fix: 修复循环查询的bug

deepsearcher/backend/templates/index.html

@@ -449,9 +449,15 @@
         // 工具函数：关闭EventSource连接
         function closeEventSource() {
             if (eventSource) {
+                console.log('Closing eventSource in closeEventSource function');
                 eventSource.close();
                 eventSource = null;
             }
+            if (window.currentEventSource) {
+                console.log('Closing currentEventSource in closeEventSource function');
+                window.currentEventSource.close();
+                window.currentEventSource = null;
+            }
             isStreaming = false;
         }
 
@@ -472,15 +478,17 @@
                         showStatus('queryStatus', '查询已开始，正在处理...', 'loading');
                         break;
                     case 'complete':
-                        console.log('Query completed');
+                        console.log('Query completed - closing connection');
                         showStatus('queryStatus', '查询完成', 'success');
                         // 关闭EventSource连接
                         if (window.currentEventSource) {
+                            console.log('Closing currentEventSource');
                             window.currentEventSource.close();
                             window.currentEventSource = null;
                         }
                         isStreaming = false;
                         setButtonLoading(document.getElementById('queryBtn'), false);
+                        console.log('Query completed - connection closed, isStreaming set to false');
                         break;
                     case 'query_error':
                         console.error('Query error:', message.error);
@@ -680,6 +688,7 @@
             }
             
             if (isStreaming) {
+                console.log('Query already in progress, isStreaming:', isStreaming);
                 showStatus('queryStatus', '查询正在进行中，请等待完成', 'error');
                 return;
             }
@@ -693,8 +702,16 @@
             container.innerHTML = '';
             
             try {
+                console.log('Starting new query, setting isStreaming to true');
                 isStreaming = true;
                 
+                // 确保没有其他连接存在
+                if (window.currentEventSource) {
+                    console.log('Closing existing EventSource connection');
+                    window.currentEventSource.close();
+                    window.currentEventSource = null;
+                }
+                
                 // 使用EventSource直接连接到查询流
                 const eventSource = new EventSource(`/query-stream/?original_query=${encodeURIComponent(queryText)}&max_iter=${maxIter}`);
                 
@@ -714,7 +731,7 @@
                 eventSource.onerror = function(event) {
                     console.error('EventSource error:', event);
                     if (eventSource.readyState === EventSource.CLOSED) {
-                        console.log('EventSource connection closed');
+                        console.log('EventSource connection closed due to error');
                         isStreaming = false;
                         setButtonLoading(button, false);
                         window.currentEventSource = null;

main.py

@@ -291,12 +291,12 @@ async def perform_query_stream(
             # 在后台线程中执行查询
             def run_query():
                 try:
+                    print(f"Starting query: {original_query} with max_iter: {max_iter}")
                     result_text, _ = query(original_query, max_iter)
-                    # 查询完成后发送complete消息
-                    from deepsearcher.utils.message_stream import send_complete
-                    send_complete()
+                    print(f"Query completed with result length: {len(result_text) if result_text else 0}")
                     return result_text, None
                 except Exception as e:
+                    print(f"Query failed with error: {e}")
                     return None, str(e)
             
             # 使用线程池执行查询
@@ -311,9 +311,13 @@ async def perform_query_stream(
                         if query_future.done():
                             result_text, error = query_future.result()
                             if error:
+                                print(f"Query error: {error}")
                                 yield f"data: {json.dumps({'type': 'query_error', 'error': error}, ensure_ascii=False)}\n\n"
                                 return
-                            # 成功完成时，complete消息会通过消息流自动发送
+                            # 成功完成时，发送complete消息并结束
+                            print("Query completed successfully, sending complete message")
+                            yield f"data: {json.dumps({'type': 'complete'}, ensure_ascii=False)}\n\n"
+                            print("Complete message sent, ending stream")
                             return
                         
                         # 尝试从队列获取消息，设置超时