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我有一個非常基本的ASP.NET響應過濾器,工作「很好」。我用它來替換靜態資源的域。重寫ASP.NET輸出時出現「無效使用響應過濾器」
我在控制器代碼如下所示:
protected override void OnActionExecuted(ActionExecutedContext filterContext)
{
_cdnRewriter.Stream = filterContext.RequestContext.HttpContext.Response.Filter;
filterContext.RequestContext.HttpContext.Response.Filter = _cdnRewriter;
}
而且重寫過濾器本身:
public override void Write(byte[] buffer, int offset, int count)
{
var html = Encoding.Default.GetString(buffer, offset, count);
//manipulate html
byte[] outData = Encoding.Default.GetBytes(html);
Stream.Write(outData, 0, outData.GetLength(0));
}
有關我的網站某些網頁(我找不到情由然而),我可能會有90%的時間出現「HTTP Web Exception:無效使用響應過濾器」。只需刷新了十幾次會得到正確的輸出,但再次刷新將顯示異常:
[HttpException (0x80004005): Invalid use of response filter]
System.Web.HttpResponseStreamFilterSink.VerifyState() +4097234
System.Web.HttpResponseStreamFilterSink.Write(Byte[] buffer, Int32 offset, Int32 count) +28
NeoSmart.Web.CdnRewriteFilter.Write(Byte[] buffer, Int32 offset, Int32 count) +452
System.Web.HttpWriter.FilterIntegrated(Boolean finalFiltering, IIS7WorkerRequest wr) +359
System.Web.HttpResponse.FilterOutput() +121
System.Web.CallFilterExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +119
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +165
我做得不對,我響應濾波器?
如果您可以發佈代碼,這將非常有幫助。 – qakmak