapshot = this._snapshot(pathname.substring('/snapshot'.length), searchParams);
+    const snapshot = this._snapshot(pageOrFrameId, searchParams);
     if (!snapshot)
       return new Response(null, { status: 404 });
 
@@ -41,16 +41,16 @@ export class SnapshotServer {
     return new Response(renderedSnapshot.html, { status: 200, headers: { 'Content-Type': 'text/html; charset=utf-8' } });
   }
 
-  async serveClosestScreenshot(pathname: string, searchParams: URLSearchParams): Promise<Response> {
+  async serveClosestScreenshot(pageOrFrameId: string, searchParams: URLSearchParams): Promise<Response> {
-    const snapshot = this._snapshot(pathname.substring('/closest-screenshot'.length), searchParams);
+    const snapshot = this._snapshot(pageOrFrameId, searchParams);
     const sha1 = snapshot?.closestScreenshot();
     if (!sha1)
       return new Response(null, { status: 404 });
     return new Response(await this._resourceLoader(sha1));
   }
 
-  serveSnapshotInfo(pathname: string, searchParams: URLSearchParams): Response {
+  serveSnapshotInfo(pageOrFrameId: string, searchParams: URLSearchParams): Response {
-    const snapshot = this._snapshot(pathname.substring('/snapshotInfo'.length), searchParams);
+    const snapshot = this._snapshot(pageOrFrameId, searchParams);
     return this._respondWithJson(snapshot ? {
       viewport: snapshot.viewport(),
       url: snapshot.snapshot().frameUrl,
@@ -61,9 +61,9 @@ export class SnapshotServer {
     });
   }
 
-  private _snapshot(pathname: string, params: URLSearchParams) {
+  private _snapshot(pageOrFrameId: string, params: URLSearchParams) {
     const name = params.get('name')!;
-    return this._snapshotStorage.snapshotByName(pathname.slice(1), name);
+    return this._snapshotStorage.snapshotByName(pageOrFrameId, name);
   }
 
   private _respondWithJson(object: any): Response {

packages/trace-viewer/src/sw/snapshotStorage.ts

@@ -20,19 +20,19 @@ import type { PageEntry } from '../types/entries';
 import { LRUCache } from './lruCache';
 
 export class SnapshotStorage {
-  private _resources: ResourceSnapshot[] = [];
   private _frameSnapshots = new Map<string, {
     raw: FrameSnapshot[],
-    renderers: SnapshotRenderer[]
+    renderers: SnapshotRenderer[],
   }>();
   private _cache = new LRUCache<SnapshotRenderer, string>(100_000_000);  // 100MB per each trace
+  private _contextToResources = new Map<string, ResourceSnapshot[]>();
 
-  addResource(resource: ResourceSnapshot): void {
+  addResource(contextId: string, resource: ResourceSnapshot): void {
     resource.request.url = rewriteURLForCustomProtocol(resource.request.url);
-    this._resources.push(resource);
+    this._ensureResourcesForContext(contextId).push(resource);
   }
 
-  addFrameSnapshot(snapshot: FrameSnapshot, screencastFrames: PageEntry['screencastFrames']) {
+  addFrameSnapshot(contextId: string, snapshot: FrameSnapshot, screencastFrames: PageEntry['screencastFrames']) {
     for (const override of snapshot.resourceOverrides)
       override.url = rewriteURLForCustomProtocol(override.url);
     let frameSnapshots = this._frameSnapshots.get(snapshot.frameId);
@@ -46,7 +46,8 @@ export class SnapshotStorage {
         this._frameSnapshots.set(snapshot.pageId, frameSnapshots);
     }
     frameSnapshots.raw.push(snapshot);
-    const renderer = new SnapshotRenderer(this._cache, this._resources, frameSnapshots.raw, screencastFrames, frameSnapshots.raw.length - 1);
+    const resources = this._ensureResourcesForContext(contextId);
+    const renderer = new SnapshotRenderer(this._cache, resources, frameSnapshots.raw, screencastFrames, frameSnapshots.raw.length - 1);
     frameSnapshots.renderers.push(renderer);
     return renderer;
   }
@@ -62,6 +63,16 @@ export class SnapshotStorage {
 
   finalize() {
     // Resources are not necessarily sorted in the trace file, so sort them now.
-    this._resources.sort((a, b) => (a._monotonicTime || 0) - (b._monotonicTime || 0));
+    for (const resources of this._contextToResources.values())
+      resources.sort((a, b) => (a._monotonicTime || 0) - (b._monotonicTime || 0));
+  }
+
+  private _ensureResourcesForContext(contextId: string): ResourceSnapshot[] {
+    let resources = this._contextToResources.get(contextId);
+    if (!resources) {
+      resources = [];
+      this._contextToResources.set(contextId, resources);
+    }
+    return resources;
   }
 }

packages/trace-viewer/src/sw/traceModel.ts

@@ -105,7 +105,7 @@ export class TraceModel {
       this.contextEntries.push(contextEntry);
     }
 
-    this._snapshotStorage!.finalize();
+    this._snapshotStorage.finalize();
   }
 
   async hasEntry(filename: string): Promise<boolean> {
@@ -153,5 +153,6 @@ function createEmptyContext(): ContextEntry {
     errors: [],
     stdio: [],
     hasSource: false,
+    contextId: '',
   };
 }

packages/trace-viewer/src/sw/traceModernizer.ts

@@ -92,6 +92,7 @@ export class TraceModernizer {
         contextEntry.sdkLanguage = event.sdkLanguage;
         contextEntry.options = event.options;
         contextEntry.testIdAttributeName = event.testIdAttributeName;
+        contextEntry.contextId = event.contextId ?? '';
         break;
       }
       case 'screencast-frame': {
@@ -156,11 +157,11 @@ export class TraceModernizer {
         break;
       }
       case 'resource-snapshot':
-        this._snapshotStorage.addResource(event.snapshot);
+        this._snapshotStorage.addResource(this._contextEntry.contextId, event.snapshot);
         contextEntry.resources.push(event.snapshot);
         break;
       case 'frame-snapshot':
-        this._snapshotStorage.addFrameSnapshot(event.snapshot, this._pageEntry(event.snapshot.pageId).screencastFrames);
+        this._snapshotStorage.addFrameSnapshot(this._contextEntry.contextId, event.snapshot, this._pageEntry(event.snapshot.pageId).screencastFrames);
         break;
     }
     // Make sure there is a page entry for each page, even without screencast frames,
@@ -388,12 +389,13 @@ export class TraceModernizer {
         wallTime: 0,
         monotonicTime: 0,
         sdkLanguage: 'javascript',
+        contextId: '',
       };
       result.push(event);
     }
     for (const event of events) {
       if (event.type === 'context-options') {
-        result.push({ ...event, monotonicTime: 0, origin: 'library' });
+        result.push({ ...event, monotonicTime: 0, origin: 'library', contextId: '' });
         continue;
       }
       // Take wall and monotonic time from the first event.

packages/trace-viewer/src/types/entries.ts

@@ -40,6 +40,7 @@ export type ContextEntry = {
   stdio: trace.StdioTraceEvent[];
   errors: trace.ErrorTraceEvent[];
   hasSource: boolean;
+  contextId: string;
 };
 
 export type PageEntry = {

packages/trace/src/trace.ts

@@ -44,6 +44,7 @@ export type ContextCreatedTraceEvent = {
   options: BrowserContextEventOptions,
   sdkLanguage?: Language,
   testIdAttributeName?: string,
+  contextId?: string,
 };
 
 export type ScreencastFrameTraceEvent = {