Bug #17202

[keep-web] Don't use 303-with-cookie when serving inline preview content as a third-party site

Added by Tom Clegg 10 months ago. Updated 5 months ago.

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When using keep-web to serve inline image content, Workbench2 uses URLs like these:


There are two problems, which together make it impossible for Workbench2 to serve previews:
  1. keep-web responds to the first form with HTTP 303, an equivalent URL with the token part removed, and a cookie containing the token. This is a third-party cookie, which modern browsers reject to avoid XSS attacks, so the 2nd request fails 401.
  2. keep-web has no way of accepting a v2 token in the 2nd form, because a v2 token contains "/" character.
Proposed solutions:
  1. Keep-web should skip the 303-with-cookie behavior when serving inline content as a third party, i.e., when the request Origin header value is non-empty. This way Workbench2 can show inline images with <img crossorigin="anonymous" src="...">. (this part is done & merged, see notes 4-6)
  2. Keep-web should accept an URL-encoded token in the path, like /t=v2%2Fexample%2Fsecretsecrettoken/... (note this will be confusing because the % escape character will need to be escaped in order to appear in a URL: /t=v2%252Fexample%252Fsecretsecrettoken/...)


Task #17203: Review 17202-no-redir-crossoriginResolvedTom Clegg

Related issues

Related to Arvados - Bug #16812: Token appears in the download URL, being shared by accidentResolved10/07/2020

Associated revisions

Revision 91ef36ee
Added by Tom Clegg 10 months ago

Merge branch '17202-no-redir-crossorigin'

refs #17202

Arvados-DCO-1.1-Signed-off-by: Tom Clegg <>


#1 Updated by Tom Clegg 10 months ago

  • Category set to Keep

#2 Updated by Tom Clegg 10 months ago

  • Related to Bug #16812: Token appears in the download URL, being shared by accident added

#3 Updated by Tom Clegg 10 months ago

  • Description updated (diff)

#4 Updated by Tom Clegg 10 months ago

17202-no-redir-crossorigin @ 2c8b44cdaefa4434eadbbe2cb24dabac8cc3bfa9 -- https://ci.arvados.org/view/Developer/job/developer-run-tests/2212/

This should work with image tags like <img crossorigin="anonymous" src="https://download.ce8i5.arvadosapi.com/c=ce8i5-4zz18-ykh8x2x89lq6iet/IMG_20140713_123631.jpg?api_token=v2/foo/bar">

(this is running on ce8i5 now, until we [auto]deploy over it)

#5 Updated by Lucas Di Pentima 10 months ago

This LGTM. Tested manually on wb2 against ce8i5.

#7 Updated by Tom Clegg 9 months ago

  • Description updated (diff)

#8 Updated by Peter Amstutz 8 months ago

  • Release set to 37

#9 Updated by Tom Clegg 5 months ago

  • Assigned To set to Tom Clegg
  • Status changed from New to Resolved

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