Question

我使用远程云服务器来存储我的图像。如果我使用控制台执行这些代码，它运行良好，但在asp.net mvc中它总是挂在＆＃34; WaitOne（） ＆＃34;

    public class UploadUtil
{

    public static string  UploadBase64(string bucket,string filelocation)
    {
        //qiniu.Config.ACCESS_KEY = System.Configuration.ConfigurationManager.AppSettings["ACCESS_KEY"];
        //qiniu.Config.SECRET_KEY = System.Configuration.ConfigurationManager.AppSettings["SECRET_KEY"];
        qiniu.Config.InitFromAppConfig();

        string qiniuKey = Guid.NewGuid().ToString();
        string returnUrl = string.Empty;

        ManualResetEvent done = new ManualResetEvent(false);
        jpegToBase64 jpeg = new jpegToBase64(filelocation);
        QiniuFile qfile = new QiniuFile(bucket, qiniuKey);
        qfile.UploadCompleted += (sender, e) => {
            returnUrl = e.RawString;
            Console.Write(e.RawString);
            done.Set();

        };
        qfile.UploadFailed += (sender, e) => {
            QiniuWebException qe = (QiniuWebException)e.Error;
            Console.WriteLine(qe.Error.ToString());
        };
        qfile.UploadString((int)jpeg.Filesize, "image/png", jpeg.Base64Content);
        done.WaitOne();
        return returnUrl;

    }

}

actionresult看起来像这样，如果我使用正常的ActionResult，就会发生错误，所以我必须使用Task

    public Task<ActionResult> TestUpload()
    {
        var s = UploadUtil.UploadBase64("kmsfan", @"D:\\b.jpg");
        return null;

    }

Answer 1

如果上传失败，您的ManualResetEvent将永远不会发出信号。您应该避免在服务器环境中阻止同步代码。

使用TaskCompletionSource表示您的异步上传任务：

public class UploadUtil
{

    public static Task<string> UploadBase64Async(string bucket,string filelocation)
    {
       var tcs = new TaskCompletionSource<string>();
       qiniu.Config.InitFromAppConfig();

        string qiniuKey = Guid.NewGuid().ToString();

        jpegToBase64 jpeg = new jpegToBase64(filelocation);
        QiniuFile qfile = new QiniuFile(bucket, qiniuKey);
        qfile.UploadCompleted += (sender, e) => {
            var returnUrl = e.RawString;
            Console.Write(returnUrl);
            tcs.SetResult(returnUrl);    
        };
        qfile.UploadFailed += (sender, e) => {
            QiniuWebException qe = (QiniuWebException)e.Error;
            Console.WriteLine(qe.Error.ToString());
            tcs.SetException(qe);  
        };
        qfile.UploadString((int)jpeg.Filesize, "image/png", jpeg.Base64Content);
        return tcs.Task;    
    }

}

控制器：

public async Task<string> TestUpload()
{
    var s = await UploadUtil.UploadBase64Async("kmsfan", @"D:\\b.jpg");
    return s;
}

ManualResetEvent.WaitOne始终挂在ASP.NET MVC中

1 个答案: