server/eor_bucket.c

   1 /* Licensed to the Apache Software Foundation (ASF) under one or more
   2  * contributor license agreements.  See the NOTICE file distributed with
   3  * this work for additional information regarding copyright ownership.
   4  * The ASF licenses this file to You under the Apache License, Version 2.0
   5  * (the "License"); you may not use this file except in compliance with
   6  * the License.  You may obtain a copy of the License at
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include "httpd.h"
  18 #include "http_request.h"
  19 #include "http_protocol.h"
  20 #include "scoreboard.h"
  21
  22 static apr_status_t eor_bucket_cleanup(void *data)
  23 {
  24     apr_bucket *b = (apr_bucket *)data;
  25     request_rec *r = (request_rec *)b->data;
  26
  27     if (r != NULL) {
  28         /*
  29          * If eor_bucket_destroy is called after us, this prevents
  30          * eor_bucket_destroy from trying to destroy the pool again.
  31          */
  32         b->data = NULL;
  33         /* Update child status and log the transaction */
  34         ap_update_child_status(r->connection->sbh, SERVER_BUSY_LOG, r);
  35         ap_run_log_transaction(r);
  36         if (ap_extended_status) {
  37             ap_increment_counts(r->connection->sbh, r);
  38         }
  39     }
  40     return APR_SUCCESS;
  41 }
  42
  43 static apr_status_t eor_bucket_read(apr_bucket *b, const char **str,
  44                                     apr_size_t *len, apr_read_type_e block)
  45 {
  46     *str = NULL;
  47     *len = 0;
  48     return APR_SUCCESS;
  49 }
  50
  51 AP_DECLARE(apr_bucket *) ap_bucket_eor_make(apr_bucket *b, request_rec *r)
  52 {
  53     b->length      = 0;
  54     b->start       = 0;
  55     b->data        = r;
  56     b->type        = &ap_bucket_type_eor;
  57
  58     return b;
  59 }
  60
  61 AP_DECLARE(apr_bucket *) ap_bucket_eor_create(apr_bucket_alloc_t *list,
  62                                               request_rec *r)
  63 {
  64     apr_bucket *b = apr_bucket_alloc(sizeof(*b), list);
  65
  66     APR_BUCKET_INIT(b);
  67     b->free = apr_bucket_free;
  68     b->list = list;
  69     if (r) {
  70         /*
  71          * Register a cleanup for the request pool as the eor bucket could
  72          * have been allocated from a different pool then the request pool
  73          * e.g. the parent pool of the request pool. In this case
  74          * eor_bucket_destroy might be called at a point of time when the
  75          * request pool had been already destroyed.
  76          */
  77         apr_pool_cleanup_register(r->pool, (void *)b, eor_bucket_cleanup,
  78                                   apr_pool_cleanup_null);
  79     }
  80     return ap_bucket_eor_make(b, r);
  81 }
  82
  83 static void eor_bucket_destroy(void *data)
  84 {
  85     request_rec *r = (request_rec *)data;
  86
  87     if (r) {
  88         /* eor_bucket_cleanup will be called when the pool gets destroyed */
  89         apr_pool_destroy(r->pool);
  90     }
  91 }
  92
  93 AP_DECLARE_DATA const apr_bucket_type_t ap_bucket_type_eor = {
  94     "EOR", 5, APR_BUCKET_METADATA,
  95     eor_bucket_destroy,
  96     eor_bucket_read,
  97     apr_bucket_setaside_noop,
  98     apr_bucket_split_notimpl,
  99     apr_bucket_simple_copy
 100 };
 101