assertThat(source.readUtf8()).isEqualTo("Hello")
      assertThat(response.trailers()).isEqualTo(headersOf("t1", "v2"))
    }

    val call2 = client.newCall(Request(server.url("/")))
    call2.execute().use { response ->
      val source = response.body.source()
      assertThat(response.header("h1")).isEqualTo("v1")
      assertThat(source.readUtf8()).isEqualTo("Hello")

     *
     * @param path
     *            The path. Must not be {@literal null} or empty.
     * @return The text read from the file.
     */
    public static String readUTF8(final String path) {
        assertArgumentNotEmpty("path", path);
        return readText(path, UTF8);
    }

    /**
     * Reads text from a file in UTF-8 encoding.
     *
     * @param file

            try (CurlResponse response = ComponentUtil.getCurlHelper()
                    .post("/_configsync/file")
                    .param("path", dictFile.getPath())
                    .body(FileUtil.readUTF8(file))
                    .execute()) {
                final Map<String, Object> contentMap = response.getContent(OpenSearchCurl.jsonParser());

        assertThat(bytes, is("あいうえお".getBytes("UTF-8")));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testReadUTF8() throws Exception {
        assertThat(FileUtil.readUTF8(getPath("hoge_utf8.txt")), is("あ"));
    }

    /**
     * Test isPathSafe with safe path
     *
     * @throws Exception
     */
    @Test
    public void testIsPathSafe_SafePath() throws Exception {

            final String autoExpandReplicas) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        String source = FileUtil.readUTF8(indexConfigFile);
        String dictionaryPath = System.getProperty("fess.dictionary.path", StringUtil.EMPTY);
        if (StringUtil.isNotBlank(dictionaryPath) && !dictionaryPath.endsWith("/")) {