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Re: git-http-backend: anonymous read, authenticated write

From
Magnus Therning <magnus@therning.org>
Date
Apr 11, 2013, 06:52 UTC
Message-ID
<CAAExw5t3rk_R1GB9OMVKjPYEMRQg1gNSUGQtEK71m1Ux01N27w@mail.gmail.com>
In-Reply-To
<20130411015613.GA8455@sigill.intra.peff.net>
On Thu, Apr 11, 2013 at 3:56 AM, Jeff King <peff@peff.net> wrote:
Show 19 quoted lines
> On Thu, Apr 11, 2013 at 01:19:19AM +0200, Magnus Therning wrote:
>
>> Nope.  I'm pretty sure this had *nothing* to do with my config.  This
>> is the original config, which doesn't work:
>>
>> $HTTP["url"] =~ "^/git" {
>>     cgi.assign = ( "" => "" )
>>     setenv.add-environment = (
>>         "GIT_PROJECT_ROOT" => "/srv/git",
>>         "GIT_HTTP_EXPORT_ALL" => ""
>>     )
>>     $HTTP["url"] =~ "^/git/.*/git-receive-pack$" {
>>         include "trac-git-auth.conf"
>>     }
>> }
>
> Ah, I think I see what it is.
>
> Did you turn on http.receivepack in the git config to enable pushing?

Nope, of course I didn't :) Instead I did what the man-page tells me will allow full export of a git repo *without* having to fiddle around with the repo's config:

1. set GIT_HTTP_EXPORT_ALL in the environment
2. turn on authentication for *one* location that requires it for
pushing: ^/git/.*/git-receive-pack$
[...]
> If there is no authentication happening for the initial service-request,
> then the default http.receivepack kicks in, which is to turn pushing
> off (because there is no authenticated user).

Yes, but that only becomes clear when looking at the traffic. In fact, the whole design of services is not clearly mentioned in the man-page. I was *very* surprised to see the query strings when I started looking at the access logs.

> The documentation should probably make the use of http.receivepack more
> clear in this situation.

I think that'd be good. The fact that it wasn't until several mails into the thread that anyone thought of the http.receivepack setting also suggests that its use is a bit un-intuitive (even though it probably makes perfect sense and is a good solution).

> So _if_ you fixed it by setting http.receivepack (which I think is the
> simplest thing under Apache, since matching the query string there is
> hard), then you would need a version of git with that fix on the
> client side to actually have git prompt for the password correctly.

Ah, so *that* is the fix that has been mentioned (I haven't bothered reading it myself), or are there in fact two fixes that have been referred to in the thread?

> But your fix under lighttpd is much better, as it asks for the
> credentials up front (which means the client does not go to any work
> creating a packfile just to find out that it does not have access).

Yes, I think it also helps with my particular scenario where new repos will be added from time to time. This way there is no second step, after `git init`, that must be remembered.

Thank you very much for taking the time to help me out with this! I'll also take a look at the patches you sent, as a dumb simpler user I might have something to add, who knows?

/M

-- Magnus Therning OpenPGP: 0xAB4DFBA4 email: magnus@therning.org jabber: magnus@therning.org twitter: magthe http://therning.org/magnus

Previous: Jakub NarębskiNext: Jeff King
Message 20 of 23 in “git-http-backend: anonymous read, authenticated write”
  1. Magnus TherningApr 9, 2013
  2. Jakub NarębskiApr 9, 2013
  3. Magnus TherningApr 10, 2013
  4. Jeff KingApr 9, 2013
  5. Magnus TherningApr 10, 2013
  6. Jeff KingApr 10, 2013
  7. Jakub NarębskiApr 10, 2013
  8. Jeff KingApr 10, 2013
  9. Magnus TherningApr 10, 2013
  10. Jeff KingApr 11, 2013
  11. 0/2 http-backend documentation examplesJeff King, Apr 11, 2013
  12. 1/2 doc/http-backend: clarify "half-auth" repo configurationJeff King, Apr 11, 2013
  13. Magnus TherningApr 11, 2013
  14. 2/2 doc/http-backend: give some lighttpd config examplesJeff King, Apr 11, 2013
  15. Jakub NarębskiApr 11, 2013
  16. Jeff KingApr 11, 2013
  17. Jakub NarębskiApr 11, 2013
  18. 3/2 doc/http-backend: match query-string in apache half-auth exampleJeff King, Apr 13, 2013
  19. Jakub NarębskiApr 13, 2013
  20. Magnus TherningApr 11, 2013
  21. Jeff KingApr 11, 2013
  22. Magnus TherningApr 12, 2013
  23. Jakub NarębskiApr 11, 2013

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