http_protocol_handler: catch invalid numbers when parsing

contrib/epee/include/net/http_protocol_handler.inl

@@ -328,8 +328,10 @@ namespace net_utils
 	inline bool analize_http_method(const boost::smatch& result, http::http_method& method, int& http_ver_major, int& http_ver_minor)
 	{
 		CHECK_AND_ASSERT_MES(result[0].matched, false, "simple_http_connection_handler::analize_http_method() assert failed...");
-		http_ver_major = boost::lexical_cast<int>(result[11]);
-		http_ver_minor = boost::lexical_cast<int>(result[12]);
+		if (!boost::conversion::try_lexical_convert<int>(result[11], http_ver_major))
+			return false;
+		if (!boost::conversion::try_lexical_convert<int>(result[12], http_ver_minor))
+			return false;
 
 		if(result[3].matched)
 			method = http::http_method_options;
@@ -357,7 +359,12 @@ namespace net_utils
 		boost::smatch result;	
 		if(boost::regex_search(m_cache, result, rexp_match_command_line, boost::match_default) && result[0].matched)
 		{
-			analize_http_method(result, m_query_info.m_http_method, m_query_info.m_http_ver_hi, m_query_info.m_http_ver_hi);
+			if (!analize_http_method(result, m_query_info.m_http_method, m_query_info.m_http_ver_hi, m_query_info.m_http_ver_hi))
+			{
+				m_state = http_state_error;
+				MERROR("Failed to analyze method");
+				return false;
+			}
 			m_query_info.m_URI = result[10];
 			if (!parse_uri(m_query_info.m_URI, m_query_info.m_uri_content))
 			{
@@ -554,7 +561,8 @@ namespace net_utils
 		if(!(boost::regex_search( str, result, rexp_mach_field, boost::match_default) && result[0].matched))
 			return false;
 
-		len = boost::lexical_cast<size_t>(result[0]);
+		try { len = boost::lexical_cast<size_t>(result[0]); }
+		catch(...) { return false; }
 		return true;
 	}
 	//-----------------------------------------------------------------------------------