I have a constant link looking like this:
http://link.com/?val1=val1&val2=val2
And this link redirects me to a new link with a random value of a constant param such like;
http://link2.com/?constant=randomvalue/
Each time I use the first link, I get a random value from the following link.
By using Node.js, how can I catch the 'randomvalue' of 'constant' in the second link?
I have to use the first link to reach the second one.
Try reading the second link as a URL
let secondURL = new URL("http://link2.com/?constant=randomvalue/");
Then extract the value of the constant searchparam like so
let constantValue = secondURL.searchParams.get("constant"); //"randomvalue/"
@Misantorp's answer is probably best, but there is another way to do it. Check out the querystring module built into Node, it has a convenient parse method just for things like this: https://nodejs.org/api/querystring.html
This should work:
const querystring = require('querystring');
querystring.parse("http://link2.com/?constant=randomvalue/"); // { 'http://link2.com/?constant': 'randomvalue/' }
You may want to substring from the ? onwards to make it more clear:
const str = "http://link2.com/?constant=randomvalue/";
const paramIndex = str.indexOf("?");
if (paramIndex >= 0) {
const queryParamStr = str.substr(str.indexOf("?"));
const queryParams = querystring.parse(queryParamStr);
console.log(queryParams["constant"]);
}
