diff --git a/include/raii/curl_string.hpp b/include/raii/curl_string.hpp
index cc9508a..1488035 100644
--- a/include/raii/curl_string.hpp
+++ b/include/raii/curl_string.hpp
@@ -41,17 +41,7 @@ namespace raii{
 
 	}
 
-	//curl allocated string
-	struct curl_string : public string_intermediary<detail::curl_allocator>
-	{
-		curl_string(const curl_string&) = default;
-		curl_string(curl_string&&) = default;
-		curl_string& operator=(const curl_string&) = default;
-		curl_string& operator=(curl_string&&) = default;
-
-		using string_intermediary<detail::curl_allocator>::string_intermediary;
-		using string_intermediary<detail::curl_allocator>::operator=;
-	};
+	using curl_string = string_intermediary<detail::curl_allocator>;
 
 
 }
diff --git a/include/raii/string.hpp b/include/raii/string.hpp
index 7d5174c..4bd4732 100644
--- a/include/raii/string.hpp
+++ b/include/raii/string.hpp
@@ -48,48 +48,8 @@ namespace raii{
 	}
 
 	//new allocated string
-	struct string : public string_intermediary<detail::default_allocator>
-	{
-		string(const string&) = default;
-		string(string&&) = default;
-		string& operator=(const string&) = default;
-		string& operator=(string&&) = default;
+	using string = string_intermediary<detail::default_allocator>;
 
-		using string_intermediary<detail::default_allocator>::string_intermediary;
-		using string_intermediary<detail::default_allocator>::operator=;
-	};
-
-	namespace detail{
-		size_t _calc_escaped_len(const char* str);
-		char _escape_to_letter(char escape);
-		size_t _sanitize_json_copy(char* dest, const char* in);
-
-		template<class Tup, size_t I = 0>
-		void _js_assign(char* dest, Tup&& t, size_t offset){
-			size_t written = _sanitize_json_copy(dest+offset, std::get<I>(t));
-			if constexpr(I+2 < std::tuple_size<std::remove_reference_t<Tup>>::value){
-				_js_assign<Tup,I+2>(dest, std::forward<Tup>(t), offset+written);
-			}
-		}
-		template<class T, size_t I = 0>
-		size_t _calc_escaped_len_all(T&& t){
-			size_t len = _calc_escaped_len(std::get<I>(t));
-			if constexpr(I+2 < std::tuple_size<std::remove_reference_t<T>>::value){
-				len += _calc_escaped_len_all<T,I+2>(std::forward<T>(t));
-			}
-			return len;
-		}
-	}
-	template<class T, typename std::enable_if<detail::is_string<T>::value && !detail::is_concrete_string<T>::value,void>::type* = nullptr>
-	string json_escape(T&& t){
-		auto tup = t.get();
-		size_t len = detail::_calc_escaped_len_all(tup);
-		char* tmp = reinterpret_cast<char*>(string::allocator_type::allocate(len+1));
-		detail::_js_assign(tmp, tup, 0);
-		tmp[len] = 0;
-		return string(tmp, len);
-	}
-	string json_escape(const string_base& str);
 }
 
 #endif
diff --git a/include/raii/string_base.hpp b/include/raii/string_base.hpp
index be3ab32..cc251d6 100644
--- a/include/raii/string_base.hpp
+++ b/include/raii/string_base.hpp
@@ -53,6 +53,8 @@ namespace raii{
 		};
 	}
 
+
+
 	//Base of all RAII strings. Its use is allowing passing of raii strings to functions without knowing the exact type
 	class string_base : public string_expr
 	{
@@ -129,6 +131,8 @@ namespace raii{
 		virtual char* _copy(const char*, size_t)const = 0;
 	};
 
+
+
 	//Supplies all functions that string_base can't implement
 	template<class Allocator>
 	class string_intermediary : public string_base
@@ -210,6 +214,8 @@ namespace raii{
 		}
 	};
 
+
+
 	//check for member function 'length'
 	namespace detail{
 		template<class T>
@@ -227,6 +233,8 @@ namespace raii{
 
 	}
 
+
+
 	//Like an expression template but not really
 	template<class Left, class Right>
 	class string_cat_expr : public string_expr
@@ -297,6 +305,8 @@ namespace raii{
 
 }
 
+
+
 template<class Right, typename std::enable_if<raii::detail::is_string<Right>::value,void>::type* = nullptr>
 auto operator+(const char* left, Right&& right){
 	return raii::string_cat_expr<const char*,decltype(std::forward<Right>(right))>(left, std::forward<Right>(right));
diff --git a/include/raii/util.hpp b/include/raii/util.hpp
new file mode 100644
index 0000000..3fa8b6b
--- /dev/null
+++ b/include/raii/util.hpp
@@ -0,0 +1,59 @@
+/**
+	This file is a part of rexy's matrix bot
+	Copyright (C) 2019 rexy712
+
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU Affero General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU Affero General Public License for more details.
+
+	You should have received a copy of the GNU Affero General Public License
+	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef RAII_UTIL_HPP
+#define RAII_UTIL_HPP
+
+#include "raii/string.hpp"
+
+namespace raii{
+
+	namespace detail{
+		size_t _calc_escaped_len(const char* str);
+		char _escape_to_letter(char escape);
+		size_t _sanitize_json_copy(char* dest, const char* in);
+
+		template<class Tup, size_t I = 0>
+		void _js_assign(char* dest, Tup&& t, size_t offset){
+			size_t written = _sanitize_json_copy(dest+offset, std::get<I>(t));
+			if constexpr(I+2 < std::tuple_size<std::remove_reference_t<Tup>>::value){
+				_js_assign<Tup,I+2>(dest, std::forward<Tup>(t), offset+written);
+			}
+		}
+		template<class T, size_t I = 0>
+		size_t _calc_escaped_len_all(T&& t){
+			size_t len = _calc_escaped_len(std::get<I>(t));
+			if constexpr(I+2 < std::tuple_size<std::remove_reference_t<T>>::value){
+				len += _calc_escaped_len_all<T,I+2>(std::forward<T>(t));
+			}
+			return len;
+		}
+	}
+	template<class T, typename std::enable_if<detail::is_string<T>::value && !detail::is_concrete_string<T>::value,void>::type* = nullptr>
+	string json_escape(T&& t){
+		auto tup = t.get();
+		size_t len = detail::_calc_escaped_len_all(tup);
+		char* tmp = reinterpret_cast<char*>(string::allocator_type::allocate(len+1));
+		detail::_js_assign(tmp, tup, 0);
+		tmp[len] = 0;
+		return string(tmp, len);
+	}
+	string json_escape(const string_base& str);
+}
+
+#endif
diff --git a/src/fat_strings.cpp b/src/fat_strings.cpp
index 134d55a..becfeed 100644
--- a/src/fat_strings.cpp
+++ b/src/fat_strings.cpp
@@ -19,6 +19,7 @@
 #include "fat_strings.hpp"
 #include "matrix.hpp"
 #include "raii/static_string.hpp"
+#include "raii/util.hpp"
 
 namespace matrix::detail{
 
diff --git a/src/matrix.cpp b/src/matrix.cpp
index 34833bf..1233ccf 100644
--- a/src/matrix.cpp
+++ b/src/matrix.cpp
@@ -25,6 +25,7 @@
 #include "raii/rjp_ptr.hpp"
 #include "raii/filerd.hpp"
 #include "fat_strings.hpp"
+#include "raii/util.hpp"
 
 #include "libav/frame.hpp"
 #include "libav/codec/context.hpp"
diff --git a/src/raii/string_base.cpp b/src/raii/string_base.cpp
index cac98ee..90e4483 100644
--- a/src/raii/string_base.cpp
+++ b/src/raii/string_base.cpp
@@ -89,73 +89,4 @@ namespace raii{
 		return m_data[i];
 	}
 
-	namespace detail{
-
-		size_t _calc_escaped_len(const char* str){
-			size_t ret = 0;
-			for(const char* c = str;*c;++c){
-				switch(*c){
-				case '\\':
-				case '"':
-				case '/':
-				case '\n':
-				case '\r':
-				case '\b':
-				case '\f':
-				case '\t':
-					++ret;
-					break;
-				};
-				++ret;
-			}
-			return ret;
-		}
-		char _escape_to_letter(char escape){
-			switch(escape){
-				case '\n':
-					return 'n';
-				case '\r':
-					return 'r';
-				case '\b':
-					return 'b';
-				case '\f':
-					return 'f';
-				case '\t':
-					return 't';
-			};
-			return '\\';
-		}
-		size_t _sanitize_json_copy(char* dest, const char* in){
-			size_t pos = 0;
-			for(const char* c = in;*c;++c){
-				switch(*c){
-				case '"':
-				case '\\':
-				case '/':
-					dest[pos++] = '\\';
-					dest[pos++] = *c;
-					break;
-				case '\n':
-				case '\r':
-				case '\b':
-				case '\f':
-				case '\t':
-					dest[pos++] = '\\';
-					dest[pos++] = _escape_to_letter(*c);
-					break;
-				default:
-					dest[pos++] = *c;
-				};
-			}
-			dest[pos] = 0;
-			return pos;
-		}
-	}
-	string json_escape(const string_base& str){
-		size_t len = detail::_calc_escaped_len(str.get());
-		char* tmp = reinterpret_cast<char*>(string::allocator_type::allocate(len+1));
-		detail::_sanitize_json_copy(tmp, str);
-		tmp[len] = 0;
-		return string(tmp, len);
-	}
 }
diff --git a/src/raii/util.cpp b/src/raii/util.cpp
new file mode 100644
index 0000000..9359035
--- /dev/null
+++ b/src/raii/util.cpp
@@ -0,0 +1,92 @@
+/**
+	This file is a part of rexy's matrix bot
+	Copyright (C) 2019 rexy712
+
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU Affero General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU Affero General Public License for more details.
+
+	You should have received a copy of the GNU Affero General Public License
+	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "raii/string.hpp"
+
+namespace raii{
+
+	namespace detail{
+
+		size_t _calc_escaped_len(const char* str){
+			size_t ret = 0;
+			for(const char* c = str;*c;++c){
+				switch(*c){
+				case '\\':
+				case '"':
+				case '/':
+				case '\n':
+				case '\r':
+				case '\b':
+				case '\f':
+				case '\t':
+					++ret;
+					break;
+				};
+				++ret;
+			}
+			return ret;
+		}
+		char _escape_to_letter(char escape){
+			switch(escape){
+				case '\n':
+					return 'n';
+				case '\r':
+					return 'r';
+				case '\b':
+					return 'b';
+				case '\f':
+					return 'f';
+				case '\t':
+					return 't';
+			};
+			return '\\';
+		}
+		size_t _sanitize_json_copy(char* dest, const char* in){
+			size_t pos = 0;
+			for(const char* c = in;*c;++c){
+				switch(*c){
+				case '"':
+				case '\\':
+				case '/':
+					dest[pos++] = '\\';
+					dest[pos++] = *c;
+					break;
+				case '\n':
+				case '\r':
+				case '\b':
+				case '\f':
+				case '\t':
+					dest[pos++] = '\\';
+					dest[pos++] = _escape_to_letter(*c);
+					break;
+				default:
+					dest[pos++] = *c;
+				};
+			}
+			dest[pos] = 0;
+			return pos;
+		}
+	}
+	string json_escape(const string_base& str){
+		size_t len = detail::_calc_escaped_len(str.get());
+		char* tmp = reinterpret_cast<char*>(string::allocator_type::allocate(len+1));
+		detail::_sanitize_json_copy(tmp, str);
+		tmp[len] = 0;
+		return string(tmp, len);
+	}
+}