Basic auth example

[MikhailMS]

Hello there,

It would be interesting to see how I can pass authenticaiton credentials when using this library. Since there is no example anywhere and docs aren't clear on that matter, I'd like to ask this in the issue, which is not the best way (I think), but see no another option.

I've tried a couple of options with headers

1. setting it directly to SyncClientBuilder
2. setting it to reqwest ClientBuilder and then passing reqwest client to SyncClientBuilder but neither was successful

Solution to the issue then may ideally lead to an example file in the repo :)

[dcarosone]

FWIW, here's an example, not necessarily the best example

let client = SyncClientBuilder::new()
    .static_node("https://es.example.com:9200")
    .params_fluent(|p| {
        p.header(
            AUTHORIZATION,
            HeaderValue::from_str(&format!(
                "Basic {}",
                encode(r#"username:password"#)
            ))
           .unwrap(),
        )
    })
    .build()
    .unwrap();

[KodrAus]

Thanks for the example @dcarosone! We could definitely wrap that up more nicely in the client so you don't have to fiddle with http headers yourself.

[mwilliammyers]

Closing in favor of #400 which has more info.

[mwilliammyers]

As of: #401 (6ed243570bb64fdf398cafe0518c5d9a02321c76) you can now do:

use elastic::client::SyncClientBuilder;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let http_client = reqwest::Client::builder()
        .danger_accept_invalid_certs(true)
        .build()?;

    let client = SyncClientBuilder::new()
        .static_node("https://localhost:9201")
        .http_client(http_client)
        .params_fluent(|p| p.basic_auth("admin", Some("admin")).unwrap())
        .build()?;

    println!("{:#?}", client.ping().send()?);

    Ok(())
}