(Feature) Vercel AI SDK (#2024)

vercel-ai-sdk/src/stream-utils.ts

@@ -0,0 +1,28 @@
+async function filterStream(originalStream: ReadableStream) {
+    const reader = originalStream.getReader();
+    const filteredStream = new ReadableStream({
+        async start(controller) {
+            while (true) {
+                const { done, value } = await reader.read();
+                if (done) {
+                    controller.close();
+                    break;
+                }
+                try {
+                    const chunk = JSON.parse(value); 
+                    if (chunk.type !== "step-finish") {
+                        controller.enqueue(value);
+                    }
+                } catch (error) {
+                    if (!(value.type==='step-finish')) {
+                        controller.enqueue(value);
+                    }
+                }
+            }
+        }
+    });
+
+    return filteredStream;
+}
+
+export { filterStream };