Fix to copy to FileChannel directly

app/src/main/kotlin/com/hippo/ehviewer/client/EhTagDatabase.kt

@@ -24,13 +24,11 @@ import com.hippo.ehviewer.R
 import com.hippo.ehviewer.util.AppConfig
 import com.hippo.ehviewer.util.FileUtils
 import com.hippo.ehviewer.util.StatusCodeException
+import com.hippo.ehviewer.util.copyTo
 import io.ktor.client.HttpClient
 import io.ktor.client.request.prepareGet
 import io.ktor.client.statement.bodyAsChannel
 import io.ktor.http.isSuccess
-import io.ktor.util.cio.writeChannel
-import io.ktor.utils.io.close
-import io.ktor.utils.io.copyTo
 import java.io.File
 import java.nio.charset.StandardCharsets
 import kotlinx.coroutines.CoroutineScope
@@ -183,12 +181,7 @@ object EhTagDatabase : CoroutineScope {
         runCatching {
             client.prepareGet(url).execute {
                 if (it.status.isSuccess()) {
-                    val channel = file.writeChannel()
-                    try {
-                        it.bodyAsChannel().copyTo(channel)
-                    } finally {
-                        channel.close()
-                    }
+                    it.bodyAsChannel().copyTo(file)
                 } else {
                     throw StatusCodeException(it.status.value)
                 }

app/src/main/kotlin/com/hippo/ehviewer/updater/AppUpdater.kt

@@ -4,13 +4,11 @@ import com.hippo.ehviewer.BuildConfig
 import com.hippo.ehviewer.EhApplication.Companion.ktorClient
 import com.hippo.ehviewer.Settings
 import com.hippo.ehviewer.client.executeAndParseAs
+import com.hippo.ehviewer.util.copyTo
 import io.ktor.client.request.header
 import io.ktor.client.request.prepareGet
 import io.ktor.client.statement.bodyAsChannel
 import io.ktor.client.statement.bodyAsText
-import io.ktor.util.cio.writeChannel
-import io.ktor.utils.io.close
-import io.ktor.utils.io.copyTo
 import io.ktor.utils.io.jvm.javaio.toInputStream
 import java.io.File
 import java.util.zip.ZipInputStream
@@ -81,12 +79,7 @@ object AppUpdater {
                     }
                 }
             } else {
-                val channel = file.writeChannel()
-                try {
-                    response.bodyAsChannel().copyTo(channel)
-                } finally {
-                    channel.close()
-                }
+                response.bodyAsChannel().copyTo(file)
             }
         }
 }

app/src/main/kotlin/com/hippo/ehviewer/util/FileUtils.kt

@@ -15,7 +15,10 @@
  */
 package com.hippo.ehviewer.util
 
+import io.ktor.utils.io.ByteReadChannel
+import io.ktor.utils.io.jvm.nio.copyTo
 import java.io.File
+import java.io.RandomAccessFile
 import java.util.Locale
 import kotlin.math.ln
 import kotlin.math.pow
@@ -153,3 +156,9 @@ object FileUtils {
         return null
     }
 }
+
+suspend fun ByteReadChannel.copyTo(file: File) {
+    RandomAccessFile(file, "rw").use {
+        copyTo(it.channel)
+    }
+}