diff --git a/src/routes/openaiGeminiRoutes.js b/src/routes/openaiGeminiRoutes.js
index 7a48975c..7599b98c 100644
--- a/src/routes/openaiGeminiRoutes.js
+++ b/src/routes/openaiGeminiRoutes.js
@@ -27,6 +27,7 @@ function checkPermissions(apiKeyData, requiredPermission = 'gemini') {
 router.post('/v1/chat/completions', authenticateApiKey, async (req, res) => {
   const startTime = Date.now();
   let abortController = null;
+  let account = null; // Declare account outside try block for error handling
   
   try {
     const apiKeyData = req.apiKey;
@@ -41,16 +42,42 @@ router.post('/v1/chat/completions', authenticateApiKey, async (req, res) => {
         }
       });
     }
+    // 处理请求体结构 - 支持多种格式
+    let requestBody = req.body;
+    
+    // 如果请求体被包装在 body 字段中，解包它
+    if (req.body.body && typeof req.body.body === 'object') {
+      requestBody = req.body.body;
+    }
+    
+    // 从 URL 路径中提取模型信息（如果存在）
+    let urlModel = null;
+    const urlPath = req.body?.config?.url || req.originalUrl || req.url;
+    const modelMatch = urlPath.match(/\/([^\/]+):(?:stream)?[Gg]enerateContent/);
+    if (modelMatch) {
+      urlModel = modelMatch[1];
+      logger.debug(`Extracted model from URL: ${urlModel}`);
+    }
     
     // 提取请求参数
     const {
-      messages,
-      model = 'gemini-2.0-flash-exp',
+      messages: requestMessages,
+      contents,
+      model: bodyModel = 'gemini-2.0-flash-exp',
       temperature = 0.7,
       max_tokens = 4096,
       stream = false
-    } = req.body;
-    
+    } = requestBody;
+
+    // 优先使用 URL 中的模型，其次是请求体中的模型
+    const model = urlModel || bodyModel;
+
+    // 支持两种格式: OpenAI 的 messages 或 Gemini 的 contents
+    let messages = requestMessages;
+    if (contents && Array.isArray(contents)) {
+      messages = contents;
+    }
+
     // 验证必需参数
     if (!messages || !Array.isArray(messages) || messages.length === 0) {
       return res.status(400).json({
@@ -79,7 +106,7 @@ router.post('/v1/chat/completions', authenticateApiKey, async (req, res) => {
     const sessionHash = generateSessionHash(req);
     
     // 选择可用的 Gemini 账户
-    const account = await geminiAccountService.selectAvailableAccount(
+    account = await geminiAccountService.selectAvailableAccount(
       apiKeyData.id,
       sessionHash
     );
@@ -153,8 +180,8 @@ router.post('/v1/chat/completions', authenticateApiKey, async (req, res) => {
     
     // 处理速率限制
     if (error.status === 429) {
-      if (req.apiKey && req.account) {
-        await geminiAccountService.setAccountRateLimited(req.account.id, true);
+      if (req.apiKey && account) {
+        await geminiAccountService.setAccountRateLimited(account.id, true);
       }
     }
     
diff --git a/src/utils/logger.js b/src/utils/logger.js
index e905e90a..87765dad 100644
--- a/src/utils/logger.js
+++ b/src/utils/logger.js
@@ -5,6 +5,49 @@ const path = require('path');
 const fs = require('fs');
 const os = require('os');
 
+// 安全的 JSON 序列化函数，处理循环引用
+const safeStringify = (obj, maxDepth = 3) => {
+  const seen = new WeakSet();
+  
+  const replacer = (key, value, depth = 0) => {
+    if (depth > maxDepth) return '[Max Depth Reached]';
+    
+    if (value !== null && typeof value === 'object') {
+      if (seen.has(value)) {
+        return '[Circular Reference]';
+      }
+      seen.add(value);
+      
+      // 过滤掉常见的循环引用对象
+      if (value.constructor) {
+        const constructorName = value.constructor.name;
+        if (['Socket', 'TLSSocket', 'HTTPParser', 'IncomingMessage', 'ServerResponse'].includes(constructorName)) {
+          return `[${constructorName} Object]`;
+        }
+      }
+      
+      // 递归处理对象属性
+      if (Array.isArray(value)) {
+        return value.map((item, index) => replacer(index, item, depth + 1));
+      } else {
+        const result = {};
+        for (const [k, v] of Object.entries(value)) {
+          result[k] = replacer(k, v, depth + 1);
+        }
+        return result;
+      }
+    }
+    
+    return value;
+  };
+  
+  try {
+    return JSON.stringify(replacer('', obj));
+  } catch (error) {
+    return JSON.stringify({ error: 'Failed to serialize object', message: error.message });
+  }
+};
+
 // 📝 增强的日志格式
 const createLogFormat = (colorize = false) => {
   const formats = [
@@ -31,7 +74,7 @@ const createLogFormat = (colorize = false) => {
       
       // 添加元数据
       if (metadata && Object.keys(metadata).length > 0) {
-        logMessage += ` | ${JSON.stringify(metadata)}`;
+        logMessage += ` | ${safeStringify(metadata)}`;
       }
       
       // 添加其他属性
@@ -42,7 +85,7 @@ const createLogFormat = (colorize = false) => {
       delete additionalData.stack;
       
       if (Object.keys(additionalData).length > 0) {
-        logMessage += ` | ${JSON.stringify(additionalData)}`;
+        logMessage += ` | ${safeStringify(additionalData)}`;
       }
       
       return stack ? `${logMessage}\n${stack}` : logMessage;