2 * nghttp2 - HTTP/2 C Library
4 * Copyright (c) 2012 Tatsuhiro Tsujikawa
6 * Permission is hereby granted, free of charge, to any person obtaining
7 * a copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sublicense, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice shall be
15 * included in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 #ifndef SHRPX_UPSTREAM_H
26 #define SHRPX_UPSTREAM_H
29 #include "shrpx_io_control.h"
35 class DownstreamConnection;
39 virtual ~Upstream() {}
40 virtual int on_read() = 0;
41 virtual int on_write() = 0;
42 virtual int on_timeout(Downstream *downstream) { return 0; };
43 virtual int on_downstream_abort_request(Downstream *downstream,
44 unsigned int status_code) = 0;
45 virtual int downstream_read(DownstreamConnection *dconn) = 0;
46 virtual int downstream_write(DownstreamConnection *dconn) = 0;
47 virtual int downstream_eof(DownstreamConnection *dconn) = 0;
48 virtual int downstream_error(DownstreamConnection *dconn, int events) = 0;
49 virtual ClientHandler *get_client_handler() const = 0;
51 virtual int on_downstream_header_complete(Downstream *downstream) = 0;
52 virtual int on_downstream_body(Downstream *downstream, const uint8_t *data,
53 size_t len, bool flush) = 0;
54 virtual int on_downstream_body_complete(Downstream *downstream) = 0;
56 virtual void on_handler_delete() = 0;
57 // Called when downstream connection is reset. Currently this is
58 // only used by Http2Session. If |no_retry| is true, another
59 // connection attempt using new DownstreamConnection is not allowed.
60 virtual int on_downstream_reset(bool no_retry) = 0;
62 virtual void pause_read(IOCtrlReason reason) = 0;
63 virtual int resume_read(IOCtrlReason reason, Downstream *downstream,
69 #endif // SHRPX_UPSTREAM_H