lightsetup/LightSetupMd5/Md5Release.cs

using LightSetupBase;
using LightSetupMd5;
using System.Text;
using System.Security.Cryptography;
using System.Collections.Generic;
using System;

namespace LightSetupMd5
{
    internal class Md5Release
    {
        public string GetMd5(Md5MainArgs arg, List<FileInfo> fileInfos)
        {
            List<Md5FileInfo> fileInfo = new List<Md5FileInfo>();
            foreach (FileInfo file in fileInfos)
            {
                fileInfo.Add(new Md5FileInfo(Md5(file), getFilePath(arg, file)));
            }
            return filesToMd5(fileInfo);
        }

        private string Md5(FileInfo file)
        {
            try
            {
                MD5 md5 = new MD5CryptoServiceProvider();
                byte[] retVal;

                using (FileStream fileStream = file.OpenRead())
                {
                    retVal = md5.ComputeHash(fileStream);
                    fileStream.Close();
                }

                StringBuilder sb = new StringBuilder();
                for (int i = 0; i < retVal.Length; i++)
                {
                    sb.Append(retVal[i].ToString("x2"));
                }
                string fileMd5 = sb.ToString();

                Console.WriteLine("文件" + file.FullName + "的md5值为" + fileMd5);

                return fileMd5;
            }
            catch (Exception ex)
            {
                throw new Exception("GetMD5HashFromFile() fail,error:" + ex.Message);
            }
        }

        private string getFilePath(Md5MainArgs arg, FileInfo file)
        {
            return file.FullName.Substring(arg.RunPath.Length);
        }

        private string filesToMd5(List<Md5FileInfo> fileInfo)
        {
            //升序
            fileInfo.Sort((a, b) => (a.Md5 + a.AbsolutePath).CompareTo(b.Md5 + b.AbsolutePath));

            StringBuilder sb = new StringBuilder();
            foreach (Md5FileInfo file in fileInfo)
            {
                if (sb.Length > 0)
                {
                    sb.Append(":");
                }
                sb.Append(file.Md5);
                sb.Append("_");
                sb.Append(file.AbsolutePath);
            }
            string md5 = textMd5(sb.ToString());

            Console.WriteLine("整个目录的md5值为:" + md5);

            return md5;
        }

        private string textMd5(string text)
        {
            StringBuilder sb = new StringBuilder();
            using (MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider())
            {
                byte[] data = md5.ComputeHash(Encoding.UTF8.GetBytes(text));
                int length = data.Length;
                for (int i = 0; i < length; i++)
                {
                    sb.Append(data[i].ToString("x2"));
                }
                return (sb.ToString());
            }
        }
    }
}