Redirection Based on Query String

Question

Not wanting to bloat up an .htaccess with 300 entries, what would be the javascript I could use to redirect to URLs based on a query string in the request to this single file. For example,

https://www.mywebsite.com/redirect.jhtml?Type=Cool&LinkID=57

The only part I care about is the 57 and then redirect it to wherever: https://www.anothercoolwebsite/secretworld/

In the following case, take the 34 and redirect:

https://www.mywebsite.com/redirect.jhtml?Type=Cool&LinkID=34 https://www.anoldwebsite.com/cool/file.html

Thank you!

start by looking at window.location. You could use a regex pattern match on this to get the param you want, like this maybe location.match(/LinkID=([0-9]+)/). — David784
– David784, Commented Mar 10, 2018 at 1:20
Yes, I referenced this in my tag. window.location was the first thing which came to mind. I am not sure how to incorporate the query string into a defined value for a redirect though. — David Turner
– David Turner, Commented Mar 10, 2018 at 1:23

Ben · Accepted Answer · 2018-03-10 01:37:08Z

2

This should do you fine. Keep in mind a server-side solution like a PHP script will work for more clients. Since you mentioned .htaccess, I think I should let you know about the fallback resource command

Anyways, here is the JS only solution

function parseString(){//Parse query string
    var queryString=location.search.substring(1);//Remove ? mark

    var pair = queryString.split('&'); //Key value pairs

    var returnVal={};
    pair.forEach(function(item,i){
        var currPair = item.split('=');//Give name and value

        returnVal[currPair[0]]=currPair[1];
    });

    return returnVal;
}

var links=["index", "about"];//Sample array of links, make sure this matches up with your LinkID
location.href=links[parseString().LinkID]+".html"; //Redirect based on LinkID

edited Mar 10, 2018 at 1:37

answered Mar 10, 2018 at 1:27

Ben

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2 Comments

David Turner Over a year ago

Thank you, Ben! I am confused on how to associate several LinkIDs with their related URLs though. How would I send 57 to anothercoolwebsite/secretworld and 34 to anoldwebsite.com/cool/file.html for example?

Ben Over a year ago

@DavidTurner In the second last line, I show an array, arrays start counting at zero, so "index" would be LinkID=0, "about" would be 1, etc etc

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