[tor-bugs] #22233 [Core Tor/Tor]: Reconsider behavior on .z URLs with Accept-Encoding header

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#22233: Reconsider behavior on .z URLs  with Accept-Encoding header
-------------------------------------------------+-------------------------
 Reporter:  nickm                                |          Owner:  ahf
     Type:  defect                               |         Status:
                                                 |  needs_revision
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  unspecified
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  034-triage-20180328,                 |  Actual Points:
  034-removed-20180328                           |
Parent ID:                                       |         Points:
 Reviewer:  teor                                 |        Sponsor:
                                                 |  Sponsor4
-------------------------------------------------+-------------------------
Changes (by teor):

 * status:  needs_review => needs_revision
 * reviewer:   => teor


Comment:

 Please split your pull request: it contains two different changes that
 might end up in different releases.

 Here's my review for the ".z" part:

 Directory mirrors on 0.3.0 and earlier rely on ".z" to know when to send
 compressed content. And I don't know if we have tested later versions
 without ".z".

 So we can't stop sending ".z" until:
 * we have tested 0.3.1 and later without ".z", and
 * all relays are 0.3.1 or later (0.2.9 is supported until 2020)
 OR
 * we have tested 0.3.1 and later without ".z", and
 * we make 0.3.3 and later declare a new directory protocol version, and
 * we make tor test for the new protocol version (or 0.3.1 or later) before
 removing ".z"

 We could put the second option into 0.3.6 if it's well-tested. The first
 option would have to wait until 2021 (~0.4.0).

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22233#comment:14>
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