Forum Discussion

mdrabkin's avatar
mdrabkin
Regular Visitor
8 years ago

Is it possible to load WebAssembly file from custom visual?

Hi,   I'm experimenting with custom visuals development, and was trying to load a .wasm file. Since it requires me to fetch the file, I keep getting cross origin error. I couldn't find anywhere i...
v-viig's avatar
v-viig
Community Champion
8 years ago

WASM is not supported by pbiviz tools. We're migrating to webpack that can compile WASM pretty well.

 

To load external resource such as JS or WASM a server must support CORS.

Otherwise, remote connection will be refused by browser.

 

Ignat Vilesov,

Software Engineer

 

Microsoft Power BI Custom Visuals

[email protected]

 

mdrabkin's avatar
mdrabkin
Regular Visitor
8 years ago

Thank you very much for the response!

 

Yes I know that loading external resources will require the server to enable CORS. 

As the visual is served from app.powerbi.com, I would need to configure powerbi to enable CORS. Is that possible?

Also if there is a way to host the visual ourselves, do you know where I could find some information about it?

 

Thanks,

Maxim

  • v-viig's avatar
    v-viig
    Community Champion
    8 years ago

    We can not control CORS in Power BI. However, you can upload your wasm files to CDN or another server that supports CORS.

     

    What do mean? Do you want to use a visual outside of Power BI?

     

    Ignat Vilesov,

    Software Engineer

     

    Microsoft Power BI Custom Visuals

    [email protected]

    • TienSinh's avatar
      TienSinh
      Frequent Visitor
      3 years ago

      I created a local server on my machine that hosts the .wasm file, but when I try to fetch it from the power bi visual project, it caused an error about CSP `because it violates the following Content Security Policy directive: "default-src <URL> data: blob: 'unsafe-inline' 'unsafe-eval'". Note that 'connect-src' was not explicitly set, so 'default-src' is used as a fallback.` How can I fix this, please help me !!