Fix memory management issues in RFC 3164 formatted syslog message

src/RFC3164FormattedSyslogMessage.h

@@ -31,19 +31,33 @@ class RFC3164FormattedSyslogMessage {
 public:
 
     RFC3164FormattedSyslogMessage(const SyslogMessage& msg) : _message(msg) {
+        // locale takes over ownership of facet, so, no need to keep track of it
+        _stream.imbue(std::locale(std::locale::classic(), new boost::posix_time::time_facet("%b %e %H:%M:%S")));
     };
 
-    RFC3164FormattedSyslogMessage(const RFC3164FormattedSyslogMessage& orig) : _message(orig._message) {
+    RFC3164FormattedSyslogMessage(const RFC3164FormattedSyslogMessage& orig) : RFC3164FormattedSyslogMessage(orig._message) {
     };
 
     virtual ~RFC3164FormattedSyslogMessage() {
     };
 
-    std::string operator()();
+    std::string operator()() {
+        _stream.str("");
+        _stream << "<" << std::to_string(_message.priority()) << ">";
+        _stream << _message.timestamp() << " ";
+        _stream << _message.source() << " ";
+        _stream << _message.message();
+        std::string ret = _stream.str();
+        if (ret.size() > MAX_LEN) {
+            ret = ret.substr(0, MAX_LEN);
+        }
+        return ret;
+    };
 
 private:
     static const size_t MAX_LEN = 1024;
     const SyslogMessage& _message;
+    std::stringstream _stream;
 };
 
 #endif	/* RFC3164FORMATTEDSYSLOGMESSAGE_H */