raise Unicorn::ClientShutdown if client aborts in TeeInput

Leaving the EOFError exception as-is bad because most
applications/frameworks run an application-wide exception
handler to pretty-print and/or log the exception with a huge
backtrace.

Since there's absolutely nothing we can do in the server-side
app to deal with clients prematurely shutting down, having a
backtrace does not make sense.  Having a backtrace can even be
harmful since it creates unnecessary noise for application
engineers monitoring or tracking down real bugs.

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/unicorn.rb b/lib/unicorn.rb
index a696402..c6c311e 100644
--- a/lib/unicorn.rb
+++ b/lib/unicorn.rb
@@ -8,6 +8,12 @@ autoload :Rack, 'rack'
 # a Unicorn web server.  It contains a minimalist HTTP server with just enough
 # functionality to service web application requests fast as possible.
 module Unicorn
+
+  # raise this inside TeeInput when a client disconnects inside the
+  # application dispatch
+  class ClientShutdown < EOFError
+  end
+
   autoload :Const, 'unicorn/const'
   autoload :HttpRequest, 'unicorn/http_request'
   autoload :HttpResponse, 'unicorn/http_response'