如何使用Windows Phone 8.1中的BackgroundUploader将照片上传到500px？

Question

我已经获得了使用OAuth上传的以下代码。

public async Task UploadPhotoContinueAsync(IEnumerable<StorageFile> files)
{
    var uri = string.Format("https://api.500px.com/v1/photos/upload?name={0}&description={1}&privacy=0&category=0", "test name", "test description");
    var backgroudUploader = new BackgroundUploader();
    var headers = OAuthUtility.BuildBasicParameters(consumerKey, consumerSecret, uri, HttpMethod.Post, GetAccessToken());
    var header = string.Empty;
    var file = files.First();
    foreach (var item in headers)
    {
        header += string.Format(@"{0}=""{1}"",", item.Key, item.Value);
    }

    header = header.Remove(header.Length - 1);

    backgroudUploader.SetRequestHeader("Authorization", string.Format("OAuth {0}", header));
    backgroudUploader.SetRequestHeader("Filename", file.Name);

    var op = backgroudUploader.CreateUpload(new Uri(uri), file);
    try
    {
            var result = await op.StartAsync();
    }
    catch (Exception ex)
    {
        Debug.WriteLine(ex.Message);
    }
}

问题是每次我开始操作时都会从API中获得内部服务器错误。

我似乎无法弄清问题是什么。

有人想出来了吗？感谢。

编辑：

我终于让Fiddler工作了。以下是应用发送给API的标头：

Answer 1

我注意到Fiddler版本中没有内容类型。看起来像500px需要多部分内容类型，并且从twitter发布的控制台屏幕显示正在设置。

您是否尝试使用BackgroundUploader.SetRequestHeader强制内容类型？

backgroundUploader.SetRequestHeader（＆＃34; Content-Type＆＃34;，＆＃34; multipart / form-data; boundary =＆＃34; + boundray）; backgroundUploader.Method =＆＃34; POST＆＃34 ;;

如果失败，可以使用BackgroundTransferContentPart？ http://msdn.microsoft.com/en-us/library/windows/apps/windows.networking.backgroundtransfer.backgroundtransfercontentpart.aspx

这里有一些想法： https://social.msdn.microsoft.com/Forums/windowsapps/en-US/9b2a31c0-30e3-499b-a265-10e8d97a79ad/upload-video-file-to-server-with-backgrounduploader?forum=winappswithcsharp

Answer 2

我知道它不是很专业，但我终于找到了修改代码的方法：）

这里有更新的功能：

public async Task UploadPhotoContinueAsync(IEnumerable<StorageFile> files)
{
    var uri = string.Format("https://api.500px.com/v1/photos/upload?name={0}&description={1}&privacy=0&category=0", "test name", "test description");
    var backgroudUploader = new BackgroundUploader();
    var headers = OAuthUtility.BuildBasicParameters(consumerKey, consumerSecret, uri, HttpMethod.Post, GetAccessToken());
    var header = string.Empty;
    var file = files.First();
    foreach (var item in headers)
    {
        header += string.Format(@"{0}=""{1}"", ", item.Key, item.Value);
    }

    header = header.Remove(header.Length - 2);

    backgroudUploader.SetRequestHeader("Authorization", string.Format("OAuth {0}", header));
    backgroudUploader.SetRequestHeader("Filename", file.Name);
    string boundary = "----------------------------" + DateTime.Now.Ticks.ToString("x");
    backgroudUploader.SetRequestHeader("Content-Type", "multipart/form-data; boundary=" + boundary);
    backgroudUploader.Method = "POST";

    var parts = new List<BackgroundTransferContentPart>();
    var part = new BackgroundTransferContentPart();
    part.SetHeader("Content-Disposition", @"form-data; name=""file""; filename=""" + file.Name + "\"");
    part.SetFile(file);
    parts.Add(part);

    var op = await backgroudUploader.CreateUploadAsync(new Uri(uri), parts, "", boundary);
    try
    {
        var result = await op.StartAsync();
    }
    catch (Exception ex)
    {
        Debug.WriteLine(ex.Message);
    }
}

感谢所有帮助过的人！