fix: 优化思考内容提取，支持多种思考标记格式

services/llm_service.py

@@ -128,6 +128,8 @@ class LLMService:
         # 处理思考功能
         if enable_thinking and agent_config.get('enable_thinking', True):
             thinking_prompt = agent_config.get('thinking_prompt')
+            thinking_prefix = agent_config.get('thinking_prefix', '')
+            thinking_suffix = agent_config.get('thinking_suffix', '')
             
             if supports_thinking and thinking_model:
                 # 使用专门的思考模型
@@ -139,22 +141,15 @@ class LLMService:
                     thinking_result = await self._call_api(
                         api_base, api_key, thinking_model, thinking_messages,
                         max_tokens=min(max_tokens, 1000),
-                        temperature=0.3  # 思考时降低温度
+                        temperature=0.3
                     )
                     thinking_content = thinking_result
                 except Exception as e:
                     logger.warning(f"思考模型调用失败: {e}")
             
-            elif supports_thinking:
-                # Provider支持思考但无单独模型，尝试在回复中获取思考部分
-                pass  # 在回复解析时处理
-            
             elif thinking_prompt:
-                # Provider不支持思考，但Agent配置了思考提示词
-                # 将思考提示词添加到系统提示
-                enhanced_system = f"{system_prompt}\n\n在回答之前，请先思考问题。思考过程请用{agent_config.get('thinking_prefix', '')}和{agent_config.get('thinking_suffix', '')}包裹，然后再给出正式回答。"
-                if thinking_prompt:
-                    enhanced_system += f"\n思考指导：{thinking_prompt}"
+                # Agent配置了思考提示词，添加到系统提示中
+                enhanced_system = f"{system_prompt}\n\n{thinking_prompt}"
                 final_messages[0] = {"role": "system", "content": enhanced_system}
         
         # 调用主模型
@@ -165,19 +160,37 @@ class LLMService:
                 temperature=temperature
             )
             
-            # 尝试从回复中提取思考内容
-            if enable_thinking and not supports_thinking:
+            # 尝试从回复中提取思考内容（支持DeepSeek R1、GLM等模型的思考模式）
+            if enable_thinking and agent_config.get('enable_thinking', True):
                 thinking_prefix = agent_config.get('thinking_prefix', '')
                 thinking_suffix = agent_config.get('thinking_suffix', '')
                 
-                if thinking_prefix and thinking_suffix:
+                # 如果没有配置前缀后缀，使用常见的思考标记
+                if not thinking_prefix:
+                    # 尝试常见的思考标记
+                    common_thinking_markers = [
+                        ('<think>', '</think>'),
+                        ('【思考】', '【回答】'),
+                        ('Thought:', 'Answer:'),
+                        ('思考：', '回答：'),
+                    ]
+                    for prefix, suffix in common_thinking_markers:
+                        if prefix in response and suffix in response:
+                            thinking_prefix = prefix
+                            thinking_suffix = suffix
+                            break
+                
                 # 提取思考部分
-                    pattern = f"{re.escape(thinking_prefix)}(.*?)?{re.escape(thinking_suffix)}"
-                    match = re.search(pattern, response, re.DOTALL)
-                    if match:
-                        thinking_content = match.group(1).strip()
+                if thinking_prefix and thinking_suffix and thinking_prefix in response:
+                    try:
+                        start_idx = response.find(thinking_prefix)
+                        end_idx = response.find(thinking_suffix, start_idx)
+                        if end_idx > start_idx:
+                            thinking_content = response[start_idx + len(thinking_prefix):end_idx].strip()
                             # 移除思考部分，只保留回复
-                        response = re.sub(pattern, '', response, flags=re.DOTALL).strip()
+                            response = response[end_idx + len(thinking_suffix):].strip()
+                    except Exception as e:
+                        logger.warning(f"提取思考内容失败: {e}")
             
             return response, thinking_content