From: Jonathan Rudenberg <jonathan@titanous.com>
To: Eric Wong <normalperson@yhbt.net>
Cc: unicorn list <mongrel-unicorn@rubyforge.org>, "wrote:"@dcvr.yhbt.net
Subject: Re: HEAD responses contain body
Date: Thu, 13 Jun 2013 14:42:32 -0400 [thread overview]
Message-ID: <3CDFEE4E-AD32-4C0B-A90A-CEADC003B928@titanous.com> (raw)
In-Reply-To: <20130613182238.GA11842@dcvr.yhbt.net>
On Jun 13, 2013, at 2:22 PM, Eric Wong <normalperson@yhbt.net> wrote:
> Jonathan Rudenberg <jonathan@titanous.com> wrote:
>> RFC 2616 section 9.4[1] states:
>>
>>> The HEAD method is identical to GET except that the server MUST NOT return a message-body in the response.
>>
>> A HEAD request against this simple Rack app running on unicorn-4.6.2:
>>
>> require 'rack'
>>
>
> + use Rack::Head
>
>> run lambda { |env| [200, {}, []] }
>
> The Rack::Head middleware should be used to correctly strip HEAD
> responses of their bodies (frameworks such as Rails/Sinatra should
> already add Rack::Head to the middleware stack for you)
This does not change the result, as the Rack::Head implementation looks like this:
def call(env)
status, headers, body = @app.call(env)
if env["REQUEST_METHOD"] == "HEAD"
body.close if body.respond_to? :close
[status, headers, []]
else
[status, headers, body]
end
end
>> Looks like this on the wire:
>>
>> HEAD / HTTP/1.1
>> User-Agent: curl/7.24.0 (x86_64-apple-darwin12.0) libcurl/7.24.0 OpenSSL/0.9.8x zlib/1.2.5
>> Host: localhost:8080
>> Accept: */*
>>
>> HTTP/1.1 200 OK
>> Date: Thu, 13 Jun 2013 16:04:55 GMT
>> Status: 200 OK
>> Connection: close
>> Transfer-Encoding: chunked
>>
>> 0
>>
>> HTTP/1.1 500 Internal Server Error
>
>> As you can see, not only is there a zero-length chunked encoding body,
>> but for some unknown reason there is a 500 response with no body as
>> well.
>
> Try using "-d" on the command-line to enable debugging to see what the
> error is (and check the logs/stderr output).
Exception `Errno::ENOTCONN' at /Users/titanous/.gem/ruby/1.9.3/gems/unicorn-4.6.2/lib/unicorn/http_server.rb:565 - Socket is not connected
> Also, what RACK_ENV (or -E/--env) are you using? It could be the
> incorrect HEAD response tripping Rack::Lint under development mode.
None, specified, I'm booting unicorn with no configuration or flags specified.
>
>> Please cc any responses directly to me, as I do not subscribe to this list.
>
> Done :>
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next prev parent reply other threads:[~2013-06-13 19:07 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-13 16:09 HEAD responses contain body Jonathan Rudenberg
2013-06-13 18:22 ` Eric Wong
2013-06-13 18:42 ` Jonathan Rudenberg [this message]
2013-06-13 19:21 ` Eric Wong
2013-06-13 19:28 ` Jonathan Rudenberg
2013-06-13 19:34 ` Jonathan Rudenberg
2013-06-13 19:45 ` Eric Wong
2013-06-13 19:54 ` Jonathan Rudenberg
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