Function send 

pub fn send(
    ctx: &Ctx,
    subscription: &Subscription,
    message: &Value,
    ttl: u32,
) -> impl Future<Output = Result<Sent>> + Send + use<>

Encrypts message (JSON, e.g. message) for subscription and posts it to its push service, signed with the app’s VAPID keys. The push service keeps it up to ttl seconds while the browser is offline. One subrequest.

Errors

• Error::BadRequest when the subscription’s keys are invalid or the message is over MAX_PAYLOAD bytes.
• Error::Internal when a VAPID_* setting is missing or invalid, or the push service refuses the message (other than 404/410), with its status and answer.

Examples

use ocre::push::{self, Sent, Subscription};
use ocre::{Ctx, Result};

async fn notify(ctx: &Ctx, subscription: &Subscription) -> Result<()> {
    let message = push::message("Your video is ready", "Download it now.", "/videos/42");
    if push::send(ctx, subscription, &message, 24 * 3600).await? == Sent::Gone {
        // delete the subscription
    }
    Ok(())
}