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-rw-r--r--lib/unicorn/http_response.rb6
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/unicorn/http_response.rb b/lib/unicorn/http_response.rb
index b781e20..61563cd 100644
--- a/lib/unicorn/http_response.rb
+++ b/lib/unicorn/http_response.rb
@@ -18,11 +18,13 @@ module Unicorn::HttpResponse
   CRLF = "\r\n"
 
   # writes the rack_response to socket as an HTTP response
-  def http_response_write(socket, status, headers, body)
+  def http_response_write(socket, status, headers, body,
+                          response_start_sent=false)
     status = CODES[status.to_i] || status
 
+    http_response_start = response_start_sent ? '' : 'HTTP/1.1 '
     if headers
-      buf = "HTTP/1.1 #{status}\r\n" \
+      buf = "#{http_response_start}#{status}\r\n" \
             "Date: #{httpdate}\r\n" \
             "Status: #{status}\r\n" \
             "Connection: close\r\n"