Unity资源文件创建对应的MD5

写了一个简单的例子,传入指定文件夹,会给该文件夹下的文件生成对应的MD5,然后将信息转换成Json存储到本地;

注意,文件夹下如果有子文件夹(及多层目录),没有做处理;

using System.Collections;
using System.Collections.Generic;
using System.Security.Cryptography;
using UnityEngine;
using UnityEngine.Networking;
using System.IO;
using UnityEngine.UI;
using System.Text;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;//数据结构
[System.Serializable]
public struct Md5Info
{public string name;public string md5;public Md5Info(string n,string m){name = n;md5 = m;}
}[System.Serializable]
public class MD5InfoData
{public List<Md5Info> md5Info = new List<Md5Info>();public static void SaveData(string path, MD5InfoData data){IFormatter formatter = new BinaryFormatter();Stream stream = new FileStream(path, FileMode.Create, FileAccess.Write, FileShare.None);formatter.Serialize(stream, data);stream.Close();string cfgJson = JsonUtility.ToJson(data, true);File.WriteAllText(path, cfgJson);}public static MD5InfoData GetMD5Data(string path){string text = File.ReadAllText(path);MD5InfoData info = JsonUtility.FromJson<MD5InfoData>(text);return info;}
}public class MD5Test : MonoBehaviour
{public void CreateResFileMd5(string path){MD5InfoData fmd5 = new MD5InfoData();DirectoryInfo root = new DirectoryInfo(path);FileInfo[] files = root.GetFiles("*", SearchOption.AllDirectories);foreach (var f in files){//排除.meta文件if (f.Name.EndsWith(".meta")){continue;}//Debug.Log(f.DirectoryName);string md5 = GetMd5HashFromFile(f.DirectoryName + "/" + f.Name);//Debug.Log(f.Name + "的Md5 = " + md5);Md5Info info = new Md5Info(f.Name, md5);fmd5.md5Info.Add(info);}//存储Json到本地MD5InfoData.SaveData(Application.streamingAssetsPath + "/md5.json", fmd5);}string GetMd5HashFromFile(string filePath){FileStream fs = new FileStream(filePath, FileMode.Open);MD5 md5 = new MD5CryptoServiceProvider();byte[] hash = md5.ComputeHash(fs);fs.Close();StringBuilder sb = new StringBuilder();for (int i = 0; i < hash.Length; i++){sb.Append(hash[i].ToString("x2"));}return sb.ToString().ToUpper();}
}

最后的json文件长这样:==>

新增简单下载测试:

using System.Collections;
using System.Collections.Generic;
using System.Security.Cryptography;
using UnityEngine;
using UnityEngine.Networking;
using System.IO;
using UnityEngine.UI;
using System.Text;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;public class DownloadTest : MonoBehaviour
{public Text txt_process;string[] downloadURL = { "http://www.test_1.com:81/IISTest/res/1.txt", "http://www.test_1.com:81/IISTest/res/1.jpg" };List<string> updateFileName = new List<string>();// Start is called before the first frame updatevoid Start(){txt_process.text = "下载";}public void BtnEvent_Download(){StartCoroutine(ReqRes());}public void BtnEvent_CheckMD5(){//获取服务端MD5的json数据StartCoroutine(CheckMD5());}public void CreateResFileMd5(string path)//Application.dataPath + "/TestRes";{MD5InfoData fmd5 = new MD5InfoData();DirectoryInfo root = new DirectoryInfo(path);FileInfo[] files = root.GetFiles("*", SearchOption.AllDirectories);foreach (var f in files){//排除.meta文件if (f.Name.EndsWith(".meta")){continue;}//Debug.Log(f.DirectoryName);string md5 = GetMd5HashFromFile(f.DirectoryName + "/" + f.Name);//Debug.Log(f.Name + "的Md5 = " + md5);Md5Info info = new Md5Info(f.Name, md5);fmd5.md5Info.Add(info);}//存储Json到本地MD5InfoData.SaveData(Application.streamingAssetsPath + "/md5.json", fmd5);}IEnumerator CheckMD5(){string url = "http://www.test_1.com:81/IISTest/res/md5.json";var req = UnityWebRequest.Get(url);yield return req.SendWebRequest();var text = req.downloadHandler.text;MD5InfoData info = JsonUtility.FromJson<MD5InfoData>(text);var serverList = info.md5Info;//与本地MD5数据做对比,找到变化的文件,取文件名string localPath = Application.streamingAssetsPath + "/md5.json";MD5InfoData localMD5Data = MD5InfoData.GetMD5Data(localPath);var localList = localMD5Data.md5Info;List<string> changeNames = new List<string>();//对比,有变化的或新增的,都将name字段的value放入changeNamesforeach (var data in serverList){bool newFile = true;foreach (var item in localList){if (string.Equals(data.name, item.name)){newFile = false;if (!string.Equals(data.md5, item.md5)){changeNames.Add(data.name);}}}//新增文件if (newFile){changeNames.Add(data.name);}}updateFileName = changeNames;}IEnumerator ReqRes(){FileStream file = null;foreach (var url in downloadURL){var req = UnityWebRequest.Get(url);yield return req.SendWebRequest();if (req.isHttpError || req.isNetworkError){Debug.Log("error");}else{while (!req.isDone){txt_process.text = "下载中..." + req.downloadProgress + "%";}var data = req.downloadHandler.data;string fileName = Path.GetFileName(url);file = new FileStream(Application.streamingAssetsPath + "/" + fileName, FileMode.Create);file.Write(data, 0, data.Length);file.Close();}}txt_process.text = "下载完成";yield return new WaitForSeconds(1);//UnityEditor.AssetDatabase.Refresh();}string GetMd5HashFromFile(string filePath){FileStream fs = new FileStream(filePath, FileMode.Open);MD5 md5 = new MD5CryptoServiceProvider();byte[] hash = md5.ComputeHash(fs);fs.Close();StringBuilder sb = new StringBuilder();for (int i = 0; i < hash.Length; i++){sb.Append(hash[i].ToString("x2"));}return sb.ToString().ToUpper();}}//数据结构
[System.Serializable]
public struct Md5Info
{public string name;public string md5;public Md5Info(string n,string m){name = n;md5 = m;}
}[System.Serializable]
public class MD5InfoData
{public List<Md5Info> md5Info = new List<Md5Info>();public static void SaveData(string path, MD5InfoData data){IFormatter formatter = new BinaryFormatter();Stream stream = new FileStream(path, FileMode.Create, FileAccess.Write, FileShare.None);formatter.Serialize(stream, data);stream.Close();string cfgJson = JsonUtility.ToJson(data, true);File.WriteAllText(path, cfgJson);}public static MD5InfoData GetMD5Data(string path){string text = File.ReadAllText(path);MD5InfoData info = JsonUtility.FromJson<MD5InfoData>(text);return info;}
}

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