Last active
August 30, 2022 15:51
-
-
Save klemens-morgenstern/8fee570f3291d6f566997a5bb6f50568 to your computer and use it in GitHub Desktop.
a hack json_body
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
// | |
// Copyright (c) 2022 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) | |
// | |
// Official repository: https://github.com/boostorg/beast | |
// | |
//------------------------------------------------------------------------------ | |
// | |
// Example: JSON body | |
// | |
//------------------------------------------------------------------------------ | |
#ifndef BOOST_BEAST_EXAMPLE_JSON_BODY | |
#define BOOST_BEAST_EXAMPLE_JSON_BODY | |
#include <boost/json.hpp> | |
#include <boost/json/stream_parser.hpp> | |
#include <boost/json/monotonic_resource.hpp> | |
#include <boost/beast/http.hpp> | |
#include <boost/asio/buffer.hpp> | |
namespace json = boost::json; | |
struct json_body | |
{ | |
using value_type = json::value; | |
struct writer | |
{ | |
using const_buffers_type = boost::asio::const_buffer; | |
template<bool isRequest, class Fields> | |
writer(boost::beast::http::header<isRequest, Fields> const& h, | |
value_type const& body) | |
{ | |
serializer.reset(&body); | |
} | |
void | |
init(boost::system::error_code& ec) | |
{ | |
// The specification requires this to indicate "no error" | |
ec = {}; | |
} | |
boost::optional<std::pair<const_buffers_type, bool>> | |
get(boost::system::error_code& ec) | |
{ | |
ec = {}; | |
const auto len = serializer.read(buffer, sizeof(buffer)); | |
return std::make_pair( | |
boost::asio::const_buffer(len.data(), len.size()), | |
!serializer.done()); | |
} | |
private: | |
json::serializer serializer; | |
// half of the probably networking buffer, let's leave some space for headers | |
char buffer[32768]; | |
}; | |
struct reader | |
{ | |
template<bool isRequest, class Fields> | |
reader(boost::beast::http::header<isRequest, Fields>& h, value_type& body) | |
: body(body) | |
{ | |
} | |
void | |
init( | |
boost::optional<std::uint64_t> const& content_length, | |
boost::system::error_code& ec) | |
{ | |
// The specification requires this to indicate "no error" | |
if (content_length) | |
parser.reset(json::make_shared_resource<json::monotonic_resource>(*content_length)); | |
ec = {}; | |
} | |
template<class ConstBufferSequence> | |
std::size_t | |
put(ConstBufferSequence const& buffers, boost::system::error_code& ec) | |
{ | |
// The specification requires this to indicate "no error" | |
ec = {}; | |
return parser.write_some( | |
static_cast<const char*>(buffers.data()), buffers.size(), ec); | |
} | |
void | |
finish(boost::system::error_code& ec) | |
{ | |
// The specification requires this to indicate "no error" | |
ec = {}; | |
if (parser.done()) | |
body = parser.release(); | |
else | |
ec = boost::json::error::incomplete; | |
} | |
private: | |
json::stream_parser parser; | |
value_type& body; | |
}; | |
}; | |
#endif |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment