确保hls播放器持续播放 (#2896)

在hls注销后，hls cookie会继续存活60秒，在此期间，如果hls流重新注册，将导致无法继续播放；
通过此修改，在hls注销后每3秒查询一次MediaSource，可以在性能和功能间保持平衡。

src/Http/HttpCookieManager.cpp

@@ -61,7 +61,7 @@ bool HttpServerCookie::isExpired() {
     return _ticker.elapsedTime() > _max_elapsed * 1000;
 }
 
-void HttpServerCookie::setAttach(std::shared_ptr<void> attach) {
+void HttpServerCookie::setAttach(toolkit::Any attach) {
     _attach = std::move(attach);
 }
 
@@ -114,8 +114,7 @@ void HttpCookieManager::onManager() {
     }
 }
 
-HttpServerCookie::Ptr HttpCookieManager::addCookie(const string &cookie_name, const string &uid_in,
-                                                   uint64_t max_elapsed, std::shared_ptr<void> attach, int max_client) {
+HttpServerCookie::Ptr HttpCookieManager::addCookie(const string &cookie_name, const string &uid_in, uint64_t max_elapsed, toolkit::Any attach, int max_client) {
     lock_guard<recursive_mutex> lck(_mtx_cookie);
     auto cookie = _generator.obtain();
     auto uid = uid_in.empty() ? cookie : uid_in;

src/Http/HttpCookieManager.h

@@ -85,14 +85,14 @@ public:
     /**
      * 设置附加数据
      */
-    void setAttach(std::shared_ptr<void> attach);
+    void setAttach(toolkit::Any attach);
 
     /*
      * 获取附加数据
      */
     template <class T>
     T& getAttach() {
-        return *static_cast<T *>(_attach.get());
+        return _attach.get<T>();
     }
 
 private:
@@ -104,7 +104,7 @@ private:
     std::string _cookie_uuid;
     uint64_t _max_elapsed;
     toolkit::Ticker _ticker;
-    std::shared_ptr<void> _attach;
+    toolkit::Any _attach;
     std::weak_ptr<HttpCookieManager> _manager;
 };
 
@@ -163,7 +163,7 @@ public:
      */
     HttpServerCookie::Ptr addCookie(
         const std::string &cookie_name, const std::string &uid, uint64_t max_elapsed = COOKIE_DEFAULT_LIFE,
-        std::shared_ptr<void> attach = nullptr,
+        toolkit::Any = toolkit::Any{},
         int max_client = 1);
 
     /**

src/Http/HttpFileManager.cpp

@@ -31,6 +31,7 @@ namespace mediakit {
 // 每次访问一次该cookie，那么将重新刷新cookie有效期
 // 假如播放器在60秒内都未访问该cookie，那么将重新触发hls播放鉴权
 static int kHlsCookieSecond = 60;
+static int kFindSrcIntervalSecond = 3;
 static const string kCookieName = "ZL_COOKIE";
 static const string kHlsSuffix = "/hls.m3u8";
 static const string kHlsFMP4Suffix = "/hls.fmp4.m3u8";
@@ -38,6 +39,8 @@ static const string kHlsFMP4Suffix = "/hls.fmp4.m3u8";
 struct HttpCookieAttachment {
     // 是否已经查找到过MediaSource
     bool _find_src = false;
+    // 查找MediaSource计时
+    Ticker _find_src_ticker;
     //cookie生效作用域，本cookie只对该目录下的文件生效
     string _path;
     //上次鉴权失败信息,为空则上次鉴权成功
@@ -414,7 +417,9 @@ static void canAccessPath(Session &sender, const Parser &parser, const MediaInfo
                 // hls相关信息
                 attach->_hls_data = std::make_shared<HlsCookieData>(media_info, info);
             }
-            callback(err_msg, HttpCookieManager::Instance().addCookie(kCookieName, uid, life_second, attach));
+           toolkit::Any any;
+           any.set(std::move(attach));
+           callback(err_msg, HttpCookieManager::Instance().addCookie(kCookieName, uid, life_second, std::move(any)));
         } else {
             callback(err_msg, nullptr);
         }
@@ -532,14 +537,15 @@ static void accessFile(Session &sender, const Parser &parser, const MediaInfo &m
             return;
         }
 
-        auto src = cookie->getAttach<HttpCookieAttachment>()._hls_data->getMediaSource();
+        auto &attach = cookie->getAttach<HttpCookieAttachment>();
+        auto src = attach._hls_data->getMediaSource();
         if (src) {
             // 直接从内存获取m3u8索引文件(而不是从文件系统)
             response_file(cookie, cb, file_path, parser, src->getIndexFile());
             return;
         }
-        if (cookie->getAttach<HttpCookieAttachment>()._find_src) {
-            //查找过MediaSource，但是流已经注销了，不用再查找
+        if (attach._find_src && attach._find_src_ticker.elapsedTime() < kFindSrcIntervalSecond * 1000) {
+            // 最近已经查找过MediaSource了，为了防止频繁查找导致占用全局互斥锁的问题，我们尝试直接从磁盘返回hls索引文件
             response_file(cookie, cb, file_path, parser);
             return;
         }
@@ -560,6 +566,9 @@ static void accessFile(Session &sender, const Parser &parser, const MediaInfo &m
             // 标记找到MediaSource
             attach._find_src = true;
 
+            // 重置查找MediaSource计时
+            attach._find_src_ticker.resetTime();
+
             // m3u8文件可能不存在, 等待m3u8索引文件按需生成
             hls->getIndexFile([response_file, file_path, cookie, cb, parser](const string &file) {
                 response_file(cookie, cb, file_path, parser, file);