HTMLview As PDF Viewer

1

I have a web app to display PDF content in a HTMLview. It is worked if URL is called at PC browser (google chrome). However, it showed blank if i have a native app which use location.href=url

code for web app

htmlview1.innerhtml="<iframe src='test.pdf' width=300 height=300></iframe>'
htmlview1.refresh

code for native app

location.href=url

Any idea?
Thanks

2

Yes. You’re probably running into CORS errors.

Connect a remote debugger to your app - you should see error messages when it tries to access the file. You have to give your app permission to access the file.

3

from remote debugger, nothing about CORS error.
what to suggest to have the file access permission setting?

ps: this is workable if is as web app. No need CORS setting if web app?

Thanks
Teo

4

What you’re doing almost certainly requires an entry in your content-security-policy (CSP). I’m surprised there isn’t an error on the console.

5

Here’s a useful site.