public ActionResult DownloadQueueWithMediaId()
{
FileDownloadQueueWithMediaIdArgs args = RequestArgs <FileDownloadQueueWithMediaIdArgs>();
if (args == null)
{
return(RespondResult(false, "参数无效。"));
}
//_fileDownloadQueue.ServerRootDir = Server.MapPath("/");
//DomainContext domainContext = _fileDomainPool.GetDomainContext(args.Domain);
FileDownloadQueueEntity item = new FileDownloadQueueEntity();
item.Domain = args.Domain;
item.AppId = args.AppId;
item.CreateTime = DateTime.Now;
item.MediaId = args.MediaId;
item.CallbackUrl = args.CallbackUrl;
item.Tag = args.Tag;
_fileDownloadQueue.Enqueue(item);
return(RespondResult());
}
public void Enqueue(FileDownloadQueueEntity item)
{
if (item == null)
{
_log.Write("FileDownloadQueueEntity == null", String.Empty, TraceEventType.Warning);
return;
}
_dataBase.Insert(item);
}
private void Download(FileDownloadQueueEntity item)
{
_log.Write("下载队列中的文件", JsonConvert.SerializeObject(item), TraceEventType.Verbose);
DomainContext domainContext = _fileDomainPool.GetDomainContext(item.Domain);
if (domainContext == null)
{
item.Status = FileDownloadQueueItemStatus.Done;
item.Success = false;
item.Message = "无效域";
item.FinishTime = DateTime.Now;
_dataBase.Update(item);
return;
}
string targetDir = Path.Combine(_serverRootDir, "FileStore", item.Domain.ToString());
if (Directory.Exists(targetDir) == false)
{
Directory.CreateDirectory(targetDir);
}
string accessToken = domainContext.AccessToken;
HttpDownloadArgs downloadArgs = new HttpDownloadArgs();
downloadArgs.Url = String.Format(
"http://file.api.weixin.qq.com/cgi-bin/media/get?access_token={0}&media_id={1}",
accessToken, item.MediaId);
downloadArgs.TargetDir = targetDir;
HttpDownloadResult downloadResult = _httpService.Download(downloadArgs);
if (downloadResult.Success == false)
{
item.Status = FileDownloadQueueItemStatus.Done;
item.Success = false;
item.Message = "下载失败：" + downloadResult.Message;
item.FinishTime = DateTime.Now;
_dataBase.Update(item);
return;
}
item.Status = FileDownloadQueueItemStatus.Done;
item.Success = downloadResult.Success;
item.Message = downloadResult.Message;
item.OutputFile = String.Format("FileStore/{0}/{1}", item.Domain, downloadResult.StoreFileName);
item.ContentType = downloadResult.ContentType;
item.FileLength = (int)(downloadResult.FileLength / 1024);
FileDownloadQueueWithMediaIdResult result = new FileDownloadQueueWithMediaIdResult();
result.Success = item.Success;
result.Message = item.Message;
result.OutputFile = item.OutputFile;
result.ContentType = item.ContentType;
result.Tag = item.Tag;
result.MediaId = item.MediaId;
result.FileLength = item.FileLength;
_log.Write("下载队列中的文件返回（WithMediaId）", JsonConvert.SerializeObject(result), TraceEventType.Verbose);
//把下载结果POST到回调地址上
HttpRequestArgs requestArgs = new HttpRequestArgs();
requestArgs.Method = "POST";
requestArgs.Url = item.CallbackUrl;
requestArgs.Content = JsonConvert.SerializeObject(result);
HttpRequestResult requestResult = _httpService.Request(requestArgs);
if (requestResult.Success)
{
ApiResult callbackApiResult = JsonConvert.DeserializeObject <ApiResult>(requestResult.Content);
if (callbackApiResult.Success == false)
{
item.Status = FileDownloadQueueItemStatus.Done;
item.Success = false;
item.Message = "回调失败：" + callbackApiResult.Message;
item.FinishTime = DateTime.Now;
}
}
else
{
item.Status = FileDownloadQueueItemStatus.Done;
item.Success = false;
item.Message = "回调失败：" + requestResult.Exception.Message;
item.FinishTime = DateTime.Now;
}
_dataBase.Update(item);
}
