wininet: Reset data stream for existing request connections.

dlls/wininet/http.c

@@ -4936,11 +4936,18 @@ static DWORD HTTP_HttpSendRequestW(http_request_t *request, LPCWSTR lpszHeaders,
 
         loop_next = FALSE;
 
-        if (request->netconn && !NETCON_is_alive(request->netconn))
+        if (request->netconn)
+        {
+            if (!NETCON_is_alive(request->netconn))
             {
                 free_netconn(request->netconn);
                 request->netconn = NULL;
             }
+            else
+            {
+                reset_data_stream(request);
+            }
+        }
         reusing_connection = request->netconn != NULL;
 
         if(redirected) {

dlls/wininet/tests/http.c

@@ -3019,7 +3019,7 @@ static void test_successive_HttpSendRequest(int port)
     CLEAR_NOTIFIED(INTERNET_STATUS_CONNECTION_CLOSED);
     CHECK_NOTIFIED(INTERNET_STATUS_REQUEST_COMPLETE);
 
-    test_status_code_todo(req, 200);
+    test_status_code(req, 200);
 
     SET_WINE_ALLOW(INTERNET_STATUS_CLOSING_CONNECTION);
     SET_WINE_ALLOW(INTERNET_STATUS_CONNECTION_CLOSED);