Confluence REST endpoint /rest/api/contentbody/convert/export_view doesn't export emojis

Issue Summary

Unable to download emoticons from their viewformat URL using the Confluence REST endpoint.

Steps to Reproduce

1. Create new Confluence page
2. Insert an emoticon from the set of old emoticons
3. Use /rest/api/contentbody/convert/export_view to get view format

Expected Results

Confluence returns image data or redirects to proper image location.

Actual Results

Confluence redirects to the login page.

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available