Fixed code with empty data for detection and updated gradle version

Author: alekseinovikov

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.5.1-all.zip

src/main/kotlin/org/ktypeparser/processors/FileHelper.kt

@@ -11,19 +11,20 @@ import java.nio.file.Files
 import java.nio.file.Paths
 import java.util.*
 
-internal fun deleteTempFile(file: File) = file.delete()
+internal fun deleteTempFile(file: File?) = file?.delete()
 
 internal suspend fun deleteTempFileAsync(file: File) = GlobalScope.launch { file.delete() }
 
-internal suspend fun createTempFileAsync(bytes: ByteArray): Deferred<File> =
+internal suspend fun createTempFileAsync(bytes: ByteArray): Deferred<File?> =
     GlobalScope.async { createTempFile(bytes) }
 
-internal suspend fun createTempFileAsync(inputStream: InputStream): Deferred<File> =
+internal suspend fun createTempFileAsync(inputStream: InputStream): Deferred<File?> =
     GlobalScope.async { createTempFile(inputStream) }
 
-internal fun createTempFile(bytes: ByteArray): File = createTempFile(ByteArrayInputStream(bytes))
+internal fun createTempFile(bytes: ByteArray): File? =
+    bytes.takeIf { it.isNotEmpty() }?.let { createTempFile(ByteArrayInputStream(it)) }
 
-internal fun createTempFile(inputStream: InputStream): File = inputStream.use {
+internal fun createTempFile(inputStream: InputStream): File? = inputStream.takeIf { it.available() > 0 }?.use {
     val outputTempFilePath = "$tempDirectory/$randomName"
     Files.copy(it, Paths.get(outputTempFilePath))
 

src/main/kotlin/org/ktypeparser/processors/MediaTypeAsyncDetector.kt

@@ -19,13 +19,17 @@ internal object MediaTypeAsyncDetector {
 
     suspend fun detectAsync(bytes: ByteArray): Deferred<MediaType?> {
         val file = createTempFileAsync(bytes)
-        return file.await().toPath().detectAsync()
+        return file.await()?.toPath().detectAsync()
     }
 
     suspend fun detectAsync(inputStream: InputStream): Deferred<MediaType?> =
-        createTempFileAsync(inputStream).await().toPath().detectAsync()
-
-    private suspend fun Path.detectAsync() =
-        GlobalScope.async { mimeTypeDetector.detectMimeTypeAsync(this@detectAsync).await().parseMediaType() }
+        createTempFileAsync(inputStream).await()?.toPath().detectAsync()
+
+    private suspend fun Path?.detectAsync() =
+        GlobalScope.async {
+            this@detectAsync?.let {
+                mimeTypeDetector.detectMimeTypeAsync(it).await().parseMediaType()
+            }
+        }
 
 }

src/main/kotlin/org/ktypeparser/processors/MediaTypeSyncDetector.kt

@@ -24,8 +24,8 @@ internal object MediaTypeSyncDetector {
         }
     }
 
-    fun detect(file: File): MediaType? {
-        return parseMediaType(file)
+    fun detect(file: File?): MediaType? {
+        return file?.let { parseMediaType(it) }
     }
 
     private fun parseMediaType(file: File): MediaType? = mimeTypeDetector.detectMimeType(file)?.parseMediaType()