From afea5f9539cbf1eeaa85ec77d79eb2f59724f470 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 09:34:15 +0200 Subject: Adding upstream version 1.52.0. Signed-off-by: Daniel Baumann --- src/shrpx_upstream.h | 112 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 112 insertions(+) create mode 100644 src/shrpx_upstream.h (limited to 'src/shrpx_upstream.h') diff --git a/src/shrpx_upstream.h b/src/shrpx_upstream.h new file mode 100644 index 0000000..3da62c9 --- /dev/null +++ b/src/shrpx_upstream.h @@ -0,0 +1,112 @@ +/* + * 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" +#include "memchunk.h" + +using namespace nghttp2; + +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; + // Called when the current request is aborted without forwarding it + // to backend, and it should be redirected to https URI. + virtual int + on_downstream_abort_request_with_https_redirect(Downstream *downstream) = 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; + virtual ClientHandler *get_client_handler() const = 0; + + virtual int on_downstream_header_complete(Downstream *downstream) = 0; + 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 for |downstream| 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(Downstream *downstream, bool no_retry) = 0; + + virtual void pause_read(IOCtrlReason reason) = 0; + virtual int resume_read(IOCtrlReason reason, Downstream *downstream, + size_t consumed) = 0; + virtual int send_reply(Downstream *downstream, const uint8_t *body, + size_t bodylen) = 0; + + // Starts server push. The |downstream| is an associated stream for + // the pushed resource. This function returns 0 if it succeeds, + // otherwise -1. + virtual int initiate_push(Downstream *downstream, const StringRef &uri) = 0; + + // Fills response data in |iov| whose capacity is |iovcnt|. Returns + // the number of iovs filled. + virtual int response_riovec(struct iovec *iov, int iovcnt) const = 0; + virtual void response_drain(size_t n) = 0; + virtual bool response_empty() const = 0; + + // Called when PUSH_PROMISE was started in downstream. The + // associated downstream is given as |downstream|. The promised + // stream ID is given as |promised_stream_id|. If upstream supports + // server push for the corresponding upstream connection, it should + // return Downstream object for pushed stream. Otherwise, returns + // nullptr. + virtual Downstream * + on_downstream_push_promise(Downstream *downstream, + int32_t promised_stream_id) = 0; + // Called when PUSH_PROMISE frame was completely received in + // downstream. The associated downstream is given as |downstream|. + // This function returns 0 if it succeeds, or -1. + virtual int + on_downstream_push_promise_complete(Downstream *downstream, + Downstream *promised_downstream) = 0; + // Returns true if server push is enabled in upstream connection. + virtual bool push_enabled() const = 0; + // Cancels promised downstream. This function is called when + // PUSH_PROMISE for |promised_downstream| is not submitted to + // upstream session. + virtual void cancel_premature_downstream(Downstream *promised_downstream) = 0; +}; + +} // namespace shrpx + +#endif // SHRPX_UPSTREAM_H -- cgit v1.2.3