[tor-bugs] #12677 [FTE]: fteproxy server's response to malformed messages

[Tor Bug Tracker & Wiki]

#12677: fteproxy server's response to malformed messages
-------------------------+------------------------
 Reporter:  kpdyer       |          Owner:  kpdyer
     Type:  enhancement  |         Status:  new
 Priority:  normal       |      Milestone:
Component:  FTE          |        Version:
 Keywords:               |  Actual Points:
Parent ID:               |         Points:
-------------------------+------------------------
 Raised here: https://trac.torproject.org/projects/tor/ticket/12673

 cypherpunks suggests that fteproxy, when using an HTTP regex, should
 tolerate a range of HTTP headers. Specifically, an fteproxy server when
 using HTTP will terminate the connection, if the following is submitted:

 {{{
 GET /<encoded_data> HTTP/1.1\r\n
 Host: tpo.org\r\n
 User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:24.0) Gecko/20100101
 Firefox/24.0\r\n
 Accept:
 text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n
 Accept-Language: en-us,en;q=0.5\r\n
 Accept-Encoding: gzip, deflate\r\n
 Connection: keep-alive\r\n
 \r\n
 }}}

 It turns out that this is a complex issue to solve in general, as one
 solution we could allow custom error handlers in fteproxy that are
 activated under certain cases.

 As a step towards this, we should probably distinguish between the
 following two cases:

 * The server receives a message that is in the language specified by the
 regex, but is malformed.
 * The server receives a message that is NOT in the language specified by
 the regex, and is, by definition, malformed.

 Thoughts?

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/12677>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online