c#下载文件乱码问题？

nanfei01055 2013-11-20 07:44:41

我写了个BHO拦截并下载文件
我使用HttpWebRequest下载百度网盘里的文件，可以获取到Content-Disposition, 然后获取文件名，有以下三种情况：

1.全英文没问题。

2.全中文有时没问题，大多数情况文件名乱码。

3.文件名中英文混合的一定会有问题，获取到的文件名中文部分是乱码.

代码如下，代码里本来有302跳转跟踪的，但贴出来代码就不完整了，就没贴出来：

var url = state.ToString();

                HttpWebRequest request = null;

                if (url.ToLower().StartsWith("https", StringComparison.OrdinalIgnoreCase))

                {

                    ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(CheckValidationResult);

                    request = WebRequest.Create(url) as HttpWebRequest;

                    request.ProtocolVersion = HttpVersion.Version10;

                }

                else

                {

                    request = WebRequest.Create(url) as HttpWebRequest;

                }



                request.AllowWriteStreamBuffering = true;

                request.Credentials = System.Net.CredentialCache.DefaultCredentials;

                request.Proxy = new WebProxy { UseDefaultCredentials = true };

                request.MaximumResponseHeadersLength = -1;

                request.AllowAutoRedirect = false;

                request.UserAgent = "TLE Retriever v1.5.8";

                request.ContentType = "application/x-www-form-urlencoded";

                request.Method = "GET";

                request.Headers.Add("Accept-Language", "zh-cn");

                request.Headers.Add("Accept-Encoding", "gzip,deflate");

                request.KeepAlive = true;

                if (request == null)

                    return;



                var response = request.GetResponse();

                request.Abort();



                var filename = response.Headers["Content-Disposition"];

                if (string.IsNullOrWhiteSpace(filename))

                    return;



                var pos = filename.ToLower().IndexOf("filename=");

                if (pos <= 0 || pos > filename.Length - 1)

                    return;



                filename = filename.Substring(pos + "filename=".Length);

                filename = HttpUtility.UrlDecode(filename);