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

Mattias Ahlenius mattias at goodsolutions.se
Thu Apr 19 20:16:28 CEST 2012 

I've put together a small testproject, when I build it with target SL4 I
get the same error as with the IronPython bins, but it works fine when I
compile it to target SL5, I've attached a testproject as a .zip (just
rename it from sip)

/Mattias

2012/4/19 Mattias Ahlenius <mattias at goodsolutions.se>

> 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
>
>


-- 

Med vänlig hälsning,

Mattias Ahlenius
031 - 788 19 25

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