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Change node value's parsing to concatenate instead of duplicate it every time

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Ervin Hegedus 2025-04-28 21:12:32 +02:00
parent 4c043a0889
commit 19b7e98fb6
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GPG Key ID: 5FA5BC3F5EC41F61
1 changed files with 18 additions and 1 deletions
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19
apache2/msc_xml.c
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@ -40,6 +40,10 @@ static void msc_xml_on_start_elementns(
int *new_stack_item = (int *)apr_array_push(xml_parser_state->has_child_stack);
*new_stack_item = 0;
xml_parser_state->depth++;
// set null to the current value
// this is necessary because if there is any text between the tags (new line, etc)
// it will be added to the current value
xml_parser_state->currval = NULL;
// if there is an item before the current one we set that has a child
if (xml_parser_state->depth > 1) {
@ -104,6 +108,7 @@ static void msc_xml_on_end_elementns(
xml_parser_state->currpath = newpath;
xml_parser_state->depth--;
xml_parser_state->currval = NULL;
}
static void msc_xml_on_characters(void *ctx, const xmlChar *ch, int len) {
@ -111,7 +116,19 @@ static void msc_xml_on_characters(void *ctx, const xmlChar *ch, int len) {
modsec_rec * msr = (modsec_rec *)ctx;
msc_xml_parser_state * xml_parser_state = msr->xml->xml_parser_state;
xml_parser_state->currval = apr_pstrndup(msr->mp, (const char *)ch, len);
// libxml2 SAX parser will call this function multiple times
// during the parsing of a single node, if the value has multibyte
// characters, so we need to concatenate the values
xml_parser_state->currval = apr_pstrcat(msr->mp,
((xml_parser_state->currval != NULL) ? xml_parser_state->currval : ""),
apr_pstrndup(msr->mp, (const char *)ch, len),
NULL);
// check if the memory allocation was successful
if (xml_parser_state->currval == NULL) {
msr->xml->xml_error = apr_psprintf(msr->mp, "Failed to allocate memory for XML value.");
xmlStopParser((xmlParserCtxtPtr)msr->xml->parsing_ctx_arg);
}
}