String path = request.getPath();
    try {
      if (!path.startsWith("/") || path.contains("..")) throw new FileNotFoundException();

      File file = new File(root + path);
      return file.isDirectory()
          ? directoryToResponse(path, file)
          : fileToResponse(path, file);
    } catch (FileNotFoundException e) {
      return new MockResponse()
          .setStatus("HTTP/1.1 404")

import com.google.j2objc.annotations.J2ObjCIncompatible;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.RandomAccessFile;

import okhttp3.internal.isCivilized
import okhttp3.internal.okHttpName
import okhttp3.internal.platform.Platform
import okhttp3.internal.platform.Platform.Companion.WARN
import okio.BufferedSink
import okio.FileNotFoundException
import okio.FileSystem
import okio.ForwardingFileSystem
import okio.ForwardingSource
import okio.Path
import okio.Sink
import okio.Source
import okio.blackholeSink
import okio.buffer

/**

import com.google.common.annotations.J2ktIncompatible;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.internal.Finalizer;
import java.io.Closeable;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.lang.ref.PhantomReference;
import java.lang.ref.Reference;
import java.lang.ref.ReferenceQueue;
import java.lang.reflect.Method;
import java.net.URL;

import com.google.common.primitives.Bytes;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel.MapMode;

import assertk.assertions.isFalse
import assertk.assertions.isNull
import assertk.assertions.isSameInstanceAs
import assertk.assertions.isTrue
import assertk.fail
import java.io.File
import java.io.FileNotFoundException
import java.io.IOException
import java.util.ArrayDeque
import kotlin.test.assertFailsWith
import okhttp3.TestUtil
import okhttp3.internal.cache.DiskLruCache.Editor

          throw FileNotFoundException()
        }
      }
    val request =
      Request(
        url = server.url("/"),
        body = body,
      )
    client =
      client
        .newBuilder()
        .dns(DoubleInetAddressDns())
        .build()
    executeSynchronously(request)
      .assertFailure(FileNotFoundException::class.java)