html-parser
Advanced tools
Now with less explosions!
The purpose of this library is not to be the best XML parsing library ever conceived. Because it's not. It's meant to be an HTML/XML parser that doesn't require valid HTML/XML. It's also meant to act as a sanitizer, which is the main reason for it's existence.
For example, you can just shove a blob of text into it, and it will happily parse as if it were valid XML.
npm install html-parser
var htmlParser = require('html-parser');
var html = '<!doctype html><html><body onload="alert(\'hello\');">Yo<br />dawg</body></html>';
htmlParser.parse(html, {
openElement: function(name) { console.log('open: %s', name); },
closeOpenedElement: function(name, token) { console.log('close token: %s', token); },
closeElement: function(name) { console.log('close: %s', name); },
comment: function(value) { console.log('comment: %s', value); },
cdata: function(value) { console.log('cdata: %s', value); },
attribute: function(name, value) { console.log('attribute: %s=%s', name, value); },
docType: function(value) { console.log('doctype: %s', value); }
});
/*
doctype: html
open: html
close token: >
open: body
attribute: onload=alert('hello');
close token: >
open: br
close token: />
close: body
close: html
*/
var htmlParser = require('html-parser');
var html = '<script>alert(\'danger!\')</script><p onclick="alert(\'danger!\')">blah blah<!-- useless comment --></p>';
var sanitized = htmlParser.sanitize(html, {
elements: [ 'script' ],
attributes: [ 'onclick' ],
comments: true
});
console.log(sanitized);
//<p>blah blah</p>
var htmlParser = require('html-parser');
var html = '<script>alert(\'danger!\')</script><p onclick="alert(\'danger!\')">blah blah<!-- useless comment --></p>';
var sanitized = htmlParser.sanitize(html, {
elements: function(name) {
return name === 'script';
},
attributes: function(name, value) {
return /^on/i.test(name) || /^javascript:/i.test(value);
}
comments: true
});
console.log(sanitized);
//<p>blah blah</p>
/**
* Parses the given string o' HTML, executing each callback when it
* encounters a token.
*
* @param {String} htmlString A string o' HTML
* @param {Object} [callbacks] Callbacks for each token
* @param {Function} [callbacks.attribute] Takes the name of the attribute and its value
* @param {Function} [callbacks.openElement] Takes the tag name of the element
* @param {Function} [callbacks.closeOpenedElement] Takes the tag name of the element and the token used to
* close it (">", "/>", "?>")
* @param {Function} [callbacks.closeElement] Takes the name of the element
* @param {Function} [callbacks.comment] Takes the content of the comment
* @param {Function} [callbacks.docType] Takes the content of the document type declaration
* @param {Function} [callbacks.cdata] Takes the content of the CDATA
* @param {Function} [callbacks.xmlProlog] Takes no arguments
* @param {Function} [callbacks.text] Takes the value of the text node
*/
parse(htmlString, callbacks)
/**
* Parses the HTML contained in the given file asynchronously.
*
* Note that this is merely a convenience function, it will still read the entire
* contents of the file into memory.
*
* @param {String} fileName Name of the file to parse
* @param {String} [encoding] Optional encoding to read the file in, defaults to utf8
* @param {Object} [callbacks] Callbacks to pass to parse()
* @param {Function} [callback]
*/
parseFile(fileName, encoding, callbacks, callback)
/**
* Sanitizes an HTML string.
*
* If removalCallbacks is not given, it will simply reformat the HTML
* (i.e. converting all tags to lowercase, etc.). Note that this function
* assumes that the HTML is decently formatted and kind of valid. It
* may exhibit undefined or unexpected behavior if your HTML is trash.
*
* @param {String} htmlString A string o' HTML
* @param {Object} [removalCallbacks] Callbacks for each token type
* @param {Function|Array} [removalCallbacks.attributes] Callback or array of specific attributes to strip
* @param {Function|Array} [removalCallbacks.elements] Callback or array of specific elements to strip
* @param {Function|Boolean} [removalCallbacks.comments] Callback or boolean indicating to strip comments
* @param {Function|Boolean} [removalCallbacks.docTypes] Callback or boolean indicating to strip doc type declarations
* @return {String} The sanitized HTML
*/
sanitize(htmlString, removalCallbacks)
git clone https://github.com/tmont/html-parser.git
cd html-parser
npm link
npm test
FAQs
HTML/XML parser with less explosions
The npm package html-parser receives a total of 1,047 weekly downloads. As such, html-parser popularity was classified as popular.
We found that html-parser demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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