openweather-async
This rust library is used to access the Current Weather portion of the OpenWeather API. It is not an official library, and was created with reference to a synchronous version found here.
setup
To use this library you will need to first sign up at OpenWeather API Sign up and get an API key. If interested, the API documentation is here with examples of the json-formatted response.
To follow the example below, you should store the API key in the .env file as OPENWEATHER_API_KEY=YOUR_API_KEY. The .env file should be place in the root folder of your project.
├── Cargo.toml
├── .env
├── src
│ ├── main.rs
Next, you'll need to add the following dependencies to your Cargo.toml.
openweather-async = "0.0.1"
tokio = { version="0.2.22", features = ["macros", "tcp", "dns", "io-util"]}
dotenv = "0.15.0"
example program
The program below will retrieve the full weather report represented as the OpenWeather type. This type, and the other types that make it up, can be seen found in the models.rs file. If you're looking for a particular field it will help to look there or in the documentation.
While you can directly pass the API key into new, it's recommended that you follow the example below and use the dotenv crate as shown in the example and mentioned above.
use tokio;
use std::env;
use dotenv::dotenv;
use openweather_async::{ OpenWeather, Units};
#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
dotenv().expect("No env file found");
let token = env::var("OPENWEATHER_API_KEY").unwrap();
let weather: OpenWeather = OpenWeather::new(&token, Units::Metric).await?;
let report = weather.get_by_city("Tokyo").await?;
println!("{:?}", report);
println!("{:?}", report.main);
println!("{:?}", report.wind.speed);
Ok(())
}
There are six different ways you can access the API, with the last two can also access other functions as shown below. Keep in mind that each of these calls will be a new request to the API. If you get by the city name you can find the country code within the returned OpenWeather struct.
weather.get_by_city_and_country("Tokyo", "Japan").await?;
weather.get_by_coordinates(56.0, 12.0).await?;
weather.get_by_zipcode(80918, "US").await?;
weather.get_by_cities_in_zone(12.0, 32.0, 15.0, 37.0, 10).await?;
weather.get_by_cities_in_cycle(12.0, 32.0, 3).await?;