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use anyhow::Result;
use rocket::http::uri::Absolute;
use serde_json::{json, Value};
use std::time::Duration;
use std::{fs::File, io::Read, path::Path};
use serde::Serialize;
use web_push::{
ContentEncoding, SubscriptionInfo, VapidSignatureBuilder, WebPushClient, WebPushMessageBuilder,
};
use crate::db::DbConn;
use crate::types::{Device, DeviceID, DevicePush, UserID};
pub(crate) struct PushClient {
key: Box<[u8]>,
client: WebPushClient,
subject: String,
base_uri: Absolute<'static>,
default_ttl: Duration,
}
impl PushClient {
pub(crate) fn new<P: AsRef<Path>>(
key: P,
subject: &str,
base_uri: Absolute<'static>,
default_ttl: Duration,
) -> Result<Self> {
let mut key_bytes = vec![];
File::open(key).and_then(|mut f| f.read_to_end(&mut key_bytes))?;
Ok(PushClient {
key: key_bytes.into_boxed_slice(),
client: WebPushClient::new()?,
subject: subject.to_string(),
base_uri,
default_ttl,
})
}
async fn push_raw(&self, to: &DevicePush, ttl: Duration, data: Option<&[u8]>) -> Result<()> {
let sub = SubscriptionInfo::new(&to.callback, &to.public_key, &to.auth_key);
let mut sig = VapidSignatureBuilder::from_pem(&*self.key, &sub)?;
// mozilla requires {aud,exp,sub} or message will get a 401 unauthorized.
// {aud,exp} are added automatically
sig.add_claim("sub", self.subject.as_str());
let mut builder = WebPushMessageBuilder::new(&sub)?;
if let Some(data) = data {
builder.set_payload(ContentEncoding::Aes128Gcm, data);
}
builder.set_vapid_signature(sig.build()?);
builder.set_ttl(ttl.as_secs().min(u32::MAX as u64) as u32);
Ok(self.client.send(builder.build()?).await?)
}
async fn push_one(
&self,
context: &str,
db: Option<&DbConn>,
to: &Device,
ttl: Duration,
data: Option<&[u8]>,
) -> Result<()> {
match (to.push_expired, to.push.as_ref()) {
(false, Some(ep)) => match self.push_raw(ep, ttl, data).await {
Ok(()) => Ok(()),
Err(e) => {
warn!("{} push to {} failed: {}", context, &to.device_id, e);
if let Some(db) = db {
if let Err(e) = db.set_push_expired(&to.device_id).await {
warn!("failed to set {} push_endpoint_expired: {}", &to.device_id, e);
}
}
Err(e)
},
},
(_, None) => Err(anyhow!("no push callback")),
(true, _) => Err(anyhow!("push endpoint expired")),
}
}
async fn push_all(
&self,
context: &str,
db: Option<&DbConn>,
to: &[Device],
ttl: Duration,
msg: impl Serialize,
) {
let msg = serde_json::to_vec(&msg).expect("push message serialization failed");
for dev in to {
// ignore errors here, except by logging them. we can't notify the client
// about anything and failing isn't an option either.
let _ = self.push_one(context, db, dev, ttl, Some(&msg)).await;
}
}
pub(crate) async fn command_received(
&self,
db: &DbConn,
to: &Device,
command: &str,
index: i64,
sender: &Option<DeviceID>,
) -> Result<()> {
let url =
format!("{}/auth/v1/account/device/commands?index={}&limit=1", self.base_uri, index);
let msg = json!({
"version": 1,
"command": "fxaccounts:command_received",
"data": {
"command": command,
"index": index,
"sender": sender,
"url": url,
},
});
let msg = serde_json::to_vec(&msg)?;
self.push_one("command_received", Some(db), to, self.default_ttl, Some(&msg)).await
}
pub(crate) async fn device_connected(&self, db: &DbConn, to: &[Device], name: &str) {
let msg = json!({
"version": 1,
"command": "fxaccounts:device_connected",
"data": {
"deviceName": name,
},
});
self.push_all("device_connected", Some(db), to, self.default_ttl, &msg).await;
}
pub(crate) async fn device_disconnected(&self, db: &DbConn, to: &[Device], id: &DeviceID) {
let msg = json!({
"version": 1,
"command": "fxaccounts:device_disconnected",
"data": {
"id": id,
},
});
self.push_all("device_disconnected", Some(db), to, self.default_ttl, &msg).await;
}
pub(crate) async fn profile_updated(&self, db: &DbConn, to: &[Device]) {
let msg = json!({
"version": 1,
"command": "fxaccounts:profile_updated",
});
self.push_all("profile_updated", Some(db), to, self.default_ttl, &msg).await;
}
pub(crate) async fn account_verified(&self, db: &DbConn, to: &[Device]) {
for dev in to {
// ignore errors here, except by logging them. we can't notify the client
// about anything and failing isn't an option either.
let _ = self.push_one("account_verified", Some(db), dev, Duration::ZERO, None).await;
}
}
pub(crate) async fn account_destroyed(&self, to: &[Device], uid: &UserID) {
let msg = json!({
"version": 1,
"command": "fxaccounts:account_destroyed",
"data": {
"uid": uid,
},
});
self.push_all("account_destroyed", None, to, self.default_ttl, &msg).await;
}
pub(crate) async fn password_reset(&self, to: &[Device]) {
let msg = serde_json::to_vec(&json!({
"version": 1u32,
"command": "fxaccounts:password_reset",
}))
.expect("serde failed");
for dev in to {
// ignore errors here, except by logging them. we can't notify the client
// about anything and failing isn't an option either.
let _ = self.push_one("password_reset", None, dev, self.default_ttl, Some(&msg)).await;
// NOTE password_reset alone doesn't seem to do much, se we also disconnect
// each device explicitly.
let msg = serde_json::to_vec(&json!({
"version": 1,
"command": "fxaccounts:device_disconnected",
"data": {
"id": dev.device_id,
},
}))
.expect("serde failed");
let _ = self.push_one("password_reset", None, dev, self.default_ttl, Some(&msg)).await;
}
}
pub(crate) async fn push_any(&self, db: &DbConn, to: &[Device], ttl: Duration, payload: Value) {
self.push_all("push_any", Some(db), to, ttl, &payload).await;
}
}
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