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use std::env;
use axum::{
extract::{Json},
};
use web_push::{
SubscriptionInfo,
VapidSignatureBuilder,
WebPushMessageBuilder,
ContentEncoding,
WebPushClient,
IsahcWebPushClient,
};
pub async fn vapid() -> String {
let vapid_public_key = env::var("VAPID_PUBLIC_KEY").unwrap_or_default();
String::from(vapid_public_key)
}
pub async fn register() -> String {
String::from("OK")
}
pub async fn unregister() -> String {
String::from("OK")
}
#[axum::debug_handler]
pub async fn echo(
Json(echo): Json<Echo>,
) -> Result<(), crate::error::Internal> {
// Look this up from a subscription record? Or get it from the client and trust?
let endpoint = echo.endpoint;
// Get these from client:
let p256dh = echo.keys.p256dh;
let auth = echo.keys.auth;
println!("endpoint: {:?}", endpoint);
println!("p256dh: {:?}", p256dh);
println!("auth: {:?}", auth);
// You would likely get this by deserializing a browser `pushSubscription` object.
let subscription_info = SubscriptionInfo::new(endpoint, p256dh, auth);
// This will need to come from the DB eventually.
let private_key = String::from(env::var("VAPID_PRIVATE_KEY").unwrap_or_default());
let sig_builder = VapidSignatureBuilder::from_base64(&private_key, &subscription_info)?.build()?;
// Now add payload and encrypt.
let mut builder = WebPushMessageBuilder::new(&subscription_info);
// Eventually, this message will be something other than an echo:
let content = echo.msg.as_bytes();
builder.set_payload(ContentEncoding::Aes128Gcm, content);
builder.set_vapid_signature(sig_builder);
let client = IsahcWebPushClient::new()?;
// Finally, send the notification!
client.send(builder.build()?).await?;
// Fix up return type?
Ok(())
}
#[derive(serde::Deserialize)]
pub struct Keys {
pub p256dh: String,
pub auth: String,
}
#[derive(serde::Deserialize)]
pub struct Echo {
pub msg: String,
pub endpoint: String,
pub expirationTime: Option<String>,
pub keys: Keys,
}
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