fix: VLLM supplier recalculates token function (#2375)

apps/setting/models_provider/impl/vllm_model_provider/model/image.py

@@ -1,5 +1,8 @@
-from typing import Dict
+from typing import Dict, List
 
+from langchain_core.messages import get_buffer_string, BaseMessage
+
+from common.config.tokenizer_manage_config import TokenizerManage
 from setting.models_provider.base_model_provider import MaxKBBaseModel
 from setting.models_provider.impl.base_chat_open_ai import BaseChatOpenAI
 
@@ -21,3 +24,15 @@ class VllmImage(MaxKBBaseModel, BaseChatOpenAI):
 
     def is_cache_model(self):
         return False
+
+    def get_num_tokens_from_messages(self, messages: List[BaseMessage]) -> int:
+        if self.usage_metadata is None or self.usage_metadata == {}:
+            tokenizer = TokenizerManage.get_tokenizer()
+            return sum([len(tokenizer.encode(get_buffer_string([m]))) for m in messages])
+        return self.usage_metadata.get('input_tokens', 0)
+
+    def get_num_tokens(self, text: str) -> int:
+        if self.usage_metadata is None or self.usage_metadata == {}:
+            tokenizer = TokenizerManage.get_tokenizer()
+            return len(tokenizer.encode(text))
+        return self.get_last_generation_info().get('output_tokens', 0)

apps/setting/models_provider/impl/vllm_model_provider/model/llm.py

@@ -1,8 +1,11 @@
 # coding=utf-8
 
-from typing import Dict
+from typing import Dict, List
 from urllib.parse import urlparse, ParseResult
 
+from langchain_core.messages import BaseMessage, get_buffer_string
+
+from common.config.tokenizer_manage_config import TokenizerManage
 from setting.models_provider.base_model_provider import MaxKBBaseModel
 from setting.models_provider.impl.base_chat_open_ai import BaseChatOpenAI
 
@@ -33,3 +36,15 @@ class VllmChatModel(MaxKBBaseModel, BaseChatOpenAI):
             stream_usage=True,
         )
         return vllm_chat_open_ai
+
+    def get_num_tokens_from_messages(self, messages: List[BaseMessage]) -> int:
+        if self.usage_metadata is None or self.usage_metadata == {}:
+            tokenizer = TokenizerManage.get_tokenizer()
+            return sum([len(tokenizer.encode(get_buffer_string([m]))) for m in messages])
+        return self.usage_metadata.get('input_tokens', 0)
+
+    def get_num_tokens(self, text: str) -> int:
+        if self.usage_metadata is None or self.usage_metadata == {}:
+            tokenizer = TokenizerManage.get_tokenizer()
+            return len(tokenizer.encode(text))
+        return self.get_last_generation_info().get('output_tokens', 0)