diff --git a/server/WebHook.cpp b/server/WebHook.cpp
index 60af4d02..f160ab16 100644
--- a/server/WebHook.cpp
+++ b/server/WebHook.cpp
@@ -492,4 +492,4 @@ void installWebHook(){
 
 void unInstallWebHook(){
 
-}
\ No newline at end of file
+}
diff --git a/src/Http/HttpClient.cpp b/src/Http/HttpClient.cpp
index 8a23a8b2..9d85f5b1 100644
--- a/src/Http/HttpClient.cpp
+++ b/src/Http/HttpClient.cpp
@@ -69,17 +69,16 @@ void HttpClient::sendRequest(const string &strUrl, float fTimeOutSec) {
         //服务器域名
         host = FindField(host.data(), NULL, ":");
     }
-    _header.emplace(string("Host"), host);
-    _header.emplace(string("Tools"), "ZLMediaKit");
-    _header.emplace(string("Connection"), "keep-alive");
-    _header.emplace(string("Accept"), "*/*");
-    _header.emplace(string("Accept-Language"), "zh-CN,zh;q=0.8");
-    _header.emplace(string("User-Agent"),
-                    "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36");
+    _header.emplace("Host", host);
+    _header.emplace("Tools", "ZLMediaKit");
+    _header.emplace("Connection", "keep-alive");
+    _header.emplace("Accept", "*/*");
+    _header.emplace("Accept-Language", "zh-CN,zh;q=0.8");
+    _header.emplace("User-Agent","Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36");
 
     if (_body && _body->remainSize()) {
-        _header.emplace(string("Content-Length"), to_string(_body->remainSize()));
-        _header.emplace(string("Content-Type"), "application/x-www-form-urlencoded; charset=UTF-8");
+        _header.emplace("Content-Length", to_string(_body->remainSize()));
+        _header.emplace("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
     }
 
     bool bChanged = (_lastHost != host + ":" + to_string(port)) || (_isHttps != isHttps);
@@ -94,7 +93,7 @@ void HttpClient::sendRequest(const string &strUrl, float fTimeOutSec) {
     }
     if(!printer.empty()){
         printer.pop_back();
-        _header.emplace(string("Cookie"), printer);
+        _header.emplace("Cookie", printer);
     }
 
 
diff --git a/src/Rtsp/Rtsp.h b/src/Rtsp/Rtsp.h
index 8da208be..60f03a0e 100644
--- a/src/Rtsp/Rtsp.h
+++ b/src/Rtsp/Rtsp.h
@@ -125,15 +125,30 @@ struct StrCaseCompare {
 
 class StrCaseMap : public multimap<string, string, StrCaseCompare>{
 public:
+    typedef multimap<string, string, StrCaseCompare> Super ;
     StrCaseMap() = default;
     ~StrCaseMap() = default;
     string &operator[](const string &key){
         auto it = find(key);
         if(it == end()){
-            it = emplace(key,"");
+            it = Super::emplace(key,"");
         }
         return it->second;
     }
+
+    template <class K,class V>
+    void emplace(K &&k , V &&v) {
+        auto it = find(k);
+        if(it != end()){
+            return;
+        }
+        Super::emplace(std::forward<K>(k),std::forward<V>(v));
+    }
+
+    template <class K,class V>
+    void emplace_force(K &&k , V &&v) {
+        Super::emplace(std::forward<K>(k),std::forward<V>(v));
+    }
 };
 
 class Parser {
@@ -167,7 +182,7 @@ public:
 				auto field = FindField(line.data(), NULL, ": ");
 				auto value = FindField(line.data(), ": ", NULL);
 				if (field.size() != 0) {
-					_mapHeaders.emplace(field,value);
+					_mapHeaders.emplace_force(field,value);
 				}
 			}
 			start = start + line.size() + 2;
@@ -247,7 +262,7 @@ public:
 		for (string &key_val : arg_vec) {
 			auto key = FindField(key_val.data(), NULL, key_delim);
 			auto val = FindField(key_val.data(), key_delim, NULL);
-			ret.emplace(key,val);
+			ret.emplace_force(key,val);
 		}
 		return ret;
 	}