Need help extracting string from a text file via regex [closed]

Question

Closed. This question is seeking recommendations for software libraries, tutorials, tools, books, or other off-site resources. It does not meet Stack Overflow guidelines. It is not currently accepting answers.

We don’t allow questions seeking recommendations for software libraries, tutorials, tools, books, or other off-site resources. You can edit the question so it can be answered with facts and citations.

Closed 8 years ago.

Improve this question

I'm trying to extract a certain js object from a text/js file via regex. The whole file contains a lot of code, but I'm only interested in getting a variable called cfg.

The file could look like this:

function A(){

}

var cfg = {
   setting:1,
   setting2: 5,
   setting3:[],
   setting4:{ 
      setting5:"test"
   }
};

function B(){

}

Could anyone help me to figure out the regex for this ? I'm terrible at regex and I've tried plenty of available solutions but some of them don't seem to be valid in C#. Right now my solution is using:

string[] split = input.Split(new string[] { "var cfg = " }, StringSplitOptions.None);
if(split.Length > 2)
{
   string[] split2 = split[1].Split(new string[] { ";" }, StringSplitOptions.None);
   return JObject.Parse(split2[0]);
}

Which obviously doesn't cover different writings of the cfg object. Like var cfg={};

Thanks in advance!

Don't use regex for this but a real parser instead, as discussed here for example: stackoverflow.com/questions/14355910/… — Flat Eric
– Flat Eric, Commented Nov 24, 2017 at 16:14

Titian Cernicova-Dragomir · Accepted Answer · 2017-11-24 16:16:55Z

0

I would recoment you use a JS parser such as Jint if your code is more complex or will change. But for your example this should work:

var r = new Regex(@"var cfg = (?<Content>\{[^;]*});");
var content = r.Match(text).Groups["Content"];

Note: If the cfg literal contains ; the regex will not work as expected.

answered Nov 24, 2017 at 16:16

Titian Cernicova-Dragomir

253k37 gold badges465 silver badges395 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Need help extracting string from a text file via regex [closed]

1 Answer 1

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Linked

Related