@Test void conditionalRequests() {
    List.of("/zipkin/config.json", "/zipkin/index.html", "/zipkin/test.txt").forEach(path -> {
      try {
        String etag = get(path).header("etag");
        assertThat(conditionalGet(path, etag).code())
          .isEqualTo(304);
        assertThat(conditionalGet(path, "aargh").code())
          .isEqualTo(200);
      } catch (IOException e) {
        throw new UncheckedIOException(e);
      }
    });
  }
Browsers honor conditional requests such as eTag. Let's make sure the server does
zipkin-server/src/test/java/zipkin2/server/internal/ui/ITZipkinUiConfiguration.java