C# – Text to Speech in ASP.NET – Access is denied… what to do

asp.netctext-to-speechwindows-server-2003

On my personal website, i would like to make it "pronounce" something

I solved the "concept" problem, as in here, and on my desktop it works smoothly when launched from visual web developer. Creates a file, and then an embedded player in the page will play it. Perfect.

So, I uploaded it on the server… I get this error 500:

Server Error in '/sapi' Application.
Access is denied. (Exception from
HRESULT: 0x80070005 (E_ACCESSDENIED))
Description: An unhandled exception
occurred during the execution of the
current web request. Please review the
stack trace for more information about
the error and where it originated in
the code.

Exception Details:
System.UnauthorizedAccessException:
Access is denied. (Exception from
HRESULT: 0x80070005 (E_ACCESSDENIED))

ASP.NET is not authorized to access
the requested resource. Consider
granting access rights to the resource
to the ASP.NET request identity.
ASP.NET has a base process identity
(typically {MACHINE}\ASPNET on IIS 5
or Network Service on IIS 6) that is
used if the application is not
impersonating. If the application is
impersonating via , the identity
will be the anonymous user (typically
IUSR_MACHINENAME) or the authenticated
request user.

(…)

Source Error:

See it below

Source File:
c:\mypath\sapi\myfile.aspx.cs
Line: 21

Stack Trace:

[UnauthorizedAccessException: Access
is denied. (Exception from HRESULT:
0x80070005 (E_ACCESSDENIED))]
SpeechLib.SpVoiceClass.Speak(String
Text, SpeechVoiceSpeakFlags Flags) +0
prova.Button1_Click(Object sender,
EventArgs e) in
c:\mypath\sapi\prova.aspx.cs:21
System.Web.UI.WebControls.Button.OnClick(EventArgs
e) +111
System.Web.UI.WebControls.Button.RaisePostBackEvent(String
eventArgument) +110
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String
eventArgument) +10
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler
sourceControl, String eventArgument)
+13 System.Web.UI.Page.RaisePostBackEvent(NameValueCollection
postData) +36
System.Web.UI.Page.ProcessRequestMain(Boolean
includeStagesBeforeAsyncPoint, Boolean
includeStagesAfterAsyncPoint) +1565

Version Information: Microsoft .NET
Framework Version:2.0.50727.3053;
ASP.NET Version:2.0.50727.3053

This is the source

Source Error:

Line 19: myfile.Open(@"C:\mypath\sapi\gen\hi.wav",SpeechStreamFileMode.SSFMCreateForWrite,false);

Line 20: voice.AudioOutputStream = myfile;

Line 21: voice.Speak("Hi",SpeechVoiceSpeakFlags.SVSFDefault);

I get error on line 21, Voice.speak

That probably means that the aspnet worker user has not some right permission

The generation folder has all the right permissions: an empty file is created.

So, i have to give permission of execute to some system dll?

Do you know which dll? It is not bin\Interop.SpeechLib.dll, on this one the aspnet user has full control

Ps: i have full control on the (windows) server (i mean, access by RDC, is not a shared hosting)

Best Answer

I got it working by setting the AppPool as working as "Local System" and by setting in the machine.config to work as SYSTEM account

Of course i feel that as a security issue, as i am hosting my personal website on the (small) company server (Employees are explicitly authorized to do so by the company owner)

Maybe this is not a good solution?

I set this setting only for this webapp, and i am not so good at coding (so there are lots of bugs in my code, measured in 100 WTFs/minute (haha)

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