Get rid of the html-parsing-with-regexes

[whichxjy]

Now we use regexes to parse the metadata in the input file. Maybe there's a better way to do that without parsing HTML with regexes.

[helper-uttam]

For parsing metadata in the input file you can use body-parser in the JavaScript file. It's very much effective and convenient .
Else there is also one way using JavaScript DOM model or jQuery.

Please let me know if you need help on these topics!