# Abusing HTTP Status Codes to Expose Private Information

<https://grepular.com/Abusing_HTTP_Status_Codes_to_Expose_Private_Information>

- Host: [grepular.com](https://links.thingelstad.xyz/hosts/grepular.com/)
- Saved: February 3, 2011 (2011-02-03T19:36:51Z)
- Record: https://links.thingelstad.xyz/links/30b9c05a337b/
- JSON: https://links.thingelstad.xyz/links/30b9c05a337b.json

## From the page (probably an excerpt, not Jamie's words)

Ignoring the privacy implications for a second, as a website developer, you might like to know if your visitors are logged into GMail; you could use that information to automatically fill the email fields in your forms with "@gmail.com"... Perhaps you might want to make your Facebook "like" buttons more prominent if you can tell your visitor is logged into Facebook at the moment? Here's how I achieve this:

## Facts

- Kind: [Page](https://links.thingelstad.xyz/kinds/page/)

## Saved the same week

- [What Makes a Hit (Consumer) Internet Service: Tech News and Analysis «](https://links.thingelstad.xyz/links/bd9fa85a974d/) (gigaom.com, February 2, 2011)
- [Does Assange have an agenda?](https://links.thingelstad.xyz/links/13d4240191bd/) (scripting.com, February 2, 2011)
- [What Is Facebook, Really?](https://links.thingelstad.xyz/links/097ee12e33c2/) (blogs.hbr.org, February 3, 2011)
- [Should we trust Bill Keller?](https://links.thingelstad.xyz/links/68b3299f8ee0/) (scripting.com, February 4, 2011)
- [The Two Paths to Success](https://links.thingelstad.xyz/links/1a138ab80fd4/) (paulbuchheit.blogspot.com, February 4, 2011)

## Elsewhere

- Wayback Machine: https://web.archive.org/web/*/https://grepular.com/Abusing_HTTP_Status_Codes_to_Expose_Private_Information