Request Header Parser - better way needed to parse 'user-agent'

olddognewtrix123 · January 6, 2017, 9:42pm

Can anyone just point me in the right direction for coming up with a better solution for parsing the ‘user=agent’?
I was able to parse the address and the language in three lines each using libraries but could not find a similar solution for ‘user-agent’ so I had to hack something together. It works for now but doesn’t look like a good solution:

var source = req.headers['user-agent'];
var strungSource = JSON.stringify(source)
var strungSourceArr = strungSource.split(" ");
var newString = strungSourceArr[1]+" "+strungSourceArr[2]+" "+strungSourceArr[3]+" "+strungSourceArr[4];
var updatedString = newString.substring(1, newString.length-1);
console.log(updatedString)

Josh5231 · January 6, 2017, 11:17pm

You can take a look at how I did it.

github.com

Josh5231/header-parser/blob/master/server.js

var express = require("express");
var app = express();
var port = process.env.PORT || 8080;
var bodyParser = require('body-parser');

app.get('/',(req,res)=>{
    var lang = req.headers["accept-language"].split(",")[0];
    var software = req.headers["user-agent"].match(/\((.+?)\)/)[1];
    var out = {"ipaddress":req.ip,"language":lang,"software":software};
   res.send(out); 
});

app.get("/",(req,res)=>{
   res.send(req.body); 
});

app.listen(port, function () {
  console.log('App running on port '+port+"!");
});

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Request Header Parser - better way needed to parse 'user-agent'

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