[tor-bugs] #14453 [BridgeDB]: Implement statistics gathering for number of Bridges-per-Transport in BridgeDB

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#14453: Implement statistics gathering for number of Bridges-per-Transport in
BridgeDB
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     Reporter:  isis      |      Owner:  isis
         Type:  task      |     Status:  new
     Priority:  normal    |  Milestone:
    Component:  BridgeDB  |    Version:
   Resolution:            |   Keywords:  tor-bridge,bridgedb,SponsorS-pt
Actual Points:            |  Parent ID:
       Points:            |
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Comment (by karsten):

 I'm not clear whether we need statistics on the number of available
 bridges by transport, or on the number of requests to BridgeDB by
 transport.  The former is a task for Metrics, the latter requires
 specifying a data format for BridgeDB statistics which CollecTor can fetch
 and then it requires writing code for CollecTor and then Metrics.  I hope
 we didn't promise the latter.

 Assuming we want number of bridges by transport, would you want to write
 the (Python) code for Metrics?  Here's how this code could work:
  - fetch the latest sanitized bridge descriptors from
 https://collector.torproject.org/recent/bridge-descriptors/extra-infos/,
  - parse them, possibly using Stem, and extract the stats we want,
  - add those new numbers to previously produced stats, which may be stored
 in a local file or database, and
  - write a .csv file with all daily means to disk.

 I would run that script in a cronjob on yatei, and I'd write the necessary
 HTML and R/ggplot2 to turn the .csv into a shiny graph on Metrics.

 Does that make sense?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/14453#comment:1>
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