class Nokogiri::XML::SAX::PushParser
PushParser can parse a document that is fed to it manually. It must be given a SAX::Document object which will be called with SAX events as the document is being parsed.
Calling #<< writes XML to the parser, calling any SAX callbacks it can.
#finish tells the parser that the document is finished and calls the end_document SAX method.
Example:
parser = PushParser.new(Class.new(XML::SAX::Document) { def start_document puts "start document called" end }.new) parser << "<div>hello<" parser << "/div>" parser.finish
Attributes
The Nokogiri::XML::SAX::Document on which the PushParser will be operating
Public Class Methods
Create a new PushParser with doc
as the SAX Document,
providing an optional file_name and encoding
# File lib/nokogiri/xml/sax/push_parser.rb, line 34 def initialize(doc = XML::SAX::Document.new, file_name = nil, encoding = 'UTF-8') @document = doc @encoding = encoding @sax_parser = XML::SAX::Parser.new(doc) ## Create our push parser context initialize_native(@sax_parser, file_name) end
Public Instance Methods
Finish the parsing. This method is only necessary for Nokogiri::XML::SAX::Document#end_document to be called.
# File lib/nokogiri/xml/sax/push_parser.rb, line 54 def finish write '', true end
static VALUE get_options(VALUE self)
{
xmlParserCtxtPtr ctx;
Data_Get_Struct(self, xmlParserCtxt, ctx);
return INT2NUM(ctx->options);
}
static VALUE set_options(VALUE self, VALUE options)
{
xmlParserCtxtPtr ctx;
Data_Get_Struct(self, xmlParserCtxt, ctx);
if (xmlCtxtUseOptions(ctx, (int)NUM2INT(options)) != 0)
rb_raise(rb_eRuntimeError, "Cannot set XML parser context options");
return Qnil;
}
Write a chunk of XML to the PushParser. Any callback methods that can be
called will be called immediately.
# File lib/nokogiri/xml/sax/push_parser.rb, line 46 def write chunk, last_chunk = false native_write(chunk, last_chunk) end
Private Instance Methods
Initialize the push parser with xml_sax using
filename
static VALUE initialize_native(VALUE self, VALUE _xml_sax, VALUE _filename)
{
xmlSAXHandlerPtr sax;
const char * filename = NULL;
xmlParserCtxtPtr ctx;
Data_Get_Struct(_xml_sax, xmlSAXHandler, sax);
if(_filename != Qnil) filename = StringValueCStr(_filename);
ctx = xmlCreatePushParserCtxt(
sax,
NULL,
NULL,
0,
filename
);
if(ctx == NULL)
rb_raise(rb_eRuntimeError, "Could not create a parser context");
ctx->userData = NOKOGIRI_SAX_TUPLE_NEW(ctx, self);
ctx->sax2 = 1;
DATA_PTR(self) = ctx;
return self;
}
Write chunk to PushParser.
last_chunk triggers the end_document handle
static VALUE native_write(VALUE self, VALUE _chunk, VALUE _last_chunk)
{
xmlParserCtxtPtr ctx;
const char * chunk = NULL;
int size = 0;
Data_Get_Struct(self, xmlParserCtxt, ctx);
if(Qnil != _chunk) {
chunk = StringValuePtr(_chunk);
size = (int)RSTRING_LEN(_chunk);
}
if(xmlParseChunk(ctx, chunk, size, Qtrue == _last_chunk ? 1 : 0)) {
if (!(ctx->options & XML_PARSE_RECOVER)) {
xmlErrorPtr e = xmlCtxtGetLastError(ctx);
Nokogiri_error_raise(NULL, e);
}
}
return self;
}