From abe1698601c8d19c1a9fbceccf45c339313173c2 Mon Sep 17 00:00:00 2001
From: xiongziliang <771730766@qq.com>
Date: Sat, 9 May 2020 09:39:36 +0800
Subject: [PATCH] =?UTF-8?q?=E9=98=B2=E6=AD=A2=E9=87=8D=E5=A4=8D=E5=88=9B?=
 =?UTF-8?q?=E5=BB=BA=E6=88=AA=E5=9B=BE?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 server/WebApi.cpp | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/server/WebApi.cpp b/server/WebApi.cpp
index 183b9ca0..e4b18a6b 100644
--- a/server/WebApi.cpp
+++ b/server/WebApi.cpp
@@ -858,12 +858,17 @@ void installWebApi() {
 
         //无截图或者截图已经过期
         snap_path = StrPrinter << scan_path << time(NULL) << ".jpeg";
-#if !defined(_WIN32)
-        //创建文件夹
-        File::create_path(snap_path.c_str(), S_IRWXO | S_IRWXG | S_IRWXU);
-#else
-        File::create_path(snap_path.c_str(),0);
-#endif
+
+        {
+            //生成一个空文件，目的是顺便创建文件夹路径，
+            //同时防止在FFmpeg生成截图途中不停的尝试调用该api启动FFmpeg生成相同的截图
+            //当然，我们可以拷贝一个"正在截图中"的图来替换这个空图，这需要开发者自己实现
+            auto file = File::create_file(snap_path.data(), "wb");
+            if(file){
+                fclose(file);
+            }
+        }
+
         FFmpegSnap::makeSnap(allArgs["url"],snap_path,allArgs["timeout_sec"],[invoker,headerIn,snap_path](bool success){
             if(!success){
                 //生成截图失败，可能残留空文件