nghttp2/src/shrpx_http2_upstream.h

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/*
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* nghttp2 - HTTP/2 C Library
*
* Copyright (c) 2012 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 SHRPX_HTTP2_UPSTREAM_H
#define SHRPX_HTTP2_UPSTREAM_H
#include "shrpx.h"
#include <memory>
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#include <nghttp2/nghttp2.h>
#include "shrpx_upstream.h"
#include "shrpx_downstream_queue.h"
namespace shrpx {
class ClientHandler;
class HttpsUpstream;
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class Http2Upstream : public Upstream {
public:
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Http2Upstream(ClientHandler *handler);
virtual ~Http2Upstream();
virtual int on_read();
virtual int on_write();
virtual int on_event();
virtual int on_downstream_abort_request(Downstream *downstream,
unsigned int status_code);
int send();
virtual ClientHandler* get_client_handler() const;
virtual bufferevent_data_cb get_downstream_readcb();
virtual bufferevent_data_cb get_downstream_writecb();
virtual bufferevent_event_cb get_downstream_eventcb();
void add_downstream(Downstream *downstream);
void remove_downstream(Downstream *downstream);
Downstream* find_downstream(int32_t stream_id);
nghttp2_session* get_http2_session();
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int rst_stream(Downstream *downstream, nghttp2_error_code error_code);
// To send WINDOW_UPDATE for a connection, specify nullptr to
// |downstream|.
int window_update(Downstream *downstream, int32_t window_size_increment);
int terminate_session(nghttp2_error_code error_code);
int error_reply(Downstream *downstream, unsigned int status_code);
virtual void pause_read(IOCtrlReason reason);
virtual int resume_read(IOCtrlReason reason, Downstream *downstream);
virtual int on_downstream_header_complete(Downstream *downstream);
virtual int on_downstream_body(Downstream *downstream,
const uint8_t *data, size_t len, bool flush);
virtual int on_downstream_body_complete(Downstream *downstream);
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bool get_flow_control() const;
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// Perform HTTP/2 upgrade from |upstream|. On success, this object
// takes ownership of the |upstream|. This function returns 0 if it
// succeeds, or -1.
int upgrade_upstream(HttpsUpstream *upstream);
int start_settings_timer();
void stop_settings_timer();
int handle_ign_data_chunk(size_t len);
private:
DownstreamQueue downstream_queue_;
std::unique_ptr<HttpsUpstream> pre_upstream_;
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ClientHandler *handler_;
nghttp2_session *session_;
event *settings_timerev_;
// Received DATA frame size while it is not sent to backend before
// any connection-level WINDOW_UPDATE
int32_t recv_ign_window_size_;
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bool flow_control_;
};
} // namespace shrpx
#endif // SHRPX_HTTP2_UPSTREAM_H