RoApp/Assets/Src/Core/DownLoad/FileHelper.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;
using UnityEngine;

public class FileHelper
{
    public static string[] SpiltData(string str)
    {
        List<string> ret = new List<string>();

        int size = str.Length;

        int startindex = 0;
        int endindex = 0;
        bool isSign = false;
        string it = null;
        for (int i = 0; i < size; i++)
        {
            if (str[i] == ',' && !isSign)
            {
                if (i >= 1 && str[i - 1] == ',')
                {
                    it = string.Empty;
                    ret.Add(it);
                    startindex = i + 1 < size ? i + 1 : i;
                    if (i == size - 1)
                    {
                        it = string.Empty;
                        ret.Add(it);
                    }
                }
                else
                {
                    endindex = i - 1 >= 0 ? i - 1 : 0;
                    it = RemoveHeadandTailChar(str.Substring(startindex, endindex - startindex + 1), '"');
                    ret.Add(it);
                    startindex = i + 1 < size ? i + 1 : i;
                }
            }
            else if (str[i] == '"' && ((i >= 1 && str[i - 1] == ',')
                    || (i + 1 < size && str[i + 1] == ',')))
            {
                isSign = !isSign;
            }
            else if (i == size - 1)
            {
                endindex = i;
                it = RemoveHeadandTailChar(str.Substring(startindex, endindex - startindex + 1), '"');
                ret.Add(it);
            }
        }

        return ret.ToArray();
    }

    public static string RemoveHeadandTailChar(string str, char ch)
    {
        if (str.Length < 2)
            return str;

        string ret = str;


        if (str.IndexOf(ch) == 0 && str.LastIndexOf(ch) == str.Length - 1)
        {
            ret = str.Substring(1, str.Length - 2);
        }
        return ret;
    }
    public static string AddHeadandTailChar(string str, char ch)
    {
        string ret = string.Empty;

        ret = ch + str + ch;

        return ret;
    }
    public static string GB2312ToUTF8(string str)
    {
        try
        {
            Encoding uft8 = Encoding.GetEncoding(65001);
            Encoding gb2312 = Encoding.GetEncoding("gb2312");
            byte[] temp = gb2312.GetBytes(str);
            byte[] temp1 = Encoding.Convert(gb2312, uft8, temp);
            string result = uft8.GetString(temp1);
            return result;
        }
        catch
        {
            return null;
        }
    }

    public static void CreateDir(string path)
    {
        if (!Directory.Exists(path))
        {
            Directory.CreateDirectory(path);
        }
    }

    public static void DeleteFile(string path)
    {
        if (File.Exists(path))
        {
            File.Delete(path);
            Debug.Log($"删除  [{path}]");
        }
    }

    //写文件
    public static void WirteToFile(string filePath, byte[] data)
    {
        if (data == null || data.Length <= 0) return;
        Debug.Log($"保存到路径【{filePath}】   【长度 = {data.Length}】");
        
        CreateDir(PathRemoveBack(filePath));
        FileStream fs = new FileStream(filePath, FileMode.Create);
        fs.Write(data, 0, data.Length);
        fs.Close();
    }


    public static void WirteStringToFile(string filePath, string data)
    {
        byte[] bytes = Encoding.UTF8.GetBytes(data);
        WirteToFile(filePath, bytes);
    }

    public static async void WriteToFileAsync(string filePath, byte[] data, Action callback = null)
    {
        CreateDir(PathRemoveBack(filePath));
        FileStream fs = new FileStream(filePath, FileMode.Create);
        await fs.WriteAsync(data, 0, data.Length);
        fs.Close();
        callback?.Invoke();
    }

    public static void WirteStringToFileAsync(string filePath, string data, Action callback = null)
    {
        byte[] bytes = Encoding.UTF8.GetBytes(data);
        WriteToFileAsync(filePath, bytes, callback);
    }

    public static string GetName(string path)
    {
        string name = null;
        string[] sts = path.Split('/');
        if (sts != null && sts.Length >= 0)
            name = sts[sts.Length - 1].Split('.')[0];
        return name;
    }


    public static string GetFullName(string path)
    {
        string name = null;
        string[] sts = path.Split('/', '\\');
        if (sts != null && sts.Length >= 0)
            name = sts[sts.Length - 1];
        return name;
    }



    public static string PathRemoveBack(string path)
    {
        int id = path.LastIndexOfAny(new char[] { '/', '\\' });

        return path.Substring(0, id);
    }

    public static string GetMD5(string path)
    {
        string md5str = string.Empty;

        using (FileStream file = new FileStream(path, FileMode.Open))
        {
            MD5 md5 = new MD5CryptoServiceProvider();

            byte[] md5bytes = md5.ComputeHash(file);

            file.Close();

            StringBuilder sb = new StringBuilder();

            for (int i = 0; i < md5bytes.Length; i++)
            {
                sb.Append(md5bytes[i].ToString("x2"));
            }

            md5str = sb.ToString();
        }

        return md5str;
    }

    public static string GetMD5(byte[] data)
    {
        string md5str = string.Empty;


        MD5 md5 = new MD5CryptoServiceProvider();

        byte[] md5bytes = md5.ComputeHash(data);


        StringBuilder sb = new StringBuilder();

        for (int i = 0; i < md5bytes.Length; i++)
        {
            sb.Append(md5bytes[i].ToString("x2"));
        }

        md5str = sb.ToString();


        return md5str;
    }

    public static string[] GetAllFileNmae(string path, string exclude, bool isfullName = false,bool isGetSubPath = true,string perName = "")
    {
        List<string> paths = new List<string>();
        string pername = string.IsNullOrEmpty(perName) ? "" : $"{perName}/";

        if (Directory.Exists(path))
        {
            DirectoryInfo dir = new DirectoryInfo(path);
            FileInfo[] fileInfos = dir.GetFiles();

            foreach (var item in fileInfos)
            {
                if (exclude != null && item.Name.EndsWith(exclude)) continue;

                if (!isfullName)
                {                
                    paths.Add(pername + item.Name);
                }
                else
                    paths.Add(item.FullName);
            }
           

            DirectoryInfo[] directoryInfos = dir.GetDirectories();
            if (isGetSubPath)
            {
                if (directoryInfos != null && directoryInfos.Length > 0)
                {
                    foreach (var item in directoryInfos)
                    {
                        string[] names = GetAllFileNmae(item.FullName, exclude, isfullName,isGetSubPath, pername + item.Name);
                        if (names != null && names.Length > 0)
                        {
                            paths.AddRange(names);
                        }
                    }
                }
            }
        }

        return paths.ToArray();
    }

    public static string[] GetAllFileNmae_Only(string path, string include, bool isfullName = false, bool isGetSubPath = true, string perName = "")
    {
        List<string> paths = new List<string>();
        string pername = string.IsNullOrEmpty(perName) ? "" : $"{perName}/";

        if (Directory.Exists(path))
        {
            DirectoryInfo dir = new DirectoryInfo(path);
            FileInfo[] fileInfos = dir.GetFiles();

            foreach (var item in fileInfos)
            {
                if (include != null && !item.Name.EndsWith(include)) continue;

                if (!isfullName)
                {
                    paths.Add(pername + item.Name);
                }
                else
                    paths.Add(item.FullName);
            }


            DirectoryInfo[] directoryInfos = dir.GetDirectories();
            if (isGetSubPath)
            {
                if (directoryInfos != null && directoryInfos.Length > 0)
                {
                    foreach (var item in directoryInfos)
                    {
                        string[] names = GetAllFileNmae_Only(item.FullName, include, isfullName, isGetSubPath, pername + item.Name);
                        if (names != null && names.Length > 0)
                        {
                            paths.AddRange(names);
                        }
                    }
                }
            }
        }

        return paths.ToArray();
    }

    public static void CopyDir(string dir, string outDir, string exclude)
    {
        string[] files1 = GetAllFileNmae(dir, exclude);
        if (dir.LastIndexOf('/') != dir.Length - 1)
        {
            dir += "/";
        }

        foreach (var item in files1)
        {
            Debug.Log("===============File : " + item);
            byte[] fdatas = File.ReadAllBytes(dir + item);

           WirteToFile($"{outDir}/{item}", fdatas);
        }

    }
    public static void CopyDir_Only(string dir, string outDir, string include)
    {
        string[] files1 = GetAllFileNmae_Only(dir, include);
        if (dir.LastIndexOf('/') != dir.Length - 1)
        {
            dir += "/";
        }

        foreach (var item in files1)
        {
            Debug.Log("===============File : " + item);
            byte[] fdatas = File.ReadAllBytes(dir + item);

            WirteToFile($"{outDir}/{item}", fdatas);
        }

    }
    public static string GetSubPath(string path, string mainPath, bool isRemoveName = true)
    {

        string subPath = string.Empty;
        List<string> str1 = path.Split('/', '\\').ToList();
        List<string> str2 = mainPath.Split('/', '\\').ToList();

        if (str1.Count - 1 <= str2.Count)
        {
            return subPath;
        }
        string[] rems = { ".", ".." };


        RemoveStrings(str2, rems);
        RemoveStrings(str1, rems);

        if (isRemoveName)
        {
            string s = str1[str1.Count - 1];
            str1.Remove(s);
        }

        string path1 = Path.Combine(str1.ToArray());

        string path2 = Path.Combine(str2.ToArray());

        int sindex = path1.IndexOf(path2);

        if (sindex != -1)
        {
            sindex = sindex + path2.Length + 1;
            int size = path1.Length - sindex;
            if (size > 0)
                subPath = path1.Substring(sindex, size);
        }

        return subPath;
    }

    public static void RemoveStrings(List<string> strs, string[] rems)
    {
        List<string> res = new List<string>();

        for (int i = 0; i < strs.Count; i++)
        {
            for (int j = 0; j < rems.Length; j++)
            {
                if (strs[i].Equals(rems[j]))
                {
                    res.Add(strs[i]);
                }
            }
        }

        for (int i = 0; i < res.Count; i++)
        {
            strs.Remove(res[i]);
        }
    }

}