[tor-bugs] #22594 [Metrics/Onionoo]: Escape characters in contact lines break hourly updater

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#22594: Escape characters in contact lines break hourly updater
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 Reporter:  karsten          |          Owner:  iwakeh
     Type:  defect           |         Status:  accepted
 Priority:  High             |      Milestone:
Component:  Metrics/Onionoo  |        Version:
 Severity:  Normal           |     Resolution:
 Keywords:  metrics-2018     |  Actual Points:
Parent ID:                   |         Points:
 Reviewer:                   |        Sponsor:
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Changes (by iwakeh):

 * status:  needs_revision => accepted


Comment:

 Replying to [comment:14 karsten]:
 > Looks good! Two things:
 >  - Can you add a change log entry? Maybe something like this: ''Don't
 attempt to un-escape character sequences in contact lines (like "\uk")
 that only happen to start like escaped utf-8 characters (like "\u0055").''

 Yep, that was missing.

 >  - There's similar code where we replace `"\\\\u"` with `"\\u"` in
 `ResponseBuilder`. Does it make sense to use the new method there, too?

 Sure.  I was actually intending to add a new ticket about having all
 un/escape logic as well as the json-reading and writing in one place,
 which would make it easier to switch to some other JSON lib than gson in
 future and have the logic separate for re-processing files etc.
 But, it's fine to start with putting all un/escape logic in one place and
 add the remaining to a new ticket in case it would be too much for one
 ticket.

 >
 > Thanks!

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22594#comment:15>
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