[英]C# DownloadFileTaskAsync not downloading nested zip file
請幫助C#新手,
我正在嘗試使用SSIS中的腳本任務從HTTPS站點下載壓縮文件。 每個“外部” zip文件都包含“內部” zip文件,其中包含3個txt文件。
經過廣泛的搜索,我使用“ await”,“。Wait()”甚至“ while(webClient.IsBusy)”增強了DownloadFileTaskAsync,但仍然設法僅下載空的“外部” zip文件。
請幫助我找到一種下載完整“外部”文件的方法,該方法不會為空,但其中包含“內部” zip和其中的所有3個txt文件:
public async void Main()
{
WebClient webClient = new WebClient();
webClient.Credentials = new NetworkCredential("myuser", "password", "https://example.com/Login.htm");
webClient.DownloadFileTaskAsync(new Uri("https://example.com/#/FROMsender/EXTERNAL_20160706.zip"), @"C:\temp\Test\EXTERNAL_20160706.zip").Wait();
while (webClient.IsBusy) Thread.Sleep(1000);
Dts.TaskResult = (int)ScriptResults.Success;
}
>
試試這個,向webClient添加一些標題:
public async void Main()
{
WebClientEx webClient = new WebClientEx(); // <= use WebClientEx
webClient.Credentials = new NetworkCredential("myuser", "password", "https://example.com/Login.htm");
// Add headers here ------------
webClient.Headers.Add("User-Agent", "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.79 Safari/537.36");
webClient.Headers.Add("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
webClient.Headers.Add("Accept-Language", "en-US,en;q=0.5");
webClient.Headers.Add("Accept-Encoding", "gzip, deflate");
webClient.Headers.Add("Cache-Control", "max-age=0");
webClient.Headers.Add("DNT", "1");
//------------------------------
webClient.DownloadFileTaskAsync(new Uri("https://example.com/#/FROMsender/EXTERNAL_20160706.zip"), @"C:\temp\Test\EXTERNAL_20160706.zip").Wait();
while (webClient.IsBusy) Thread.Sleep(1000);
Dts.TaskResult = (int)ScriptResults.Success;
}
並使用此類代替WebClient:
public class WebClientEx : WebClient
{
protected override WebRequest GetWebRequest(Uri address)
{
var webRequest = (HttpWebRequest) base.GetWebRequest(address);
if (webRequest != null)
{
webRequest.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;
}
return webRequest;
}
}
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