Q: Loading pdf file from AWS s3 into iframe does not work in IE 11 I have ASP.NET Core web application. The view is using iframe to load PDF file from amazon s3.
<iframe style="width:100%;height:100vh" src="https://xxxx.s3-us-west-2.amazonaws.com/mybucket/a_01_03_44_35_5745663485955446.pdf"></iframe>

The above code was working fine until recently.
Now iframe does not show any pdf. When i check network using F12 it shows Protocol and Result/Description as Pending

if copy the URL and paste it into IE 11 directly then browser shows the file.
The above behavior is happening in IE 11 and IE Edge, as usual chrome works fine.
I am not sure if recent windows update has got anything to do with this.
Update 1
I take it back, I cannot open S3 url in IE 11 or IE Edge directly either.

A: This has nothing to do with ASP.NET Core. Why don't you load the PDF with HttpClient and serve it through a controller. Could also have the benefit that you can cache it if this is frequently requested. Or better use the AWS SDK. 

A: I have the same problem since the begining of 2017/08. The difference is I cannot open the url directly on IE11 and Edge eigther. The F12 network tab also shows both Protocal and Result/Description as Pending. No problem on Chrome, firefox and safari.
Several PCs in our company started having this problem from the same time.
Here is a sample url
(please open this by IE11 on Windows10).
