[tor-bugs] #12120 [meek]: Enable Firefox meek-http-helper to use an upstream proxy

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#12120: Enable Firefox meek-http-helper to use an upstream proxy
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     Reporter:  dcf          |      Owner:  dcf
         Type:  enhancement  |     Status:  needs_review
     Priority:  normal       |  Milestone:
    Component:  meek         |    Version:
   Resolution:               |   Keywords:
Actual Points:               |  Parent ID:
       Points:               |
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Changes (by dcf):

 * status:  new => needs_review


Comment:

 I have a branch implementing
 #8402/[https://gitweb.torproject.org/torspec.git/blob/23b94e24f3089ba1a4bcafcc5c92c3753df0f17d:/proposals/232
 -pluggable-transports-through-proxy.txt proposal 232] in meek-client.
  * https://gitweb.torproject.org/pluggable-
 transports/meek.git/shortlog/refs/heads/proxy
 When run with the browser extension helper (--helper option), all the
 proxy types are supported: http, socks5, and socks4a. When run without the
 helper, only http is supported.

 Here's a cumulative diff of all changes as of the posting of this comment:
  * https://gitweb.torproject.org/pluggable-
 transports/meek.git/commitdiff/0df40fee0a2822001797b2500fc6869ea2944383?hp=38e6ebed87aa4a8281c1f2d6ad931a2d911797ec

 The code in the Firefox browser extension is pretty simple. We just add a
 new `proxy` key to the JSON blob passed to the extension, and set up the
 right kind of [https://developer.mozilla.org/en-
 US/docs/XPCOM_Interface_Reference/nsIProxyInfo nsIProxyInfo].
  * https://gitweb.torproject.org/pluggable-
 transports/meek.git/blob/0df40fee0a2822001797b2500fc6869ea2944383:/firefox/components/main.js#l134
 In meek-client, we add the new JSON `proxy` element when using the helper:
  * https://gitweb.torproject.org/pluggable-
 transports/meek.git/blob/0df40fee0a2822001797b2500fc6869ea2944383:/meek-
 client/helper.go#l35

 See also #12125 for the migration of the TOR_PT_PROXY code to goptlib. It
 would move the code in proxy.go and proxy_test.go.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/12120#comment:2>
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