diff options
Diffstat (limited to 'server/util_xml.c')
| -rw-r--r-- | server/util_xml.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/server/util_xml.c b/server/util_xml.c new file mode 100644 index 0000000..22806fa --- /dev/null +++ b/server/util_xml.c @@ -0,0 +1,140 @@ +/* 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 (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; +} |