nghttp2/src/asio_server_http2_handler.h

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/*
* nghttp2 - HTTP/2 C Library
*
* Copyright (c) 2014 Tatsuhiro Tsujikawa
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef ASIO_SERVER_HTTP2_HANDLER_H
#define ASIO_SERVER_HTTP2_HANDLER_H
#include "nghttp2_config.h"
#include <map>
#include <functional>
#include <string>
#include <boost/array.hpp>
#include <nghttp2/asio_http2_server.h>
namespace nghttp2 {
namespace asio_http2 {
namespace server {
class http2_handler;
class stream;
class serve_mux;
struct callback_guard {
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callback_guard(http2_handler &h);
~callback_guard();
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http2_handler &handler;
};
using connection_write = std::function<void(void)>;
class http2_handler : public std::enable_shared_from_this<http2_handler> {
public:
http2_handler(boost::asio::io_service &io_service, connection_write writefun,
serve_mux &mux);
~http2_handler();
int start();
stream *create_stream(int32_t stream_id);
void close_stream(int32_t stream_id);
stream *find_stream(int32_t stream_id);
void call_on_request(stream &s);
bool should_stop() const;
int start_response(stream &s);
int submit_trailer(stream &s, header_map h);
void stream_error(int32_t stream_id, uint32_t error_code);
void initiate_write();
void enter_callback();
void leave_callback();
void resume(stream &s);
response *push_promise(boost::system::error_code &ec, stream &s,
std::string method, std::string raw_path_query,
header_map h);
void signal_write();
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boost::asio::io_service &io_service();
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const std::string &http_date();
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template <size_t N>
int on_read(const boost::array<uint8_t, N> &buffer, std::size_t len) {
callback_guard cg(*this);
int rv;
rv = nghttp2_session_mem_recv(session_, buffer.data(), len);
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if (rv < 0) {
return -1;
}
return 0;
}
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template <size_t N>
int on_write(boost::array<uint8_t, N> &buffer, std::size_t &len) {
callback_guard cg(*this);
len = 0;
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if (buf_) {
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std::copy_n(buf_, buflen_, std::begin(buffer));
len += buflen_;
buf_ = nullptr;
buflen_ = 0;
}
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for (;;) {
const uint8_t *data;
auto nread = nghttp2_session_mem_send(session_, &data);
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if (nread < 0) {
return -1;
}
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if (nread == 0) {
break;
}
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if (len + nread > buffer.size()) {
buf_ = data;
buflen_ = nread;
break;
}
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std::copy_n(data, nread, std::begin(buffer) + len);
len += nread;
}
return 0;
}
private:
std::map<int32_t, std::shared_ptr<stream>> streams_;
connection_write writefun_;
serve_mux &mux_;
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boost::asio::io_service &io_service_;
nghttp2_session *session_;
const uint8_t *buf_;
std::size_t buflen_;
bool inside_callback_;
time_t tstamp_cached_;
std::string formatted_date_;
};
} // namespace server
} // namespace asio_http2
} // namespace nghttp
#endif // ASIO_SERVER_HTTP2_HANDLER_H