fix: implement ReadableStream fetch body handling (#8855)

1 files changed, 6 insertions, 2 deletions

diff --git a/op_crates/fetch/26_fetch.js b/op_crates/fetch/26_fetch.js
index 95ee96812..0835e12a1 100644
--- a/op_crates/fetch/26_fetch.js
+++ b/op_crates/fetch/26_fetch.js
@@ -1246,8 +1246,12 @@
             body = multipartBuilder.getBody();
             contentType = multipartBuilder.getContentType();
           } else {
-            // TODO: ReadableStream
-            throw new Error("Not implemented");
+            // TODO(lucacasonato): do this in a streaming fashion once we support it
+            const buf = new Buffer();
+            for await (const chunk of init.body) {
+              buf.write(chunk);
+            }
+            body = buf.bytes();
           }
           if (contentType && !headers.has("content-type")) {
             headers.set("content-type", contentType);