[feat] 支持基于tiktoken的token字符统计

main.py

@@ -173,9 +173,9 @@ CORS(app, resources={r"/images/*": {"origins": "*"}})
 PANDORA_UPLOAD_URL = 'files.pandoranext.com'
 
 
-VERSION = '0.3.2'
+VERSION = '0.3.3'
 # VERSION = 'test'
-UPDATE_INFO = '支持bot模式非markdown图片输出'
+UPDATE_INFO = '支持基于tiktoken的token字符统计'
 # UPDATE_INFO = '【仅供临时测试使用】 '
 
 with app.app_context():
@@ -1127,6 +1127,40 @@ def keep_alive(last_data_time, stop_event, queue, model,  chat_message_id):
             last_data_time[0] = time.time()
         time.sleep(1)
 
+
+import tiktoken
+
+def count_tokens(text, model_name):
+    """
+    Count the number of tokens for a given text using a specified model.
+
+    :param text: The text to be tokenized.
+    :param model_name: The name of the model to use for tokenization.
+    :return: Number of tokens in the text for the specified model.
+    """
+    # 获取指定模型的编码器
+    if model_name == 'gpt-3.5-turbo':
+        model_name = 'gpt-3.5-turbo'
+    else:
+        model_name = 'gpt-4'
+    encoder = tiktoken.encoding_for_model(model_name)
+
+    # 编码文本并计算token数量
+    token_list = encoder.encode(text)
+    return len(token_list)
+
+def count_total_input_words(messages, model):
+    """
+    Count the total number of words in all messages' content.
+    """
+    total_words = 0
+    for message in messages:
+        content = message.get("content", "")
+        # logger.info(f"message: {content}")
+        total_words += count_tokens(content, model)
+
+    return total_words
+
 import threading
 import time
 # 定义 Flask 路由
@@ -1212,6 +1246,12 @@ def chat_completions():
         for _ in generate():
             pass
         # 构造响应的 JSON 结构
+        ori_model_name = ''
+        model_config = find_model_config(model)
+        if model_config:
+            ori_model_name = model_config.get('ori_name', model)
+        input_tokens = count_total_input_words(messages, ori_model_name)
+        comp_tokens = count_tokens(all_new_text, ori_model_name)
         response_json = {
             "id": generate_unique_id("chatcmpl"),
             "object": "chat.completion",
@@ -1229,9 +1269,9 @@ def chat_completions():
             ],
             "usage": {
                 # 这里的 token 计数需要根据实际情况计算
-                "prompt_tokens": 0,
-                "completion_tokens": 0,
-                "total_tokens": 0
+                "prompt_tokens": input_tokens,
+                "completion_tokens": comp_tokens,
+                "total_tokens": input_tokens + comp_tokens
             },
             "system_fingerprint": None
         }