Ancient HTTP clients which predate HTTP/1.0 may not set HTTP_VERSION
at all, and those do not support chunking.
RFC 1945 describes HTTP/0.9 as well as HTTP/1.0
---
The following changes since commit df1506b0825a096514fcb3821563bf9e8fd52743:
Merge pull request #617 from tmm1/builder-warmup (2013-10-25 21:10:40 -0700)
are available in the git repository at:
git://bogomips.org/rack.git ancient-chunked
for you to fetch changes up to fd3b5312625f06baeda726ef4b32e7a3ac336698:
chunked: do not chunk on pre-HTTP/1.0 clients (2013-11-12 20:58:46 +0000)
lib/rack/chunked.rb | 13 ++++++++++++-
test/spec_chunked.rb | 16 ++++++++++++++++
2 files changed, 28 insertions(+), 1 deletion(-)
Yes, I'm a caveman!
diff --git a/lib/rack/chunked.rb b/lib/rack/chunked.rb
index a400756..ea221fa 100644
--- a/lib/rack/chunked.rb
+++ b/lib/rack/chunked.rb
@@ -39,11 +39,22 @@ module Rack
@app = app
end
+ # pre-HTTP/1.0 (informally "HTTP/0.9") HTTP requests did not have
+ # a version (nor response headers)
+ def chunkable_version?(ver)
+ case ver
+ when "HTTP/1.0", nil, "HTTP/0.9"
+ false
+ else
+ true
+ end
+ end
+
def call(env)
status, headers, body = @app.call(env)
headers = HeaderHash.new(headers)
- if env['HTTP_VERSION'] == 'HTTP/1.0' ||
+ if ! chunkable_version?(env['HTTP_VERSION']) ||
STATUS_WITH_NO_ENTITY_BODY.include?(status) ||
headers['Content-Length'] ||
headers['Transfer-Encoding']
diff --git a/test/spec_chunked.rb b/test/spec_chunked.rb
index 12f2158..0a6d9ff 100644
--- a/test/spec_chunked.rb
+++ b/test/spec_chunked.rb
@@ -64,6 +64,22 @@ describe Rack::Chunked do
body.join.should.equal 'Hello World!'
end
+ should 'not modify response when client is ancient, pre-HTTP/1.0' do
+ app = lambda { |env| [200, {"Content-Type" => "text/plain"}, ['Hello', ' ', 'World!']] }
+ check = lambda do
+ status, headers, body = chunked(app).call(@env.dup)
+ status.should.equal 200
+ headers.should.not.include 'Transfer-Encoding'
+ body.join.should.equal 'Hello World!'
+ end
+
+ @env.delete('HTTP_VERSION') # unicorn will do this on pre-HTTP/1.0 requests
+ check.call
+
+ @env['HTTP_VERSION'] = 'HTTP/0.9' # not sure if this happens in practice
+ check.call
+ end
+
should 'not modify response when Transfer-Encoding header already present' do
app = lambda { |env|
[200, {"Content-Type" => "text/plain", 'Transfer-Encoding' => 'identity'}, ['Hello', ' ', 'World!']]
--
EW
--
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