Text to Speech in ASP.NET - Access is denied… what to do?

问题

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)

回答1:

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)

回答2:

I have had similar problems, after many headaches i did manage to solve the issue with me. I found two problems the first being the browser, i found for my purpose only ie explorer would work and not other browsers such as mozilla. The second problem was finally the permissions, even though i had all permissions correctly i found that i had to remove the internet user permission and check the log on as local account option which then worked.

来源：https://stackoverflow.com/questions/1022356/text-to-speech-in-asp-net-access-is-denied-what-to-do