Windows 8.1商店应用程序下载文件使用认证和头

本文关键字：文件 认证和 程序下载 应用 Windows | 更新日期: 2023-09-27 18:02:17

我正试图从服务器下载一个文件，并在我的应用程序中添加身份验证和范围标头，所以这个语法正确吗?

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(address);
                        request.Headers["Range"] = "bytes=0-";
                        request.Credentials = new NetworkCredential("username","password");

当然，代码有读取文件作为一个流和存储它的其他部分，但我关心的范围头和身份验证部分，因为它不工作。

得到一个异常

{"The 'Range' header must be modified using the appropriate property or method.'r'nParameter name: name"}

Windows 8.1商店应用程序下载文件使用认证和头

方法如下:

public async Task<byte[]> DownloadFileAsync(string requestUri)
{
    // Service URL
    string serviceURL = "http://www.example.com";
    // Http Client Handler and Credentials
    HttpClientHandler httpClientHandler = new HttpClientHandler();
    httpClientHandler.Credentials = new NetworkCredential(username, passwd, domain);
    // Initialize Client
    HttpClient client = new HttpClient(httpClientHandler)
    client.BaseAddress = new Uri(serviceURL);
    client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/bson"));
    // Add Range Header
    client.DefaultRequestHeaders.Add("Range", "bytes=0-");
    // Deserialize
    MemoryStream result = new MemoryStream();
    Stream stream = await client.GetStreamAsync(requestUri);
    await stream.CopyToAsync(result);
    result.Seek(0, SeekOrigin.Begin);
    // Bson Reader
    byte[] output = null;
    using (BsonReader reader = new BsonReader(result))
    {
        var jsonSerializer = new JsonSerializer();
        output = jsonSerializer.Deserialize<byte[]>(reader);
    }
    return output;
}

我目前使用BSON媒体格式。如果你需要关于后台BSON的额外信息，这里有一篇关于如何实现和使用它的好文章:http://www.strathweb.com/2012/07/bson-binary-json-and-how-your-web-api-can-be-even-faster/

这是另一种方法

   var httpClientHandler = new HttpClientHandler();
                        httpClientHandler.Credentials = new System.Net.NetworkCredential("username", "password");
                        var client = new HttpClient(httpClientHandler);
                        System.Net.Http.HttpRequestMessage request = new System.Net.Http.HttpRequestMessage(HttpMethod.Post, new Uri(url));
                        request.Headers.Range = new RangeHeaderValue(0, null);
                        HttpResponseMessage response = await client.SendAsync(request);
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