How to dynamically insert closing tags in xml file if not present using nodejs?
Question
For example
<note>
<to>Tove</to>
<from>Jani</from>
<heading>Reminder</heading>
<body>Don't forget me this weekend!</body>
In the above xml </note> is missed, how to find and add the missed close tag dynamically in xml using nodejs.
2 answers
solution1
1 2016-12-02 12:50:36
In order to parse and validate XML, a schema definition (XSD) is required.
With this, the parser is able to validate the elements and tell you if any are invalid - missing, spelled incorrectly etc.
Take your example - without an XSD, you won't know if note can contain any additional child elements such as date for example.
<note>
<to>Tove</to>
<from>Jani</from>
<heading>Reminder</heading>
<body>Don't forget me this weekend!</body>
<date>2016-01-01</date>
Whereas with as XSD, the parser will know that a note element will contain to , from , heading and body elements, after which it will expect a closing note tag.
Once you know where your validation issues are - for example a missing closing tag - you can perform your cleanup.
There are many XML parser options for NodeJS such as...
https://www.npmjs.com/package/libxml-xsd https://www.npmjs.com/package/jgexml
solution2
0 2016-12-02 12:19:45
You need to have some parser which will parse the input dirty HTML and sanitize it. You can feed DOMPurify with string full of dirty HTML and it will return a string with clean HTML. Check this out https://github.com/cure53/DOMPurify
var clean = DOMPurify.sanitize(dirtyHTML);
The demo site https://cure53.de/purify
You can also explore JSDOM and other similar DOM parser libraries.
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