IEnumerator DownloadFileSizeHandler()
{
HeadHandler handler = new HeadHandler();
UnityWebRequest request = UnityWebRequest.Head(mDownloadObj.url);
request.downloadHandler = handler;
request.timeout = UnityDownloadManager.TIMEOUT;
request.chunkedTransfer = true;
request.disposeDownloadHandlerOnDispose = true;
yield return(request.SendWebRequest());
//Dictionary<string, string> dic = request.GetResponseHeaders();
//foreach (var item in dic) Debug.Log(item.Key + " " + item.Value);
//item.Key:Content-Type item.Value:video/mp4
//item.Key:Content-Disposition item.Value:inline; filename = "o_1d6hoeipu1bem1rdjvqtush1gu8l.mp4"; filename *= utf - 8' 'o_1d6hoeipu1bem1rdjvqtush1gu8l.mp4
//设置文件名的后缀
string content_Type = request.GetResponseHeader("Content-Type");
string[] arr = content_Type.Split('/');
string houzhui = string.Format(".{0}", arr[arr.Length - 1]);
if (!mDownloadObj.fileName.Contains("."))
{
mDownloadObj.fileName += houzhui;
Debug.Log("添加后缀：" + mDownloadObj.fileName);
}
if (mDownloadObj.OnGetFileSizeAction != null)
{
mDownloadObj.SetContentLength(handler.ContentLength);
mDownloadObj.OnGetFileSizeAction((int)request.responseCode, mDownloadObj);//request.responseCode == 200 代表获取文件大小成功
}
request.Abort();
request.Dispose();
}
/// <summary>
/// 文件数据长度
/// </summary>
protected override void ReceiveContentLength(int contentLength)
{
mDownloadObj.SetContentLength(mDownloadObj.sDownloadFileResult.downloadedLength + contentLength);
}