#3505 - json response condition update (#3624)

vicky1999 · bluwy · Rich-Harris · web-flow · commit 59e44397089c · 2022-01-29T16:38:06.000-05:00
* #3505 - json response condition update * Update packages/kit/src/runtime/server/endpoint.js Co-authored-by: Bjorn Lu <bjornlu.dev@gmail.com> * changeset added * Update light-pumas-heal.md Co-authored-by: Bjorn Lu <bjornlu.dev@gmail.com> Co-authored-by: Rich Harris <hello@rich-harris.dev>
diff --git a/.changeset/light-pumas-heal.md b/.changeset/light-pumas-heal.md
@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+Handle non-compliant ReadableStream implementations
diff --git a/packages/kit/src/runtime/server/endpoint.js b/packages/kit/src/runtime/server/endpoint.js
@@ -116,7 +116,7 @@ function is_pojo(body) {
 		if (body._readableState && body._writableState && body._events) return false;
 
 		// similarly, it could be a web ReadableStream
-		if (body[Symbol.toStringTag] === 'ReadableStream') return false;
+		if (typeof ReadableStream !== 'undefined' && body instanceof ReadableStream) return false;
 	}
 
 	return true;

-Original file line number
+Diff line change
@@ @@ -0,0 +1,5 @@ @@
 +---
 +'@sveltejs/kit': patch
 +---
++
 +Handle non-compliant ReadableStream implementations
Original file line number	Diff line number	Diff line change
`@@ -116,7 +116,7 @@ function is_pojo(body) {`
`116`	`116`	`if (body._readableState && body._writableState && body._events) return false;`
`117`	`117`
`118`	`118`	`// similarly, it could be a web ReadableStream`
`119`		`- if (body[Symbol.toStringTag] === 'ReadableStream') return false;`
	`119`	`+ if (typeof ReadableStream !== 'undefined' && body instanceof ReadableStream) return false;`
`120`	`120`	`}`
`121`	`121`
`122`	`122`	`return true;`