Update app.py

app.py

@@ -181,9 +181,7 @@ def normalize_model(model: str):
 
 def create_client():
 
-    return Client(
-        provider=g4f.Provider.Blackbox
-    )
+    return Client()
 
 
 # =====================================================
@@ -548,6 +546,19 @@ async def anthropic_messages(
                 + "\n\n"
             )
 
+            # =========================================
+            # ping
+            # =========================================
+
+            yield (
+                "event: ping\n"
+                "data: "
+                + json.dumps({
+                    "type": "ping"
+                })
+                + "\n\n"
+            )
+
             # =========================================
             # content_block_start
             # =========================================
@@ -566,6 +577,8 @@ async def anthropic_messages(
                 + "\n\n"
             )
 
+            has_content = False
+
             for chunk in response:
 
                 try:
@@ -589,6 +602,8 @@ async def anthropic_messages(
                     if not content:
                         continue
 
+                    has_content = True
+
                     payload = {
                         "type": "content_block_delta",
                         "index": 0,
@@ -614,6 +629,23 @@ async def anthropic_messages(
                         f"Anthropic chunk error: {e}"
                     )
 
+            if not has_content:
+
+                yield (
+                    "event: error\n"
+                    "data: "
+                    + json.dumps({
+                        "type": "error",
+                        "error": {
+                            "type": "api_error",
+                            "message": "Empty response"
+                        }
+                    })
+                    + "\n\n"
+                )
+
+                return
+
             # =========================================
             # content_block_stop
             # =========================================