我目前正在使用 Pushbullet API,需要上传文件。
我可以使用此方法成功获取文档中指定的上传 url :
public static async Task<Uploads> GetUploadUrl(string file_name, string file_type)
{
using (var client = new HttpClient())
{
client.DefaultRequestHeaders.Add("Access-Token", AccessToken);
var json = new JObject
{
["file_name"] = file_name,
["file_type"] = file_type
};
var result = await client.PostAsync(new Uri(_uploadUrl, UriKind.RelativeOrAbsolute), new HttpStringContent(json.ToString(), UnicodeEncoding.Utf8, "application/json"));
if (result.IsSuccessStatusCode)
{
var textresult = await result.Content.ReadAsStringAsync();
return JsonConvert.DeserializeObject<Uploads>(textresult);
}
}
return null;
}
问题是当我尝试上传文件时。我目前正在使用这种方法:
public static async Task<bool> UploadFile(StorageFile file, string upload_url)
{
try
{
System.Net.Http.HttpClient client = new System.Net.Http.HttpClient();
var content = new MultipartFormDataContent();
if (file != null)
{
var streamData = await file.OpenReadAsync();
var bytes = new byte[streamData.Size];
using (var dataReader = new DataReader(streamData))
{
await dataReader.LoadAsync((uint)streamData.Size);
dataReader.ReadBytes(bytes);
}
var streamContent = new ByteArrayContent(bytes);
content.Add(streamContent);
}
client.DefaultRequestHeaders.Add("Access-Token", AccessToken);
var response = await client.PostAsync(new Uri(upload_url, UriKind.Absolute), content);
if (response.IsSuccessStatusCode)
return true;
}
catch { return false; }
return false;
}
但我收到一个 Http 400 错误。在 UWP 应用程序中使用 multipart/form-data 上传文件的正确方法是什么?