com.undefinedlabs.scope.utils.ScopeIOUtils Maven / Gradle / Ivy

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package com.undefinedlabs.scope.utils;

import com.undefinedlabs.scope.logger.ScopeLogger;
import com.undefinedlabs.scope.logger.ScopeLoggerResolver;
import com.undefinedlabs.scope.settings.ScopeSettings;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import org.apache.commons.lang3.StringUtils;

public class ScopeIOUtils {

  private static final ScopeLogger LOGGER = ScopeLoggerResolver.INSTANCE.get();

  public static String getSubstring(final InputStream byteStream) {
    return getSubstring(byteStream, ScopeSettings.HTTP_MAX_PAYLOAD_CHARS, StandardCharsets.UTF_8);
  }

  public static String getSubstring(
      final InputStream byteStream, final int maxChars, final Charset charset) {

    try {
      byteStream.mark(maxChars);
      final byte[] buf = new byte[maxChars];
      final int length = byteStream.read(buf);
      final String string = (length > 0) ? new String(buf, 0, length, charset) : "";
      return (StringUtils.isNotEmpty(string)) ? StringUtils.abbreviate(string, maxChars) : "";
    } catch (final IOException e) {
      LOGGER.error("Could not be possible to get data from InputStream. " + e.getMessage());
      return "";
    } finally {
      try {
        byteStream.reset();
      } catch (final IOException e) {
        LOGGER.debug("Could not be possible to reset the InputStream. " + e.getMessage());
      }
    }
  }
}