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products/Sources/formale Sprachen/C/Apache/modules/http2/ (Apache Software Stiftung Version 2.4.65^©) Datei vom 29.7.2023 mit Größe 4 kB

Quelle mod_http2.h Sprache: C

/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License.  You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

#ifndef __MOD_HTTP2_H__
#define __MOD_HTTP2_H__

/** The http2_var_lookup() optional function retrieves HTTP2 environment
* variables. */
APR_DECLARE_OPTIONAL_FN(char *,
                        http2_var_lookup, (apr_pool_t *, server_rec *,
                                           conn_rec *, request_rec *,  char *));

/** An optional function which returns non-zero if the given connection
* or its master connection is using HTTP/2. */
APR_DECLARE_OPTIONAL_FN(int,
                        http2_is_h2, (conn_rec *));

APR_DECLARE_OPTIONAL_FN(void,
                        http2_get_num_workers, (server_rec *s,
                                                int *minw, int *max));

#define AP_HTTP2_HAS_GET_POLLFD

/**
* Get a apr_pollfd_t populated for a h2 connection where
* (c->master != NULL) is true and pipes are supported.
* To be used in Apache modules implementing WebSockets in Apache httpd
* versions that do not support the corresponding `ap_get_pollfd_from_conn()`
* function.
* When available, use `ap_get_pollfd_from_conn()` instead of this function.
*
* How it works: pass in a `apr_pollfd_t` which gets populated for
* monitoring the input of connection `c`. If `c` is not a HTTP/2
* stream connection, the function will return `APR_ENOTIMPL`.
* `ptimeout` is optional and, if passed, will get the timeout in effect
*
* On platforms without support for pipes (e.g. Windows), this function
* will return `APR_ENOTIMPL`.
*/
APR_DECLARE_OPTIONAL_FN(apr_status_t,
                        http2_get_pollfd_from_conn,
                        (conn_rec *c, struct apr_pollfd_t *pfd,
                         apr_interval_time_t *ptimeout));

/*******************************************************************************
* START HTTP/2 request engines (DEPRECATED)
******************************************************************************/

/* The following functions were introduced for the experimental mod_proxy_http2
* support, but have been abandoned since.
* They are still declared here for backward compatibility, in case someone
* tries to build an old mod_proxy_http2 against it, but will disappear
* completely sometime in the future.
*/

struct apr_thread_cond_t;
typedef struct h2_req_engine h2_req_engine;
typedef void http2_output_consumed(void *ctx, conn_rec *c, apr_off_t consumed);

typedef apr_status_t http2_req_engine_init(h2_req_engine *engine,
                                           const char *id,
                                           const char *type,
                                           apr_pool_t *pool,
                                           apr_size_t req_buffer_size,
                                           request_rec *r,
                                           http2_output_consumed **pconsumed,
                                           void **pbaton);

APR_DECLARE_OPTIONAL_FN(apr_status_t,
                        http2_req_engine_push, (const char *engine_type,
                                                request_rec *r,
                                                http2_req_engine_init *einit));

APR_DECLARE_OPTIONAL_FN(apr_status_t,
                        http2_req_engine_pull, (h2_req_engine *engine,
                                                apr_read_type_e block,
                                                int capacity,
                                                request_rec **pr));
APR_DECLARE_OPTIONAL_FN(void,
                        http2_req_engine_done, (h2_req_engine *engine,
                                                conn_rec *rconn,
                                                apr_status_t status));

/*******************************************************************************
* END HTTP/2 request engines (DEPRECATED)
******************************************************************************/

#endif

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