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>
#include <ev.h>
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#include <nghttp2/nghttp2.h>
#include "shrpx_upstream.h"
#include "shrpx_downstream_queue.h"
#include "memchunk.h"
using namespace nghttp2;
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_timeout(Downstream *downstream);
virtual int on_downstream_abort_request(Downstream *downstream,
unsigned int status_code);
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virtual ClientHandler *get_client_handler() const;
virtual int downstream_read(DownstreamConnection *dconn);
virtual int downstream_write(DownstreamConnection *dconn);
virtual int downstream_eof(DownstreamConnection *dconn);
virtual int downstream_error(DownstreamConnection *dconn, int events);
void add_pending_downstream(std::unique_ptr<Downstream> downstream);
void remove_downstream(Downstream *downstream);
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Downstream *find_downstream(int32_t stream_id);
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nghttp2_session *get_http2_session();
int rst_stream(Downstream *downstream, uint32_t error_code);
int terminate_session(uint32_t 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,
size_t consumed);
virtual int on_downstream_header_complete(Downstream *downstream);
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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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virtual void on_handler_delete();
virtual int on_downstream_reset(bool no_retry);
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virtual MemchunkPool *get_mcpool();
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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);
void start_settings_timer();
void stop_settings_timer();
int consume(int32_t stream_id, size_t len);
void log_response_headers(Downstream *downstream,
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const std::vector<nghttp2_nv> &nva) const;
void start_downstream(Downstream *downstream);
void initiate_downstream(std::unique_ptr<Downstream> downstream);
void submit_goaway();
void check_shutdown();
int prepare_push_promise(Downstream *downstream);
int submit_push_promise(const std::string &path, Downstream *downstream);
private:
// must be put before downstream_queue_
std::unique_ptr<HttpsUpstream> pre_upstream_;
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MemchunkPool mcpool_;
DownstreamQueue downstream_queue_;
ev_timer settings_timer_;
ev_timer shutdown_timer_;
ev_prepare prep_;
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ClientHandler *handler_;
nghttp2_session *session_;
const uint8_t *data_pending_;
size_t data_pendinglen_;
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bool flow_control_;
bool shutdown_handled_;
};
} // namespace shrpx
#endif // SHRPX_HTTP2_UPSTREAM_H