Merge remote-tracking branch 'upstream/master' into master

README.md

@@ -32,6 +32,8 @@
 
 
 ## 功能清单
+### 功能一览
+<img width="800" alt="图片" src="https://user-images.githubusercontent.com/11495632/93857284-f15b5f00-fcec-11ea-894d-83eb656dc235.png">
 
 - RTSP[S]
   - RTSP[S] 服务器，支持RTMP/MP4/HLS转RTSP[S],支持亚马逊echo show这样的设备

server/WebApi.cpp

@@ -1076,50 +1076,60 @@ void installWebApi() {
         CHECK_ARGS("url", "timeout_sec", "expire_sec");
         GET_CONFIG(string, snap_root, API::kSnapRoot);
 
+        bool have_old_snap = false, res_old_snap = false;
         int expire_sec = allArgs["expire_sec"];
         auto scan_path = File::absolutePath(MD5(allArgs["url"]).hexdigest(), snap_root) + "/";
-        string snap_path;
+        string new_snap = StrPrinter << scan_path << time(NULL) << ".jpeg";
+
         File::scanDir(scan_path, [&](const string &path, bool isDir) {
-            if (isDir) {
-                //忽略文件夹
+            if (isDir || !end_with(path, ".jpeg")) {
+                //忽略文件夹或其他类型的文件
                 return true;
             }
 
             //找到截图
             auto tm = FindField(path.data() + scan_path.size(), nullptr, ".jpeg");
             if (atoll(tm.data()) + expire_sec < time(NULL)) {
-                //截图已经过期,删除之，后面重新生成
-                File::delete_file(path.data());
+                //截图已经过期，改名，以便再次请求时，可以返回老截图
+                rename(path.data(), new_snap.data());
+                have_old_snap = true;
                 return true;
             }
 
-            //截图未过期,中断遍历，返回上次生成的截图
-            snap_path = path;
+            //截图存在，且未过期，那么返回之
+            res_old_snap = true;
+            responseSnap(path, headerIn, invoker);
+            //中断遍历
             return false;
         });
 
-        if(!snap_path.empty()){
-            responseSnap(snap_path, headerIn, invoker);
+        if (res_old_snap) {
+            //已经回复了旧的截图
             return;
         }
 
         //无截图或者截图已经过期
-        snap_path = StrPrinter << scan_path << time(NULL) << ".jpeg";
-
-        //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
-        auto file = File::create_file(snap_path.data(), "wb");
-        if (file) {
-            fclose(file);
+        if (!have_old_snap) {
+            //无过期截图，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多次启动FFmpeg进程
+            auto file = File::create_file(new_snap.data(), "wb");
+            if (file) {
+                fclose(file);
+            }
         }
 
-        //启动FFmpeg进程，开始截图
-        FFmpegSnap::makeSnap(allArgs["url"],snap_path,allArgs["timeout_sec"],[invoker,headerIn,snap_path](bool success){
-            if(!success){
+        //启动FFmpeg进程，开始截图，生成临时文件，截图成功后替换为正式文件
+        auto new_snap_tmp = new_snap + ".tmp";
+        FFmpegSnap::makeSnap(allArgs["url"], new_snap_tmp, allArgs["timeout_sec"], [invoker, headerIn, new_snap, new_snap_tmp](bool success) {
+            if (!success) {
                 //生成截图失败，可能残留空文件
-                File::delete_file(snap_path.data());
+                File::delete_file(new_snap_tmp.data());
+            } else {
+                //临时文件改成正式文件
+                File::delete_file(new_snap.data());
+                rename(new_snap_tmp.data(), new_snap.data());
             }
-            responseSnap(snap_path, headerIn, invoker);
+            responseSnap(new_snap, headerIn, invoker);
         });
     });
 

src/Http/HttpFileManager.cpp

@@ -298,12 +298,6 @@ static bool makeFolderMenu(const string &httpPath, const string &strFullPath, st
     return true;
 }
 
-//字符串是否以xx结尾
-static bool end_of(const string &str, const string &substr){
-    auto pos = str.rfind(substr);
-    return pos != string::npos && pos == str.size() - substr.size();
-};
-
 //拦截hls的播放请求
 static bool emitHlsPlayed(const Parser &parser, const MediaInfo &mediaInfo, const HttpSession::HttpAccessPathInvoker &invoker,TcpSession &sender){
     //访问的hls.m3u8结尾，我们转换成kBroadcastMediaPlayed事件
@@ -488,7 +482,7 @@ static string pathCat(const string &a, const string &b){
  * @param cb 回调对象
  */
 static void accessFile(TcpSession &sender, const Parser &parser, const MediaInfo &mediaInfo, const string &strFile, const HttpFileManager::invoker &cb) {
-    bool is_hls = end_of(strFile, kHlsSuffix);
+    bool is_hls = end_with(strFile, kHlsSuffix);
     bool file_exist = File::is_file(strFile.data());
     if (!is_hls && !file_exist) {
         //文件不存在且不是hls,那么直接返回404

src/Player/PlayerBase.cpp

@@ -17,12 +17,6 @@ using namespace toolkit;
 
 namespace mediakit {
 
-//字符串是否以xx结尾
-static bool end_of(const string &str, const string &substr){
-    auto pos = str.rfind(substr);
-    return pos != string::npos && pos == str.size() - substr.size();
-}
-
 PlayerBase::Ptr PlayerBase::createPlayer(const EventPoller::Ptr &poller,const string &url_in) {
     static auto releasePlayer = [](PlayerBase *ptr){
         onceToken token(nullptr,[&](){
@@ -54,7 +48,7 @@ PlayerBase::Ptr PlayerBase::createPlayer(const EventPoller::Ptr &poller,const st
         return PlayerBase::Ptr(new RtmpPlayerImp(poller),releasePlayer);
     }
 
-    if ((strcasecmp("http",prefix.data()) == 0 || strcasecmp("https",prefix.data()) == 0) && end_of(url, ".m3u8")) {
+    if ((strcasecmp("http",prefix.data()) == 0 || strcasecmp("https",prefix.data()) == 0) && end_with(url, ".m3u8")) {
         return PlayerBase::Ptr(new HlsPlayerImp(poller),releasePlayer);
     }
 

src/Rtsp/RtspSession.cpp

@@ -126,12 +126,6 @@ void RtspSession::onRecv(const Buffer::Ptr &buf) {
     }
 }
 
-//字符串是否以xx结尾
-static inline bool end_of(const string &str, const string &substr){
-    auto pos = str.rfind(substr);
-    return pos != string::npos && pos == str.size() - substr.size();
-}
-
 void RtspSession::onWholeRtspPacket(Parser &parser) {
     string method = parser.Method(); //提取出请求命令字
     _cseq = atoi(parser["CSeq"].data());
@@ -224,7 +218,7 @@ void RtspSession::handleReq_ANNOUNCE(const Parser &parser) {
     }
 
     auto full_url = parser.FullUrl();
-    if(end_of(full_url,".sdp")){
+    if(end_with(full_url,".sdp")){
         //去除.sdp后缀，防止EasyDarwin推流器强制添加.sdp后缀
         full_url = full_url.substr(0,full_url.length() - 4);
         _media_info.parse(full_url);