I’m toying around with the idea of a simple in-browser “coding
for IronRuby, think JSFiddle but for DLR languages. I’m fairly new to
IronRuby, but have lots of Silverlight experience. I have gotten the
up and running, but have ran into a couple issues.
My initial idea was to use the virtual file system the IronPython
Silverlight Host creates when it downloads files included using
tags. However, turns out this virtual file system is read-only, so I
write new Ruby files after the application is loaded.
My second idea was to simply use the DynamicEngine and simply execute
code. The code I’ve written looks something like this:
def run_tests code = window.eval("codeEditor.getCode()").to_s test = window.eval("testEditor.getCode()").to_s puts code begin dyneng = DynamicEngine.new engine = dyneng.runtime.get_engine("ruby") scope = dyneng.create_scope errorFormatter = ErrorFormatter::Sink.new resultCode =
puts resultCode puts resultTest rescue => ex puts ex.to_s end end
It basically gets two pieces of Ruby code, then creates a new engine,
creates script source, compiles it, and then executes it. If I do this
valid Ruby code everything works as expected. However, if I try to
invalid code I was expecting my error handler to execute. But this does
happen. All I get is an error in the FireBug console saying:
“Error calling method on NPObject!”
So does anyone have suggestions on how to handle errors when executing
code dynamically in the browser. Secondly, does anyone have suggestions
alternative approaches to implementing this - i.e. make the virtual file
system writable (write to isolated storage perhaps?).