c++ - 如何为会话中的多个 put 请求重用相同的 HTTPS 连接？

Question

要将文件发送到服务器，我在 Windows 中执行 HTTPS put 请求，如下所示：

hSession = WinHttpOpen(  L"Agent/1.0",..
hConnect = WinHttpConnect(hSession,..
hRequest = WinHttpOpenRequest( hConnect, L"PUT",..
WinHttpSetCredentials(hRequest,..
WinHttpAddRequestHeaders( hRequest,..
WinHttpSendRequest( hRequest,..
WinHttpWriteData(hRequest,..
WinHttpReceiveResponse(hRequest,..
WinHttpQueryHeaders(hRequest,..
if (hRequest) WinHttpCloseHandle(hRequest);
if (hConnect) WinHttpCloseHandle(hConnect);
if (hSession) WinHttpCloseHandle(hSession);

此命令包针对应发送到服务器的每个文件运行。为要发送的每个文件从头开始建立连接会产生额外的开销。现在我正在寻找一种方法来减少这种开销。

所以我有两个问题：

• 是否有必要为每个 put 请求打开和关闭一个新的 HTTPS 连接？
• 有没有办法建立一个会话并为这个会话中的许多 put 请求重用相同的 HTTPS 连接？

Answer 1

答案如下：

1. 不会。一个连接可能会执行一堆请求。

2. 这是代码的草稿：

   hSession = WinHttpOpen( L"Agent/1.0",..
   hConnect = WinHttpConnect(hSession,.. 
   for (all_files_to_upload) { 
       hRequest = WinHttpOpenRequest( hConnect, L"PUT",..
       WinHttpSetCredentials(hRequest,.. 
       WinHttpAddRequestHeaders( hRequest,.. 
       WinHttpSendRequest( hRequest,.. 
       WinHttpWriteData(hRequest,.. 
       WinHttpReceiveResponse(hRequest,.. 
       WinHttpQueryHeaders(hRequest,.. 
       WinHttpCloseHandle(hRequest);
   } 
   
   if (hConnect) WinHttpCloseHandle(hConnect);
   if (hSession) WinHttpCloseHandle(hSession);