diff --git a/src/util/http_request.spec.ts b/src/util/http_request.spec.ts
new file mode 100644
index 000000000..b4c0a2b2e
--- /dev/null
+++ b/src/util/http_request.spec.ts
@@ -0,0 +1,57 @@
+/**
+ * @license
+ * Copyright 2016 Google Inc.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { describe, it, expect } from "vitest";
+
+import { parseUrl } from "#src/util/http_request.ts";
+
+describe("parseUrl", () => {
+  it("parses http correctly", () => {
+    expect(parseUrl("http://example.foo/bar")).toEqual({
+      protcol: "http",
+      host: "example.foo",
+      path: "/bar",
+    });
+  });
+  it("parses http with port correctly", () => {
+    expect(parseUrl("http://example.foo:8080/bar")).toEqual({
+      protcol: "http",
+      host: "example.foo:8080",
+      path: "/bar",
+    });
+  });
+  it("parses https correctly", () => {
+    expect(parseUrl("https://example.foo/bar")).toEqual({
+      protcol: "https",
+      host: "example.foo",
+      path: "/bar",
+    });
+  });
+  it("parses blob correctly", () => {
+    expect(parseUrl("blob:http://example.foo/bar")).toEqual({
+      protcol: "http",
+      host: "example.foo",
+      path: "/bar",
+    });
+  });
+  it("parses blob with port correctly", () => {
+    expect(parseUrl("blob:http://example.foo:8080/bar")).toEqual({
+      protcol: "http",
+      host: "example.foo:8080",
+      path: "/bar",
+    });
+  });
+});
diff --git a/src/util/http_request.ts b/src/util/http_request.ts
index dbfef9c38..a12473251 100644
--- a/src/util/http_request.ts
+++ b/src/util/http_request.ts
@@ -195,12 +195,12 @@ export function parseUrl(url: string): {
   host: string;
   path: string;
 } {
-  const urlProtocolPattern = /^([^:/]+):\/\/([^/]+)((?:\/.*)?)$/;
+  const urlProtocolPattern = /^(blob:)?([^:/]+):\/\/([^/]+)((?:\/.*)?)$/;
   const match = url.match(urlProtocolPattern);
   if (match === null) {
     throw new Error(`Invalid URL: ${JSON.stringify(url)}`);
   }
-  return { protocol: match[1], host: match[2], path: match[3] };
+  return { protocol: match[2], host: match[3], path: match[4] };
 }
 
 export function isNotFoundError(e: any) {