public FileDownloadAgentWithMediaIdResult DownloadAgentWithMediaId(FileDownloadAgentWithMediaIdArgs args)
{
FileDownloadAgentWithMediaIdResult result;
HttpRequestArgs requestArgs = new HttpRequestArgs();
requestArgs.Method = "POST";
requestArgs.Url = _fileServiceUri + "File/DownloadAgentWithMediaId";
requestArgs.Content = JsonConvert.SerializeObject(args);
_log.Write("发起文件代理下载请求（DownloadAgentWithMediaId）", requestArgs.Content, TraceEventType.Verbose);
HttpRequestResult requestResult = _httpService.Request(requestArgs);
if (requestResult.Success)
{
_log.Write("文件代理下载请求返回（DownloadAgentWithMediaId）", requestResult.Content, TraceEventType.Verbose);
result = JsonConvert.DeserializeObject <FileDownloadAgentWithMediaIdResult>(requestResult.Content);
}
else
{
result = new FileDownloadAgentWithMediaIdResult();
result.Message = requestResult.Exception.Message;
}
return(result);
}
internal FileDownloadAgentWithMediaIdResult DownloadWithMediaId(DomainContext domainContext, FileDownloadAgentWithMediaIdArgs args)
{
//下载多媒体文件
//http://mp.weixin.qq.com/wiki/12/58bfcfabbd501c7cd77c19bd9cfa8354.html
if (args.Sync)
{
return(DownloadFileWithMediaId(domainContext, args));
}
else
{
object[] stateArray = new object[2];
stateArray[0] = domainContext;
stateArray[1] = args;
Task <FileDownloadAgentWithMediaIdResult> downloadTask = new Task <FileDownloadAgentWithMediaIdResult>(DownloadFileWithMediaIdTask, stateArray);
downloadTask.ContinueWith((task) =>
{
FileDownloadAgentWithMediaIdResult downloadResult;
if (task.IsFaulted)
{
downloadResult = new FileDownloadAgentWithMediaIdResult();
if (task.Exception.InnerException != null)
{
downloadResult.Message = task.Exception.InnerException.Message;
_log.Write("异步下载失败", task.Exception.InnerException.Message + "\r\n" +
task.Exception.InnerException.StackTrace, TraceEventType.Error);
}
else
{
downloadResult.Message = task.Exception.Message;
_log.Write("异步下载失败", task.Exception.Message + "\r\n" +
task.Exception.StackTrace, TraceEventType.Error);
}
}
else
{
downloadResult = task.Result;
}
//把下载结果POST到回调地址上
HttpRequestArgs requestArgs = new HttpRequestArgs();
requestArgs.Method = "POST";
requestArgs.Url = args.CallbackUrl;
requestArgs.Content = JsonConvert.SerializeObject(downloadResult);
_httpService.Request(requestArgs);
});
downloadTask.Start();
FileDownloadAgentWithMediaIdResult result = new FileDownloadAgentWithMediaIdResult();
result.Message = "这是一个异步下载任务。";
return(result);
}
}
private FileDownloadAgentWithMediaIdResult DownloadFileWithMediaIdTask(object state)
{
object[] stateArray = (object[])state;
DomainContext domainContext = (DomainContext)stateArray[0];
FileDownloadAgentWithMediaIdArgs args = (FileDownloadAgentWithMediaIdArgs)stateArray[1];
FileDownloadAgentWithMediaIdResult result = DownloadFileWithMediaId(domainContext, args);
return(result);
}
/// <summary>
/// 提交投票项目
/// </summary>
/// <returns></returns>
public ActionResult CreatePictureVoteItem()
{
CreatePictureVoteItemArgs args = RequestArgs <CreatePictureVoteItemArgs>();
if (args == null)
{
return(RespondResult(false, "参数无效。"));
}
if (String.IsNullOrEmpty(args.ImageServerId))
{
return(RespondResult(false, "参数无效。"));
}
//判断参与人数是否达到限制
if (_campaignManager.PictureVote.PictureVoteIsFullParticipant(args.CampaignId))
{
return(RespondResult(false, "该活动已达最大允许参与人数。"));
}
//调用文件服务器进行代理下载，把上传到微信后台的文件下载下来
FileDownloadAgentWithMediaIdArgs downloadArgs = new FileDownloadAgentWithMediaIdArgs();
downloadArgs.Domain = DomainContext.Domain.Id;
downloadArgs.MediaId = args.ImageServerId;
FileDownloadAgentWithMediaIdResult downloadResult = _fileService.DownloadAgentWithMediaId(downloadArgs);
string imageUrl;
if (downloadResult.Success)
{
_log.Write("下载媒体文件返回：", JsonConvert.SerializeObject(downloadResult), TraceEventType.Verbose);
imageUrl = _fileService.FileServiceUri + downloadResult.OutputFile;
}
else
{
return(RespondResult(false, "照片上传失败：" + downloadResult.Message));
}
Campaign_PictureVoteItemEntity item = new Campaign_PictureVoteItemEntity();
item.Domain = DomainContext.Domain.Id;
item.CampaignId = args.CampaignId;
item.Member = MemberContext.Member.Id;
item.Title = args.Title;
item.Description = args.Description;
item.Url = imageUrl;
item.UploadTime = DateTime.Now;
EnumCampaignCreatePictureVoteItemResult result = _campaignManager.PictureVote.CreatePictureVoteItem(item);
return(RespondDataResult(result));
}
/// <summary>
/// 下载代理
/// 将指定MediaId的文件下载到地文件服务器
/// </summary>
/// <returns></returns>
public ActionResult DownloadAgentWithMediaId()
{
FileDownloadAgentWithMediaIdArgs args = RequestArgs <FileDownloadAgentWithMediaIdArgs>();
if (args == null)
{
return(RespondResult(false, "参数无效。"));
}
args.ServerRootDir = Server.MapPath("/");
DomainContext domainContext = _fileDomainPool.GetDomainContext(args.Domain);
FileDownloadAgentWithMediaIdResult result = _fileManager.DownloadWithMediaId(domainContext, args);
return(new ContentResult()
{
Content = JsonConvert.SerializeObject(result)
});
}
private FileDownloadAgentWithMediaIdResult DownloadFileWithMediaId(DomainContext domainContext, FileDownloadAgentWithMediaIdArgs args)
{
_log.Write("发起文件代理下载请求（WithMediaId）", JsonConvert.SerializeObject(args), TraceEventType.Verbose);
string targetDir = Path.Combine(args.ServerRootDir, "FileStore", args.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, args.MediaId);
downloadArgs.TargetDir = targetDir;
HttpDownloadResult downloadResult = _httpService.Download(downloadArgs);
FileDownloadAgentWithMediaIdResult result = new FileDownloadAgentWithMediaIdResult();
result.Success = downloadResult.Success;
result.Message = downloadResult.Message;
result.OutputFile = String.Format("FileStore/{0}/{1}", args.Domain, downloadResult.StoreFileName);
result.ContentType = downloadResult.ContentType;
result.Tag = args.Tag;
result.MediaId = args.MediaId;
_log.Write("文件代理下载请求返回（WithMediaId）", JsonConvert.SerializeObject(result), TraceEventType.Verbose);
return(result);
}
