TIKA-4542: replace File.createTempFile to Files.createTempFile to reduce the read permission to local user, as suggested by Simon Steiner

Author: THausherr

tika-grpc/src/main/java/org/apache/tika/pipes/grpc/TikaGrpcServer.java

@@ -21,6 +21,7 @@
 import java.io.File;
 import java.io.FileWriter;
 import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
 import java.util.concurrent.TimeUnit;
 
 import com.beust.jcommander.JCommander;
@@ -90,7 +91,7 @@ public void start() throws Exception {
         }
         if (tikaConfigXml == null) {
             // Create a default tika config
-            tikaConfigXml = File.createTempFile("tika-config", ".xml");
+            tikaConfigXml = Files.createTempFile("tika-config", ".xml").toFile();
             try (FileWriter fw = new FileWriter(tikaConfigXml, StandardCharsets.UTF_8)) {
                 TikaConfigSerializer.serialize(new TikaConfig(), TikaConfigSerializer.Mode.STATIC_FULL, fw, StandardCharsets.UTF_8);
             }

tika-grpc/src/main/java/org/apache/tika/pipes/grpc/TikaGrpcServerImpl.java

@@ -21,6 +21,7 @@
 import java.io.IOException;
 import java.lang.reflect.InvocationTargetException;
 import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
 import java.util.HashMap;
 import java.util.LinkedHashMap;
 import java.util.List;
@@ -103,7 +104,7 @@ class TikaGrpcServerImpl extends TikaGrpc.TikaImplBase {
             TransformerException, SAXException {
         File tikaConfigFile = new File(tikaConfigPath);
         if (!tikaConfigFile.canWrite()) {
-            File tmpTikaConfigFile = File.createTempFile("configCopy", tikaConfigFile.getName());
+            File tmpTikaConfigFile = Files.createTempFile("configCopy", tikaConfigFile.getName()).toFile();
             tmpTikaConfigFile.deleteOnExit();
             LOG.info("Tika config file {} is read-only. Making a temporary copy to {}", tikaConfigFile, tmpTikaConfigFile);
             String tikaConfigFileContents = FileUtils.readFileToString(tikaConfigFile, StandardCharsets.UTF_8);