WP8上传文件

Question

我试图上传一个文件通过一个网站API在我的C# Windows 8.1应用程序。我想使用Windows.Web.Http库。我可以选择一个带有FilePicker (fileChoosenFromFilePicker var)的文件。

我每次都会收到一个http 400 (坏请求)错误。

问题有人能帮我吗？如何看到由代码生成的POST请求？我可以在服务器端进行数据包捕获，但是我想在客户端看到。

码

在API文档中，有一个例子：

curl -H "Authorization: Token f2210dacd9c6ccb8133606d94ff8e61d99b477fd" -F file=@test.txt -F filename=test.txt -F parent_dir=/ http://cloud.seafile.com:8082/upload-api/ef881b22

这是我的密码：

 var HttpClientUpload = new HttpClient();
 HttpMultipartContent requestUpload = new HttpMultipartContent();
 HttpMultipartFormDataContent requestUploadContent = new HttpMultipartFormDataContent();

var fileContent = await fileChoosenFromFilePicker.OpenReadAsync();

        HttpFormUrlEncodedContent requestUploadData = new HttpFormUrlEncodedContent(new[]
                {
                    new KeyValuePair<string, string>("filename", fileChoosenFromFilePicker.Name),
                    new KeyValuePair<string, string>("parent_dir", "/")
                });

        HttpClientUpload.DefaultRequestHeaders.Add("Authorization", "token " + authorization);

         IInputStream inputStream = await fileChoosenFromFilePicker.OpenAsync(FileAccessMode.Read);
        requestUploadContent.Add(new HttpStreamContent(inputStream), "myFile", fi.Name);

           try
        {
            HttpResponseMessage response = await HttpClientUpload.PostAsync(uristringForUpload, requestUpload);
            response.EnsureSuccessStatusCode();
        }
        catch (Exception ex)
        {

        }

编辑：

我用了你的密码。并做了一些改变：

var HttpClientUpload = new HttpClient(filter);
        HttpMultipartFormDataContent requestUploadContent = new HttpMultipartFormDataContent();

        var fileContent = await fileChoosenFromFilePicker.OpenReadAsync();

        HttpClientUpload.DefaultRequestHeaders.Add("Authorization", "token " + authorization);

        FileInfo fi = new FileInfo(fileChoosenFromFilePicker.Path);
        string fileName = fi.Name;         

        var inputStream = await fileChoosenFromFilePicker.OpenAsync(FileAccessMode.Read);
        requestUploadContent.Add(new HttpStreamContent(inputStream), "myFile", fi.Name);

        var values = new[]
                {
                    new KeyValuePair<string, string>("filename", fileName),
                    new KeyValuePair<string, string>("parent_dir", "/")
                };

        foreach (var keyValuePair in values)
        {
            requestUploadContent.Add(new HttpStringContent(keyValuePair.Value), keyValuePair.Key);
        }


        try
        {
            HttpResponseMessage responseLogin = await HttpClientUpload.PostAsync(uristringForUpload, requestUploadContent);
            responseLogin.EnsureSuccessStatusCode();

        }
        catch (Exception ex)
        {

        }

现在好多了。但是它还是不起作用。

在这里您可以找到POST结果：http://requestb.in/p5jvlfp5?inspect#13hh5o

如果我用卷曲做的话，我的结果是：http://requestb.in/pwng8npw?inspect

在我的版本中，在POST结果中，没有“内容-类型:应用程序/八进制流”。我怎么才能具体说明呢？或者是因为HttpStreamContent的问题？

Answer 1

据我所知，你们没有把这些信息组合在一起。当您到达实际的PostAsync()调用时，您将发送一个类型为HttpMultipartContent的完全空包。您对变量requestUpload进行维度化，然后除了post之外，永远不会对它做任何事情。

尝试通过创建外部HttpMultipartFormDataContent对象来组合请求，您将向其中添加HttpStreamContent和HttpFormUrlEncodedContent对象，如下所示。我试图在Seafile的python上载方法文档的请求中尽可能地重新创建服务器。

var client = new HttpClient();

var request = new HttpMultipartFormDataContent();
request.Headers.Add("Authorization", "Token " + authorization);

// Add file content request part
var fileContent = await fileChosenFromFilePicker.OpenAsync(FileAccessMode.Read);
var requestContent = new HttpStreamContent(fileContent);
requestContent.Headers.Add("Content-Type", "application/octet-stream");
request.Add(requestContent, "file", fileChosenFromFilePicker.Name);

// Add form data request part
request.Add(new HttpFormUrlEncodedContent(new Dictionary<string, string>
{
    {"parent_dir", "/"}
}));

try
{
    // Submit multipart request object
    var response = await client.PostAsync(new Uri(uriStringForUpload), request);
    response.EnsureSuccessStatusCode();
}
catch (Exception ex)
{
    // TODO
}