Add rate limit error messages

g4f/Provider/FreeGpt.py

@@ -41,7 +41,10 @@ class FreeGpt(AsyncGeneratorProvider):
             async with session.post(f"{url}/api/generate", json=data) as response:
                 response.raise_for_status()
                 async for chunk in response.iter_content():
-                    yield chunk.decode()
+                    chunk = chunk.decode()
+                    if chunk == "当前地区当日额度已消耗完":
+                        raise RuntimeError("Rate limit reached")
+                    yield chunk
 
     @classmethod
     @property

g4f/Provider/NoowAi.py

@@ -61,6 +61,8 @@ class NoowAi(AsyncGeneratorProvider):
                             yield line["data"]
                         elif line["type"] == "end":
                             break
+                        elif line["type"] == "error":
+                            raise RuntimeError(line["data"])
                 
 def random_string(length: int = 10):
     return ''.join(random.choice(string.ascii_lowercase + string.digits) for _ in range(length))