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use serde_derive::{Deserialize, Serialize};
use std::collections::HashMap;
use warp::{
http::{Response, StatusCode},
Filter,
};
#[derive(Deserialize, Serialize)]
struct MyObject {
key1: String,
key2: u32,
}
#[tokio::main]
async fn main() {
pretty_env_logger::init();
// get /example1?key=value
// demonstrates an optional parameter.
let example1 = warp::get()
.and(warp::path("example1"))
.and(warp::query::<HashMap<String, String>>())
.map(|p: HashMap<String, String>| match p.get("key") {
Some(key) => Response::builder().body(format!("key = {}", key)),
None => Response::builder().body(String::from("No \"key\" param in query.")),
});
// get /example2?key1=value&key2=42
// uses the query string to populate a custom object
let example2 = warp::get()
.and(warp::path("example2"))
.and(warp::query::<MyObject>())
.map(|p: MyObject| {
Response::builder().body(format!("key1 = {}, key2 = {}", p.key1, p.key2))
});
let opt_query = warp::query::<MyObject>()
.map(Some)
.or_else(|_| async { Ok::<(Option<MyObject>,), std::convert::Infallible>((None,)) });
// get /example3?key1=value&key2=42
// builds on example2 but adds custom error handling
let example3 =
warp::get()
.and(warp::path("example3"))
.and(opt_query)
.map(|p: Option<MyObject>| match p {
Some(obj) => {
Response::builder().body(format!("key1 = {}, key2 = {}", obj.key1, obj.key2))
}
None => Response::builder()
.status(StatusCode::BAD_REQUEST)
.body(String::from("Failed to decode query param.")),
});
warp::serve(example1.or(example2).or(example3))
.run(([127, 0, 0, 1], 3030))
.await
}
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