fix(ext/fetch): blob url (#16057)

Co-authored-by: Luca Casonato <hello@lcas.dev>

2 files changed, 21 insertions, 1 deletions

diff --git a/cli/tests/unit/fetch_test.ts b/cli/tests/unit/fetch_test.ts
index 5375457bc..7a531392d 100644
--- a/cli/tests/unit/fetch_test.ts
+++ b/cli/tests/unit/fetch_test.ts
@@ -1773,3 +1773,20 @@ Deno.test(
     listener.close();
   },
 );
+
+Deno.test(
+  { permissions: { net: true } },
+  async function fetchBlobUrl(): Promise<
+    void
+  > {
+    const blob = new Blob(["ok"], { type: "text/plain" });
+    const url = URL.createObjectURL(blob);
+    const res = await fetch(url);
+    console.log(res);
+    assert(res.url.startsWith("blob:http://js-unit-tests/"));
+    assertEquals(res.status, 200);
+    assertEquals(res.headers.get("content-length"), "2");
+    assertEquals(res.headers.get("content-type"), "text/plain");
+    assertEquals(await res.text(), "ok");
+  },
+);
diff --git a/ext/fetch/26_fetch.js b/ext/fetch/26_fetch.js
index 13c34f534..3e90429ce 100644
--- a/ext/fetch/26_fetch.js
+++ b/ext/fetch/26_fetch.js
@@ -165,6 +165,7 @@
 
       const body = new InnerBody(req.blobUrlEntry.stream());
       terminator[abortSignal.add](() => body.error(terminator.reason));
+      processUrlList(req.urlList, req.urlListProcessed);
 
       return {
         headerList: [
@@ -179,7 +180,9 @@
           if (this.urlList.length == 0) return null;
           return this.urlList[this.urlList.length - 1];
         },
-        urlList: recursive ? [] : [...new SafeArrayIterator(req.urlList)],
+        urlList: recursive
+          ? []
+          : [...new SafeArrayIterator(req.urlListProcessed)],
       };
     }