rrweb sends message to cross-origin iframe to force snapshot

.changeset/rotten-squids-run.md

@@ -0,0 +1,5 @@
+---
+'rrweb': patch
+---
+
+rrweb sends message to cross-origin iframe to force snapshot

packages/rrweb/src/record/iframe-manager.ts

@@ -21,6 +21,7 @@ export class IframeManager {
   private mirror: Mirror;
   private mutationCb: mutationCallBack;
   private wrappedEmit: (e: eventWithoutTime, isCheckout?: boolean) => void;
+  private takeFullSnapshot: (isCheckout?: boolean) => void;
   private loadListener?: (iframeEl: HTMLIFrameElement) => unknown;
   private stylesheetManager: StylesheetManager;
   private recordCrossOriginIframes: boolean;
@@ -31,9 +32,11 @@ export class IframeManager {
     stylesheetManager: StylesheetManager;
     recordCrossOriginIframes: boolean;
     wrappedEmit: (e: eventWithoutTime, isCheckout?: boolean) => void;
+    takeFullSnapshot: (isCheckout?: boolean) => void;
   }) {
     this.mutationCb = options.mutationCb;
     this.wrappedEmit = options.wrappedEmit;
+    this.takeFullSnapshot = options.takeFullSnapshot;
     this.stylesheetManager = options.stylesheetManager;
     this.recordCrossOriginIframes = options.recordCrossOriginIframes;
     this.crossOriginIframeStyleMirror = new CrossOriginIframeMirror(
@@ -47,10 +50,24 @@ export class IframeManager {
     }
   }
 
+  public setTakeFullSnapshot(takeFullSnapshot: (isCheckout?: boolean) => void) {
+    this.takeFullSnapshot = takeFullSnapshot;
+  }
+
   public addIframe(iframeEl: HTMLIFrameElement) {
     this.iframes.set(iframeEl, true);
     if (iframeEl.contentWindow)
       this.crossOriginIframeMap.set(iframeEl.contentWindow, iframeEl);
+
+    if (!iframeEl.contentDocument && iframeEl.contentWindow)
+      iframeEl.contentWindow.postMessage(
+        {
+          type: 'rrweb',
+          origin: window.location.origin,
+          snapshot: true,
+        },
+        '*',
+      );
   }
 
   public addLoadListener(cb: (iframeEl: HTMLIFrameElement) => unknown) {
@@ -95,10 +112,21 @@ export class IframeManager {
     )
       return;
 
-    const iframeSourceWindow = message.source;
+    const iframeSourceWindow = crossOriginMessageEvent.source;
     if (!iframeSourceWindow) return;
 
-    const iframeEl = this.crossOriginIframeMap.get(message.source);
+    if (
+      iframeSourceWindow == window.parent &&
+      window != window.parent &&
+      crossOriginMessageEvent.data.snapshot
+    ) {
+      this.takeFullSnapshot();
+      return;
+    }
+
+    const iframeEl = this.crossOriginIframeMap.get(
+      crossOriginMessageEvent.source,
+    );
     if (!iframeEl) return;
 
     const transformedEvent = this.transformCrossOriginEvent(

packages/rrweb/src/record/index.ts

@@ -41,8 +41,9 @@
 } from './error-handler';
 
 let wrappedEmit!: (e: eventWithoutTime, isCheckout?: boolean) => void;
-
-let takeFullSnapshot!: (isCheckout?: boolean) => void;
+let takeFullSnapshot: (isCheckout?: boolean) => void = () => {
+  /* no-op */
+};
 let canvasManager!: CanvasManager;
 let recording = false;
 
@@ -278,6 +279,7 @@
     stylesheetManager: stylesheetManager,
     recordCrossOriginIframes,
     wrappedEmit,
+    takeFullSnapshot,
   });
 
   /**
@@ -411,6 +413,7 @@
         mirror.getId(document),
       );
   };
+  iframeManager.setTakeFullSnapshot(takeFullSnapshot);
 
   try {
     const handlers: listenerHandler[] = [];
@@ -534,7 +537,7 @@
             plugins
               ?.filter((p) => p.observer)
               ?.map((p) => ({
                 observer: p.observer!,
                 options: p.options,
                 callback: (payload: object) =>
                   wrappedEmit({
@@ -552,7 +555,7 @@
 
     iframeManager.addLoadListener((iframeEl) => {
       try {
         handlers.push(observe(iframeEl.contentDocument!));
       } catch (error) {
         // TODO: handle internal error
         console.warn(error);

packages/rrweb/src/types.ts

@@ -216,6 +216,7 @@ export type CrossOriginIframeMessageEventContent<T = eventWithTime> = {
   // The origin of the iframe which originally emits this message. It is used to check the integrity of message and to filter out the rrweb messages which are forwarded by some sites.
   origin: string;
   isCheckout?: boolean;
+  snapshot?: boolean;
 };
 export type CrossOriginIframeMessageEvent =
   MessageEvent<CrossOriginIframeMessageEventContent>;