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Re: [tor-bugs] #25676 [Core Tor/Tor]: When a client asks for a gzip-encoded consensus, the server sends zlib

#25676: When a client asks for a gzip-encoded consensus, the server sends zlib
--------------------------------------+----------------------------------
 Reporter:  teor                      |          Owner:  (none)
     Type:  defect                    |         Status:  new
 Priority:  Medium                    |      Milestone:  Tor: unspecified
Component:  Core Tor/Tor              |        Version:  Tor: 0.3.2.10
 Severity:  Normal                    |     Resolution:
 Keywords:  tor-compression, tor-dir  |  Actual Points:
Parent ID:                            |         Points:  0.5
 Reviewer:                            |        Sponsor:
--------------------------------------+----------------------------------

Old description:

> {{{
> $ curl -s -O --header "Accept-Encoding: gzip" 91.121.230.208:9030/tor
> /status-vote/current/consensus && file consensus
> Accept-Encoding: gzip
> Requested: status-vote/current/consensus
> basename $doc
> consensus: zlib compressed data
> }}}
>
> But when the client asks for gzip-encoded descriptors, the server sends
> gzip:
> {{{
> Accept-Encoding: gzip
> Requested: server/authority
> basename $doc
> authority: gzip compressed data, max compression, from Unix
> }}}
>
> See https://trac.torproject.org/projects/tor/ticket/25667#comment:11 for
> a full list of requested encodings, documents, and served formats.
>
> I think this is a minor bug with no impact, because tor clients will
> decompress the zlib anyway. (I don't know if tor clients ever ask for
> gzip without zlib.)
>
> But I'd like someone who knows the compression code better to confirm.

New description:

 {{{
 $ curl -s -O --header "Accept-Encoding: gzip" 91.121.230.208:9030/tor
 /status-vote/current/consensus && file consensus
 Accept-Encoding: gzip
 Requested: status-vote/current/consensus
 consensus: zlib compressed data
 }}}

 But when the client asks for gzip-encoded descriptors, the server sends
 gzip:
 {{{
 Accept-Encoding: gzip
 Requested: server/authority
 authority: gzip compressed data, max compression, from Unix
 }}}

 See https://trac.torproject.org/projects/tor/ticket/25667#comment:11 for a
 full list of requested encodings, documents, and served formats.

 I think this is a minor bug with no impact, because tor clients will
 decompress the zlib anyway. (I don't know if tor clients ever ask for gzip
 without zlib.)

 But I'd like someone who knows the compression code better to confirm.

--

Comment (by teor):

 Edit description: remove extra output lines

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/25676#comment:1>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online

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