ntfy/server/webpush_store.go

281 lines
8.9 KiB
Go

package server
import (
"database/sql"
"errors"
"git.zio.sh/astra/ntfy/v2/util"
"net/netip"
"time"
_ "github.com/mattn/go-sqlite3" // SQLite driver
)
const (
subscriptionIDPrefix = "wps_"
subscriptionIDLength = 10
subscriptionEndpointLimitPerSubscriberIP = 10
)
var (
errWebPushNoRows = errors.New("no rows found")
errWebPushTooManySubscriptions = errors.New("too many subscriptions")
errWebPushUserIDCannotBeEmpty = errors.New("user ID cannot be empty")
)
const (
createWebPushSubscriptionsTableQuery = `
BEGIN;
CREATE TABLE IF NOT EXISTS subscription (
id TEXT PRIMARY KEY,
endpoint TEXT NOT NULL,
key_auth TEXT NOT NULL,
key_p256dh TEXT NOT NULL,
user_id TEXT NOT NULL,
subscriber_ip TEXT NOT NULL,
updated_at INT NOT NULL,
warned_at INT NOT NULL DEFAULT 0
);
CREATE UNIQUE INDEX IF NOT EXISTS idx_endpoint ON subscription (endpoint);
CREATE INDEX IF NOT EXISTS idx_subscriber_ip ON subscription (subscriber_ip);
CREATE TABLE IF NOT EXISTS subscription_topic (
subscription_id TEXT NOT NULL,
topic TEXT NOT NULL,
PRIMARY KEY (subscription_id, topic),
FOREIGN KEY (subscription_id) REFERENCES subscription (id) ON DELETE CASCADE
);
CREATE INDEX IF NOT EXISTS idx_topic ON subscription_topic (topic);
CREATE TABLE IF NOT EXISTS schemaVersion (
id INT PRIMARY KEY,
version INT NOT NULL
);
COMMIT;
`
builtinStartupQueries = `
PRAGMA foreign_keys = ON;
`
selectWebPushSubscriptionIDByEndpoint = `SELECT id FROM subscription WHERE endpoint = ?`
selectWebPushSubscriptionCountBySubscriberIP = `SELECT COUNT(*) FROM subscription WHERE subscriber_ip = ?`
selectWebPushSubscriptionsForTopicQuery = `
SELECT id, endpoint, key_auth, key_p256dh, user_id
FROM subscription_topic st
JOIN subscription s ON s.id = st.subscription_id
WHERE st.topic = ?
ORDER BY endpoint
`
selectWebPushSubscriptionsExpiringSoonQuery = `
SELECT id, endpoint, key_auth, key_p256dh, user_id
FROM subscription
WHERE warned_at = 0 AND updated_at <= ?
`
insertWebPushSubscriptionQuery = `
INSERT INTO subscription (id, endpoint, key_auth, key_p256dh, user_id, subscriber_ip, updated_at, warned_at)
VALUES (?, ?, ?, ?, ?, ?, ?, ?)
ON CONFLICT (endpoint)
DO UPDATE SET key_auth = excluded.key_auth, key_p256dh = excluded.key_p256dh, user_id = excluded.user_id, subscriber_ip = excluded.subscriber_ip, updated_at = excluded.updated_at, warned_at = excluded.warned_at
`
updateWebPushSubscriptionWarningSentQuery = `UPDATE subscription SET warned_at = ? WHERE id = ?`
deleteWebPushSubscriptionByEndpointQuery = `DELETE FROM subscription WHERE endpoint = ?`
deleteWebPushSubscriptionByUserIDQuery = `DELETE FROM subscription WHERE user_id = ?`
deleteWebPushSubscriptionByAgeQuery = `DELETE FROM subscription WHERE updated_at <= ?` // Full table scan!
insertWebPushSubscriptionTopicQuery = `INSERT INTO subscription_topic (subscription_id, topic) VALUES (?, ?)`
deleteWebPushSubscriptionTopicAllQuery = `DELETE FROM subscription_topic WHERE subscription_id = ?`
)
// Schema management queries
const (
currentWebPushSchemaVersion = 1
insertWebPushSchemaVersion = `INSERT INTO schemaVersion VALUES (1, ?)`
selectWebPushSchemaVersionQuery = `SELECT version FROM schemaVersion WHERE id = 1`
)
type webPushStore struct {
db *sql.DB
}
func newWebPushStore(filename, startupQueries string) (*webPushStore, error) {
db, err := sql.Open("sqlite3", filename)
if err != nil {
return nil, err
}
if err := setupWebPushDB(db); err != nil {
return nil, err
}
if err := runWebPushStartupQueries(db, startupQueries); err != nil {
return nil, err
}
return &webPushStore{
db: db,
}, nil
}
func setupWebPushDB(db *sql.DB) error {
// If 'schemaVersion' table does not exist, this must be a new database
rows, err := db.Query(selectWebPushSchemaVersionQuery)
if err != nil {
return setupNewWebPushDB(db)
}
return rows.Close()
}
func setupNewWebPushDB(db *sql.DB) error {
if _, err := db.Exec(createWebPushSubscriptionsTableQuery); err != nil {
return err
}
if _, err := db.Exec(insertWebPushSchemaVersion, currentWebPushSchemaVersion); err != nil {
return err
}
return nil
}
func runWebPushStartupQueries(db *sql.DB, startupQueries string) error {
if _, err := db.Exec(startupQueries); err != nil {
return err
}
if _, err := db.Exec(builtinStartupQueries); err != nil {
return err
}
return nil
}
// UpsertSubscription adds or updates Web Push subscriptions for the given topics and user ID. It always first deletes all
// existing entries for a given endpoint.
func (c *webPushStore) UpsertSubscription(endpoint string, auth, p256dh, userID string, subscriberIP netip.Addr, topics []string) error {
tx, err := c.db.Begin()
if err != nil {
return err
}
defer tx.Rollback()
// Read number of subscriptions for subscriber IP address
rowsCount, err := tx.Query(selectWebPushSubscriptionCountBySubscriberIP, subscriberIP.String())
if err != nil {
return err
}
defer rowsCount.Close()
var subscriptionCount int
if !rowsCount.Next() {
return errWebPushNoRows
}
if err := rowsCount.Scan(&subscriptionCount); err != nil {
return err
}
if err := rowsCount.Close(); err != nil {
return err
}
// Read existing subscription ID for endpoint (or create new ID)
rows, err := tx.Query(selectWebPushSubscriptionIDByEndpoint, endpoint)
if err != nil {
return err
}
defer rows.Close()
var subscriptionID string
if rows.Next() {
if err := rows.Scan(&subscriptionID); err != nil {
return err
}
} else {
if subscriptionCount >= subscriptionEndpointLimitPerSubscriberIP {
return errWebPushTooManySubscriptions
}
subscriptionID = util.RandomStringPrefix(subscriptionIDPrefix, subscriptionIDLength)
}
if err := rows.Close(); err != nil {
return err
}
// Insert or update subscription
updatedAt, warnedAt := time.Now().Unix(), 0
if _, err = tx.Exec(insertWebPushSubscriptionQuery, subscriptionID, endpoint, auth, p256dh, userID, subscriberIP.String(), updatedAt, warnedAt); err != nil {
return err
}
// Replace all subscription topics
if _, err := tx.Exec(deleteWebPushSubscriptionTopicAllQuery, subscriptionID); err != nil {
return err
}
for _, topic := range topics {
if _, err = tx.Exec(insertWebPushSubscriptionTopicQuery, subscriptionID, topic); err != nil {
return err
}
}
return tx.Commit()
}
// SubscriptionsForTopic returns all subscriptions for the given topic
func (c *webPushStore) SubscriptionsForTopic(topic string) ([]*webPushSubscription, error) {
rows, err := c.db.Query(selectWebPushSubscriptionsForTopicQuery, topic)
if err != nil {
return nil, err
}
defer rows.Close()
return c.subscriptionsFromRows(rows)
}
// SubscriptionsExpiring returns all subscriptions that have not been updated for a given time period
func (c *webPushStore) SubscriptionsExpiring(warnAfter time.Duration) ([]*webPushSubscription, error) {
rows, err := c.db.Query(selectWebPushSubscriptionsExpiringSoonQuery, time.Now().Add(-warnAfter).Unix())
if err != nil {
return nil, err
}
defer rows.Close()
return c.subscriptionsFromRows(rows)
}
// MarkExpiryWarningSent marks the given subscriptions as having received a warning about expiring soon
func (c *webPushStore) MarkExpiryWarningSent(subscriptions []*webPushSubscription) error {
tx, err := c.db.Begin()
if err != nil {
return err
}
defer tx.Rollback()
for _, subscription := range subscriptions {
if _, err := tx.Exec(updateWebPushSubscriptionWarningSentQuery, time.Now().Unix(), subscription.ID); err != nil {
return err
}
}
return tx.Commit()
}
func (c *webPushStore) subscriptionsFromRows(rows *sql.Rows) ([]*webPushSubscription, error) {
subscriptions := make([]*webPushSubscription, 0)
for rows.Next() {
var id, endpoint, auth, p256dh, userID string
if err := rows.Scan(&id, &endpoint, &auth, &p256dh, &userID); err != nil {
return nil, err
}
subscriptions = append(subscriptions, &webPushSubscription{
ID: id,
Endpoint: endpoint,
Auth: auth,
P256dh: p256dh,
UserID: userID,
})
}
return subscriptions, nil
}
// RemoveSubscriptionsByEndpoint removes the subscription for the given endpoint
func (c *webPushStore) RemoveSubscriptionsByEndpoint(endpoint string) error {
_, err := c.db.Exec(deleteWebPushSubscriptionByEndpointQuery, endpoint)
return err
}
// RemoveSubscriptionsByUserID removes all subscriptions for the given user ID
func (c *webPushStore) RemoveSubscriptionsByUserID(userID string) error {
if userID == "" {
return errWebPushUserIDCannotBeEmpty
}
_, err := c.db.Exec(deleteWebPushSubscriptionByUserIDQuery, userID)
return err
}
// RemoveExpiredSubscriptions removes all subscriptions that have not been updated for a given time period
func (c *webPushStore) RemoveExpiredSubscriptions(expireAfter time.Duration) error {
_, err := c.db.Exec(deleteWebPushSubscriptionByAgeQuery, time.Now().Add(-expireAfter).Unix())
return err
}
// Close closes the underlying database connection
func (c *webPushStore) Close() error {
return c.db.Close()
}