refine the global variables.

@@ -55,7 +55,7 @@ using namespace std;
 
 using namespace _srs_internal;
 
-// the version to identify the core.
+// @global the version to identify the core.
 const char* _srs_version = "XCORE-"RTMP_SIG_SRS_SERVER;
 
 #define SRS_WIKI_URL_LOG "https://github.com/ossrs/srs/wiki/v1_CN_SrsLog"
@@ -4194,7 +4194,7 @@ bool SrsConfig::get_utc_time()
 }
 
 string SrsConfig::get_work_dir() {
-    static string DEFAULT = "";
+    static string DEFAULT = "./";
     
     SrsConfDirective* conf = root->get("work_dir");
     if( !conf || conf->arg0().empty()) {

@@ -125,7 +125,7 @@ extern std::string srs_config_bool2switch(const std::string& sbool);
  */
 extern int srs_config_transform_vhost(SrsConfDirective* root);
 
-// global config
+// @global config object.
 extern SrsConfig* _srs_config;
 
 /**

@@ -1318,6 +1318,7 @@ SrsConnection* SrsServer::fd2conn(SrsListenerType type, st_netfd_t stfd)
     }
     
     SrsConnection* conn = NULL;
+    bool close_for_not_served = false;
     
     if (type == SrsListenerRtmpStream) {
         conn = new SrsRtmpConn(this, stfd, ip);
@@ -1326,18 +1327,23 @@ SrsConnection* SrsServer::fd2conn(SrsListenerType type, st_netfd_t stfd)
         conn = new SrsHttpApi(this, stfd, http_api_mux, ip);
 #else
         srs_warn("close http client for server not support http-api");
-        srs_close_stfd(stfd);
-        return ret;
+        close_for_not_served = true;
 #endif
     } else if (type == SrsListenerHttpStream) {
 #ifdef SRS_AUTO_HTTP_SERVER
         conn = new SrsResponseOnlyHttpConn(this, stfd, http_server, ip);
 #else
         srs_warn("close http client for server not support http-server");
-        return NULL;
+        close_for_not_served = true;
 #endif
     } else {
         // TODO: FIXME: handler others
+        srs_assert(false);
+    }
+    
+    if (close_for_not_served) {
+        srs_close_stfd(stfd);
+        return NULL;
     }
     
     return conn;

@@ -124,10 +124,10 @@ public:
     virtual int set_id(int v);
 };
 
-// user must provides a log object
+// @global user must provides a log object
 extern ISrsLog* _srs_log;
 
-// user must implements the LogContext and define a global instance.
+// @global user must implements the LogContext and define a global instance.
 extern ISrsThreadContext* _srs_context;
 
 // donot print method

@@ -52,15 +52,11 @@ using namespace std;
 // pre-declare
 int proxy_hls2rtmp(std::string hls, std::string rtmp);
 
-// for the main objects(server, config, log, context),
-// never subscribe handler in constructor,
-// instead, subscribe handler in initialize method.
-// kernel module.
+// @global log and context.
 ISrsLog* _srs_log = new SrsFastLog();
 ISrsThreadContext* _srs_context = new ISrsThreadContext();
-// app module.
+// @global config object for app module.
 SrsConfig* _srs_config = NULL;
-SrsServer* _srs_server = NULL;
 
 #if defined(SRS_AUTO_HTTP_CORE)
 

@@ -46,21 +46,19 @@ using namespace std;
 #include <srs_kernel_utility.hpp>
 #include <srs_core_performance.hpp>
 #include <srs_app_utility.hpp>
+#include <srs_core_autofree.hpp>
 
 // pre-declare
-int run();
-int run_master();
+int run(SrsServer* svr);
+int run_master(SrsServer* svr);
 
-// for the main objects(server, config, log, context),
-// never subscribe handler in constructor,
-// instead, subscribe handler in initialize method.
-// kernel module.
+// @global log and context.
 ISrsLog* _srs_log = new SrsFastLog();
-ISrsThreadContext* _srs_context = new SrsThreadContext();
-// app module.
+ISrsThreadContext* _srs_context = new ISrsThreadContext();
+// @global config object for app module.
 SrsConfig* _srs_config = new SrsConfig();
-SrsServer* _srs_server = new SrsServer();
-// version of srs, which can grep keyword "XCORE"
+
+// @global version of srs, which can grep keyword "XCORE"
 extern const char* _srs_version;
 
 /**
@@ -315,24 +313,27 @@ int main(int argc, char** argv)
 
     // features
     show_macro_features();
-
+    
+    SrsServer* svr = new SrsServer();
+    SrsAutoFree(SrsServer, svr);
+    
     /**
     * we do nothing in the constructor of server,
     * and use initialize to create members, set hooks for instance the reload handler,
     * all initialize will done in this stage.
     */
-    if ((ret = _srs_server->initialize(NULL)) != ERROR_SUCCESS) {
+    if ((ret = svr->initialize(NULL)) != ERROR_SUCCESS) {
         return ret;
     }
     
-    return run();
+    return run(svr);
 }
 
-int run()
+int run(SrsServer* svr)
 {
     // if not deamon, directly run master.
     if (!_srs_config->get_deamon()) {
-        return run_master();
+        return run_master(svr);
     }
     
     srs_trace("start deamon mode...");
@@ -370,42 +371,42 @@ int run()
     // son
     srs_trace("son(deamon) process running.");
     
-    return run_master();
+    return run_master(svr);
 }
 
-int run_master()
+int run_master(SrsServer* svr)
 {
     int ret = ERROR_SUCCESS;
     
-    if ((ret = _srs_server->initialize_st()) != ERROR_SUCCESS) {
+    if ((ret = svr->initialize_st()) != ERROR_SUCCESS) {
         return ret;
     }
 
-    if ((ret = _srs_server->initialize_signal()) != ERROR_SUCCESS) {
+    if ((ret = svr->initialize_signal()) != ERROR_SUCCESS) {
         return ret;
     }
     
-    if ((ret = _srs_server->acquire_pid_file()) != ERROR_SUCCESS) {
+    if ((ret = svr->acquire_pid_file()) != ERROR_SUCCESS) {
         return ret;
     }
     
-    if ((ret = _srs_server->listen()) != ERROR_SUCCESS) {
+    if ((ret = svr->listen()) != ERROR_SUCCESS) {
         return ret;
     }
     
-    if ((ret = _srs_server->register_signal()) != ERROR_SUCCESS) {
+    if ((ret = svr->register_signal()) != ERROR_SUCCESS) {
         return ret;
     }
     
-    if ((ret = _srs_server->http_handle()) != ERROR_SUCCESS) {
+    if ((ret = svr->http_handle()) != ERROR_SUCCESS) {
         return ret;
     }
     
-    if ((ret = _srs_server->ingest()) != ERROR_SUCCESS) {
+    if ((ret = svr->ingest()) != ERROR_SUCCESS) {
         return ret;
     }
     
-    if ((ret = _srs_server->cycle()) != ERROR_SUCCESS) {
+    if ((ret = svr->cycle()) != ERROR_SUCCESS) {
         return ret;
     }