1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
/* 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.
*/
#include "apr_xml.h"
#include "httpd.h"
#include "http_protocol.h"
#include "http_log.h"
#include "http_core.h"
#include "util_charset.h"
#include "util_xml.h"
/* used for reading input blocks */
#define READ_BLOCKSIZE 2048
/* we know core's module_index is 0 */
#undef APLOG_MODULE_INDEX
#define APLOG_MODULE_INDEX AP_CORE_MODULE_INDEX
AP_DECLARE(int) ap_xml_parse_input(request_rec * r, apr_xml_doc **pdoc)
{
apr_xml_parser *parser;
apr_bucket_brigade *brigade;
int seen_eos;
apr_status_t status;
char errbuf[200];
apr_size_t total_read = 0;
apr_size_t limit_xml_body = ap_get_limit_xml_body(r);
int result = HTTP_BAD_REQUEST;
parser = apr_xml_parser_create(r->pool);
brigade = apr_brigade_create(r->pool, r->connection->bucket_alloc);
seen_eos = 0;
total_read = 0;
do {
apr_bucket *bucket;
/* read the body, stuffing it into the parser */
status = ap_get_brigade(r->input_filters, brigade,
AP_MODE_READBYTES, APR_BLOCK_READ,
READ_BLOCKSIZE);
if (status != APR_SUCCESS) {
result = ap_map_http_request_error(status, HTTP_BAD_REQUEST);
goto read_error;
}
for (bucket = APR_BRIGADE_FIRST(brigade);
bucket != APR_BRIGADE_SENTINEL(brigade);
bucket = APR_BUCKET_NEXT(bucket))
{
const char *data;
apr_size_t len;
if (APR_BUCKET_IS_EOS(bucket)) {
seen_eos = 1;
break;
}
if (APR_BUCKET_IS_METADATA(bucket)) {
continue;
}
status = apr_bucket_read(bucket, &data, &len, APR_BLOCK_READ);
if (status != APR_SUCCESS) {
goto read_error;
}
total_read += len;
if (limit_xml_body && total_read > limit_xml_body) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00539)
"XML request body is larger than the configured "
"limit of %lu", (unsigned long)limit_xml_body);
result = HTTP_REQUEST_ENTITY_TOO_LARGE;
goto read_error;
}
status = apr_xml_parser_feed(parser, data, len);
if (status) {
goto parser_error;
}
}
apr_brigade_cleanup(brigade);
} while (!seen_eos);
apr_brigade_destroy(brigade);
/* tell the parser that we're done */
status = apr_xml_parser_done(parser, pdoc);
if (status) {
/* Some parsers are stupid and return an error on blank documents. */
if (!total_read) {
*pdoc = NULL;
return OK;
}
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00540)
"XML parser error (at end). status=%d", status);
return HTTP_BAD_REQUEST;
}
#if APR_CHARSET_EBCDIC
apr_xml_parser_convert_doc(r->pool, *pdoc, ap_hdrs_from_ascii);
#endif
return OK;
parser_error:
(void) apr_xml_parser_geterror(parser, errbuf, sizeof(errbuf));
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00541)
"XML Parser Error: %s", errbuf);
/* FALLTHRU */
read_error:
/* make sure the parser is terminated */
(void) apr_xml_parser_done(parser, NULL);
apr_brigade_destroy(brigade);
/* Apache will supply a default error, plus the error log above. */
return result;
}
|
