我正在尝试使用 C# WebClient 下载文件。
这是网址:http://www.czce.com.cn/cn/DFSStaticFiles/Future/2018/20180821/FutureDataClearParams.txt http://www.czce.com.cn/cn/DFSStaticFiles/Future/2018/20180821/FutureDataClearParams.txt
如果我手动下载,一切看起来都很好。但是,如果我使用 WebClient 下载文件,内容就会损坏。我尝试过使用许多不同的编码方法。以下是重现该问题的最少代码:
class Program
{
static void Main(string[] args)
{
WebClient client = new WebClient();
client.Proxy = new WebProxy("some company proxy");
string url = "http://www.czce.com.cn/cn/DFSStaticFiles/Future/2018/20180821/FutureDataClearParams.txt";
client.DownloadFile(url, @"D:\file.txt");
}
}
问题现已解决,感谢大家的帮助(@Gauravsa,@John)。该文件确实是 GZipped。
解决办法是:
public class MyWebClient : WebClient
{
protected override WebRequest GetWebRequest(Uri address)
{
HttpWebRequest request = base.GetWebRequest(address) as HttpWebRequest;
request.AutomaticDecompression = DecompressionMethods.Deflate | DecompressionMethods.GZip;
return request;
}
}
Use :
using (WebClient client = new WebClient())
{
client.DownloadFile("http://www.czce.com.cn/cn/DFSStaticFiles/Future/2018/20180821/FutureDataClearParams.txt",
@"c:\Users\Jon\Test\foo.txt");
}
or
using (WebClient client = new WebClient())
{
client.DownloadFile("http://www.czce.com.cn/cn/DFSStaticFiles/Future/2018/20180821/FutureDataClearParams.txt",
"c:\\Users\\Jon\\Test\\foo.txt");
}
您可以执行其他文件 I/O 操作,例如
if(!Directory.Exists("c:\\Users\\Jon\\Test\\")
Directory.CreateDirectory("c:\\Users\\Jon\\Test\\");
...
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