From 89450a80fc54d94b6a6ccada3aaf36db79b3a5d4 Mon Sep 17 00:00:00 2001
From: normal <normal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 28 Mar 2018 08:06:28 +0000
Subject: [PATCH] webrick/httpservlet/cgihandler: reduce memory use

WEBrick::HTTPRequest#body can be passed a block to process the
body in chunks.  Use this feature to avoid building a giant
string in memory.

* lib/webrick/httpservlet/cgihandler.rb (do_GET):
  avoid reading entire request body into memory
  (do_POST is aliased to do_GET, so it handles bodies)

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62961 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 lib/webrick/httpservlet/cgihandler.rb | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/lib/webrick/httpservlet/cgihandler.rb b/lib/webrick/httpservlet/cgihandler.rb
index ba6b0b6032..b1fb471c54 100644
--- a/lib/webrick/httpservlet/cgihandler.rb
+++ b/lib/webrick/httpservlet/cgihandler.rb
@@ -65,9 +65,7 @@ module WEBrick
           cgi_in.write("%8d" % dump.bytesize)
           cgi_in.write(dump)
 
-          if req.body and req.body.bytesize > 0
-            cgi_in.write(req.body)
-          end
+          req.body { |chunk| cgi_in.write(chunk) }
         ensure
           cgi_in.close
           status = $?.exitstatus