如何提取从HttpWebResponse收到的压缩文件? [英] How to extract zipped file received from HttpWebResponse?
问题描述
我将url
放在浏览器的地址栏中,它将zip文件下载到HD.压缩文件的大小为386字节,写在其属性中.
I put url
to browser's address bar and it downloads the zip file to HD. The size of zipped file is 386 bytes as written in its properties.
当我使用UnZipFiles
方法提取文件时-它可以工作.
但是,我想下载程序化并将其提取到内存中.我使用GetResultFromServer
方法获取压缩内容.如标题所示,内容的大小与保存在HD上的压缩文件的大小相同:
When I use UnZipFiles
method to extract the file - it works.
But, I want to download programaticaly and extract it in memory. I use GetResultFromServer
method to get zipped content. As shown in headers the size of the content is the same as the size of zipped file saved on HD:
content-disposition: attachment; filename=emaillog-xml.zip
Content-Length: 386
Cache-Control: private
Content-Type: application/zip
Date: Mon, 10 Sep 2012 08:28:28 GMT
Server: Microsoft-IIS/7.5
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET
我的问题是如何提取GetResultFromServer
返回的内容?
我尝试了以下方法:
My question is how to extract the content returned by GetResultFromServer
?
I tried the following:
var ms = new MemoryStream(Encoding.Unicode.GetBytes(res))
var s = new ZipInputStream(ms);
但是我得到了Unable to read from this stream
.
已更新
我尝试了var zipStream = new System.IO.Compression.GZipStream(response.GetResponseStream(), CompressionMode.Decompress)
,但出现了The magic number in GZip header is not correct
错误
I tried var zipStream = new System.IO.Compression.GZipStream(response.GetResponseStream(), CompressionMode.Decompress)
but I get The magic number in GZip header is not correct
error
代码
private string GetResultFromServer(ElasticLogParams elasticLogParams)
{
var webRequest = (HttpWebRequest)WebRequest.Create(url);
var response = webRequest.GetResponse();
using (var reader = new StreamReader(response.GetResponseStream()))
{
var res = reader.ReadToEnd();
var headers = response.Headers.ToString();
return res;
}
}
public static void UnZipFiles(string zippedFilePath, Stream stream = null)
{
var s = new ZipInputStream(stream ?? File.OpenRead(zippedFilePath));
ZipEntry theEntry;
while ((theEntry = s.GetNextEntry()) != null)
{
using (var streamWriter = File.Create(@"D:\extractedXML.xml"))
{
var size = 2048;
var data = new byte[size];
while (true)
{
size = s.Read(data, 0, size);
if (size > 0)
{
streamWriter.Write(data, 0, size);
}
else
{
break;
}
}
streamWriter.Close();
}
}
s.Close();
}
推荐答案
试一下:
var response = webRequest.GetResponse() as HttpWebResponse;
var stream = response.GetResponseStream();
var s = new ZipInputStream(stream);
I believe you're very close and that you're using the right approach -- you can use this article to back that up -- their code is very similar.
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