CODEWITHSUNDEEP
javascripthtmlnode.jsbashsed
ton
ton

Reputation: 4597

eval javascript text from html body

I have a bash script using curl that download a page, then use grep and sed to extract javascript inside the html block to a file, so after it I use node to evaluate and use javascript downloaded. is something like:

curl 'http://...' ... | grep -E "(varxpto\(|fnxpto)" | sed 's|<[/]\?script[^>]*>||g' > fn.js  
x="$(node -pe "var fs = require('fs'); eval( fs.readFileSync('fn.js')+'' ); 
var val=fnxpto('${PW}'); val;")"

it works like a charm using bash. but I need to expose it as a service, so I trying to do it in nodejs.

My problem is... how to do it? I tried xpath but seems it needs xmldoc as prereq and xmldoc do not parse my html (it think it's exclusive for xml, not html).

Not what I want, but I trying to exec the grep/sed too as workarround for my problem.

NOTE: I have the html text recovered using require('http') I don't need help here. Only on extract javascript from the html and import/evaluate it.

Anyone has any idea of how can I extract javascript text script from a html and evaluate it in node?

Upvotes: 0

Views: 1296

Answers (1)

mscdex
mscdex

Reputation: 106726

You could use something like cheerio to parse the HTML and then query the document for script tags:

// `data` is the entire string response from `http.request()`
var cheerio = require('cheerio'),
    $ = cheerio.load(data);

$('script').each(function(i, elem) {
  console.dir($(this).text());
  // do eval() or whatever else here
});

Upvotes: 2

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