Class: Nokogiri::XML::RelaxNG

Inherits:
NokogiriXmlSchema
  • Object
show all
Defined in:
lib/nokogiri/xml/relax_ng.rb,
ext/nokogiri/xml_relax_ng.c

Overview

Nokogiri::XML::RelaxNG is used for validating XML against a RelaxNG schema.

Synopsis

Validate an XML document against a RelaxNG schema. Loop over the errors that are returned and print them out:

schema  = Nokogiri::XML::RelaxNG(File.open(ADDRESS_SCHEMA_FILE))
doc     = Nokogiri::XML(File.open(ADDRESS_XML_FILE))

schema.validate(doc).each do |error|
  puts error.message
end

The list of errors are Nokogiri::XML::SyntaxError objects.

NOTE: RelaxNG input is always treated as TRUSTED documents, meaning that they will cause the underlying parsing libraries to access network resources. This is counter to Nokogiri’s “untrusted by default” security policy, but is a limitation of the underlying libraries.

Class Method Summary collapse

Class Method Details

.from_document(doc) ⇒ Object

Create a new RelaxNG schema from the Nokogiri::XML::Document doc



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# File 'ext/nokogiri/xml_relax_ng.c', line 112

static VALUE from_document(int argc, VALUE *argv, VALUE klass)
{
  VALUE document;
  VALUE parse_options;
  xmlDocPtr doc;
  xmlRelaxNGParserCtxtPtr ctx;
  xmlRelaxNGPtr schema;
  VALUE errors;
  VALUE rb_schema;
  int scanned_args = 0;

  scanned_args = rb_scan_args(argc, argv, "11", &document, &parse_options);

  Data_Get_Struct(document, xmlDoc, doc);
  doc = doc->doc; /* In case someone passes us a node. ugh. */

  if (scanned_args == 1) {
    parse_options = rb_const_get(rb_const_get(mNokogiriXml, rb_intern("ParseOptions")), rb_intern("DEFAULT_SCHEMA"));
  }

  ctx = xmlRelaxNGNewDocParserCtxt(doc);

  errors = rb_ary_new();
  xmlSetStructuredErrorFunc((void *)errors, Nokogiri_error_array_pusher);

#ifdef HAVE_XMLRELAXNGSETPARSERSTRUCTUREDERRORS
  xmlRelaxNGSetParserStructuredErrors(
    ctx,
    Nokogiri_error_array_pusher,
    (void *)errors
  );
#endif

  schema = xmlRelaxNGParse(ctx);

  xmlSetStructuredErrorFunc(NULL, NULL);
  xmlRelaxNGFreeParserCtxt(ctx);

  if(NULL == schema) {
    xmlErrorPtr error = xmlGetLastError();
    if(error)
      Nokogiri_error_raise(NULL, error);
    else
      rb_raise(rb_eRuntimeError, "Could not parse document");

    return Qnil;
  }

  rb_schema = Data_Wrap_Struct(klass, 0, dealloc, schema);
  rb_iv_set(rb_schema, "@errors", errors);
  rb_iv_set(rb_schema, "@parse_options", parse_options);

  return rb_schema;
}

.read_memory(string) ⇒ Object

Create a new RelaxNG from the contents of string



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# File 'ext/nokogiri/xml_relax_ng.c', line 56

static VALUE read_memory(int argc, VALUE *argv, VALUE klass)
{
  VALUE content;
  VALUE parse_options;
  xmlRelaxNGParserCtxtPtr ctx;
  xmlRelaxNGPtr schema;
  VALUE errors;
  VALUE rb_schema;
  int scanned_args = 0;

  scanned_args = rb_scan_args(argc, argv, "11", &content, &parse_options);
  if (scanned_args == 1) {
    parse_options = rb_const_get(rb_const_get(mNokogiriXml, rb_intern("ParseOptions")), rb_intern("DEFAULT_SCHEMA"));
  }

  ctx = xmlRelaxNGNewMemParserCtxt((const char *)StringValuePtr(content), (int)RSTRING_LEN(content));

  errors = rb_ary_new();
  xmlSetStructuredErrorFunc((void *)errors, Nokogiri_error_array_pusher);

#ifdef HAVE_XMLRELAXNGSETPARSERSTRUCTUREDERRORS
  xmlRelaxNGSetParserStructuredErrors(
    ctx,
    Nokogiri_error_array_pusher,
    (void *)errors
  );
#endif

  schema = xmlRelaxNGParse(ctx);

  xmlSetStructuredErrorFunc(NULL, NULL);
  xmlRelaxNGFreeParserCtxt(ctx);

  if(NULL == schema) {
    xmlErrorPtr error = xmlGetLastError();
    if(error)
      Nokogiri_error_raise(NULL, error);
    else
      rb_raise(rb_eRuntimeError, "Could not parse document");

    return Qnil;
  }

  rb_schema = Data_Wrap_Struct(klass, 0, dealloc, schema);
  rb_iv_set(rb_schema, "@errors", errors);
  rb_iv_set(rb_schema, "@parse_options", parse_options);

  return rb_schema;
}