IoUtils.java

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package io.grpc.internal;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

/** Common IoUtils for thrift and nanopb to convert inputstream to bytes. */
public final class IoUtils {

  /** maximum buffer to be read is 16 KB. */
  private static final int MAX_BUFFER_LENGTH = 16384; 
  
  /** Returns the byte array. */
  public static byte[] toByteArray(InputStream is) throws IOException {
    ByteArrayOutputStream buffer = new ByteArrayOutputStream();
    int nRead;
    byte[] bytes = new byte[MAX_BUFFER_LENGTH];

    while ((nRead = is.read(bytes, 0, bytes.length)) != -1) {
      buffer.write(bytes, 0, nRead);
    }

    buffer.flush();
    return buffer.toByteArray();
  }
}