/// <summary>
/// 检查客户端的 ETag 是否已经过期，若未过期则产生一个 HTTP 304 响应
/// </summary>
/// <param name="context">HTTP 上下文</param>
/// <param name="etag">用于与客户端 ETag 比较的，生成的请求内容的 ETag</param>
/// <param name="response">需要发出的 304 响应信息</param>
/// <returns>ETag 是否未过期</returns>
public static bool IsNotModified( HttpContextBase context, string etag, out RawResponse response )
{
if ( context == null )
throw new ArgumentNullException( "context" );
if ( etag == null )
throw new ArgumentNullException( "etag" );
var request = context.Request;
var requestETag = request.Headers["If-None-Match"];
if ( string.Equals( requestETag, etag ) )
{
response = NotModified();
return true;
}
else
{
response = null;
return false;
}
}
/// <summary>
/// 检查客户端的 ETag 是否已经过期，若未过期则产生一个 HTTP 304 响应
/// </summary>
/// <param name="context">HTTP 上下文</param>
/// <param name="etag">用于与客户端 ETag 比较的，生成的请求内容的 ETag</param>
/// <param name="response">需要发出的 304 响应信息</param>
/// <returns>ETag 是否未过期</returns>
public static bool IsNotModified(HttpContextBase context, string etag, out RawResponse response)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
if (etag == null)
{
throw new ArgumentNullException("etag");
}
var request = context.Request;
var requestETag = request.Headers["If-None-Match"];
if (string.Equals(requestETag, etag))
{
response = NotModified();
return(true);
}
else
{
response = null;
return(false);
}
}
/// <summary>
/// 更新缓存
/// </summary>
/// <param name="content">渲染结果</param>
protected virtual ICachedResponse UpdateCache( string content )
{
var response = new RawResponse();
response.Content = content;
response.Headers.Add( "ContentType", "text/html" );
return response;
}
private ICachedResponse CreateCachedResponse( ContentResult content )
{
var response = new RawResponse()
{
Content = content.Content,
ContentEncoding = content.ContentEncoding,
};
response.Headers.Add( "ContentType", content.ContentType );
return response;
}