feat: add gblob scheme support for extension (#1358)

pkg/download/testdata/extensions/gblob/index.js

@@ -0,0 +1,62 @@
+gopeed.events.onResolve(async function (ctx) {
+    if (ctx.req.url.endsWith("/blob")) {
+        const blob = new Blob(["hello world"], {type: "text/plain"});
+        const url = URL.createObjectURL(blob);
+        ctx.res = {
+            name: "gblob-blob",
+            files: [
+                {
+                    name: "hello.txt",
+                    size: 11,
+                    req: {
+                        url,
+                    }
+                }
+            ]
+        };
+        return;
+    }
+
+    const transform = new TransformStream();
+    const writer = transform.writable.getWriter();
+    const url = URL.createObjectURL(transform.writable);
+
+    if (ctx.req.url.endsWith("/stream-unknown")) {
+        (async () => {
+            await writer.write(new TextEncoder().encode("line 1\n"));
+            await new Promise((resolve) => setTimeout(resolve, 120));
+            await writer.write(new TextEncoder().encode("line 2\n"));
+            await writer.close();
+        })();
+
+        ctx.res = {
+            name: "gblob-stream-unknown",
+            files: [
+                {
+                    name: "stream-unknown.txt",
+                    req: {
+                        url,
+                    }
+                }
+            ]
+        };
+        return;
+    }
+
+    await writer.write(new TextEncoder().encode("line 1\n"));
+    await writer.write(new TextEncoder().encode("line 2\n"));
+    await writer.close();
+
+    ctx.res = {
+        name: "gblob-stream",
+        files: [
+            {
+                name: "stream.txt",
+                size: 14,
+                req: {
+                    url,
+                }
+            }
+        ]
+    };
+});