/// <summary>
/// 建立請求的頭檔
/// </summary>
/// <param name="request"></param>
/// <param name="headers"></param>
/// <returns></returns>
public static HttpWebRequest BuildRequestHeader(HttpWebRequest request, HttpHeaderList headers)
{
foreach (String h in headers.GetHeaderKeys())
{
switch (h.Trim().ToLower())
{
case "accept":
request.Accept = headers.GetHeaderValue(h);
break;
case "accept-encoding":
if (headers.GetHeaderValue(h).ToLower().Contains("gzip") &&
headers.GetHeaderValue(h).ToLower().Contains("deflate"))
{
request.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;
}
else if (headers.GetHeaderValue(h).ToLower().Contains("gzip"))
{
request.AutomaticDecompression = DecompressionMethods.GZip;
}
else if (headers.GetHeaderValue(h).ToLower().Contains("deflate"))
{
request.AutomaticDecompression = DecompressionMethods.Deflate;
}
break;
case "authorization":
request.PreAuthenticate = true;
request.Headers.Add("Authorization", headers.GetHeaderValue(h));
break;
case "connection":
{
string connectionValue = headers.GetHeaderValue(h).Trim().ToLower();
if (connectionValue.Contains("keep-alive"))
{ request.KeepAlive = true; }
if (connectionValue.Contains("upgrade"))
{ request.Headers.Add("Connection", "Upgrade"); }
}
break;
case "content-type":
request.ContentType = headers.GetHeaderValue(h);
break;
case "content-length":
request.ContentLength = Convert.ToInt64(headers.GetHeaderValue(h));
break;
case "date":
request.Date = Convert.ToDateTime(headers.GetHeaderValue(h));
break;
case "expect":
request.Expect = headers.GetHeaderValue(h);
break;
case "host":
request.Host = headers.GetHeaderValue(h);
break;
case "if-modified-since":
request.IfModifiedSince = Convert.ToDateTime(headers.GetHeaderValue(h));
break;
case "referer":
request.Referer = headers.GetHeaderValue(h);
break;
case "user-agent":
request.UserAgent = headers.GetHeaderValue(h);
break;
default:
request.Headers.Add(h, headers.GetHeaderValue(h));
break;
}
}
return request;
}
