bugGNU Wget - Bugs: bug #37986, Redirection to the same url...


bug #37986: Redirection to the same url prevents recursion

Submitted by:  Enne Walker <enne>
Submitted on:  Fri 28 Dec 2012 07:26:46 AM UTC  
Category:  Program Logic Severity:  3 - Normal
Priority:  5 - Normal Status:  None
Privacy:  Public Assigned to:  None
Originator Name:  Open/Closed:  Open
Release:  1.13.4 Operating System:  GNU/Linux
Reproducibility:  Every Time Fixed Release:  None
Planned Release:  None Regression:  Yes
Work Required:  None Patch Included:  Yes

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Sat 05 Sep 2015 08:36:42 AM UTC, comment #2:

Thanks for the info.

http://somehost.dreamwidth.org/ doesn't work for testing.
Same with http://frobozz.seltzer.edu/

If you don't want to post a real URL in public, either
- set up a test case
- send the URL to me privately
to help us reproducing and fixing the issue.

Tim Ruehsen <rockdaboot>
Project Administrator
Sat 05 Sep 2015 12:42:23 AM UTC, comment #1:

There may be a related problem: if the URL has the form

http://frobozz.seltzer.edu/archives/frobozz.seltzer.edu/....more stuff...

It will not recurse. I've done basic tests in both Windows and Linux.

Fri 28 Dec 2012 07:26:46 AM UTC, original submission:

If a redirect ends up ultimately redirecting to the same url, recursion aborts because that url is already in the blacklist. This causes --page-requisites to fail to download any resources from that page (and likely would cause general --recursion to fail as well).

For example, most Dreamwidth pages do this sort of redirection if you're logged in, where they bounce to one page, and then back to the original. I was using the following command (with a logged in cookie jar in cookie.txt):

wget --no-clobber -e robots=off --force-directories --no-check-certificate --ignore-tags=a --debug --wait 2 --adjust-extension --page-requisites --span-hosts --backup-converted --convert-links --load-cookies cookie.txt http://somehost.dreamwidth.org/profile/

...which yields a log that looks something like this:

Enqueuing http://somehost.dreamwidth.org/profile/ at depth 0
Dequeuing http://somehost.dreamwidth.org/profile/ at depth 0

[...redirects, etc...]

Deciding whether to enqueue "http://somehost.dreamwidth.org/profile/".
Already on the black list.
Decided NOT to load it.
Redirection "http://somehost.dreamwidth.org/profile/" failed the test.
FINISHED --2012-12-27 21:26:46--

This redirection to the same blacklisted url causes descend_redirect_p to return false and print the "failed the test" line above. It seems like the best way to handle this would be to not consider it a redirect.

Patch attached that fixes the problem locally for me in 1.13.4. This used to work in past versions of wget (most likely 1.12.1 shipped with ubuntu 10.04), but I haven't narrowed down which version had the regression.

Enne Walker <enne>


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  • -email is unavailable- added by rockdaboot (Posted a comment)
  • -email is unavailable- added by enne (Submitted the item)



    Follows 1 latest change.

    Date Changed by Updated Field Previous Value => Replaced by
    2012-12-28 enne Attached File- => Added wget-redirected_to_same_host.patch, #27156

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