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https://github.com/binwiederhier/ntfy-android.git
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Locking around UP registration, #230
This commit is contained in:
Philipp Heckel
parent
a2551bc7f0
commit
821a1ac222
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@ -11,7 +11,10 @@ import io.heckel.ntfy.util.randomString
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import io.heckel.ntfy.util.topicUrlUp
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import kotlinx.coroutines.Dispatchers
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import kotlinx.coroutines.GlobalScope
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import kotlinx.coroutines.delay
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import kotlinx.coroutines.launch
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import kotlinx.coroutines.sync.Mutex
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import kotlinx.coroutines.sync.withLock
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import java.util.*
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import kotlin.random.Random
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@ -44,46 +47,51 @@ class BroadcastReceiver : android.content.BroadcastReceiver() {
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return
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}
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GlobalScope.launch(Dispatchers.IO) {
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val existingSubscription = repository.getSubscriptionByConnectorToken(connectorToken)
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if (existingSubscription != null) {
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if (existingSubscription.upAppId == appId) {
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val endpoint = topicUrlUp(existingSubscription.baseUrl, existingSubscription.topic)
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Log.d(TAG, "Subscription with connectorToken $connectorToken exists. Sending endpoint $endpoint.")
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distributor.sendEndpoint(appId, connectorToken, endpoint)
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} else {
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Log.d(TAG, "Subscription with connectorToken $connectorToken exists for a different app. Refusing registration.")
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distributor.sendRegistrationFailed(appId, connectorToken, "Connector token already exists")
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// We're doing all of this inside a critical section, because of possible races.
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// See https://github.com/binwiederhier/ntfy/issues/230 for details.
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mutex.withLock {
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val existingSubscription = repository.getSubscriptionByConnectorToken(connectorToken)
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if (existingSubscription != null) {
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if (existingSubscription.upAppId == appId) {
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val endpoint = topicUrlUp(existingSubscription.baseUrl, existingSubscription.topic)
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Log.d(TAG, "Subscription with connectorToken $connectorToken exists. Sending endpoint $endpoint.")
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distributor.sendEndpoint(appId, connectorToken, endpoint)
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} else {
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Log.d(TAG, "Subscription with connectorToken $connectorToken exists for a different app. Refusing registration.")
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distributor.sendRegistrationFailed(appId, connectorToken, "Connector token already exists")
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}
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return@launch
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}
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return@launch
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}
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// Add subscription
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val baseUrl = repository.getDefaultBaseUrl() ?: context.getString(R.string.app_base_url)
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val topic = UP_PREFIX + randomString(TOPIC_RANDOM_ID_LENGTH)
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val endpoint = topicUrlUp(baseUrl, topic)
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val subscription = Subscription(
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id = Random.nextLong(),
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baseUrl = baseUrl,
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topic = topic,
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instant = true, // No Firebase, always instant!
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mutedUntil = 0,
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upAppId = appId,
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upConnectorToken = connectorToken,
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totalCount = 0,
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newCount = 0,
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lastActive = Date().time/1000
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)
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Log.d(TAG, "Adding subscription with for app $appId (connectorToken $connectorToken): $subscription")
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try {
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// Note, this may fail due to a SQL constraint exception, see https://github.com/binwiederhier/ntfy/issues/185
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repository.addSubscription(subscription)
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distributor.sendEndpoint(appId, connectorToken, endpoint)
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// Add subscription
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val baseUrl = repository.getDefaultBaseUrl() ?: context.getString(R.string.app_base_url)
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val topic = UP_PREFIX + randomString(TOPIC_RANDOM_ID_LENGTH)
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val endpoint = topicUrlUp(baseUrl, topic)
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val subscription = Subscription(
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id = Random.nextLong(),
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baseUrl = baseUrl,
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topic = topic,
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instant = true, // No Firebase, always instant!
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mutedUntil = 0,
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upAppId = appId,
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upConnectorToken = connectorToken,
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totalCount = 0,
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newCount = 0,
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lastActive = Date().time/1000
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)
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Log.d(TAG, "Adding subscription with for app $appId (connectorToken $connectorToken): $subscription")
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try {
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// Note, this may fail due to a SQL constraint exception, see https://github.com/binwiederhier/ntfy/issues/185
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repository.addSubscription(subscription)
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distributor.sendEndpoint(appId, connectorToken, endpoint)
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// Refresh (and maybe start) foreground service
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SubscriberServiceManager.refresh(app)
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} catch (e: Exception) {
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Log.w(TAG, "Failed to add subscription", e)
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distributor.sendRegistrationFailed(appId, connectorToken, e.message)
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// Refresh (and maybe start) foreground service
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SubscriberServiceManager.refresh(app)
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} catch (e: Exception) {
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Log.w(TAG, "Failed to add subscription", e)
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distributor.sendRegistrationFailed(appId, connectorToken, e.message)
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}
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}
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}
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}
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@ -95,19 +103,24 @@ class BroadcastReceiver : android.content.BroadcastReceiver() {
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val distributor = Distributor(app)
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Log.d(TAG, "UNREGISTER received (connectorToken=$connectorToken)")
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GlobalScope.launch(Dispatchers.IO) {
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val existingSubscription = repository.getSubscriptionByConnectorToken(connectorToken)
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if (existingSubscription == null) {
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Log.d(TAG, "Subscription with connectorToken $connectorToken does not exist. Ignoring.")
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return@launch
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// We're doing all of this inside a critical section, because of possible races.
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// See https://github.com/binwiederhier/ntfy/issues/230 for details.
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mutex.withLock {
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val existingSubscription = repository.getSubscriptionByConnectorToken(connectorToken)
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if (existingSubscription == null) {
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Log.d(TAG, "Subscription with connectorToken $connectorToken does not exist. Ignoring.")
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return@launch
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}
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// Remove subscription
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Log.d(TAG, "Removing subscription ${existingSubscription.id} with connectorToken $connectorToken")
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repository.removeSubscription(existingSubscription.id)
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existingSubscription.upAppId?.let { appId -> distributor.sendUnregistered(appId, connectorToken) }
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// Refresh (and maybe stop) foreground service
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SubscriberServiceManager.refresh(context)
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}
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// Remove subscription
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Log.d(TAG, "Removing subscription ${existingSubscription.id} with connectorToken $connectorToken")
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repository.removeSubscription(existingSubscription.id)
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existingSubscription.upAppId?.let { appId -> distributor.sendUnregistered(appId, connectorToken) }
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// Refresh (and maybe stop) foreground service
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SubscriberServiceManager.refresh(context)
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}
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}
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@ -115,5 +128,7 @@ class BroadcastReceiver : android.content.BroadcastReceiver() {
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private const val TAG = "NtfyUpBroadcastRecv"
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private const val UP_PREFIX = "up"
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private const val TOPIC_RANDOM_ID_LENGTH = 12
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val mutex = Mutex() // https://github.com/binwiederhier/ntfy/issues/230
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}
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}
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@ -6,6 +6,7 @@ Bugs:
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* Make messages with links selectable (#226, thanks to @StoyanDimitrov for reporting)
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* Restoring topics or settings from backup doesn't work (#223, thanks to @shadow00 for reporting)
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* Fix app icon on old Android versions (#120, thanks to @shadow00 for reporting)
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* Fix races in UnifiedPush registration (#230, thanks to @Jakob for reporting)
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**Thanks for testing:**
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