PDF Preview Issues

Original Question or Issue:

PDF previews are not working.

Environment:

• Product - FileCloud Server
• Version - 23.241
• Platform - Any

Steps to Reproduce:

Error or Log Message:

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://my-fc-instance.com/xxx (Reason: CORS header 'Access-Control-Allow-Origin' missing). Status Code: 403.

Defect or Enhancement Number:

Cause:

This is caused when using an S3 bucket for your files without a CORS policy.
A CORS policy is required to ensure your resources can be accessed from a third-party application.

Resolution or Workaround:

To configure the CORS policy:

• Sign in to the AWS Management Console and open the Amazon S3 console at https://console.aws.amazon.com/s3/.
• In the Bucket name list, choose the name of the bucket that you want to create a bucket policy for.
• Choose Permissions, and then choose CORS configuration.
• In the CORS configuration editor text box, type or copy and paste the following CORS configuration:
  
  
  [
      {
          "AllowedHeaders": [
              "*"
          ],
          "AllowedMethods": [
              "GET",
              "PUT",
              "POST",
              "DELETE"
          ],
          "AllowedOrigins": [
              "https://my-fc-instance.com"
          ],
          "ExposeHeaders": [
              "ETag"
          ],
          "MaxAgeSeconds": 3000
      }
  ]

Notes: