public override void Write(byte[] buffer, int offset, int count)
{
if (m_Response.StatusCode != 200) // 比如301或302跳转的
{
m_Filter.Write(buffer, offset, count);
return;
}
var item = RouteHelper.GetCurrentConfigRouteItem();
if (item.ServerCacheExpiredMinutes > 0 && m_HasCacheItem == false) // 需要服务器端缓存，但还没有缓存
{
var citem = m_HttpContext.Items["RouteCacheFilterAttribute.citem"] as CacheItem;
if (citem == null) // 这样做目的是为了确保Write方法可能被多次调用时不会出错
{
citem = new CacheItem {
Html = new List <byte>(count)
};
for (int i = offset; i < count; i++)
{
citem.Html.Add(buffer[i]);
}
string key = GenerateServerCacheKey(m_HttpContext);
m_HttpContext.Items["RouteCacheFilterAttribute.citem"] = citem;
Cache.SetLocalCache(key, citem, true, item.ServerCacheExpiredMinutes); // 此时将缓存数据放入全局Cache中，可以被其他访问请求看到和读取了
}
else
{
for (int i = offset; i < count; i++)
{
citem.Html.Add(buffer[i]);
}
}
}
m_Filter.Write(buffer, offset, count);
}
protected override bool CheckAuthentication()
{
var routeItem = RouteHelper.GetCurrentConfigRouteItem();
bool need = routeItem == null ? false : routeItem.NeedLogin;
if (need == false)
{
return(true);
}
return(base.CheckAuthentication());
}
public override void Write(byte[] buffer, int offset, int count)
{
if (m_Response.StatusCode != 200) // 比如301或302跳转的
{
m_Filter.Write(buffer, offset, count);
return;
}
string clientToken = m_Request.Headers["If-None-Match"];
if (m_ETag != clientToken)
{
var item = RouteHelper.GetCurrentConfigRouteItem();
if (item.ServerCacheExpiredMinutes > 0 && m_HasCacheItem == false) // 需要服务器端缓存，但还没有缓存
{
var citem = m_HttpContext.Items["RouteCacheFilterAttribute.citem"] as CacheItem;
if (citem == null) // 这样做目的是为了确保Write方法可能被多次调用时不会出错
{
citem = new CacheItem {
Html = new List <byte>(count)
};
for (int i = offset; i < count; i++)
{
citem.Html.Add(buffer[i]);
}
string key = GenerateServerCacheKey(m_HttpContext);
m_HttpContext.Items["RouteCacheFilterAttribute.citem"] = citem;
Cache.SetLocalCache(key, citem, true, item.ServerCacheExpiredMinutes); // 此时将缓存数据放入全局Cache中，可以被其他访问请求看到和读取了
}
else
{
for (int i = offset; i < count; i++)
{
citem.Html.Add(buffer[i]);
}
}
}
m_Response.AddHeader("ETag", m_ETag);
m_Filter.Write(buffer, offset, count);
}
else
{
m_Response.SuppressContent = true;
m_Response.StatusCode = 304;
m_Response.StatusDescription = "Not Modified";
//m_Response.AddHeader("Content-Length", "0");
}
}
public override void OnResultExecuting(ResultExecutingContext filterContext)
{
var item = RouteHelper.GetCurrentConfigRouteItem();
CacheItem citem = null;
if (item.ServerCacheExpiredMinutes > 0) // 需要服务端缓存
{
citem = filterContext.HttpContext.Items["RouteCacheFilterAttribute.citem"] as CacheItem;
}
if (item == null || item.ClientCache == ClientCacheMode.Default)
{
filterContext.HttpContext.Response.Filter = new ServerCacheFilter(filterContext.HttpContext, item.ServerCacheExpiredMinutes, citem != null);
return;
}
if (item.ClientCache == ClientCacheMode.None)
{
// 让每一次的etag都不一样，防止iis级别上的Etag缓存设置
filterContext.HttpContext.Response.AddHeader("ETag", Guid.NewGuid().ToString());
// abandon cache
filterContext.HttpContext.Response.Expires = -1;
filterContext.HttpContext.Response.ExpiresAbsolute = DateTime.Now.AddSeconds(-1);
filterContext.HttpContext.Response.CacheControl = "no-cache";
filterContext.HttpContext.Response.Cache.SetExpires(DateTime.Now.AddSeconds(-1));
filterContext.HttpContext.Response.Cache.SetCacheability(HttpCacheability.NoCache);
filterContext.HttpContext.Response.Cache.SetNoStore();
filterContext.HttpContext.Response.Filter = new ServerCacheFilter(filterContext.HttpContext, item.ServerCacheExpiredMinutes, citem != null);
}
else if (item.ClientCache == ClientCacheMode.Permanent304)
{
string etag = item.ETag;
if (string.IsNullOrWhiteSpace(etag))
{
etag = s_ETag;
}
filterContext.HttpContext.Response.Filter = new PermanentNotModifiedFilter(filterContext.HttpContext,
etag, item.ServerCacheExpiredMinutes, citem != null);
}
else if (item.ClientCache == ClientCacheMode.Unchanged304)
{
filterContext.HttpContext.Response.Filter = new ContentNotModifiedFilter(filterContext.HttpContext, item.ServerCacheExpiredMinutes, citem != null);
}
else
{
filterContext.HttpContext.Response.Filter = new ServerCacheFilter(filterContext.HttpContext, item.ServerCacheExpiredMinutes, citem != null);
}
}
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
var item = RouteHelper.GetCurrentConfigRouteItem();
if (item.ServerCacheExpiredMinutes > 0)
{
string key = GenerateServerCacheKey(filterContext.HttpContext);
CacheItem citem = Cache.GetLocalCache(key) as CacheItem;
if (citem != null)
{
string c = "1";
using (var stream = new MemoryStream(citem.Html.ToArray()))
{
using (var sr = new StreamReader(stream))
{
c = sr.ReadToEnd();
}
}
filterContext.HttpContext.Items["RouteCacheFilterAttribute.citem"] = citem;
filterContext.HttpContext.Items["RouteCacheFilterAttribute.FindItem"] = "1";
filterContext.Result = new ContentResult()
{
Content = c
}; // 避免再执行Action和View的Render
return;
}
}
if (item.ClientCache == ClientCacheMode.Permanent304)
{
string etag = item.ETag;
if (string.IsNullOrWhiteSpace(etag))
{
etag = s_ETag;
}
string clientToken = filterContext.HttpContext.Request.Headers["If-None-Match"];
if (etag == clientToken)
{
filterContext.Result = new ContentResult()
{
Content = "1"
}; // 避免再执行Action和View的Render
return;
}
}
base.OnActionExecuting(filterContext);
}
protected string GetConfiguredSchema()
{
var config = RouteHelper.GetCurrentConfigRouteItem();
string domain = config == null ? string.Empty : config.Domain;
object tmp;
if (string.IsNullOrWhiteSpace(domain) &&
RouteHelper.TryGetDataTokenOfCurrentRoute("_ibb_domain", out tmp) && tmp != null)
{
domain = tmp.ToString();
}
if (string.IsNullOrWhiteSpace(domain))
{
return("http");
}
if (domain.StartsWith("https://", StringComparison.InvariantCultureIgnoreCase))
{
return("https");
}
return("http");
}
protected override bool CheckNeedTrace(HttpContextBase httpContext)
{
var item = RouteHelper.GetCurrentConfigRouteItem();
return(base.CheckNeedTrace(httpContext) && (item == null || item.Trace));
}
