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sax-parser

2.0.1 • Public • Published

SAX Parser

npm version License

sax-parser is an xml parser written in javascript.

Install

npm install sax-parser

API

SAX Parser provides a SAX2 parser interface that can take a string, file. The parser can take characters from the document in chunks. To send chunks of the document to the parser use 'parseString(xml)'

SAX Parser

new xml.SaxParser()

  • Instantiate a new SaxParser
  • returns: a SaxParser object

new xml.SaxParser(callback)

  • Instantiate a new SaxParser
  • returns: a SaxParser object
  • Arguments
    • callback - a function that accepts the new sax parser as an argument

Parse

parser.parseString(string)

  • Parse an in memory string
  • return: boolean. true if no errors, false otherwise
  • Arguments
    • string - a string representing the document to parse

parser.pause()

pauses parsing of the document

parser.resume()

resumes parsing of the document

Callbacks

parser.onStartDocument(function() {})

Called at the start of a document

parse.onEndDocument(function() {})

Called at the end of the document parse

parser.onStartElementNS(function(elem, attrs, prefix, uri, namespaces) {})

Called on an open element tag

  • Arguments
    • elem - a string representing the element name
    • attrs - an array of arrays: [[key, value], [key, value]]
    • prefix - a string representing the namespace prefix of the element
    • uri - the namespace URI of the element
    • namespaces - an array of arrays: [[prefix, uri], [prefix, uri]]

parser.onEndElementNS(function(elem, prefix, uri) {})

Called at the close of an element

  • Arguments
    • elem - a string representing the element name
    • prefix - a string representing the namespace prefix of the element
    • uri - the namespace URI of the element

parser.onCharacters(function(chars) {})

Called when a set of content characters is encountered

  • Arguments
    • chars - a string of characters

parser.onCdata(function(cdata) {})

Called when a CDATA is encountered

  • Arguments
    • cdata - a string representing the CDATA

parser.onComment(function(msg) {})

Called when a comment is encountered

  • Arguments
    • msg - a string representing the comment

parser.onWarning(function(msg) {})

Called when a warning is encountered

  • Arguments
    • msg - a string representing the warning message

parser.onError(function(msg) {})

Called when an error is encountered

  • Arguments
    • msg - a string representing the error message

EXAMPLE USAGE

var xml = require("./lib/sax-parser");
 
var parser = new xml.SaxParser(function(cb) {
  cb.onStartDocument(function() {});
  cb.onEndDocument(function() {});
  cb.onStartElementNS(function(elem, attrs, prefix, uri, namespaces) {
    console.log(
      "=> Started: " +
        elem +
        " uri=" +
        uri +
        " (Attributes: " +
        JSON.stringify(attrs) +
        " )"
    );
  });
  cb.onEndElementNS(function(elem, prefix, uri) {
    console.log("<= End: " + elem + " uri=" + uri + "\n");
    parser.pause(); // pause the parser
    setTimeout(function() {
      parser.resume();
    }, 100); //resume the parser
  });
  cb.onCharacters(function(chars) {
    console.log("<CHARS>" + chars + "</CHARS>");
  });
  cb.onCdata(function(cdata) {
    console.log("<CDATA>" + cdata + "</CDATA>");
  });
  cb.onComment(function(msg) {
    console.log("<COMMENT>" + msg + "</COMMENT>");
  });
  cb.onWarning(function(msg) {
    console.log("<WARNING>" + msg + "</WARNING>");
  });
  cb.onError(function(msg) {
    console.log("<ERROR>" + JSON.stringify(msg) + "</ERROR>");
  });
});
 
//example read from chunks
parser.parseString("<html><body>");
parser.parseString("<!-- This is the start");
parser.parseString(" and the end of a comment -->");
parser.parseString("and lots");
parser.parseString("and lots of text&am");
parser.parseString("p;some more.");
parser.parseString("<![CD");
parser.parseString("ATA[ this is");
parser.parseString(" cdata ]]>");
parser.parseString("</body");
parser.parseString("></html>");

Author

  • Copyright 2009 - 2010 © Rob Righter (@robrighter)
  • Contributions from David Joham

License

This project is licensed under the MIT License - see the LICENSE file for details

Keywords

install

npm i sax-parser

Downloadsweekly downloads

5

version

2.0.1

license

MIT

homepage

github.com

repository

Gitgithub

last publish

collaborators

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