private IEnumerator GetUpdateFileAndSave(AssetDownloadData asset)
{
DownloadHandlerFile downloadHandler = new DownloadHandlerFile(Path.Combine(EnvironmentVariables.ExportAssetsRoot, asset.localPath));
using (UnityWebRequest uwr1 = UnityWebRequest.Get(asset.uri1))
{
uwr1.certificateHandler = new UpdateCertificateHandler();
uwr1.downloadHandler = downloadHandler;
uwr1.SendWebRequest();
while (!uwr1.isDone)
{
asset.progress = uwr1.downloadProgress;
yield return(new WaitForEndOfFrame());
}
if (uwr1.isNetworkError)
{
ErrorList.Add(asset);
yield break;
}
else if (uwr1.isHttpError)
{
using (UnityWebRequest uwr2 = UnityWebRequest.Get(asset.uri2))
{
uwr2.certificateHandler = new UpdateCertificateHandler();
uwr2.downloadHandler = downloadHandler;
uwr2.SendWebRequest();
while (!uwr2.isDone)
{
asset.progress = uwr2.downloadProgress;
yield return(new WaitForEndOfFrame());
}
if (uwr2.isNetworkError || uwr2.isHttpError)
{
ErrorList.Add(asset);
yield break;
}
}
}
else
{
asset.isSuccess = true;
}
}
}
private void AddToDownloadList(IEnumerable <string> assetKeys)
{
foreach (var item in assetKeys)
{
// update catalog 中的MD5值
string assetRemoteMD5 = (string)UpdateSharedData.Instance.RemoteCatalog["assets"][item]["md5"];
// current catalog 中的MD5值
string assetLocalMD5 = UpdateSharedData.Instance.LocalCatalog["assets"].Keys.Contains(item) ? (string)UpdateSharedData.Instance.LocalCatalog["assets"][item]["md5"] : null;
// 添加进更新数组中的文件，1个条件：
// 1.本地文件的MD5值与update catalog列表中不同。因为MD5相同的话，可能的情况是该文件已经下载但是整个更新流程并未完成。因此不用重复下载
// 取消ver比较的原因在于，可能出现某个在中间某个版本删除，然后原文件又被加回来的情况。这样就会导致ver号升高但是MD5不变，等同于下载完成但是更新未完成，因此ver号失去校验意义
string fileAbsPath = Path.Combine(EnvironmentVariables.ExportAssetsRoot, item);
if (assetRemoteMD5.Equals(assetLocalMD5)) // 不需要更新
{
continue;
}
else if ((File.Exists(fileAbsPath) && // 文件存在
UpdateUtils.MD5Hash(File.OpenRead(fileAbsPath)).Equals(assetRemoteMD5))) //已下载完成
{
Debug.Log("the asset has been downloaded@" + fileAbsPath);
continue;
}
else
{
AssetDownloadData data = new AssetDownloadData();
data.localPath = item;
Uri result;
if (Uri.TryCreate(new Uri((string)UpdateSharedData.Instance.RemoteVersion["cdn1"]), item, out result))
{
data.uri1 = result.ToString();
}
if (Uri.TryCreate(new Uri((string)UpdateSharedData.Instance.RemoteVersion["cdn2"]), item, out result))
{
data.uri2 = result.ToString();
}
data.size = ((int)UpdateSharedData.Instance.RemoteCatalog["assets"][item]["size"]);
RequiredDownloadSize += ((int)UpdateSharedData.Instance.RemoteCatalog["assets"][item]["size"]);
UpdateSharedData.Instance.DownloadList.Add(data);
}
}
}
