SAX Parser
sax-parser is an xml parser written in javascript.
Install
npm install sax-parserAPI
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
- 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