Public PDF links

Fetched by Capable's own URL proxy rather than by the reader's browser, because most PDF hosts will not allow a browser on another domain to read their files. The bytes pass through Capable infrastructure. This is why no per-domain admin approval is needed for arbitrary PDF links, and also why the proxy's size and host rules apply.


#Where you do it

Task

Where

Embed a PDF from a public web address

Macro config > Types of file = Public URL > PDF URL

Check what signed-out readers of a public page will se

Open the page while logged out


#Limits that apply here

Limit

Value

What happens

Linked PDF size ceiling

2.5 MB

A PDF fetched from a public web address is refused above 2.5 MB and the macro shows "This PDF is too large". Attachments do not go through the proxy and are not subject to this cap. The limit is not s

Link rules enforced by the proxy

Https only; no bare IP addresses; no int

Http links are upgraded to https and then required to be https. Blocked outright: localhost, example.com/.org/.net, test.com, anything under amazonaws.com or amazon.com, nip.io, and the .corp .domain


#Worth knowing

  • Signed-out readers never see the document, on any source, even on a public page.

  • Linked PDFs must be on public https. Plain http, IP addresses, intranet hosts, .local/.corp/.lan/.test style domains and anything under amazonaws.com will not load.

  • Pasted PDF links are not automatically converted into the macro.



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