apollo-core/src/main/java/com/ctrip/framework/foundation/internals/io/ProxyInputStream.java/ProxyInputStream/skip
class ProxyInputStream:  @Override
  public long skip(final long ln) throws IOException {
    try {
      return in.skip(ln);
    } catch (final IOException e) {
      handleIOException(e);
      return 0;
    }
  }