nghttp2/src/shrpx_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_UPSTREAM_H
#define SHRPX_UPSTREAM_H
#include "shrpx.h"
#include "shrpx_io_control.h"
namespace shrpx {
class ClientHandler;
class Downstream;
class DownstreamConnection;
class Upstream {
public:
virtual ~Upstream() {}
virtual int on_read() = 0;
virtual int on_write() = 0;
virtual int on_timeout(Downstream *downstream) { return 0; };
virtual int on_downstream_abort_request(Downstream *downstream,
unsigned int status_code) = 0;
virtual int downstream_read(DownstreamConnection *dconn) = 0;
virtual int downstream_write(DownstreamConnection *dconn) = 0;
virtual int downstream_eof(DownstreamConnection *dconn) = 0;
virtual int downstream_error(DownstreamConnection *dconn, int events) = 0;
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virtual ClientHandler *get_client_handler() const = 0;
virtual int on_downstream_header_complete(Downstream *downstream) = 0;
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virtual int on_downstream_body(Downstream *downstream, const uint8_t *data,
size_t len, bool flush) = 0;
virtual int on_downstream_body_complete(Downstream *downstream) = 0;
virtual void on_handler_delete() = 0;
// Called when downstream connection is reset. Currently this is
// only used by Http2Session. If |no_retry| is true, another
// connection attempt using new DownstreamConnection is not allowed.
virtual int on_downstream_reset(bool no_retry) = 0;
virtual void pause_read(IOCtrlReason reason) = 0;
virtual int resume_read(IOCtrlReason reason, Downstream *downstream,
size_t consumed) = 0;
};
} // namespace shrpx
#endif // SHRPX_UPSTREAM_H