class Nokogiri::XML::SAX::Parser - nokogiri-1.10.3 Documentation

# class Nokogiri::XML::SAX::Parser

This parser is a SAX style parser that reads it's input as it deems necessary. The parser takes a Nokogiri::XML::SAX::Document, an optional encoding, then given an XML input, sends messages to the Nokogiri::XML::SAX::Document.

Here is an example of using this parser:

    # Create a subclass of Nokogiri::XML::SAX::Document and implement
    # the events we care about:
    class MyDoc < Nokogiri::XML::SAX::Document
      def start_element name, attrs = []
        puts "starting: #{name}"
      end

      def end_element name
        puts "ending: #{name}"
      end
    end

    # Create our parser
    parser = Nokogiri::XML::SAX::Parser.new(MyDoc.new)

    # Send some XML to the parser
    parser.parse(File.open(ARGV[0]))

For more information about SAX parsers, see Nokogiri::XML::SAX. Also see Nokogiri::XML::SAX::Document for the available events.

### Constants

ENCODINGS

  Encodinds this parser supports

### Attributes

document[RW]

The Nokogiri::XML::SAX::Document where events will be sent.

encoding[RW]

The encoding beings used for this document.

### Public Class Methods

new(doc = Nokogiri::XML::SAX::Document.new, encoding = 'UTF-8') click to toggle source

Create a new Parser with `doc` and `encoding`

    # File lib/nokogiri/xml/sax/parser.rb, line 70
    def initialize doc = Nokogiri::XML::SAX::Document.new, encoding = 'UTF-8'
      @encoding = check_encoding(encoding)
      @document = doc
      @warned   = false
    end

### Public Instance Methods

parse(thing, &block) click to toggle source

Parse given `thing` which may be a string containing xml, or an IO object.

    # File lib/nokogiri/xml/sax/parser.rb, line 79
    def parse thing, &block
      if thing.respond_to?(:read) && thing.respond_to?(:close)
        parse_io(thing, &block)
      else
        parse_memory(thing, &block)
      end
    end

parse_file(filename) { |ctx| ... } click to toggle source

Parse a file with `filename`

    # File lib/nokogiri/xml/sax/parser.rb, line 98
    def parse_file filename
      raise ArgumentError unless filename
      raise Errno::ENOENT unless File.exist?(filename)
      raise Errno::EISDIR if File.directory?(filename)
      ctx = ParserContext.file filename
      yield ctx if block_given?
      ctx.parse_with self
    end

parse_io(io, encoding = 'ASCII') { |ctx| ... } click to toggle source

Parse given `io`

    # File lib/nokogiri/xml/sax/parser.rb, line 89
    def parse_io io, encoding = 'ASCII'
      @encoding = check_encoding(encoding)
      ctx = ParserContext.io(io, ENCODINGS[@encoding])
      yield ctx if block_given?
      ctx.parse_with self
    end

parse_memory(data) { |ctx| ... } click to toggle source

    # File lib/nokogiri/xml/sax/parser.rb, line 107
    def parse_memory data
      ctx = ParserContext.memory data
      yield ctx if block_given?
      ctx.parse_with self
    end

### Private Instance Methods

check_encoding(encoding) click to toggle source

    # File lib/nokogiri/xml/sax/parser.rb, line 114
    def check_encoding(encoding)
      encoding.upcase.tap do |enc|
        raise ArgumentError.new("'#{enc}' is not a valid encoding") unless ENCODINGS[enc]
      end
    end