stream: validate undefined sizeAlgorithm in WritableStream

jazelly · aduh95 · commit e658ea6b2640 · 2025-01-31T01:16:43.000+01:00
PR-URL: #56067 Fixes: #56014 Refs: whatwg/streams#1333 Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: Jake Yuesong Li <jake.yuesong@gmail.com>
diff --git a/lib/internal/webstreams/writablestream.js b/lib/internal/webstreams/writablestream.js
@@ -1176,9 +1176,18 @@ function writableStreamDefaultControllerGetDesiredSize(controller){
 }
 
 function writableStreamDefaultControllerGetChunkSize(controller, chunk){
+ const{
+ stream,
+ sizeAlgorithm,
+ } = controller[kState];
+ if (sizeAlgorithm === undefined){
+ assert(stream[kState].state === 'errored' || stream[kState].state === 'erroring');
+ return 1;
+ }
+
 try{
 return FunctionPrototypeCall(
- controller[kState].sizeAlgorithm,
+ sizeAlgorithm,
 undefined,
 chunk);
 } catch (error){

-Original file line number
+Diff line change
+}
 functionwritableStreamDefaultControllerGetChunkSize(controller,chunk){
 +const{
 + stream,
 + sizeAlgorithm,
 +}=controller[kState];
 +if(sizeAlgorithm===undefined){
 +assert(stream[kState].state==='errored'||stream[kState].state==='erroring');
 +return1;
 +}
++
 try{
 returnFunctionPrototypeCall(
 -controller[kState].sizeAlgorithm,
 +sizeAlgorithm,
 undefined,
 chunk);
 }catch(error){