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Reflection support missing with WebGL build

Discussion in 'WebGL' started by iileychen, Aug 24, 2016.

  1. iileychen

    iileychen

    Joined:
    Oct 13, 2015
    Posts:
    96
    I can build my project to webgl well, but at runtime it throws the error:

    But it runs well in standalone version. So, does that mean the whole Reflection thing will not work in webgl export?
     
    iileychen, Aug 24, 2016
    #1

  2. JoshPeterson

    JoshPeterson

    Unity Technologies

    Joined:
    Jul 21, 2014
    Posts:
    6,741
    @iileychen

    While reflection will work (i.e. the System.Reflection namespace), dynamic code generation via reflection (i.e. the System.Reflection.Emit namespace) will not work. WebGL is an ahead-of-time (AOT) compiled platform, like iOS and many consoles (XBox One, PS4, etc.). It does not support generation of code at runtime.

    This can be a problem for many serializers, as might be the case here. However, some of them do have an AOT mode which works with WebGL.
     
    JoshPeterson, Aug 24, 2016
    #2

  3. iileychen

    iileychen

    Joined:
    Oct 13, 2015
    Posts:
    96
    Thank you Josh for the explain, that is great WebGL works with reflection.
    Yes, i am using protobuf-net , seems it is the best solution for Unity, but i failed to run it with webgl with that error.

    Do you know is there a way to make (protocol buffers) works in WebGL?
     
    iileychen, Aug 24, 2016
    #3

  4. JoshPeterson

    JoshPeterson

    Unity Technologies

    Joined:
    Jul 21, 2014
    Posts:
    6,741
    @iileychen

    I'm not aware of a way to do this myself, but a Google search for "protobuf-net aot" indicates that it might be possible (there is some discussion here: http://stackoverflow.com/questions/...protobuf-net-getting-executionengineexception).

    If you can get protobuf-net work work with AOT, then it should work on WebGL.
     
    JoshPeterson, Aug 24, 2016
    #4

  5. iileychen

    iileychen

    Joined:
    Oct 13, 2015
    Posts:
    96
    Thank you Josh, your information really helps, finally i found some way to use protobuf-net with aot : precompile the serialization classes, and include the compiled DLL to the project... that is too complex so i give up the whole thing about proto buffer or FlatBuffer i used before, the seems make things complex since i don't serialization cross language now.

    What i need is just a simple fast C# object serialization and very luck of WebGL support basic Reflection, so i write a simple one by myself. That is good for it, most classes in System.Reflection package really works.
     
    iileychen, Aug 25, 2016
    #5