apache/server/error_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 "http_protocol.h"
  18 #include "apr_buckets.h"
  19 #include "apr_strings.h"
  20 #if APR_HAVE_STRINGS_H
  21 #include <strings.h>
  22 #endif
  23
  24 static apr_status_t error_bucket_read(apr_bucket *b, const char **str,
  25                                       apr_size_t *len, apr_read_type_e block)
  26 {
  27     *str = NULL;
  28     *len = 0;
  29     return APR_SUCCESS;
  30 }
  31
  32 static void error_bucket_destroy(void *data)
  33 {
  34     ap_bucket_error *h = data;
  35
  36     if (apr_bucket_shared_destroy(h)) {
  37         apr_bucket_free(h);
  38     }
  39 }
  40
  41 AP_DECLARE(apr_bucket *) ap_bucket_error_make(apr_bucket *b, int error,
  42                                               const char *buf, apr_pool_t *p)
  43 {
  44     ap_bucket_error *h;
  45
  46     h = apr_bucket_alloc(sizeof(*h), b->list);
  47     h->status = error;
  48     h->data = (buf) ? apr_pstrdup(p, buf) : NULL;
  49
  50     b = apr_bucket_shared_make(b, h, 0, 0);
  51     b->type = &ap_bucket_type_error;
  52     return b;
  53 }
  54
  55 AP_DECLARE(apr_bucket *) ap_bucket_error_create(int error, const char *buf,
  56                                                 apr_pool_t *p,
  57                                                 apr_bucket_alloc_t *list)
  58 {
  59     apr_bucket *b = apr_bucket_alloc(sizeof(*b), list);
  60
  61     APR_BUCKET_INIT(b);
  62     b->free = apr_bucket_free;
  63     b->list = list;
  64     return ap_bucket_error_make(b, error, buf, p);
  65 }
  66
  67 AP_DECLARE_DATA const apr_bucket_type_t ap_bucket_type_error = {
  68     "ERROR", 5, APR_BUCKET_METADATA,
  69     error_bucket_destroy,
  70     error_bucket_read,
  71     apr_bucket_setaside_notimpl,
  72     apr_bucket_split_notimpl,
  73     apr_bucket_shared_copy
  74 };