extracting access token out of string in javascript

Question

I have a string which and I need to get the access token out of this string .However we also need to confirm if access token is there or not .

The string is as followed .

      ?utm_source=xyz&utm_medium=xyza&utm_campaign=xyzb&access_token=abybsjw16373vdgw

I need to get the access token out of this using javascript. I would like to understand as how people approach such problems .

Possible duplicate of [How can I get query string values in JavaScript?](https://stackoverflow.com/questions/901115/how-can-i-get-query-string-values-in-javascript) — imjared, Apr 07 '19 at 10:08

akshay bagade · Answer 1 · 2019-04-07T11:10:52.230

4

we can also do this like

let str="?utm_source=xyz&utm_medium=xyza&utm_campaign=xyzb&access_token=abybsjw16373vdgw"

       let tokenIsPresent=str.search("access_token")
       if(tokenIsPresent !=-1){
       let token= str.slice(tokenIsPresent+13)
        console.log(token)}
        else{console.log("token is not present")}

we can find access_token by string.search which will return starting position of our search string ie "50" here and then we have to add the length of our search ie "access_token=" which is 13 then we have to slice it by 50+13

edited Apr 07 '19 at 11:10

answered Apr 07 '19 at 10:54

akshay bagade

1,169
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11
24

1

What if the `access_token` length will change? this is generated on backend side so we cannot guarantee that the length will be the same e.g. you can take a look on https://stackoverflow.com/questions/4408945/what-is-the-length-of-the-access-token-in-facebook-oauth2 You can e.g. slice to the end of the string, but we are still not sure if the parameters orders will be the same. We can get index of `access_token`, check if we can find any `&` characters and slice till the `&` and if not found, slice til the end – bsekula Apr 09 '19 at 19:55
whatever the length and parameter order, if we got "access_token" at last it will work regardless of tokens length – akshay bagade Apr 11 '19 at 06:39
If the access token length will change, to e.g. 14, and you will slice 13 characters you will miss one char at the end – bsekula Apr 11 '19 at 06:45
did you asking about "access_token" as a key or its value eg "abybsjw16373vdgw", here access_token=abybsjw16373vdgw, its value should change every time ie "abybsjw16373vdgw" and key ie "access_token" it will remain as it is – akshay bagade Apr 11 '19 at 07:59
Yes `access_token` will be the same :) I think the question is how to get value of the access_token – bsekula Apr 11 '19 at 08:21
and we are getting it :) – akshay bagade Apr 11 '19 at 10:01

score 1 · Answer 2 · answered Apr 07 '19 at 10:18

1

You can try:

const str = "?utm_source=xyz&utm_medium=xyza&utm_campaign=xyzb&access_token=abybsjw16373vdgw "
const accessParts = str.match('access_token=.*$')[0].split("=")

console.log(accessParts) // ["access_token", "abybsjw16373vdgw "]

answered Apr 07 '19 at 10:18

bsekula

914
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score 0 · Answer 3 · answered Apr 07 '19 at 10:17

0

let token='';
if(window.location.href.split('access_token').length>0){
    token=window.location.href.split('access_token')[1].split('&').join(''); 
}
if(!token){
    console.log('token is missing');
}

answered Apr 07 '19 at 10:17

Ashikur Rahman

84
1
7

extracting access token out of string in javascript

3 Answers3