forked from boostorg/beast
Vinnie Falco
edeb44617b
The is_deferred nested type is removed from the BodyReader requirements. Performance for sending messages with `file_body` was cut almost in half with is_deferred as `std::true_type` since it caused double the number of socket writes. If the deferred behavior is absolutely necessary, callers can get the same effect by manually sending the headers first. Actions Required: * Callers who need the behavior of is_deferred as `std::true_type` should manually construct a serializer and serialize the header first, followed by the body.
130 lines
3.1 KiB
C++
130 lines
3.1 KiB
C++
//
|
|
// Copyright (c) 2013-2017 Vinnie Falco (vinnie dot falco at gmail dot com)
|
|
//
|
|
// Distributed under the Boost Software License, Version 1.0. (See accompanying
|
|
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
//
|
|
|
|
#ifndef BEAST_HTTP_DYNAMIC_BODY_HPP
|
|
#define BEAST_HTTP_DYNAMIC_BODY_HPP
|
|
|
|
#include <beast/config.hpp>
|
|
#include <beast/core/multi_buffer.hpp>
|
|
#include <beast/http/error.hpp>
|
|
#include <beast/http/message.hpp>
|
|
#include <boost/optional.hpp>
|
|
#include <utility>
|
|
|
|
namespace beast {
|
|
namespace http {
|
|
|
|
/** An HTTP message body represented by a @b DynamicBuffer.
|
|
|
|
Meets the requirements of @b Body.
|
|
*/
|
|
template<class DynamicBuffer>
|
|
struct basic_dynamic_body
|
|
{
|
|
/// The type of the body member when used in a message.
|
|
using value_type = DynamicBuffer;
|
|
|
|
/// Returns the content length of this body in a message.
|
|
static
|
|
std::uint64_t
|
|
size(value_type const& v)
|
|
{
|
|
return v.size();
|
|
}
|
|
|
|
#if BEAST_DOXYGEN
|
|
/// The algorithm to obtain buffers representing the body
|
|
using reader = implementation_defined;
|
|
#else
|
|
class reader
|
|
{
|
|
DynamicBuffer const& body_;
|
|
|
|
public:
|
|
using const_buffers_type =
|
|
typename DynamicBuffer::const_buffers_type;
|
|
|
|
template<bool isRequest, class Fields>
|
|
explicit
|
|
reader(message<isRequest, basic_dynamic_body,
|
|
Fields> const& m, error_code& ec)
|
|
: body_(m.body)
|
|
{
|
|
ec.assign(0, ec.category());
|
|
}
|
|
|
|
boost::optional<std::pair<const_buffers_type, bool>>
|
|
get(error_code& ec)
|
|
{
|
|
ec.assign(0, ec.category());
|
|
return {{body_.data(), false}};
|
|
}
|
|
};
|
|
#endif
|
|
|
|
#if BEAST_DOXYGEN
|
|
/// The algorithm used store buffers in this body
|
|
using writer = implementation_defined;
|
|
#else
|
|
class writer
|
|
{
|
|
value_type& body_;
|
|
|
|
public:
|
|
template<bool isRequest, class Fields>
|
|
explicit
|
|
writer(message<isRequest, basic_dynamic_body, Fields>& msg,
|
|
boost::optional<std::uint64_t> const&,
|
|
error_code& ec)
|
|
: body_(msg.body)
|
|
{
|
|
ec.assign(0, ec.category());
|
|
}
|
|
|
|
template<class ConstBufferSequence>
|
|
void
|
|
put(ConstBufferSequence const& buffers,
|
|
error_code& ec)
|
|
{
|
|
using boost::asio::buffer_copy;
|
|
using boost::asio::buffer_size;
|
|
boost::optional<typename
|
|
DynamicBuffer::mutable_buffers_type> b;
|
|
try
|
|
{
|
|
b.emplace(body_.prepare(
|
|
buffer_size(buffers)));
|
|
}
|
|
catch(std::length_error const&)
|
|
{
|
|
ec = error::buffer_overflow;
|
|
return;
|
|
}
|
|
ec.assign(0, ec.category());
|
|
body_.commit(buffer_copy(*b, buffers));
|
|
}
|
|
|
|
void
|
|
finish(error_code& ec)
|
|
{
|
|
ec.assign(0, ec.category());
|
|
}
|
|
};
|
|
#endif
|
|
};
|
|
|
|
/** A dynamic message body represented by a @ref multi_buffer
|
|
|
|
Meets the requirements of @b Body.
|
|
*/
|
|
using dynamic_body = basic_dynamic_body<multi_buffer>;
|
|
|
|
} // http
|
|
} // beast
|
|
|
|
#endif
|