private IEnumerator UpdateFiles()
{
#if !UNITY_ANDROID
string updateWwwPath = "file://" + Application.persistentDataPath;
string localWwwPath = "file://" + Application.streamingAssetsPath;
#else
string updateWwwPath = Application.persistentDataPath;
string localWwwPath = Application.streamingAssetsPath;
#endif
string serverMD5;
// 获取http服务器上的版本MD5
using (WWW www = new WWW(GenRandomURL("versionMD5")))
{
yield return(www);
if (www == null || !string.IsNullOrEmpty(www.error))
{
LogManager.Error("VersionManager::UpdateFiles => can't get versionMD5 form server");
yield break;
}
serverMD5 = www.text;
}
// 检验客户端安装包自带的版本MD5是否最新
// 是则删除本地更新文件，并结束更新
// 否则继续往下执行
VersionInfo versionInfo = null;
using (WWW www = new WWW(Path.Combine(localWwwPath, "version")))
{
yield return(www);
if (www == null || !string.IsNullOrEmpty(www.error))
{
LogManager.Error("VersionManager::UpdateFiles => can't get version file form client");
yield break;
}
if (CheckBytesMD5(www.bytes, serverMD5))
{
_updated = true;
yield return(StartCoroutine(ClearUpdatedFiles(updateWwwPath)));
yield break;
}
versionInfo = JsonUtility.FromJson <VersionInfo>(www.text);
}
// 检验更新目录下的版本MD5是否最新
// 是则结束更新
// 否则继续往下执行
VersionInfo oldInfo = null;
if (File.Exists(Path.Combine(Application.persistentDataPath, "version")))
{
using (WWW www = new WWW(Path.Combine(updateWwwPath, "version")))
{
yield return(www);
if (www == null || !string.IsNullOrEmpty(www.error))
{
LogManager.Error("VersionManager::UpdateFiles => can't get version file form update path");
yield break;
}
if (CheckBytesMD5(www.bytes, serverMD5))
{
_updated = true;
yield break;
}
oldInfo = JsonUtility.FromJson <VersionInfo>(www.text);
}
}
// 从服务器获取最新的版本文件
VersionInfo newInfo = null;
byte[] newInfoBytes = null;
using (WWW www = new WWW(GenRandomURL("version")))
{
yield return(www);
if (www == null || !string.IsNullOrEmpty(www.error) || !CheckBytesMD5(www.bytes, serverMD5))
{
LogManager.Error("VersionManager::UpdateFiles => can't get version file form server");
yield break;
}
newInfoBytes = www.bytes;
newInfo = JsonUtility.FromJson <VersionInfo>(www.text);
if (newInfo == null)
{
LogManager.Error("VersionManager::UpdateFiles => can't parse version file from server");
yield break;
}
}
// 若本地存在更新内容，则删除其中非最新的内容
if (oldInfo != null)
{
for (int i = oldInfo._folders.Count - 1; i >= 0; --i)
{
FolderInfo oldFolderInfo = oldInfo._folders[i];
string folder = oldFolderInfo._name;
string folderPath = Path.Combine(Application.persistentDataPath, folder);
FolderInfo newFolderInfo = newInfo._folders.Find(obj => obj._name == folder);
if (newFolderInfo == null)
{
if (Directory.Exists(folder))
{
Directory.Delete(folder);
}
continue;
}
for (int j = oldFolderInfo._files.Count; j >= 0; --j)
{
FileInfo oldFileInfo = oldFolderInfo._files[j];
FileInfo newFileInfo = newFolderInfo._files.Find(obj => obj._name == oldFileInfo._name);
if (newFileInfo == null || newFileInfo._md5 != oldFileInfo._md5)
{
string filePath = Path.Combine(folderPath, oldFileInfo._name);
if (File.Exists(filePath))
{
File.Delete(filePath);
}
}
}
}
}
// 计算安装包版与最新版之间的差异
for (int i = 0; i < newInfo._folders.Count; ++i)
{
FolderInfo newFolder = newInfo._folders[i];
FolderInfo oldFolder = versionInfo._folders.Find(obj => obj._name == newFolder._name);
if (oldFolder == null)
{
_diffFolders.Add(newFolder);
continue;
}
FolderInfo diffFolder = new FolderInfo();
for (int j = 0; j < newFolder._files.Count; ++j)
{
FileInfo newFile = newFolder._files[j];
FileInfo oldFile = oldFolder._files.Find(obj => obj._name == newFile._name);
if (oldFile == null || oldFile._md5 != newFile._md5)
{
diffFolder._files.Add(newFile);
}
}
if (diffFolder._files.Count > 0)
{
diffFolder._name = newFolder._name;
_diffFolders.Add(diffFolder);
}
}
// 下载差异内容
for (int i = 0; i < _diffFolders.Count; ++i)
{
FolderInfo folderInfo = _diffFolders[i];
string folderPath = Path.Combine(Application.persistentDataPath, folderInfo._name);
if (!Directory.Exists(folderPath))
{
Directory.CreateDirectory(folderPath);
}
for (int j = 0; j < folderInfo._files.Count; ++j)
{
FileInfo fileInfo = folderInfo._files[j];
string filePath = Path.Combine(folderPath, fileInfo._name);
if (File.Exists(filePath))
{
continue;
}
using (WWW www = new WWW(GenRandomURL("")))
{
yield return(www);
if (www == null || !string.IsNullOrEmpty(www.error) || !CheckBytesMD5(www.bytes, fileInfo._md5))
{
LogManager.Error(string.Format("VersionManager::UpdateFiles => can't download [{0}/{1}] from server", folderInfo._name, fileInfo._name));
yield break;
}
File.WriteAllBytes(filePath, www.bytes);
}
}
}
// 覆盖版本文件
File.WriteAllBytes(Path.Combine(Application.persistentDataPath, "version"), newInfoBytes);
}