package com.yutou.nas.utils;

import java.io.*;
import java.nio.ByteBuffer;
import java.security.MessageDigest;

public class StreamTools {
    public static String streamReadLine(InputStream stream) {
        StringBuilder builder = new StringBuilder();
        try {
            BufferedReader reader = new BufferedReader(new InputStreamReader(stream));
            String tmp;
            while ((tmp = reader.readLine()) != null) {
                builder.append(tmp);
            }
            reader.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return builder.toString();
    }

    public static File streamSave(InputStream stream) {
        try {
            if (stream != null) {
                File file = new File("tmp" + File.separator + System.currentTimeMillis());
                FileOutputStream outputStream = new FileOutputStream(file);
                byte[] bytes = new byte[2048];
                int len;
                while ((len = stream.read(bytes)) > -1) {
                    outputStream.write(bytes, 0, len);
                }
                outputStream.flush();
                stream.close();
                outputStream.close();
                return file;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
    public static byte[] fileToByte(File file){
        byte[] buffer = new byte[1024];
        ByteArrayOutputStream outputStream=new ByteArrayOutputStream();
        int len;
        try {
            FileInputStream in = new FileInputStream(file);
            while ((len = in.read(buffer, 0, 1024)) != -1) {
                outputStream.write(buffer,0,len);
            }
            in.close();
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
        return outputStream.toByteArray();
    }
}