detect items prevented from loading by content security policy

[kenirwin]

Springshare can change the servers that their content loads from (e.g. librarian images, scheduler scripts, etc.). When a new server gets used , our content security policy will prevent unapproved servers from loading content. What mechanisms can we use to detect and report errors?

Some ideas:

• can we detect load problems and log them more clearly in the console?
  • is there a way for these errors to be logged and reported to an admin?
• scan the cache/Librarians.js file for url domains; identify any domains not covered by the csp, including the custom csp additions in default.json (server.csp)
  • this scan could run every time the server starts and report problems to an admin