Rust

You need to install reqwest crate and enable its blocking feature.

Run in terminal:

cargo add reqwest

Then open Cargo.toml and modify this line in [dependencies] section:

reqwest = { version = "<Already installed version>", features = ["blocking", "json"] }

Replace <Already installed version> with number you've had after reqwest installation.

Send Message via REST API

use std::collections::HashMap;
use reqwest::blocking::Client;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = Client::new();
    let mut data = HashMap::new();
    data.insert("dock_id", "<Dock ID>");
    data.insert("secret_key", "<Secret Key>");
    data.insert("msg", "Hello from Rust!");

    let res = client.post("https://api.pingdock.io/ping")
        .json(&data)
        .send()?;

    println!("{}\n{}", res.status(), res.text()?);
    Ok(())
}

Send Message via Webhook

For this example you need to add serde_json crate.

Run in terminal:

cargo add serde_json

Now you can run an example:

use reqwest::blocking::Client;
use reqwest::header::CONTENT_TYPE;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = Client::new();
    let payload = serde_json::json!({ "msg": "PingDock webhook from Rust!" });

    let res = client.post("https://api.pingdock.io/webhook")
        .basic_auth("<Dock ID>", Some("<Secret Key>"))
        .header(CONTENT_TYPE, "application/json")
        .json(&payload)
        .send()?;

    println!("{}\n{}", res.status(), res.text()?);
    Ok(())
}