Split value on array rust

Question

I need to split value of array like

let v: Vec<&str> = token.split("Bearer ").collect();

and log the value of the token the value is Bearer eyJGciOiJSU and I need to get only eyJGciOiJSU when I print the v[1] to the log I got error index out of range, any idea?

Please write a minimal reproducible example and check it exhibits your error. The playground is a popular solution for this. — Denys Séguret
– Denys Séguret, Commented Jul 1, 2021 at 14:10
Also, if you just want to strip the prefix, look at strip_prefix. — Denys Séguret
– Denys Séguret, Commented Jul 1, 2021 at 14:12

isaactfa · Accepted Answer · 2021-07-01 14:34:28Z

4

Hard to assess without a minimal example, but this works on the playground:

fn main() {
    let token = "Bearer eyJGciOiJSU";
    let v: Vec<_> = token.split("Bearer ").collect();
    println!("{}", v[1]); // prints "eyJGciOiJSU"
    
    let id = token.strip_prefix("Bearer ").expect(r#"Token ought to start with "Bearer""#);
    println!("{}", id); // prints "eyJGciOiJSU"
}

answered Jul 1, 2021 at 14:34

isaactfa

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3 Comments

Jenny M Over a year ago

Thanks a lot! one question , I need to get the payload eg name from the jwt token any idea how to do it? play.rust-lang.org/…

Jenny M Over a year ago

this is the jwt example jwt.io , I need at the end to get the ` "name": "John Doe"` from the payload, could you please assist? `

isaactfa Over a year ago

@JennyM You might want to have a look at this example from the jasonwebtoken docs. You should just need to replace the Claims struct with a struct that matches your payload type. I.e. something like struct Payload { sub: String, name: String, iat: usize }.

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