In 这个答案中,我描述了如何在 HttpWebResponse 中的响应流周围包装 GZipStream,以便对其进行解压缩。
相关代码如下所示:
HttpWebRequest hwr = (HttpWebRequest) WebRequest.Create(url);
hwr.CookieContainer =
PersistentCookies.GetCookieContainerForUrl(url);
hwr.Accept = "text/xml, */*";
hwr.Headers.Add(HttpRequestHeader.AcceptEncoding, "gzip, deflate");
hwr.Headers.Add(HttpRequestHeader.AcceptLanguage, "en-us");
hwr.UserAgent = "My special app";
hwr.KeepAlive = true;
using (var resp = (HttpWebResponse) hwr.GetResponse())
{
using(Stream s = resp.GetResponseStream())
{
Stream s2 = s;
if (resp.ContentEncoding.ToLower().Contains("gzip"))
s2 = new GZipStream(s2, CompressionMode.Decompress);
else if (resp.ContentEncoding.ToLower().Contains("deflate"))
s2 = new DeflateStream(s2, CompressionMode.Decompress);
... use s2 ...
}
}
有没有办法让 HttpWebResponse 自动提供解压缩流?换句话说,我可以从上面的代码中消除以下内容:
Stream s2 = s;
if (resp.ContentEncoding.ToLower().Contains("gzip"))
s2 = new GZipStream(s2, CompressionMode.Decompress);
else if (resp.ContentEncoding.ToLower().Contains("deflate"))
s2 = new DeflateStream(s2, CompressionMode.Decompress);
Thanks.
Use the HttpWebRequest.AutomaticDecompression属性如下:
HttpWebRequest hwr = (HttpWebRequest) WebRequest.Create(url);
hwr.AutomaticDecompression = DecompressionMethods.Deflate | DecompressionMethods.GZip;
不需要手动添加Accept-Encoding
HTTP 标头;当使用该属性时,它将自动添加。
(另外,我知道这只是示例代码,但是HttpWebResponse
对象应放置在using
块,以便在您使用完它后正确处理它。)
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