Checking that the FCGI::Stream class exists, before trying to override the read method. The FCGI::Stream class does not exist in the pure ruby version of the FCGI module. FCGI will use pure ruby if:

1. FCGI_PURE_RUBY = true
2. The C version of FCGI doesn't load (lib not found or the like)

Signed-off-by: Christian Neukirchen <chneukirchen@gmail.com>

1 files changed, 8 insertions, 6 deletions

diff --git a/lib/rack/handler/fastcgi.rb b/lib/rack/handler/fastcgi.rb
index 11e1fcaa..1739d659 100644
--- a/lib/rack/handler/fastcgi.rb
+++ b/lib/rack/handler/fastcgi.rb
@@ -3,13 +3,15 @@ require 'socket'
 require 'rack/content_length'
 require 'rack/rewindable_input'
 
-class FCGI::Stream
-  alias _rack_read_without_buffer read
+if defined? FCGI::Stream
+  class FCGI::Stream
+    alias _rack_read_without_buffer read
 
-  def read(n, buffer=nil)
-    buf = _rack_read_without_buffer n
-    buffer.replace(buf.to_s)  if buffer
-    buf
+    def read(n, buffer=nil)
+      buf = _rack_read_without_buffer n
+      buffer.replace(buf.to_s)  if buffer
+      buf
+    end
   end
 end