use string for const char*

@@ -1109,19 +1109,19 @@ int SrsHttpUri::initialize(string _url)
     return ret;
 }
 
-const char* SrsHttpUri::get_url()
+string SrsHttpUri::get_url()
 {
-    return url.data();
+    return url;
 }
 
-const char* SrsHttpUri::get_schema()
+string SrsHttpUri::get_schema()
 {
-    return schema.data();
+    return schema;
 }
 
-const char* SrsHttpUri::get_host()
+string SrsHttpUri::get_host()
 {
-    return host.data();
+    return host;
 }
 
 int SrsHttpUri::get_port()
@@ -1129,14 +1129,14 @@ int SrsHttpUri::get_port()
     return port;
 }
 
-const char* SrsHttpUri::get_path()
+string SrsHttpUri::get_path()
 {
-    return path.data();
+    return path;
 }
 
-const char* SrsHttpUri::get_query()
+string SrsHttpUri::get_query()
 {
-    return query.data();
+    return query;
 }
 
 string SrsHttpUri::get_uri_field(string uri, http_parser_url* hp_u, http_parser_url_fields field)

@@ -369,12 +369,12 @@ public:
      */
     virtual int initialize(std::string _url);
 public:
-    virtual const char* get_url();
-    virtual const char* get_schema();
-    virtual const char* get_host();
+    virtual std::string get_url();
+    virtual std::string get_schema();
+    virtual std::string get_host();
     virtual int get_port();
-    virtual const char* get_path();
-    virtual const char* get_query();
+    virtual std::string get_path();
+    virtual std::string get_query();
 private:
     /**
      * get the parsed url field.

@@ -378,7 +378,7 @@ int SrsIngestSrsInput::parseM3u8(SrsHttpUri* url, double& td, double& duration)
     int ret = ERROR_SUCCESS;
     
     SrsHttpClient client;
-    srs_trace("parse input hls %s", url->get_url());
+    srs_trace("parse input hls %s", url->get_url().c_str());
     
     if ((ret = client.initialize(url->get_host(), url->get_port())) != ERROR_SUCCESS) {
         srs_error("connect to server failed. ret=%d", ret);
@@ -387,7 +387,7 @@ int SrsIngestSrsInput::parseM3u8(SrsHttpUri* url, double& td, double& duration)
     
     ISrsHttpMessage* msg = NULL;
     if ((ret = client.get(url->get_path(), "", &msg)) != ERROR_SUCCESS) {
-        srs_error("HTTP GET %s failed. ret=%d", url->get_url(), ret);
+        srs_error("HTTP GET %s failed. ret=%d", url->get_url().c_str(), ret);
         return ret;
     }
     
@@ -609,7 +609,7 @@ int SrsIngestSrsInput::SrsTsPiece::fetch(string m3u8)
     
     ISrsHttpMessage* msg = NULL;
     if ((ret = client.get(uri.get_path(), "", &msg)) != ERROR_SUCCESS) {
-        srs_error("HTTP GET %s failed. ret=%d", uri.get_url(), ret);
+        srs_error("HTTP GET %s failed. ret=%d", uri.get_url().c_str(), ret);
         return ret;
     }
     
@@ -1215,7 +1215,7 @@ int SrsIngestSrsOutput::connect()
         return ret;
     }
     
-    srs_trace("connect output=%s", out_rtmp->get_url());
+    srs_trace("connect output=%s", out_rtmp->get_url().c_str());
     
     // parse uri
     if (!req) {
@@ -1322,7 +1322,7 @@ int SrsIngestSrsOutput::connect_app(string ep_server, int ep_port)
 
 void SrsIngestSrsOutput::close()
 {
-    srs_trace("close output=%s", out_rtmp->get_url());
+    srs_trace("close output=%s", out_rtmp->get_url().c_str());
     h264_sps_pps_sent = false;
     
     srs_freep(client);