feat: build proect for restproxy
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zhangsz
205
proxy_c/third-lib/libevent/evrpc-internal.h
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205
proxy_c/third-lib/libevent/evrpc-internal.h
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/*
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* Copyright (c) 2006-2007 Niels Provos <provos@citi.umich.edu>
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* Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef EVRPC_INTERNAL_H_INCLUDED_
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#define EVRPC_INTERNAL_H_INCLUDED_
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#include "event2/http.h"
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#include "http-internal.h"
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struct evrpc;
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struct evrpc_request_wrapper;
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#define EVRPC_URI_PREFIX "/.rpc."
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struct evrpc_hook {
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TAILQ_ENTRY(evrpc_hook) next;
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/* returns EVRPC_TERMINATE; if the rpc should be aborted.
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* a hook is is allowed to rewrite the evbuffer
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*/
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int (*process)(void *, struct evhttp_request *,
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struct evbuffer *, void *);
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void *process_arg;
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};
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TAILQ_HEAD(evrpc_hook_list, evrpc_hook);
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/*
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* this is shared between the base and the pool, so that we can reuse
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* the hook adding functions; we alias both evrpc_pool and evrpc_base
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* to this common structure.
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*/
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struct evrpc_hook_ctx;
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TAILQ_HEAD(evrpc_pause_list, evrpc_hook_ctx);
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struct evrpc_hooks_ {
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/* hooks for processing outbound and inbound rpcs */
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struct evrpc_hook_list in_hooks;
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struct evrpc_hook_list out_hooks;
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struct evrpc_pause_list pause_requests;
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};
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#define input_hooks common.in_hooks
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#define output_hooks common.out_hooks
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#define paused_requests common.pause_requests
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struct evrpc_base {
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struct evrpc_hooks_ common;
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/* the HTTP server under which we register our RPC calls */
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struct evhttp* http_server;
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/* a list of all RPCs registered with us */
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TAILQ_HEAD(evrpc_list, evrpc) registered_rpcs;
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};
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struct evrpc_req_generic;
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void evrpc_reqstate_free_(struct evrpc_req_generic* rpc_state);
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/* A pool for holding evhttp_connection objects */
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struct evrpc_pool {
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struct evrpc_hooks_ common;
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struct event_base *base;
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struct evconq connections;
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int timeout;
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TAILQ_HEAD(evrpc_requestq, evrpc_request_wrapper) (requests);
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};
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struct evrpc_hook_ctx {
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TAILQ_ENTRY(evrpc_hook_ctx) next;
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void *ctx;
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void (*cb)(void *, enum EVRPC_HOOK_RESULT);
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};
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struct evrpc_meta {
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TAILQ_ENTRY(evrpc_meta) next;
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char *key;
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void *data;
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size_t data_size;
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};
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TAILQ_HEAD(evrpc_meta_list, evrpc_meta);
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struct evrpc_hook_meta {
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struct evrpc_meta_list meta_data;
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struct evhttp_connection *evcon;
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};
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/* allows association of meta data with a request */
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static void evrpc_hook_associate_meta_(struct evrpc_hook_meta **pctx,
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struct evhttp_connection *evcon);
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/* creates a new meta data store */
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static struct evrpc_hook_meta *evrpc_hook_meta_new_(void);
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/* frees the meta data associated with a request */
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static void evrpc_hook_context_free_(struct evrpc_hook_meta *ctx);
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/* the server side of an rpc */
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/* We alias the RPC specific structs to this voided one */
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struct evrpc_req_generic {
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/*
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* allows association of meta data via hooks - needs to be
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* synchronized with evrpc_request_wrapper
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*/
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struct evrpc_hook_meta *hook_meta;
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/* the unmarshaled request object */
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void *request;
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/* the empty reply object that needs to be filled in */
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void *reply;
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/*
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* the static structure for this rpc; that can be used to
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* automatically unmarshal and marshal the http buffers.
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*/
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struct evrpc *rpc;
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/*
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* the http request structure on which we need to answer.
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*/
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struct evhttp_request* http_req;
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/*
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* Temporary data store for marshaled data
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*/
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struct evbuffer* rpc_data;
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};
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/* the client side of an rpc request */
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struct evrpc_request_wrapper {
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/*
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* allows association of meta data via hooks - needs to be
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* synchronized with evrpc_req_generic.
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*/
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struct evrpc_hook_meta *hook_meta;
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TAILQ_ENTRY(evrpc_request_wrapper) next;
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/* pool on which this rpc request is being made */
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struct evrpc_pool *pool;
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/* connection on which the request is being sent */
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struct evhttp_connection *evcon;
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/* the actual request */
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struct evhttp_request *req;
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/* event for implementing request timeouts */
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struct event ev_timeout;
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/* the name of the rpc */
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char *name;
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/* callback */
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void (*cb)(struct evrpc_status*, void *request, void *reply, void *arg);
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void *cb_arg;
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void *request;
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void *reply;
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/* unmarshals the buffer into the proper request structure */
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void (*request_marshal)(struct evbuffer *, void *);
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/* removes all stored state in the reply */
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void (*reply_clear)(void *);
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/* marshals the reply into a buffer */
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int (*reply_unmarshal)(void *, struct evbuffer*);
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};
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#endif /* EVRPC_INTERNAL_H_INCLUDED_ */
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