diff --git a/app/src/main/java/com/bartlomiejpluta/ttsserver/core/lua/lib/TTSLibrary.kt b/app/src/main/java/com/bartlomiejpluta/ttsserver/core/lua/lib/TTSLibrary.kt
index 1bf64ce..b8f8e3c 100644
--- a/app/src/main/java/com/bartlomiejpluta/ttsserver/core/lua/lib/TTSLibrary.kt
+++ b/app/src/main/java/com/bartlomiejpluta/ttsserver/core/lua/lib/TTSLibrary.kt
@@ -3,11 +3,10 @@ package com.bartlomiejpluta.ttsserver.core.lua.lib
 import cafe.adriel.androidaudioconverter.model.AudioFormat
 import com.bartlomiejpluta.ttsserver.core.tts.engine.TTSEngine
 import org.luaj.vm2.LuaNil
-import org.luaj.vm2.LuaString
 import org.luaj.vm2.LuaValue
 import org.luaj.vm2.lib.ThreeArgFunction
 import org.luaj.vm2.lib.TwoArgFunction
-import java.lang.IllegalArgumentException
+import org.luaj.vm2.lib.jse.CoerceJavaToLua
 import java.util.*
 
 class TTSLibrary(private val ttsEngine: TTSEngine) : TwoArgFunction() {
@@ -42,7 +41,7 @@ class TTSLibrary(private val ttsEngine: TTSEngine) : TwoArgFunction() {
 
          val file = ttsEngine.createTTSFile(text.checkjstring(), lang, audioFormat)
 
-         return LuaValue.valueOf(file.absolutePath)
+         return CoerceJavaToLua.coerce(file)
       }
    }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/bartlomiejpluta/ttsserver/core/tts/engine/TTSEngine.kt b/app/src/main/java/com/bartlomiejpluta/ttsserver/core/tts/engine/TTSEngine.kt
index 4fb5d96..d7c3634 100644
--- a/app/src/main/java/com/bartlomiejpluta/ttsserver/core/tts/engine/TTSEngine.kt
+++ b/app/src/main/java/com/bartlomiejpluta/ttsserver/core/tts/engine/TTSEngine.kt
@@ -10,14 +10,11 @@ import cafe.adriel.androidaudioconverter.model.AudioFormat
 import com.bartlomiejpluta.ttsserver.core.tts.exception.TTSException
 import com.bartlomiejpluta.ttsserver.core.tts.listener.GongListener
 import com.bartlomiejpluta.ttsserver.core.tts.listener.TTSProcessListener
-import com.bartlomiejpluta.ttsserver.core.tts.model.TTSStream
 import com.bartlomiejpluta.ttsserver.core.tts.status.TTSStatus
 import com.bartlomiejpluta.ttsserver.core.tts.status.TTSStatusHolder
 import com.bartlomiejpluta.ttsserver.core.util.AudioConverter
 import com.bartlomiejpluta.ttsserver.ui.preference.key.PreferenceKey
-import java.io.BufferedInputStream
 import java.io.File
-import java.io.FileInputStream
 import java.security.MessageDigest
 import java.util.*
 
@@ -33,7 +30,11 @@ class TTSEngine(
    val status: TTSStatus
       get() = ttsStatusHolder.status
 
-   fun createTTSFile(text: String, language: Locale, audioFormat: AudioFormat = AudioFormat.WAV): File {
+   fun createTTSFile(
+      text: String,
+      language: Locale,
+      audioFormat: AudioFormat = AudioFormat.WAV
+   ): File {
       val digest = hash(text, language)
       val targetFilename = "tts_$digest.${audioFormat.format}"
       val wavFilename = "tts_$digest.wav"
@@ -68,26 +69,6 @@ class TTSEngine(
       return digest.fold("", { str, it -> str + "%02x".format(it) })
    }
 
-   fun fetchTTSStream(text: String, language: Locale, audioFormat: AudioFormat = AudioFormat.WAV): TTSStream {
-      val file = createTempFile("tmp_tts_server", ".wav")
-
-      val uuid = UUID.randomUUID().toString()
-      val listener = TTSProcessListener(uuid)
-      tts.setOnUtteranceProgressListener(listener)
-
-      tts.language = language
-      tts.synthesizeToFile(text, null, file, uuid)
-      listener.await()
-
-      val converted = convertFile(file, audioFormat)
-      val stream = BufferedInputStream(FileInputStream(converted))
-      val length = converted.length()
-
-      file.delete()
-
-      return TTSStream(stream, length)
-   }
-
    fun performTTS(text: String, language: Locale) {
       val uuid = UUID.randomUUID().toString()
       val listener = TTSProcessListener(uuid)
diff --git a/app/src/main/java/com/bartlomiejpluta/ttsserver/core/web/endpoint/DefaultEndpoint.kt b/app/src/main/java/com/bartlomiejpluta/ttsserver/core/web/endpoint/DefaultEndpoint.kt
index e5f9b64..5ba508d 100644
--- a/app/src/main/java/com/bartlomiejpluta/ttsserver/core/web/endpoint/DefaultEndpoint.kt
+++ b/app/src/main/java/com/bartlomiejpluta/ttsserver/core/web/endpoint/DefaultEndpoint.kt
@@ -4,6 +4,7 @@ import com.bartlomiejpluta.ttsserver.core.web.dto.Request
 import com.bartlomiejpluta.ttsserver.core.web.uri.UriTemplate
 import fi.iki.elonen.NanoHTTPD.*
 import org.luaj.vm2.*
+import org.luaj.vm2.lib.jse.CoerceLuaToJava
 import java.io.BufferedInputStream
 import java.io.File
 import java.io.FileInputStream
@@ -24,10 +25,10 @@ class DefaultEndpoint(
       .let { provideResponse(it) }
 
 
-   private fun provideResponse(response: LuaTable) = when {
-      response.get("data") !is LuaNil -> getTextResponse(response)
-      response.get("file") !is LuaNil -> getFileResponse(response)
-      else -> throw IllegalArgumentException("Provide 'data' or 'file' in response table")
+   private fun provideResponse(response: LuaTable) = when (response.get("data")) {
+      is LuaString -> getTextResponse(response)
+      is LuaUserdata -> getFileResponse(response)
+      else -> throw IllegalArgumentException("Supported only string and file data types")
    }
 
    private fun getTextResponse(response: LuaTable) = newFixedLengthResponse(
@@ -37,9 +38,14 @@ class DefaultEndpoint(
    )
 
    private fun getFileResponse(response: LuaTable): Response? {
-      val file = File(response.get("file").checkjstring())
+      val file = CoerceLuaToJava.coerce(response.get("data"), File::class.java) as File
       val stream = BufferedInputStream(FileInputStream(file))
       val length = file.length()
+
+      if(!getCached(response)) {
+         file.delete()
+      }
+
       return newFixedLengthResponse(
          getStatus(response),
          getMimeType(response),
@@ -60,5 +66,7 @@ class DefaultEndpoint(
 
    private fun getData(response: LuaTable) = response.get("data").checkjstring()
 
+   private fun getCached(response: LuaTable) = response.get("cached").optboolean(false)
+
    override fun toString() = "D[${uri.template}]"
 }
\ No newline at end of file