获取一个网页数据返回的编码类型是gzip，我该怎么解压缩,高分求助。

sektor 2010-07-02 03:30:26

如题。
在C#区找到一相同问题，无奈对C#太不了解。没有能力把它转成vb.
如下：

http://topic.csdn.net/t/20051224/17/4479341.html

或者：

// 准备请求

HttpWebRequest request = (HttpWebRequest)
WebRequest.Create( "http://gamesir.enorth.com.cn/bbsindex.html ");
request.ProtocolVersion = new Version(1, 1);
request.Accept = "*/* ";
request.Headers.Add( "Accept-Encoding: gzip, deflate ");
request.KeepAlive = true;
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727) ";

// 读取回应

HttpWebResponse response = (HttpWebResponse)request.GetResponse();

Console.WriteLine( "{0} ", response.StatusDescription);
foreach(string key in response.Headers.AllKeys)
{
Console.WriteLine( "{0}: {1} ", key, response.Headers[key]);
}

// 将回应全部读入一个 MemoryStream：

MemoryStream ms = new MemoryStream();
try
{
Stream res = response.GetResponseStream();
byte[] buffer = new byte[8192];
while (true)
{
int read = res.Read(buffer, 0, 8192);
if (read == 0)
{
// 如果服务器用的是 gzip 的话，只能靠读不出更多数据来判断是否已经读完
Console.WriteLine( "Response is terminated due to zero byte reception. ");
break;
}
else
{
ms.Write(buffer, 0, read);
}
}
}
catch (Exception e)
{
// 抛出异常也可能表示已经读完
Console.WriteLine( "Response is terminated due to exception " + e.Message);
}
finally
{
response.Close();
}
Console.WriteLine( "Response has {0} bytes. ", ms.Length);

// ms 倒回开头：

ms.Seek(0, SeekOrigin.Begin);

// 用 GZipInputStream 包裹：

GZipInputStream gzip = new GZipInputStream(ms);

// 用 GZipInputStream 读取 ms 的内容并写入 ms2：

MemoryStream ms2 = new MemoryStream();
try
{
byte[] buffer = new byte[1]; // 一点一点读——因为这个服务器的gzip没有Footer，读到结尾的时候会出错，所以为了把最后一个字节都读出来，只能一点一点读

while (true)
{
int read = gzip.Read(buffer, 0, 1);
if (read == 0) break;
ms2.Write(buffer, 0, read);
}
}
catch (Exception e)
{
Console.WriteLine( "Exception! " + e.ToString());
}
Console.WriteLine( "Unzipped. ");

// 将 ms2（解压后的内容）保存到文件

fs = File.Create( "response.txt ");
ms2.Seek(0, SeekOrigin.Begin);
ms2.WriteTo(fs);
fs.Close();
Console.WriteLine( "Written to response.txt. ");
Console.ReadLine();

...全文