[RFC] proxy_pass: possibly avoid breaking some middlewares

[Eric Wong <e@80x24.org>]

Running this on http://yhbt.net/yahns-public/ for now.  I originally I
forgot to disable one of my throwaway middlewares which was not aware of
Rack hijacking.

From: Eric Wong <e@80x24.org>
Subject: [PATCH] proxy_pass: possibly avoid breaking some middlewares

hijack seems incompatible with many middlewares, so return a
wonky response tuplet just in case...
---
 lib/yahns/proxy_pass.rb | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/yahns/proxy_pass.rb b/lib/yahns/proxy_pass.rb
index e3ba7f0..48a61af 100644
--- a/lib/yahns/proxy_pass.rb
+++ b/lib/yahns/proxy_pass.rb
@@ -235,6 +235,9 @@ class Yahns::ProxyPass # :nodoc:
 
     # finally, prepare to emit the headers
     rr.req_start(c, req << "\r\n".freeze, input, chunked)
+
+    # this probably breaks fewer middlewares than returning whatever else...
+    [ 500, [], [] ]
   rescue => e
     Yahns::Log.exception(env['rack.logger'], 'proxy_pass', e)
     [ 502, [ %w(Content-Length 0), %w(Content-Type text/plain) ], [] ]
-- 
EW