Issue when communicating from a Chrome extension

ShinyProxy
#1

Hi,

I’m currently working on a Chrome extension, where the content script will use window.postMessage to post message and on my Shiny App side I have javascript code window.addEventListener("message", function(event) {handleEvent(event)}) . When I tested running the standalone Shiny app without shinyproxy everything works fine, but when I embedded my app into shinyproxy, my app could not receive the message anymore.

One thing I’m suspecting is that accessing the DOM element window has a different meaning when using shinyproxy because I saw it’s using a iframe whose id is “shinyframe” to wrap all the Shiny UI.

Is there any way that I can still send message from a chrome extension injected javascript page to my Shiny Apps DOM, so the customized javascript code resides on the Shiny App will be able to handle the event?

Appreciate your help!

#2

After some research, I figured out it’s because by default chrome extension won’t inject the script into iframes. So I need to set ‘all_frames’ property in the extension’s manifest to true to make it work. Here is a stack overflow post for reference.

#3

Hi @Keqiang_Li,

Thanks for this information.
We are currently evaluating alternatives for the iframe, to allow easier embedding of ShinyProxy in other web apps.

Regards,
Frederick