diff --git a/CMakeLists.txt b/CMakeLists.txt
index d80fb11..cb94b58 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,24 +7,20 @@ set(tile_VERSION_BUILD $ENV{CI_STEP_NUMBER})
 if(NOT tile_VERSION_BUILD)
   set(tile_VERSION_BUILD "0")
 endif()
-set(TILE_VERSION
-    "${tile_VERSION_MAJOR}.${tile_VERSION_MINOR}.${tile_VERSION_PATCH}.${tile_VERSION_BUILD}"
-)
+
 project(
   tile
   VERSION "${tile_VERSION_MAJOR}.${tile_VERSION_MINOR}.${tile_VERSION_PATCH}"
   LANGUAGES C CXX)
 
+set(TILE_VERSION "${PROJECT_VERSION}.${tile_VERSION_BUILD}")
+
 set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
 
 set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 
-# add static libgcc and libstdc++ for static linking set(CMAKE_C_FLAGS
-# "${CMAKE_C_FLAGS} -static-libgcc -static-libstdc++") set(CMAKE_CXX_FLAGS
-# "${CMAKE_CXX_FLAGS} -static-libgcc -static-libstdc++")
-
 option(TILE_BUILD_TESTS "Build tests" OFF)
 option(TILE_BUILD_BENCHMARKS "Build tests" OFF)
 option(TILE_WITH_OPENSSL "Build wih openssl" OFF)
@@ -283,7 +279,7 @@ if(TILE_BUILD_TESTS)
 
       tile_add_test(${TEST_NAME} ${SRC_FILE})
     endforeach()
-  endfunction(add_test_group)
+  endfunction()
 
   add_test_group(${CMAKE_CURRENT_SOURCE_DIR}/tile/system system)
   add_test_group(${CMAKE_CURRENT_SOURCE_DIR}/tile/base base)
@@ -292,7 +288,7 @@ if(TILE_BUILD_TESTS)
   add_test_group(${CMAKE_CURRENT_SOURCE_DIR}/tile/net net)
   add_test_group(${CMAKE_CURRENT_SOURCE_DIR}/tile/rpc rpc)
   tile_add_custom_test("custom_http_client_test" "tests/http_client_test.cc")
-endif(TILE_BUILD_TESTS)
+endif()
 
 if(TILE_BUILD_BENCHMARKS)
   add_subdirectory("third_party/benchmark")
@@ -318,4 +314,4 @@ if(TILE_BUILD_BENCHMARKS)
   tile_add_bm(base_internal_time_keeper_benchmark
               "tile/base/internal/time_keeper_benchmark.cc")
   tile_add_bm(base_chrono_benchmark "tile/base/chrono_benchmark.cc")
-endif(TILE_BUILD_BENCHMARKS)
+endif()
diff --git a/README.md b/README.md
index 4a0bddb..121a28a 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,8 @@
 ## TILE
 一个`C++11`工具库，集成常见的编码工具
+## TODO
+  - [ ] 支持`EventLoop`的模式的网络库
+    - [ ] 支持UDP
+    - [ ] 支持TCP
+
 
diff --git a/tile/base/slice.h b/tile/base/slice.h
index 8ec1435..6924750 100644
--- a/tile/base/slice.h
+++ b/tile/base/slice.h
@@ -225,6 +225,28 @@ operator+(const Slice &lhs, const Slice &rhs)
     return lhs.ToString() + rhs.ToString();
 }
 
+static_assert(std::is_constructible<Slice, char>::value, "Can't Build Sliece");
+static_assert(std::is_constructible<Slice, char &>::value, "Can't Build Sliece");
+static_assert(std::is_constructible<Slice, const char>::value, "Can't Build Sliece");
+static_assert(std::is_constructible<Slice, const char &>::value, "Can't Build Sliece");
+
+static_assert(std::is_constructible<Slice, char[]>::value, "Can't Build Sliece");
+static_assert(std::is_constructible<Slice, const char[]>::value, "Can't Build Sliece");
+
+static_assert(std::is_constructible<Slice, char[2]>::value, "Can't Build Sliece");
+static_assert(std::is_constructible<Slice, const char[2]>::value, "Can't Build Sliece");
+
+static_assert(std::is_constructible<Slice, char *>::value, "Can't Build Sliece");
+static_assert(std::is_constructible<Slice, const char *>::value, "Can't Build Sliece");
+
+static_assert(std::is_constructible<Slice, void *, int>::value, "Can't Build Sliece");
+static_assert(std::is_constructible<Slice, const void *, int>::value, "Can't Build Sliece");
+
+static_assert(std::is_constructible<Slice, std::string>::value, "Can't Build Sliece");
+static_assert(std::is_constructible<Slice, std::string &>::value, "Can't Build Sliece");
+static_assert(std::is_constructible<Slice, const std::string>::value, "Can't Build Sliece");
+static_assert(std::is_constructible<Slice, const std::string &>::value, "Can't Build Sliece");
+
 }// namespace tile
 
 namespace std {
diff --git a/tile/base/string.cc b/tile/base/string.cc
index deb2c90..ce8c8b9 100644
--- a/tile/base/string.cc
+++ b/tile/base/string.cc
@@ -121,24 +121,6 @@ Split(Slice s, Slice delim, bool keep_empty, std::size_t max_split_parts)
     return splited;
 }
 
-Slice
-TrimLeft(Slice s, Slice cutset)
-{
-    return TrimLeft(s, [&cutset](char c) { return cutset.find(Slice(&c, 1)) != Slice::npos; });
-}
-
-Slice
-TrimRight(Slice s, Slice cutset)
-{
-    return TrimRight(s, [&cutset](char c) { return cutset.find(Slice(&c, 1)) != Slice::npos; });
-}
-
-Slice
-Trim(Slice s, Slice cutset)
-{
-    return Trim(s, [&cutset](char c) { return cutset.find(Slice(&c, 1)) != Slice::npos; });
-}
-
 template<typename T>
 void
 JoinImpl(const T &parts, Slice delim, std::string *result)
diff --git a/tile/base/string.h b/tile/base/string.h
index 45c865b..e75ed68 100644
--- a/tile/base/string.h
+++ b/tile/base/string.h
@@ -39,12 +39,8 @@ bool EndsWithIgnoreCase(Slice s, Slice prefix);
 void Replace(Slice from, Slice to, std::string *str, std::size_t count = std::numeric_limits<std::size_t>::max());
 std::string Replace(Slice str, Slice from, Slice to, std::size_t count = std::numeric_limits<std::size_t>::max());
 
-Slice TrimLeft(Slice s, Slice cutset);
-Slice TrimRight(Slice s, Slice cutset);
-Slice Trim(Slice s, Slice cutset);
-
 template<typename Pred = int(int)>
-Slice
+enable_if_t<!std::is_constructible<Slice, Pred>::value, Slice>
 TrimLeft(Slice s, Pred pred = isspace)
 {
     while (!s.empty() && pred(s[0])) { s.RemovePrefix(1); }
@@ -52,7 +48,7 @@ TrimLeft(Slice s, Pred pred = isspace)
 }
 
 template<typename Pred = int(int)>
-Slice
+enable_if_t<!std::is_constructible<Slice, Pred>::value, Slice>
 TrimRight(Slice s, Pred pred = isspace)
 {
     while (!s.empty() && pred(s[s.size() - 1])) { s.RemoveSuffix(1); }
@@ -60,12 +56,36 @@ TrimRight(Slice s, Pred pred = isspace)
 }
 
 template<typename Pred = int(int)>
-Slice
+enable_if_t<!std::is_constructible<Slice, Pred>::value, Slice>
 Trim(Slice s, Pred pred = isspace)
 {
     return TrimRight(TrimLeft(s, pred), pred);
 }
 
+template<typename T>
+enable_if_t<std::is_constructible<Slice, T>::value, Slice>
+TrimLeft(Slice s, T slice_like)
+{
+    Slice cutset(slice_like);
+    return TrimLeft(s, [&cutset](char c) { return cutset.find(c) != Slice::npos; });
+}
+
+template<typename T>
+enable_if_t<std::is_constructible<Slice, T>::value, Slice>
+TrimRight(Slice s, T slice_like)
+{
+    Slice cutset(slice_like);
+    return TrimRight(s, [&cutset](char c) { return cutset.find(c) != Slice::npos; });
+}
+
+template<typename T>
+enable_if_t<std::is_constructible<Slice, T>::value, Slice>
+Trim(Slice s, T slice_like)
+{
+    Slice cutset(slice_like);
+    return Trim(s, [&cutset](char c) { return cutset.find(c) != Slice::npos; });
+}
+
 std::vector<Slice> Split(Slice s,
                          char delim,
                          bool keep_empty             = false,
diff --git a/tile/base/string_test.cc b/tile/base/string_test.cc
index 79697a9..b683493 100644
--- a/tile/base/string_test.cc
+++ b/tile/base/string_test.cc
@@ -184,6 +184,17 @@ TEST(String, Trim)
     ASSERT_EQ("a a", Trim("  a a  "));
 }
 
+TEST(String, TrimByCustset)
+{
+    static_assert(std::is_constructible<Slice, decltype("d")>::value, "");
+    static_assert(!std::is_constructible<Slice, int(int)>::value, "");
+    ASSERT_EQ(" ", Trim("abcd abcd", "abcd"));
+    ASSERT_EQ("abcd abc", Trim("abcd abcd", "d"));
+    ASSERT_EQ("abcd abcd ", Trim("abcd abcd ", "d"));
+    ASSERT_EQ(" abcd abcd ", Trim(" abcd abcd ", "ad"));
+    ASSERT_EQ("bcd abc", Trim(" abcd abcd ", "ad "));
+}
+
 TEST(String, Split1)
 {
     auto splited = Split("/a/b/c/d/e/f///g", '/');
diff --git a/tile/rpc/http_handler.h b/tile/rpc/http_handler.h
index e69de29..aab938d 100644
--- a/tile/rpc/http_handler.h
+++ b/tile/rpc/http_handler.h
@@ -0,0 +1,8 @@
+#ifndef TILE_RPC_HTTP_HANDLER_H
+#define TILE_RPC_HTTP_HANDLER_H
+
+#pragma once
+
+#include <stdio.h>
+
+#endif// TILE_RPC_HTTP_HANDLER_H
diff --git a/tile/rpc/protocol/http/buffer_io.cc b/tile/rpc/protocol/http/buffer_io.cc
index 275e647..2487de2 100644
--- a/tile/rpc/protocol/http/buffer_io.cc
+++ b/tile/rpc/protocol/http/buffer_io.cc
@@ -54,14 +54,20 @@ EasyDetectHttp(const void *data, std::size_t length)
 }
 
 std::size_t
-DetermineHeaderSizeFast(const char *const ptr, std::size_t limit)
+DetermineHeaderSizeFast(const char *const ptr, std::size_t length)
 {
-    auto ep = ptr + limit;
-    auto p  = ptr + 1;
+    char *first_end_pos = (char *) memmem(ptr, length, "\r\n\r\n", 4);
+
+    if (first_end_pos == NULL) { return -1; }
+    return first_end_pos + 4 - ptr;
+
+    /*
+    auto end_ptr = ptr + length;
+    auto p       = ptr + 1;
     while (true) {
         // First '\n' in '\r\n\r\n'
-        p = static_cast<char *>(memchr(const_cast<char *>(p), '\n', ep - p));
-        if (TILE_UNLIKELY(p == nullptr || ep - p < 3)) { return -1; }
+        p = static_cast<char *>(memchr(const_cast<char *>(p), '\n', end_ptr - p));
+        if (TILE_UNLIKELY(p == nullptr || end_ptr - p < 3)) { return -1; }
 
         if (p[2] == '\n') {
             TILE_CHECK_GE(p - 1, ptr);
@@ -73,6 +79,7 @@ DetermineHeaderSizeFast(const char *const ptr, std::size_t limit)
         }
         ++p;
     }
+    */
 }
 
 }// namespace