/// <summary>
/// 复制请求头
/// </summary>
/// <param name="context"></param>
/// <param name="webRequest"></param>
protected virtual void CopyRequestHeaders(HttpContext context, HttpWebRequest webRequest)
{
// 扩展点：允许替换默认实现方式
// 复制请求头
foreach (string name in context.Request.Headers.AllKeys)
{
// 过滤不允许直接指定的请求头
if (s_IgnoreRequestHeaders.FirstOrDefault(x => x.Equals(name, StringComparison.OrdinalIgnoreCase)) != null)
{
continue;
}
string value = context.Request.Headers[name];
SetRequestHeader(context, webRequest, name, value);
}
// 增加一个特殊的标记，在 StreamResult.cs 中会有对应的处理逻辑
webRequest.Headers.Add("x-HttpProxyHandler", "1");
webRequest.Headers.Add("x-UserHostAddress", context.Request.UserHostAddress);
//webRequest.Headers.Remove("Cache-Control");
if (string.Equals(context.Request.Headers["Connection"], "keep-alive", StringComparison.OrdinalIgnoreCase))
{
webRequest.KeepAlive = true;
}
string referer = context.Request.Headers["Referer"];
if (string.IsNullOrEmpty(referer) == false)
{
if (referer.IndexOf("://") > 0)
{
string refererRoot = UrlExtensions.GetWebSiteRoot(referer);
string requestRoot = UrlExtensions.GetWebSiteRoot(webRequest.RequestUri.AbsoluteUri);
string referer2 = requestRoot + referer.Substring(refererRoot.Length);
SetRequestHeader(context, webRequest, "Referer", referer2);
}
}
}