我的目标是使用 C++/Winsock 登录 vBulletin 论坛。论坛是 forums.randi.org
为此，我一直在嗅探数据包，这是服务器对提供登录详细信息的 POST 请求的响应的标头：
HTTP/1.1 200 OK
Date Tue, 19 Feb 2013 18:12:52 GMT
Server Apache/2.0.63 (Unix) mod_ssl/2.0.63 OpenSSL/0.9.8e-fips-rhel5 mod_bwlimited/1.4 PHP/5.2.8
X-Powered-By PHP/5.2.8
Set-Cookie bblastvisit=1361297572; expires=Wed, 19-Feb-2014 18:12:52 GMT; path=/
Set-Cookie bblastactivity=0; expires=Wed, 19-Feb-2014 18:12:52 GMT; path=/
Set-Cookie bbwelcomeheaders=1361297572; path=/
Set-Cookie bbsessionhash=9ad9da23b1399e81772437c3819a2501; path=/; HttpOnly
Cache-Control private
Pragma private
X-UA-Compatible IE=7
Content-Encoding gzip
Content-Length 2152
Connection close
Content-Type text/html; charset=ISO-8859-1
我的问题是我一直试图阅读响应的内容无济于事。如标题所示，内容的长度应为 2152 字节。我确实将 2152 个字节读入了一些缓冲区，但它们是乱码（而响应标头看起来非常好）。同时，我的嗅探器（HttpFox，一个 Firefox 插件）显示了一个完全合法的内容，但其大小远大于指示的 2152 字节（大约 5900 字节）。
成功登录后由嗅探器检索的内容如下。我想知道如何使用 winsock 读取此内容，为什么这比标题中指示的 Content-Length 长得多。
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