diff --git a/core/containers/msg_buffer.cpp b/core/containers/msg_buffer.cpp
new file mode 100644
index 0000000..eb8fd32
--- /dev/null
+++ b/core/containers/msg_buffer.cpp
@@ -0,0 +1,200 @@
+/**
+ *
+ *  MsgBuffer.cc
+ *  An Tao
+ *
+ *  Public header file in trantor lib.
+ *
+ *  Copyright 2018, An Tao.  All rights reserved.
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the License file.
+ *
+ *
+ */
+
+#include "msg_buffer.h"
+
+#include <string.h>
+#include "core/math/math.h"
+#ifndef _WIN32
+#include <netinet/in.h>
+#include <sys/uio.h>
+#else
+#include <WindowsSupport.h>
+#include <winsock2.h>
+#endif
+#include <assert.h>
+#include <errno.h>
+
+using namespace trantor;
+namespace trantor {
+static constexpr size_t kBufferOffset{ 8 };
+}
+
+MsgBuffer::MsgBuffer(size_t len) :
+		head_(kBufferOffset), initCap_(len), buffer_(len + head_), tail_(head_) {
+}
+
+void MsgBuffer::ensureWritableBytes(size_t len) {
+	if (writableBytes() >= len)
+		return;
+	if (head_ + writableBytes() >=
+			(len + kBufferOffset)) // move readable bytes
+	{
+		std::copy(begin() + head_, begin() + tail_, begin() + kBufferOffset);
+		tail_ = kBufferOffset + (tail_ - head_);
+		head_ = kBufferOffset;
+		return;
+	}
+	// create new buffer
+	size_t newLen;
+	if ((buffer_.size() * 2) > (kBufferOffset + readableBytes() + len))
+		newLen = buffer_.size() * 2;
+	else
+		newLen = kBufferOffset + readableBytes() + len;
+	MsgBuffer newbuffer(newLen);
+	newbuffer.append(*this);
+	swap(newbuffer);
+}
+void MsgBuffer::swap(MsgBuffer &buf) noexcept {
+	buffer_.swap(buf.buffer_);
+	std::swap(head_, buf.head_);
+	std::swap(tail_, buf.tail_);
+	std::swap(initCap_, buf.initCap_);
+}
+void MsgBuffer::append(const MsgBuffer &buf) {
+	ensureWritableBytes(buf.readableBytes());
+	memcpy(&buffer_[tail_], buf.peek(), buf.readableBytes());
+	tail_ += buf.readableBytes();
+}
+void MsgBuffer::append(const char *buf, size_t len) {
+	ensureWritableBytes(len);
+	memcpy(&buffer_[tail_], buf, len);
+	tail_ += len;
+}
+void MsgBuffer::appendInt16(const uint16_t s) {
+	uint16_t ss = htons(s);
+	append(static_cast<const char *>((void *)&ss), 2);
+}
+void MsgBuffer::appendInt32(const uint32_t i) {
+	uint32_t ii = htonl(i);
+	append(static_cast<const char *>((void *)&ii), 4);
+}
+void MsgBuffer::appendInt64(const uint64_t l) {
+	uint64_t ll = Math::hton64(l);
+	append(static_cast<const char *>((void *)&ll), 8);
+}
+
+void MsgBuffer::addInFrontInt16(const uint16_t s) {
+	uint16_t ss = htons(s);
+	addInFront(static_cast<const char *>((void *)&ss), 2);
+}
+void MsgBuffer::addInFrontInt32(const uint32_t i) {
+	uint32_t ii = htonl(i);
+	addInFront(static_cast<const char *>((void *)&ii), 4);
+}
+void MsgBuffer::addInFrontInt64(const uint64_t l) {
+	uint64_t ll = Math::hton64(l);
+	addInFront(static_cast<const char *>((void *)&ll), 8);
+}
+
+uint16_t MsgBuffer::peekInt16() const {
+	assert(readableBytes() >= 2);
+	uint16_t rs = *(static_cast<const uint16_t *>((void *)peek()));
+	return ntohs(rs);
+}
+uint32_t MsgBuffer::peekInt32() const {
+	assert(readableBytes() >= 4);
+	uint32_t rl = *(static_cast<const uint32_t *>((void *)peek()));
+	return ntohl(rl);
+}
+uint64_t MsgBuffer::peekInt64() const {
+	assert(readableBytes() >= 8);
+	uint64_t rll = *(static_cast<const uint64_t *>((void *)peek()));
+	return Math::ntoh64(rll);
+}
+
+void MsgBuffer::retrieve(size_t len) {
+	if (len >= readableBytes()) {
+		retrieveAll();
+		return;
+	}
+	head_ += len;
+}
+void MsgBuffer::retrieveAll() {
+	if (buffer_.size() > (initCap_ * 2)) {
+		buffer_.resize(initCap_);
+	}
+	tail_ = head_ = kBufferOffset;
+}
+ssize_t MsgBuffer::readFd(int fd, int *retErrno) {
+	char extBuffer[8192];
+	struct iovec vec[2];
+	size_t writable = writableBytes();
+	vec[0].iov_base = begin() + tail_;
+	vec[0].iov_len = static_cast<int>(writable);
+	vec[1].iov_base = extBuffer;
+	vec[1].iov_len = sizeof(extBuffer);
+	const int iovcnt = (writable < sizeof extBuffer) ? 2 : 1;
+	ssize_t n = ::readv(fd, vec, iovcnt);
+	if (n < 0) {
+		*retErrno = errno;
+	} else if (static_cast<size_t>(n) <= writable) {
+		tail_ += n;
+	} else {
+		tail_ = buffer_.size();
+		append(extBuffer, n - writable);
+	}
+	return n;
+}
+
+std::string MsgBuffer::read(size_t len) {
+	if (len > readableBytes())
+		len = readableBytes();
+	std::string ret(peek(), len);
+	retrieve(len);
+	return ret;
+}
+uint8_t MsgBuffer::readInt8() {
+	uint8_t ret = peekInt8();
+	retrieve(1);
+	return ret;
+}
+uint16_t MsgBuffer::readInt16() {
+	uint16_t ret = peekInt16();
+	retrieve(2);
+	return ret;
+}
+uint32_t MsgBuffer::readInt32() {
+	uint32_t ret = peekInt32();
+	retrieve(4);
+	return ret;
+}
+uint64_t MsgBuffer::readInt64() {
+	uint64_t ret = peekInt64();
+	retrieve(8);
+	return ret;
+}
+
+void MsgBuffer::addInFront(const char *buf, size_t len) {
+	if (head_ >= len) {
+		memcpy(begin() + head_ - len, buf, len);
+		head_ -= len;
+		return;
+	}
+	if (len <= writableBytes()) {
+		std::copy(begin() + head_, begin() + tail_, begin() + head_ + len);
+		memcpy(begin() + head_, buf, len);
+		tail_ += len;
+		return;
+	}
+	size_t newLen;
+	if (len + readableBytes() < initCap_)
+		newLen = initCap_;
+	else
+		newLen = len + readableBytes();
+	MsgBuffer newBuf(newLen);
+	newBuf.append(buf, len);
+	newBuf.append(*this);
+	swap(newBuf);
+}
diff --git a/web_backends/drogon/trantor/utils/MsgBuffer.h b/core/containers/msg_buffer.h
similarity index 100%
rename from web_backends/drogon/trantor/utils/MsgBuffer.h
rename to core/containers/msg_buffer.h
diff --git a/web_backends/drogon/drogon/lib/inc/drogon/HttpViewData.h b/web_backends/drogon/drogon/lib/inc/drogon/HttpViewData.h
index ca2525f..1e678b2 100644
--- a/web_backends/drogon/drogon/lib/inc/drogon/HttpViewData.h
+++ b/web_backends/drogon/drogon/lib/inc/drogon/HttpViewData.h
@@ -20,7 +20,7 @@
 #include <stdarg.h>
 #include <stdio.h>
 #include <trantor/utils/Logger.h>
-#include <trantor/utils/MsgBuffer.h>
+#include "core/containers/msg_buffer.h"
 #include <sstream>
 #include <string>
 #include <type_traits>
diff --git a/web_backends/drogon/drogon/lib/inc/http/HttpRequestImpl.h b/web_backends/drogon/drogon/lib/inc/http/HttpRequestImpl.h
index 6d3f63d..f167c54 100644
--- a/web_backends/drogon/drogon/lib/inc/http/HttpRequestImpl.h
+++ b/web_backends/drogon/drogon/lib/inc/http/HttpRequestImpl.h
@@ -23,7 +23,7 @@
 #include <trantor/net/EventLoop.h>
 #include "core/net/inet_address.h"
 #include <trantor/utils/Logger.h>
-#include <trantor/utils/MsgBuffer.h>
+#include "core/containers/msg_buffer.h"
 #include <trantor/utils/NonCopyable.h>
 #include <algorithm>
 #include <string>
diff --git a/web_backends/drogon/drogon/lib/inc/http/HttpRequestParser.cc b/web_backends/drogon/drogon/lib/inc/http/HttpRequestParser.cc
index 8809039..6214284 100644
--- a/web_backends/drogon/drogon/lib/inc/http/HttpRequestParser.cc
+++ b/web_backends/drogon/drogon/lib/inc/http/HttpRequestParser.cc
@@ -19,7 +19,7 @@
 #include "HttpUtils.h"
 #include <http/HttpTypes.h>
 #include <trantor/utils/Logger.h>
-#include <trantor/utils/MsgBuffer.h>
+#include "core/containers/msg_buffer.h"
 #include <iostream>
 
 using namespace trantor;
diff --git a/web_backends/drogon/drogon/lib/inc/http/HttpRequestParser.h b/web_backends/drogon/drogon/lib/inc/http/HttpRequestParser.h
index a682191..dd56745 100644
--- a/web_backends/drogon/drogon/lib/inc/http/HttpRequestParser.h
+++ b/web_backends/drogon/drogon/lib/inc/http/HttpRequestParser.h
@@ -17,7 +17,7 @@
 #include "../src/impl_forwards.h"
 #include <http/HttpTypes.h>
 #include <trantor/net/TcpConnection.h>
-#include <trantor/utils/MsgBuffer.h>
+#include "core/containers/msg_buffer.h"
 #include <trantor/utils/NonCopyable.h>
 #include <deque>
 #include <mutex>
diff --git a/web_backends/drogon/drogon/lib/inc/http/HttpResponseImpl.h b/web_backends/drogon/drogon/lib/inc/http/HttpResponseImpl.h
index b48ca1d..22fd499 100644
--- a/web_backends/drogon/drogon/lib/inc/http/HttpResponseImpl.h
+++ b/web_backends/drogon/drogon/lib/inc/http/HttpResponseImpl.h
@@ -21,7 +21,7 @@
 #include <drogon/utils/Utilities.h>
 #include "core/net/inet_address.h"
 #include "core/math/date.h"
-#include <trantor/utils/MsgBuffer.h>
+#include "core/containers/msg_buffer.h"
 #include <atomic>
 #include <memory>
 #include <mutex>
diff --git a/web_backends/drogon/drogon/lib/inc/http/HttpResponseParser.cc b/web_backends/drogon/drogon/lib/inc/http/HttpResponseParser.cc
index 75d6a83..3e183cc 100644
--- a/web_backends/drogon/drogon/lib/inc/http/HttpResponseParser.cc
+++ b/web_backends/drogon/drogon/lib/inc/http/HttpResponseParser.cc
@@ -15,7 +15,7 @@
 #include "HttpResponseParser.h"
 #include "HttpResponseImpl.h"
 #include <trantor/utils/Logger.h>
-#include <trantor/utils/MsgBuffer.h>
+#include "core/containers/msg_buffer.h"
 #include <iostream>
 using namespace trantor;
 using namespace drogon;
diff --git a/web_backends/drogon/drogon/lib/inc/http/HttpResponseParser.h b/web_backends/drogon/drogon/lib/inc/http/HttpResponseParser.h
index cde089c..5abaec6 100644
--- a/web_backends/drogon/drogon/lib/inc/http/HttpResponseParser.h
+++ b/web_backends/drogon/drogon/lib/inc/http/HttpResponseParser.h
@@ -16,7 +16,7 @@
 
 #include "../src/impl_forwards.h"
 #include <trantor/net/TcpConnection.h>
-#include <trantor/utils/MsgBuffer.h>
+#include "core/containers/msg_buffer.h"
 #include <trantor/utils/NonCopyable.h>
 #include <list>
 #include <mutex>
diff --git a/web_backends/drogon/drogon/lib/inc/http/HttpUtils.h b/web_backends/drogon/drogon/lib/inc/http/HttpUtils.h
index 4e91e90..a0a4579 100644
--- a/web_backends/drogon/drogon/lib/inc/http/HttpUtils.h
+++ b/web_backends/drogon/drogon/lib/inc/http/HttpUtils.h
@@ -16,7 +16,7 @@
 
 #include "HttpTypes.h"
 #include <drogon/utils/string_view.h>
-#include <trantor/utils/MsgBuffer.h>
+#include "core/containers/msg_buffer.h"
 #include <string>
 
 namespace drogon {
diff --git a/web_backends/drogon/drogon/lib/tests/unittests/MsgBufferTest.cc b/web_backends/drogon/drogon/lib/tests/unittests/MsgBufferTest.cc
index 2b38fc5..be3da42 100644
--- a/web_backends/drogon/drogon/lib/tests/unittests/MsgBufferTest.cc
+++ b/web_backends/drogon/drogon/lib/tests/unittests/MsgBufferTest.cc
@@ -1,5 +1,5 @@
 #include <drogon/drogon_test.h>
-#include <trantor/utils/MsgBuffer.h>
+#include "core/containers/msg_buffer.h"
 #include <iostream>
 #include <string>
 
diff --git a/web_backends/drogon/trantor/net/TcpConnection.h b/web_backends/drogon/trantor/net/TcpConnection.h
index 353d8b2..004830f 100644
--- a/web_backends/drogon/trantor/net/TcpConnection.h
+++ b/web_backends/drogon/trantor/net/TcpConnection.h
@@ -17,7 +17,7 @@
 #include <trantor/net/EventLoop.h>
 #include "core/net/inet_address.h"
 #include <trantor/utils/NonCopyable.h>
-#include <trantor/utils/MsgBuffer.h>
+#include "core/containers/msg_buffer.h"
 #include <trantor/net/callbacks.h>
 #include <memory>
 #include <functional>
diff --git a/web_backends/drogon/trantor/unittests/MsgBufferUnittest.cc b/web_backends/drogon/trantor/unittests/MsgBufferUnittest.cc
index 9addd2c..ff47db9 100644
--- a/web_backends/drogon/trantor/unittests/MsgBufferUnittest.cc
+++ b/web_backends/drogon/trantor/unittests/MsgBufferUnittest.cc
@@ -1,4 +1,4 @@
-#include <trantor/utils/MsgBuffer.h>
+#include "core/containers/msg_buffer.h"
 #include <gtest/gtest.h>
 #include <string>
 #include <iostream>
diff --git a/web_backends/drogon/trantor/utils/MsgBuffer.cc b/web_backends/drogon/trantor/utils/MsgBuffer.cc
index 0ae068b..f099473 100644
--- a/web_backends/drogon/trantor/utils/MsgBuffer.cc
+++ b/web_backends/drogon/trantor/utils/MsgBuffer.cc
@@ -13,7 +13,7 @@
  */
 
 #include <string.h>
-#include <trantor/utils/MsgBuffer.h>
+#include "core/containers/msg_buffer.h"
 #include "core/math/math.h"
 #ifndef _WIN32
 #include <netinet/in.h>