Re:Facebook crawls links in PDFs you send in Messenger
by yawaramin on Saturday October 26, 2019 @01:36PM
(#21365051)
WhatsApp fetches a link preview on the sender's device before the message is encrypted, and packages it up with the message before sending. Depending on how exactly they implement the fetch, they may or may not know what links you sent.
[ Parent
| on HN ]
Re:Facebook crawls links in PDFs you send in Messenger
by Sami_Lehtinen on Saturday October 26, 2019 @01:52PM
(#21365144)
At least links in PDF over WA didn't get visited from FB servers. I just personally tested it moments ago.