[IronPython] Loading DLL from pyc.py into ScriptEngine
Michael Foord
fuzzyman at voidspace.org.uk
Wed Aug 27 00:57:02 CEST 2008
hellosticky 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?
>
Does any part of your application run in full trust? You can create a
runtime with a 'remote' engine inside an appdomain with partial trust.
Not something I'm an expert on however...
Michael
> 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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