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(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); 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)
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Create a new RelaxNG from the contents of
string
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; }
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; }