/// <summary>
/// 获取HttpWebResponse内流的编码格式并返回内含的流
/// </summary>
/// <param name="myResponse">Internet资源的响应</param>
/// <param name="stream">返回流</param>
/// <returns>流的编码</returns>
public Encoding Detector(HttpWebResponse response, out Stream stream)
{
var encoding = Detect(response.CharacterSet);
if (encoding == null)
{
encoding = Detect(RegexUtility.GetFirstMatch(reg, response.ContentType));
}
if (encoding != null)
{
stream = response.GetResponseStream();
return(encoding);
}
return(ByHtmlCharset(response.GetResponseStream(), out stream));
}
/// <summary>
/// 根据页面内容获取流的编码形式，如果没有则默认为系统编码
/// </summary>
/// <param name="memoryStream">内存流</param>
private Encoding ByHtmlCharset(Stream rs, out Stream ms)
{
ms = rs.ToMemoryStream();
var streamReader = new StreamReader(ms, Encoding.ASCII);
var html = streamReader.ReadToEnd();
var encode = DefaultEncoding;
if (reg.IsMatch(html))
{
encode = ConvertEncoding(RegexUtility.GetFirstMatch(reg, html));
}
ms.Seek(0, SeekOrigin.Begin);
return(encode);
}