[Ironpython-users] Problem with embedding IronPython into Silverlight Application

Thu Apr 19 19:38:44 CEST 2012

I think the binaries under: lib\Sl5 is compiled with SL4 as target and not
with SL5, not sure but that may be the issue.

/Mattias

2012/4/19 Slide <slide.o.mix at gmail.com>

> No, that is correct, SL5 does include the FEATURE_ASSEMBLY_LOCATION
> property in the build, so you should be getting that code when you
> disassemble. Can you check if there is anything in the InnerException when
> you catch it?
>
>
> On Thu, Apr 19, 2012 at 7:28 AM, Mattias Ahlenius <
> mattias at goodsolutions.se> wrote:
>
>> Do I do something fundamentally wrong here... The below is what I get do
>> a disasm on the SL5 assembly in the latest distribution (2.7.2.1)
>>
>> Greatful for any help I could get in the right direction.
>>
>> Best regards,
>>
>> Mattias
>>
>>
>> 2012/4/18 Mattias Ahlenius <mattias at goodsolutions.se>
>>
>>>
>>> I get the following when I make a disam in Reflector, the exception
>>> (System.MethodAccessException) that I'm getting is not subclassing neither
>>> SecurityException or ArgumentException which is catched and handled.
>>>
>>>
>>>  *private static string <http://www.aisto.com/roeder/dotnet/Default.aspx?Target=code://mscorlib:5.0.5.0:7cec85d7bea7798e/System.String> GetPrefix <http://www.aisto.com/roeder/dotnet/Default.aspx?Target=code://IronPython:2.7.1300.40:7f709c5b713576e1/IronPython.Modules.SysModule/GetPrefix():String>()
>>> {
>>>     try
>>>     {
>>>         return Path <http://www.aisto.com/roeder/dotnet/Default.aspx?Target=code://mscorlib:5.0.5.0:7cec85d7bea7798e/System.IO.Path>.GetDirectoryName <http://www.aisto.com/roeder/dotnet/Default.aspx?Target=code://mscorlib:5.0.5.0:7cec85d7bea7798e/System.IO.Path/GetDirectoryName(String):String>(Assembly <http://www.aisto.com/roeder/dotnet/Default.aspx?Target=code://mscorlib:5.0.5.0:7cec85d7bea7798e/System.Reflection.Assembly>.GetExecutingAssembly <http://www.aisto.com/roeder/dotnet/Default.aspx?Target=code://mscorlib:5.0.5.0:7cec85d7bea7798e/System.Reflection.Assembly/GetExecutingAssembly():System.Reflection.Assembly>().Location <http://www.aisto.com/roeder/dotnet/Default.aspx?Target=code://mscorlib:4.0.0.0:b77a5c561934e089/System.Reflection.Assembly/property:Location:String>);
>>>     }
>>>     catch (SecurityException <http://www.aisto.com/roeder/dotnet/Default.aspx?Target=code://mscorlib:5.0.5.0:7cec85d7bea7798e/System.Security.SecurityException>)
>>>     {
>>>         return string <http://www.aisto.com/roeder/dotnet/Default.aspx?Target=code://mscorlib:5.0.5.0:7cec85d7bea7798e/System.String>.Empty <http://www.aisto.com/roeder/dotnet/Default.aspx?Target=code://mscorlib:5.0.5.0:7cec85d7bea7798e/System.String/Empty>;
>>>     }
>>>     catch (ArgumentException <http://www.aisto.com/roeder/dotnet/Default.aspx?Target=code://mscorlib:5.0.5.0:7cec85d7bea7798e/System.ArgumentException>)
>>>     {
>>>         return string <http://www.aisto.com/roeder/dotnet/Default.aspx?Target=code://mscorlib:5.0.5.0:7cec85d7bea7798e/System.String>.Empty <http://www.aisto.com/roeder/dotnet/Default.aspx?Target=code://mscorlib:5.0.5.0:7cec85d7bea7798e/System.String/Empty>;
>>>     }
>>> }*
>>>
>>> **/Mattias
>>> *
>>> *
>>>
>>> 2012/4/18 Slide <slide.o.mix at gmail.com>
>>>
>>>> This really sounds like the assemblies you are referencing are not
>>>> really the SL assemblies, can you open the assembly in ILSpy and decompile
>>>> GetPrefix and see what you have?
>>>>
>>>> slide
>>>>
>>>>
>>>> On Wed, Apr 18, 2012 at 1:44 PM, Mattias Ahlenius <
>>>> mattias at goodsolutions.se> wrote:
>>>>
>>>>> Same exception even if I use the 2.7.2.1 bins: (I support you mean
>>>>> 2.7.. and not 2.5..)
>>>>>
>>>>> Message: Failed to load language 'IronPython 2.7.2.1': The type
>>>>> initializer for 'IronPython.Modules.SysModule' threw an exception.
>>>>>
>>>>> InnerException:
>>>>>
>>>>> "Attempt by security transparent method
>>>>> 'IronPython.Modules.SysModule.GetPrefix()' to access security critical
>>>>> method 'System.Reflection.Assembly.get_Location()' failed."
>>>>>
>>>>> /Mattias
>>>>>
>>>>> 2012/4/18 Slide <slide.o.mix at gmail.com>
>>>>>
>>>>>> Please make sure you have 2.5.2.1 and not just 2.5.2.
>>>>>>
>>>>>> On Wed, Apr 18, 2012 at 12:16 PM, Mattias Ahlenius
>>>>>> <mattias at goodsolutions.se> wrote:
>>>>>> > Thanks for your quick reply Keith,
>>>>>> >
>>>>>> > Tried you code and I still get the same Exception:
>>>>>> >
>>>>>> > "Attempt by security transparent method
>>>>>> > 'IronPython.Modules.SysModule.GetPrefix()' to access security
>>>>>> critical
>>>>>> > method 'System.Reflection.Assembly.get_Location()' failed."
>>>>>> >
>>>>>> > /Mattias
>>>>>> >
>>>>>> >
>>>>>> >
>>>>>> > 2012/4/18 Keith Rome <rome at wintellect.com>
>>>>>> >>
>>>>>> >> Does this not work for you?
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >> using IronPython.Hosting;
>>>>>> >>
>>>>>> >> // ...
>>>>>> >>
>>>>>> >> _python = Python.CreateEngine();
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >> I believe that should handle the simple/typical scenarios, unless
>>>>>> you need
>>>>>> >> to alter the environment (such as plugging in a custom Host/PAL).
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >> If you need to customize the environment, then this should work:
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >> var options = new Dictionary<string, object>();
>>>>>> >>
>>>>>> >> ScriptRuntimeSetup setup = Python.CreateRuntimeSetup(options);
>>>>>> >>
>>>>>> >> _runtime = new ScriptRuntime(setup);
>>>>>> >>
>>>>>> >> _python = Python.GetEngine(_runtime);
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >> This code should work exactly the same on desktop CLR and
>>>>>> Silverlight.
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >> Keith Rome
>>>>>> >>
>>>>>> >> Senior Consultant and Architect
>>>>>> >>
>>>>>> >> MCPD-EAD, MCSD, MCDBA, MCTS-WPF, MCTS-TFS, MCTS-WSS
>>>>>> >>
>>>>>> >> Wintellect | 770.617.4016 | krome at wintellect.com
>>>>>> >>
>>>>>> >> www.wintellect.com
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >> From: ironpython-users-bounces+rome=wintellect.com at python.org
>>>>>> >> [mailto:ironpython-users-bounces+rome=wintellect.com at python.org]
>>>>>> On Behalf
>>>>>> >> Of Mattias Ahlenius
>>>>>> >> Sent: Wednesday, April 18, 2012 2:41 PM
>>>>>> >> To: ironpython-users at python.org
>>>>>> >> Subject: [Ironpython-users] Problem with embedding IronPython into
>>>>>> >> Silverlight Application
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >> Hi,
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >> I'm new to scripting and would like to add support for IronPython
>>>>>> to our
>>>>>> >> Silverlight application, I have tried to find an answer on the net
>>>>>> but could
>>>>>> >> not find anyone else facing the same problem. The app is an out of
>>>>>> browser
>>>>>> >> application.
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >> I've added the latest release (2.7.2) from nuget, checked that the
>>>>>> >> binaries being used is from the SL5
>>>>>> libs-catalog: IronPython.2.7.2\lib\Sl5
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >> The code I use to create the scripting engine is the following:
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >> ..
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>>             _runtime = new ScriptRuntime(DynamicEngine.CreateRuntimeSetup(true));
>>>>>> >>
>>>>>> >>             _python = _runtime.GetEngine("py");
>>>>>> >>
>>>>>> >> ..
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >> When GetEngine is executed I'll the following secutiry exception:
>>>>>> >>
>>>>>> >> "{System.MethodAccessException: Attempt by security transparent
>>>>>> method
>>>>>> >> 'IronPython.Modules.SysModule.GetPrefix()' to access security
>>>>>> critical
>>>>>> >> method 'System.Reflection.Assembly.get_Location()' failed.
>>>>>> >>
>>>>>> >>    at IronPython.Modules.SysModule.GetPrefix()
>>>>>> >>
>>>>>> >>    at IronPython.Modules.SysModule..cctor()}"
>>>>>> >>
>>>>>> >> When checking the code at GitHub for the method: GetPrefix()
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >> There are code checking a compiler-constant that seems to be if you
>>>>>> >> running in "silverlight" (don't have diskaccess to the libs), but
>>>>>> the code
>>>>>> >> seems to be executed anyway, which makes me wonder if I still
>>>>>> doesn't use
>>>>>> >> the correct libs for Silverlight.
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >> Would really appreciate if someone could point me in the right
>>>>>> direction.
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >> Have a nice day!
>>>>>> >>
>>>>>> >> --
>>>>>> >>
>>>>>> >> Best regards,
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >> Mattias Ahlenius
>>>>>> >>
>>>>>> >> 031 - 788 19 25
>>>>>> >>
>>>>>> >>
>>>>>> >>
>>>>>> >> Good Solutions AB
>>>>>> >>
>>>>>> >> http://www.goodsolutions.se
>>>>>> >>
>>>>>> >>
>>>>>> >
>>>>>> >
>>>>>> >
>>>>>> >
>>>>>> > --
>>>>>> >
>>>>>> > Med vänlig hälsning,
>>>>>> >
>>>>>> > Mattias Ahlenius
>>>>>> > 031 - 788 19 25
>>>>>> >
>>>>>> > Good Solutions AB
>>>>>> > http://www.goodsolutions.se
>>>>>> >
>>>>>> >
>>>>>> > _______________________________________________
>>>>>> > Ironpython-users mailing list
>>>>>> > Ironpython-users at python.org
>>>>>> > http://mail.python.org/mailman/listinfo/ironpython-users
>>>>>> >
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Website: http://earl-of-code.com
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>>
>>>>> Med vänlig hälsning,
>>>>>
>>>>> Mattias Ahlenius
>>>>> 031 - 788 19 25
>>>>>
>>>>> Good Solutions AB
>>>>> http://www.goodsolutions.se
>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> Website: http://earl-of-code.com
>>>>
>>>
>>>
>>>
>>> --
>>>
>>> Med vänlig hälsning,
>>>
>>> Mattias Ahlenius
>>> 031 - 788 19 25
>>>
>>> Good Solutions AB
>>> http://www.goodsolutions.se
>>>
>>>
>>
>>
>> --
>>
>> Med vänlig hälsning,
>>
>> Mattias Ahlenius
>> 031 - 788 19 25
>>
>> Good Solutions AB
>> http://www.goodsolutions.se
>>
>>
>
>
> --
> Website: http://earl-of-code.com
>

-- 

Med vänlig hälsning,

Mattias Ahlenius
031 - 788 19 25

Good Solutions AB
http://www.goodsolutions.se
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