Fix libxml2 related deprecated issues

src/operators/validate_dtd.cc

@@ -33,12 +33,6 @@ bool ValidateDTD::init(const std::string &file, std::string *error) {
         return false;
     }
 
-    xmlThrDefSetGenericErrorFunc(NULL,
-        null_error);
-
-    xmlSetGenericErrorFunc(NULL,
-        null_error);
-
     return true;
 }
 

src/operators/validate_dtd.h

@@ -78,9 +78,6 @@ class ValidateDTD : public Operator {
     }
 
 
-    static void null_error(void *, const char *, ...) { // cppcheck-suppress[constParameterPointer,constParameterCallback]
-    }
-
  private:
     std::string m_resource;
 #endif

src/operators/validate_schema.cc

@@ -71,12 +71,6 @@ bool ValidateSchema::evaluate(Transaction *transaction,
         (xmlSchemaValidityErrorFunc)error_load,
         (xmlSchemaValidityWarningFunc)warn_load, &m_err);
 
-    xmlThrDefSetGenericErrorFunc(parserCtx,
-        null_error);
-
-    xmlSetGenericErrorFunc(parserCtx,
-        null_error);
-
     xmlSchemaPtr schema = xmlSchemaParse(parserCtx);
     if (schema == NULL) {
         std::stringstream err;

src/operators/validate_schema.h

@@ -75,8 +75,6 @@ class ValidateSchema : public Operator {
         va_end(args);
     }
 
-    static void null_error(void *, const char *, ...) { // cppcheck-suppress[constParameterPointer,constParameterCallback]
-    }
 
     template<typename Pred>
     static void callback_func(void *ctx, Pred pred, const char *base_msg, const char *msg, va_list args) {

src/request_body_processor/xml.cc

@@ -274,7 +274,6 @@ bool XML::processChunk(const char *buf, unsigned int size,
     if (m_data.parsing_ctx != NULL &&
         m_transaction->m_secXMLParseXmlIntoArgs
         != RulesSetProperties::OnlyArgsConfigXMLParseXmlIntoArgs) {
-        xmlSetGenericErrorFunc(m_data.parsing_ctx, null_error);
         xmlParseChunk(m_data.parsing_ctx, buf, size, 0);
         m_data.xml_parser_state->parsing_ctx_arg = m_data.parsing_ctx_arg;
         if (m_data.parsing_ctx->wellFormed != 1) {
@@ -292,7 +291,6 @@ bool XML::processChunk(const char *buf, unsigned int size,
             m_transaction->m_secXMLParseXmlIntoArgs
               == RulesSetProperties::TrueConfigXMLParseXmlIntoArgs)
         ) {
-        xmlSetGenericErrorFunc(m_data.parsing_ctx_arg, null_error);
         xmlParseChunk(m_data.parsing_ctx_arg, buf, size, 0);
         if (m_data.parsing_ctx_arg->wellFormed != 1) {
             error->assign("XML: Failed to parse document for ARGS.");

src/request_body_processor/xml.h

@@ -16,7 +16,7 @@
 #ifdef WITH_LIBXML2
 #include <libxml/xmlschemas.h>
 #include <libxml/xpath.h>
-#include <libxml/SAX.h>
+#include <libxml/SAX2.h>
 #endif
 
 #include <string>
@@ -93,10 +93,6 @@ class XML {
     static xmlParserInputBufferPtr unloadExternalEntity(const char *URI,
         xmlCharEncoding enc);
 
-    static void null_error(void *ctx, const char *msg, ...) { // cppcheck-suppress[constParameterPointer,constParameterCallback]
-    }
-
-
     xml_data m_data;
 
  private: