add：添加在上载时不能取消任务和重新上载列表限制，添加已经在Down时不能继续Down的限制。

client/client.cpp

@@ -130,6 +130,17 @@ bool CClient::down_task(const std::string& param)
 
 bool CClient::up_task(const std::string& cmd)
 {
+
+    {
+        std::lock_guard<std::mutex> lock(mutex_);
+        for (const auto& item : up_) {
+            if (item.second->trans_state_ == TRANS_REDAY || item.second->trans_state_ == TRANS_ING) {
+                logger_->warn("Have Task Upping, Please wait!");
+                return false;
+            }
+        }
+    }
+
     auto list = CFileOpr::get_file_list(cmd);
     std::string msg;
     for (const auto& item : list) {
@@ -164,6 +175,15 @@ bool CClient::up_task(const std::string& cmd)
 
 bool CClient::cancel_task()
 {
+    {
+        std::lock_guard<std::mutex> lock(mutex_);
+        for (const auto& item : up_) {
+            if (item.second->trans_state_ == TRANS_REDAY || item.second->trans_state_ == TRANS_ING) {
+                logger_->warn("Have Task Upping, Please wait!");
+                return false;
+            }
+        }
+    }
     std::shared_ptr<CFrameBuffer> buf = std::make_shared<CFrameBuffer>();
     buf->type_ = TYPE_CANCEL_LIST;
     return send_frame(buf.get());
@@ -403,7 +423,7 @@ void CClient::send_file_data_th(const char* keys)
             logger_->error("Stop Trans {} To {} failed.", t->cur_file_, str_key);
             return;
         }
-        //std::this_thread::sleep_for(std::chrono::milliseconds(10));
+        // std::this_thread::sleep_for(std::chrono::milliseconds(10));
     }
 
     buf->type_ = TYPE_TRANS_DONE;