[IronPython] Loading DLL from pyc.py into ScriptEngine

Curt Hagenlocher curt at hagenlocher.org
Wed Aug 27 01:03:30 CEST 2008


Are you using Beta 4?  You probably need to grab a post-beta-4 nightly drop;
we got rid of the IsComObject constructions that don't work in partial
trust, but it happened right around the time Beta 4 was released and may not
have made it in.

On Tue, Aug 26, 2008 at 3:54 PM, hellosticky <hellosticky at gmail.com> wrote:

> Okay, I tried it but got a Security Exception in
> System.Scripting.Com.ComMetaObject.IsComObject. The permission requested was
> for UnmanagedCode. I'm running in partial trust so obviously I can't be
> giving the code UnmanagedCode privilege. Is there some flag I have to set
> that says I'm in partial trust?
>
> FirstPermissionThatFailed:
> {<IPermission class="System.Security.Permissions.SecurityPermission,
> mscorlib, Version=2.0.0.0, Culture=neutral,
> PublicKeyToken=b77a5c561934e089"
> version="1"
> Flags="UnmanagedCode"/>
> }
>
> Server stack trace:
>   at
> System.Security.CodeAccessSecurityEngine.ThrowSecurityException(Assembly
> asm, PermissionSet granted, PermissionSet refused, RuntimeMethodHandle rmh,
> SecurityAction action, Object demand, IPermission permThatFailed)
>   at System.Security.CodeAccessSecurityEngine.ThrowSecurityException(Object
> assemblyOrString, PermissionSet granted, PermissionSet refused,
> RuntimeMethodHandle rmh, SecurityAction action, Object demand, IPermission
> permThatFailed)
>   at System.Security.CodeAccessSecurityEngine.CheckSetHelper(PermissionSet
> grants, PermissionSet refused, PermissionSet demands, RuntimeMethodHandle
> rmh, Object assemblyOrString, SecurityAction action, Boolean throwException)
>   at
> System.Security.CodeAccessSecurityEngine.CheckSetHelper(CompressedStack cs,
> PermissionSet grants, PermissionSet refused, PermissionSet demands,
> RuntimeMethodHandle rmh, Assembly asm, SecurityAction action)
>   at System.Scripting.Com.ComMetaObject.IsComObject(Object obj)
>   at System.Scripting.Actions.MetaAction.Bind[T](Object[] args)
>   at System.Scripting.Actions.CallSite`1.CreateNewRule(Rule`1
> originalMonomorphicRule, Object[] args)
>   at System.Scripting.Actions.CallSite`1.UpdateAndExecute(Object[] args)
>   at
> System.Scripting.Actions.UpdateDelegates.Update6[T,T0,T1,T2,T3,T4,T5,TRet](CallSite
> site, T0 arg0, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5)
>   at IronPython.Runtime.Importer.Import(CodeContext context, String
> fullName, PythonTuple from, Int32 level)
>   at IronPython.Runtime.Operations.PythonOps.ImportTop(CodeContext context,
> String fullName, Int32 level)
>   at <module>$2##2(Closure , Scope , LanguageContext )
>   at System.Scripting.ScriptCode.InvokeTarget(LambdaExpression code, Scope
> scope)
>   at
> System.Scripting.Runtime.OptimizedScriptCode.InvokeTarget(LambdaExpression
> code, Scope scope)
>   at System.Scripting.SourceUnit.Execute(Scope scope, ErrorSink errorSink)
>   at Microsoft.Scripting.Hosting.ScriptSource.Execute(ScriptScope scope)
>   at DlrHostedProvider.OnRender()
>
> Here is the code I used (approximately):
>
>                StringBuilder sb = new StringBuilder(100);
>
>            using (MemoryStream ms = new MemoryStream())
>            {
>                using (StringWriter writer = new StringWriter(sb))
>                {
>                    Assembly assembly = Assembly.Load(AssemblyName);
>                    ScriptRuntime runtime = ScriptRuntime.Create();
>                    runtime.LoadAssembly(assembly);
>                    runtime.IO.SetOutput(ms, writer);
>                    ScriptEngine engine =
> runtime.GetEngine(GetEngineName());
>                    ScriptScope scope = engine.CreateScope();
>                    string code = string.Format(@"import clr
> clr.AddReference(""{0}"")
> import {1}
> ",
>     AssemblyName,
>     AssemblyType.Replace(".py", "")
>     );
>                    ScriptSource source =
> engine.CreateScriptSourceFromString(
>                        code,
>                        SourceCodeKind.Statements
>                    );
>                    source.Execute(scope);
>                }
>            }
>            content = sb.ToString();
>
> Thanks,
>
> > -----Original Message-----
> > From: hellosticky [mailto:hellosticky at gmail.com]
> > Sent: Tuesday, August 26, 2008 6:46 PM
> > To: 'Srivatsn Narayanan'; 'Discussion of IronPython'
> > Subject: RE: [IronPython] Loading DLL from pyc.py into ScriptEngine
> >
> > Thanks, I will try that. Can you explain again how just doing
> > "import test" executes the test.py file that was compiled
> > into the DLL? It's not very logical..
> >
> > Thanks,
> >
> > > -----Original Message-----
> > > From: Srivatsn Narayanan [mailto:srivatsn at microsoft.com]
> > > Sent: Tuesday, August 26, 2008 6:34 PM
> > > To: Discussion of IronPython; hellosticky at gmail.com
> > > Subject: RE: [IronPython] Loading DLL from pyc.py into ScriptEngine
> > >
> > > Also Assembly.Load is not sufficient to be able to import the
> > > compiled code. A clr.AddReference needs to be done which
> > > publishes the module. The easiest way to do that is include
> > > it in the string as Michael pointed out.
> > >
>  > > ScriptSource source =
> > > engine.CreateScriptSourceFromString("import
> > > clr;clr.AddReference(\"test.dll\");import test",
> > > SourceCodeKind.Statements);
> > >
> > > You might need to add the current folder to the path as well
> > > before the clr.AddReference.
> > >
> > > -----Original Message-----
> > > From: users-bounces at lists.ironpython.com
> > > [mailto:users-bounces at lists.ironpython.com] On Behalf Of
> > Michael Foord
> > > Sent: Tuesday, August 26, 2008 3:12 PM
> > > To: hellosticky at gmail.com; Discussion of IronPython
> > > Subject: Re: [IronPython] Loading DLL from pyc.py into ScriptEngine
> > >
> > > hellosticky wrote:
> > > > I also tried:
> > > >
> > > >             Assembly assembly = Assembly.Load(AssemblyName);
> > > >             ScriptRuntime runtime = ScriptRuntime.Create();
> > > >             runtime.LoadAssembly(assembly);
> > > >             ScriptScope scope = runtime.ExecuteFile("test.py");
> > > >             object o = scope.Execute(null);
> > > >
> > > > But that threw a script not found exception saying it could
> > > find the source file for test.py, so it would seem like this
> > > wants to recompile it
> > > >
> > > >
> > > >> -----Original Message-----
> > > >> From: hellosticky [mailto:hellosticky at gmail.com]
> > > >> Sent: Tuesday, August 26, 2008 5:52 PM
> > > >> To: IronPython
> > > >> Subject: Loading DLL from pyc.py into ScriptEngine
> > > >>
> > > >> Hi,
> > > >>
> > > >> I created an IronPython DLL with "ipy.exe pyc.py /out:test
> > > >> /target:dll test.py" which created test.dll. Now, from C#,
> > > >> I'd like to execute test.py from test.dll. I just opened up
> > > >> dlr-spec-hosting and there's a CreateScriptSourceFromStream,
> > > >> but I don't see that in 2.0 Beta 4 bits. Here is where I'm
> > > >> stuck. How do I get that assembly into the engine and then
> > > >> execute test.py?
> > >
> > > Well - the easiest way is to execute 'import test' after
> > having added
> > > the assembly. This should execute the code in order to create
> > > a module.
> > >
> > > ScriptScope scope = engine.CreateScope();
> > > ScriptSource source =
> > > engine.CreateScriptSourceFromString("import test",
> > > SourceCodeKind.Statements);
> > > engine.Execute(scope);
> > >
> > > There is an API for setting a stream as stdout on an engine -
> > > 'runtime.IO.SetOutput'.
> > >
> > > Michael
> > >
> > > >>  Also, I'd like to get the output into a
> > > >> string (I guess I can just redirect Console.Out?)
> > > >>
> > > >> public string Execute(string assemblyName)
> > > >> {
> > > >>     string content = null;
> > > >>
> > > >>     Assembly assembly = Assembly.Load(assemblyName);
> > > >>     ScriptRuntime runtime = ScriptRuntime.Create();
> > > >>     ObjectOperations operations = runtime.CreateOperations();
> > > >>     ScriptEngine engine = runtime.GetEngine("py");
> > > >>     // magic..
> > > >>
> > > >>     return content;
> > > >> }
> > > >>
> > > >> Thanks,
> > > >>
> > > >
> > > > _______________________________________________
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> > > >
> > >
> > >
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> > >
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> > >
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>
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