the infamous "access denied" error image

229

Raniero posted over 16 years ago

Hi all, i'm using infragistics ver 6.3 to generate webcharts(Infragistics2.WebUI.UltraWebChart.v6.3,

Version=6.3.20063.53 and UltraChart.DeploymentScenario.Scenario="Session"), and sometimes(extremely random), i get

the infamous "access denied" error image.

Then after a search, I read this kb:
http://devcenter.infragistics.com/Support/KnowledgeBaseArticle.aspx?ArticleID=2041

I've a mixed scenario with a pure asp page with four charts(generate them by calling aspx pages obiouvsly).
Then I try to turn every caching stuff off.

On pure asp page:
response.expires = -1500
response.AddHeader "PRAGMA", "NO-CACHE"
response.CacheControl = "PRIVATE"
response.Buffer=False

On asp.net pages(chart generating pages):
protected void Page_Load(object sender, System.EventArgs e)
        {
            Response.Expires = 0;
            Response.Cache.SetNoStore();
            Response.AppendHeader("Pragma", "no-cache");
            Response.Cache.SetCacheability(HttpCacheability.NoCache);

But still no luck...

Any suggestion?

Here are some addictional question:

1)
There is a way to inercept the "access denied image" via javascript before diplaying it?
I've seen that the output of a "good generated chart" is nearly the same of a "bad generated chart"
i.e.
<img style=''src='ImagePipe.aspx?ChartID=mychart_Base&KxRx=0x04813>

2)
There is a way to change the "acess denied" image with some sort of custom image/custom text?

3)
The last version of UltraWebChart(8.1.20081.1000) may solve the problem?

Thanks in advance

229

Raniero posted over 16 years ago in reply to Oldrich

No way, the problem still persists. I got the problem both on win2003 and win2000.

Here's a little workaround for medium-high-skilled people. Not applicable for each scenario, but hope it's useful for someone.

You got a chart generating page called "mychart.aspx" like this:

<igchart:UltraChart id="mychart" runat="server" Width="400px" Height="270px" ....

So if you use ajax to call that page, you obtain an image. If you got the "access denied" image you got a 100pixel x 100pixel image, instead of a 400pixel x 270pixel image. Here's the trick: if the image is 100x100 reload(recall mychart.aspx) immediatly.

It works for me. Hope someone find the REAL solution.
Cancel
Reply

Cancel
80

Oldrich posted over 16 years ago in reply to [Infragistics] Rumen Stankov

Thank you for your prompt reply.

I try this steps and still no luck:

1. I disabled Indexing Services at all.

2. I seted "HTTP Headers" - "Expire immediately" for my Web Application in IIS.

3. I seted on asp.net pages (chart generating pages):

Response.Expires = 0;

Response.Cache.SetNoStore();

Response.Cache.SetRevalidation(HttpCacheRevalidation.AllCaches);

Response.Cache.SetCacheability(HttpCacheability.NoCache);

Response.Cache.SetNoServerCaching();

Response.Cache.SetExpires(DateTime.Now);

Response.AppendHeader("Pragma", "no-cache");
4. I seted ImagePipePageName Property to
http://localhost/OO/ImagePipe.aspx

I not see "Access Denied" only during debugging. Users of the web Application see this infamous Image too, but not on each occasion. As I wrote, I have this problem only on Windows Server 2003.
Cancel
Reply

Cancel
28464

[Infragistics] Rumen Stankov posted over 16 years ago in reply to [Infragistics] Rumen Stankov
Also, please check the following KB article in our Dev Center:
http://devcenter.infragistics.com/Support/KnowledgeBaseArticle.Aspx?ArticleID=5010
Here is an explanation of what happens in a Session-Based Deployment Scenario:

After the browser requests the page with the chart, the server will generate the chart and store it in the session state, along with a unique key to identify it.

The server will render an IMG element containing a link to the SecureImagePipe page (typically ImagePipe.aspx), with a QueryString. The QueryString contains the unique key to the chart stored that has been stored in the session state. When the browser makes its request for that IMG, the SecureImagePipe page will load, sending the image to a stream. The image is then available for display in the browser.
This Deployment Scenario has issues when Server Page Caching is on; the result can be an occasional "Access Denied" message, where a browser refresh is needed. Please note that under most circumstances, the "Access Denied" message can only be seen during debugging, when the web application is built and launched in Internet Explorer; users of the web application will not see it, unless server caching is turned on for the pag
Cancel
Reply

Cancel
28464

[Infragistics] Rumen Stankov posted over 16 years ago in reply to Oldrich

I've also found the following forum discussion in forums.asp.net regarding this problem and some approaches there seem to have resolved the problem.
http://forums.asp.net/p/583241/583682.aspx
Could you please try what is suggested there and let us know if this helps?
Cancel
Reply

Cancel
80

Oldrich posted over 16 years ago in reply to [Infragistics] Rumen Stankov

Hello,

I have the same Problem. I am using Infragistics ver 5.1 to generate Webcharts (UltraChart.DeploymentScenario.Scenario="Session"), and sometimes , i get "Access denied" error Image. I try to apply http://support.microsoft.com/kb/329065 , then I disabling Indexing Services at all, but The Problem continue. This Problem is only on Windows Server 2003, it is OK on Windows XP. Can you help me, please?

Thanks in advance.

Oldrich Samolej
Cancel
Reply

Cancel