[tor-bugs] #18798 [Metrics/CollecTor]: analysis of descriptor completeness

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#18798: analysis of descriptor completeness
-------------------------------+-----------------------------------
 Reporter:  iwakeh             |          Owner:  iwakeh
     Type:  task               |         Status:  needs_information
 Priority:  Medium             |      Milestone:
Component:  Metrics/CollecTor  |        Version:
 Severity:  Normal             |     Resolution:
 Keywords:  ctip               |  Actual Points:
Parent ID:                     |         Points:
 Reviewer:                     |        Sponsor:
-------------------------------+-----------------------------------

Comment (by iwakeh):

 > {{{
 > curl -v
 http://154.35.32.5/tor/extra/d/352c235cd4134d0d8ff41c1f88c653a450bd4137 >
 /dev/null   # 200 OK
 > curl -v
 http://154.35.32.5/tor/extra/d/0000000000000000000000000000000000000000 >
 /dev/null   # 404 Not found
 > curl -v
 http://154.35.32.5/tor/extra/d/352c235cd4134d0d8ff41c1f88c653a450bd4137+0000000000000000000000000000000000000000
 > /dev/null   # 200 OK
 > }}}
 >
 > So, looks like "404 Not found" means that none of the requested
 descriptor was found.  Maybe the spec agrees, I didn't look.

 Your empirical result coincides with the
 [https://gitweb.torproject.org/torspec.git/tree/dir-spec.txt#n3245 spec]:
 {{{
 6.2. HTTP status codes

   Tor delivers the following status codes.  Some were chosen without much
   thought; other code SHOULD NOT rely on specific status codes yet.

   200 -- the operation completed successfully
       -- the user requested statuses or serverdescs, and none of the ones
 we
          requested were found (0.2.0.4-alpha and earlier).

   304 -- the client specified an if-modified-since time, and none of the
          requested resources have changed since that time.

   400 -- the request is malformed, or
       -- the URL is for a malformed variation of one of the URLs we
 support,
           or
       -- the client tried to post to a non-authority, or
       -- the authority rejected a malformed posted document, or

   404 -- the requested document was not found.
       -- the user requested statuses or serverdescs, and none of the ones
          requested were found (0.2.0.5-alpha and later).

   503 -- we are declining the request in order to save bandwidth
       -- user requested some items that we ordinarily generate or store,
          but we do not have any available.
 }}}

 Is the "none" in the 200 description a typo? Shouldn't it be "at least
 one"? Or am I missing something obvious?

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18798#comment:13>
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