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我正在尝试从本地网络设备下载几个文件: http 文件目录

我想编写一个代码,将所有这些 .avi 文件自动下载到我的电脑驱动器。

我有两个问题:

问题 1:仅使用 WebClient 类进行身份验证。如果我只使用 WebClient 类进行连接,则会收到 401 Unauthorized 错误。

代码:

try
{
    using (WebClient myWebClient = new WebClient())
    { 
                    myWebClient.UseDefaultCredentials = false;
                    myWebClient.Credentials = new NetworkCredential("user", "pword");
                    String userName = "user";
                    String passWord = "pword";
                    string credentials = Convert.ToBase64String(Encoding.ASCII.GetBytes(userName + ":" + passWord));
                    myWebClient.Headers[HttpRequestHeader.Authorization] = "Basic " + credentials;
                    Console.WriteLine("Header AUTHORIZATION: "+ myWebClient.Headers[HttpRequestHeader.Authorization].ToString());

                // Download the Web resource and save it into the current filesystem folder.
                Console.WriteLine("Start DL");
                myWebClient.DownloadFile("http://192.168.2.72:81/sd/20170121/record000/P170121_000000_001006.avi", "P170121_000000_001006.avi");
                Console.WriteLine("End DL");
      }
}
catch(Exception ex)
{
                Console.WriteLine("DOWNLOAD ERROR: " + ex.ToString());
 }

错误消息:无法验证 401 未经授权的错误

问题 2:能够使用 WebProxy 类进行身份验证,但无法下载。出现 403 Not found 错误。

代码:

try
{
    using (WebClient myWebClient = new WebClient())
    {
            WebProxy wp = new WebProxy("http://192.168.2.72:81/sd/20170121/record000/",false);                   
            wp.Credentials = new NetworkCredential("user","pword");
            Console.WriteLine("Web Proxy: " + wp.Address);
            myWebClient.UseDefaultCredentials = false;
            myWebClient.Credentials = wp.Credentials;
            myWebClient.Proxy = wp;
            Console.WriteLine("Downloading File \"{0}\" from \"{1}\"\n\n", filename, wp.Address);

            // Download the Web resource and save it into the current filesystem folder.
            Console.WriteLine("Start DL");
            myWebClient.DownloadFile("http://192.168.2.72:81/sd/20170121/record000/P170121_000000_001006.avi", "P170121_000000_001006.avi");
            Console.WriteLine("End DL");
        }
     }
     catch(Exception ex)
     {
         Console.WriteLine("DOWNLOAD ERROR: " + ex.ToString());
     }

错误消息:403 未找到

下载错误:System.Net.WebException:远程服务器返回错误:(404)未找到。在 System.Net.WebClient.DownloadFile(Uri address, String fileName) 在 System.Net.WebClient.DownloadFile(String address, String fileName) 在 ConsoleApplication2.Program.Main(String[] args) 在 C:\Users\Gordon\文档\visual studio 2015\Projects\ConsoleApplication2\ConsoleApplication2\Program.cs:line 139

请帮助我确定我的代码中是否有任何错误,或者是否有更好的方法来提交凭据并下载所有文件。

提前致谢!

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1 回答 1

0

我不是 Dot Net 开发人员,我只是分享我的观点。在第二点中,您提到您收到 403,这是访问被拒绝的 Http 状态代码。我觉得您的凭据无效,或者您无权执行此操作。

于 2017-01-22T15:31:14.720 回答