[tor-bugs] #11577 [Onionoo]: Use Gson to format/parse documents rather than StringBuilder/Scanner

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#11577: Use Gson to format/parse documents rather than StringBuilder/Scanner
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     Reporter:  karsten      |      Owner:  karsten
         Type:  enhancement  |     Status:  needs_review
     Priority:  normal       |  Milestone:
    Component:  Onionoo      |    Version:
   Resolution:               |   Keywords:
Actual Points:               |  Parent ID:
       Points:               |
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Changes (by karsten):

 * status:  new => needs_review


Comment:

 Pushed branch
 [https://gitweb.torproject.org/user/karsten/onionoo.git/shortlog/refs/heads/task-11577
 task-11577 to my public repository] which uses Gson to format the first
 four classes UptimeDocument, ClientsDocument, WeightsDocument, and
 BandwidthDocument.  These changes are relatively easy, because they only
 contain ASCII characters.

 Review much appreciated!

 DetailsDocument and DetailsStatus will be more difficult, because they may
 contain UTF-8 characters in platform lines, contact information, city
 names, and so on.  Previously, we used to escape any non-ASCII character,
 but Gson writes UTF-8 and assumes UTF-8 when reading.  The biggest issue
 here will be transition from existing documents.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/11577#comment:1>
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