/**
* Finalise XML parsing.
*/
int xml_complete(modsec_rec *msr, char **error_msg) {
if (error_msg == NULL) return -1;
*error_msg = NULL;
/* Only if we have a context, meaning we've done some work. */
if (msr->xml->parsing_ctx != NULL) {
/* This is how we signalise the end of parsing to libxml. */
xmlParseChunk(msr->xml->parsing_ctx, NULL, 0, 1);
/* Preserve the results for our reference. */
msr->xml->well_formed = msr->xml->parsing_ctx->wellFormed;
msr->xml->doc = msr->xml->parsing_ctx->myDoc;
/* Clean up everything else. */
xmlFreeParserCtxt(msr->xml->parsing_ctx);
msr->xml->parsing_ctx = NULL;
msr_log(msr, 4, "XML: Parsing complete (well_formed %u).", msr->xml->well_formed);
if (msr->xml->well_formed != 1) {
*error_msg = ngx_pstrndup(msr->mp, "XML: Failed parsing document.");
return -1;
}
}
return 1;
}
/**
* Feed one chunk of data to the XML parser.
*/
int xml_process_chunk(modsec_rec *msr, const char *buf, unsigned int size, char **error_msg) {
if (error_msg == NULL) return -1;
*error_msg = NULL;
/* We want to initialise our parsing context here, to
* enable us to pass it the first chunk of data so that
* it can attempt to auto-detect the encoding.
*/
if (msr->xml->parsing_ctx == NULL) {
/* First invocation. */
msr_log(msr, 4, "XML: Initialising parser.");
/* NOTE When Sax interface is used libxml will not
* create the document object, but we need it.
msr->xml->sax_handler = (xmlSAXHandler *)ngx_pcalloc(msr->mp, sizeof(xmlSAXHandler));
if (msr->xml->sax_handler == NULL) return -1;
msr->xml->sax_handler->error = xml_receive_sax_error;
msr->xml->sax_handler->warning = xml_receive_sax_error;
msr->xml->parsing_ctx = xmlCreatePushParserCtxt(msr->xml->sax_handler, msr,
buf, size, "body.xml");
*/
msr->xml->parsing_ctx = xmlCreatePushParserCtxt(NULL, NULL, buf, size, "body.xml");
if (msr->xml->parsing_ctx == NULL) {
*error_msg = ngx_pstrndup(msr->mp, "XML: Failed to create parsing context.");
return -1;
}
} else {
/* Not a first invocation. */
xmlParseChunk(msr->xml->parsing_ctx, buf, size, 0);
if (msr->xml->parsing_ctx->wellFormed != 1) {
*error_msg = ngx_pstrndup(msr->mp, "XML: Failed parsing document.");
return -1;
}
}
return 1;
}
char* sf_var_exp(sf_vartable_t* handle, char *varexp, ngx_pool_t *pool)
{
//char *dststr = (char*)sf_calloc(SF_MAX_VAR_SIZE);
char *dststr = (char*)ngx_pcalloc(pool, SF_MAX_VAR_SIZE);
char *c = varexp;
char *d = dststr;
while(*c != '\0')
{
if (*c=='(' && *(c+1)=='$')
{
char *p = c+1;
while(*p && *p!=')')
{
p++;
}
if (*p == ')')
{
char *name;
sf_vartable_t *v;
name = ngx_pstrndup(pool, c+1, p-c-1);
v = sf_var_search(handle, name);
ngx_pfree(pool, name);
if (v)
{
size_t len = strlen(v->value);
if (d+len <dststr +SF_MAX_VAR_SIZE)
{
strncpy(d, v->value, len);
d = d + len;
}
c= p + 1;
}
else
{
if ((d + (p -c + 1)) < (dststr +SF_MAX_VAR_SIZE))
{
strncpy(d, c, p-c+1);
d = d + (p-c+1);
}
c = p + 1;
}
} else
{
strcpy(d, c);
d = d+(p-c);
c = p;
}
}
else
*d++ = *c++;
}
return dststr;
#if 0
/* ÁÙʱ */
sf_vartable_t *v = sf_var_search(handle, varexp);
if (v)
{
return sf_strdup(v->value);
}
else
{
return sf_strdup("");
}
#endif
}
