em_asm blocks interacting with json.parse somehow?

[r0l...@freemail.hu]

Hi All,

I'm experimenting with a relatively tricky scenario:

https://stackoverflow.com/questions/41753104/how-do-you-use-webmessageport-as-an-alternative-to-addjavascriptinterface

or its github source:

https://github.com/commonsguy/cw-omnibus/tree/master/WebKit/SensorPort

It works fine with normal html+js pages but I decided to do the same with a qt/qml app compiled as webassembly. Seems to work till the point when the EM_ASM block gets called where the global (window) onmessage function gets registered:

EM_ASM(

  var port;

  onmessage=function(e){

    port=e.port[0]

  }

);

That onmessage gets called from java via webview postWebMessage(...) fine but it seems that the parameter that is passed into postWebMessage(...) goes through a JSON.parse and what I get in the incoming 'e' event is just an:

{isTrusted: true}

So the function fails with not being able to access property 0 of undefined.

Does anyone know why the event object does not arrive as expected?

Thanks&regards,

r0ller

[r0l...@freemail.hu]

Headbang: I had a typo in all the magic as e.ports[0] is the right way to access the port.

Sorry for the noise...