2 files changed, 39 insertions, 0 deletions
diff --git a/android/service/src/main/kotlin/net/mullvad/mullvadvpn/service/DaemonInstance.kt b/android/service/src/main/kotlin/net/mullvad/mullvadvpn/service/DaemonInstance.kt
index 236cdeb84a..8cc292fb95 100644
--- a/android/service/src/main/kotlin/net/mullvad/mullvadvpn/service/DaemonInstance.kt
+++ b/android/service/src/main/kotlin/net/mullvad/mullvadvpn/service/DaemonInstance.kt
@@ -1,5 +1,6 @@
 package net.mullvad.mullvadvpn.service
 
+import java.io.File
 import kotlin.properties.Delegates.observable
 import kotlin.reflect.KClass
 import kotlin.reflect.safeCast
@@ -13,6 +14,8 @@ import kotlinx.coroutines.channels.trySendBlocking
 import net.mullvad.mullvadvpn.lib.common.util.Intermittent
 import net.mullvad.mullvadvpn.lib.endpoint.ApiEndpointConfiguration
 
+private const val RELAYS_FILE = "relays.json"
+
 class DaemonInstance(private val vpnService: MullvadVpnService) {
     sealed class Command {
         data class Start(val apiEndpointConfiguration: ApiEndpointConfiguration) : Command()
@@ -44,6 +47,8 @@ class DaemonInstance(private val vpnService: MullvadVpnService) {
         GlobalScope.actor(Dispatchers.Default, Channel.UNLIMITED) {
             var isRunning = true
 
+            prepareFiles()
+
             while (isRunning) {
                 val startCommand = waitForCommand(channel, Command.Start::class) ?: break
                 startDaemon(startCommand.apiEndpointConfiguration)
@@ -67,6 +72,13 @@ class DaemonInstance(private val vpnService: MullvadVpnService) {
         }
     }
 
+    private fun prepareFiles() {
+        val shouldOverwriteRelayList =
+            lastUpdatedTime() > File(vpnService.filesDir, RELAYS_FILE).lastModified()
+
+        FileResourceExtractor(vpnService).apply { extract(RELAYS_FILE, shouldOverwriteRelayList) }
+    }
+
     private suspend fun startDaemon(apiEndpointConfiguration: ApiEndpointConfiguration) {
         val newDaemon =
             MullvadDaemon(vpnService, apiEndpointConfiguration).apply {
@@ -83,4 +95,8 @@ class DaemonInstance(private val vpnService: MullvadVpnService) {
     private fun stopDaemon() {
         daemon?.shutdown()
     }
+
+    private fun lastUpdatedTime(): Long {
+        return vpnService.run { packageManager.getPackageInfo(packageName, 0).lastUpdateTime }
+    }
 }
diff --git a/android/service/src/main/kotlin/net/mullvad/mullvadvpn/service/FileResourceExtractor.kt b/android/service/src/main/kotlin/net/mullvad/mullvadvpn/service/FileResourceExtractor.kt
new file mode 100644
index 0000000000..71a05e6743
--- /dev/null
+++ b/android/service/src/main/kotlin/net/mullvad/mullvadvpn/service/FileResourceExtractor.kt
@@ -0,0 +1,23 @@
+package net.mullvad.mullvadvpn.service
+
+import android.content.Context
+import java.io.File
+import java.io.FileOutputStream
+
+class FileResourceExtractor(val context: Context) {
+    fun extract(asset: String, force: Boolean = false) {
+        val destination = File(context.filesDir, asset)
+
+        if (!destination.exists() || force) {
+            extractFile(asset, destination)
+        }
+    }
+
+    private fun extractFile(asset: String, destination: File) {
+        val destinationStream = FileOutputStream(destination)
+
+        context.assets.open(asset).copyTo(destinationStream)
+
+        destinationStream.close()
+    }
+}