class Nokogiri::XML::RelaxNG
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.
Public Class Methods
from_document(doc)
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Create a new RelaxNG schema from the Nokogiri::XML::Document doc
static VALUE from_document(VALUE klass, VALUE document)
{
xmlDocPtr doc;
xmlRelaxNGParserCtxtPtr ctx;
xmlRelaxNGPtr schema;
VALUE errors;
VALUE rb_schema;
Data_Get_Struct(document, xmlDoc, doc);
/* In case someone passes us a node. ugh. */
doc = doc->doc;
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);
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);
return rb_schema;
}
read_memory(string)
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Create a new RelaxNG from the contents of
string
static VALUE read_memory(VALUE klass, VALUE content)
{
xmlRelaxNGParserCtxtPtr ctx = xmlRelaxNGNewMemParserCtxt(
(const char *)StringValuePtr(content),
(int)RSTRING_LEN(content)
);
xmlRelaxNGPtr schema;
VALUE errors = rb_ary_new();
VALUE rb_schema;
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);
return rb_schema;
}
Private Instance Methods
validate_document(document)
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Validate a Nokogiri::XML::Document against this RelaxNG schema.
static VALUE validate_document(VALUE self, VALUE document)
{
xmlDocPtr doc;
xmlRelaxNGPtr schema;
VALUE errors;
xmlRelaxNGValidCtxtPtr valid_ctxt;
Data_Get_Struct(self, xmlRelaxNG, schema);
Data_Get_Struct(document, xmlDoc, doc);
errors = rb_ary_new();
valid_ctxt = xmlRelaxNGNewValidCtxt(schema);
if(NULL == valid_ctxt) {
/* we have a problem */
rb_raise(rb_eRuntimeError, "Could not create a validation context");
}
#ifdef HAVE_XMLRELAXNGSETVALIDSTRUCTUREDERRORS
xmlRelaxNGSetValidStructuredErrors(
valid_ctxt,
Nokogiri_error_array_pusher,
(void *)errors
);
#endif
xmlRelaxNGValidateDoc(valid_ctxt, doc);
xmlRelaxNGFreeValidCtxt(valid_ctxt);
return errors;
}