[tor-bugs] #6858 [Ooni]: HTTP Protocol Helper

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#6858: HTTP Protocol Helper
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 Reporter:  isis                           |          Owner:  hellais
     Type:  task                           |         Status:  new    
 Priority:  normal                         |      Milestone:         
Component:  Ooni                           |        Version:         
 Keywords:  helpers, protocol, ooni-probe  |         Parent:  #6857  
   Points:                                 |   Actualpoints:         
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Comment(by isis):

 The HTTP helper, /ooni/protocols/http.py, tries to do "from
 twisted.web.client import RedirectAgent" without checking Twisted's
 version or the client OS version. In Debian stable, the latest version of
 Twisted in 10.1.0, in which the RedirectAgent class does not exist. Also,
 because the HTTP helper tries to do imports without knowing if they will
 be used or not, this prevents ooniprobe.py from running entirely.

 If we are planning for Twisted-12.x, we should include some sort of
 install script which gets and builds it for us.

 Either way, we should always do smart checking on imports to avoid
 breaking without explaining to the user what is going on, and we should
 avoid importing uneccessary modules.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/6858#comment:1>
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