Missing SERVER_NAME if Host header is missing

#87

Rack::Lint complains about missing requried env key SERVER_NAME when the host field is left out.

The host header is required in HTTP 1.1, but not in HTTP 1.0. According to the Rack spec http://rack.rubyforge.org/doc/files/SPEC.html the SERVER_NAME key is required, but I am not sure what it should be if no hostname is specified in the HTTP request.

The error message is:

!! Unexpected error while processing request: env missing required key SERVER_NAME

Steps to reproduce.

Use the Rack application below.

# hello_world.ru
app = proc do |env|
  [200, {'Content-Type' => 'text/plain'}, ["Hello World!\n"]]
end

use Rack::Lint

run app

thin start -R hello_world.ru

I personally use netcat to send my HTTP requests but if you do not have it installed telnet works just fine, if a bit more tedious.

echo -e -n 'GET / HTTP/1.0\r\n\r\n' | netcat localhost 3000

This is request does not give any errors:

echo -e -n 'GET / HTTP/1.0\r\nHost: localhost\r\n\r\n' | netcat localhost 3000

Reported by Andreas Karlsson · November 9th, 2008 @ 02:08 PM

Activity

macournoyer
- Milestone changed from Future to 1.1
- State changed from new to open
defaulting to localhost sounds like the most obvious thing to do.

thx for reporting Andreas!

November 10th, 2008 @ 09:16 AM
macournoyer
- State changed from open to resolved
(from [7c8e416848e2dfc8f1fb594997be640cf8f398b2]) Defaults SERVER_NAME to localhost like webrick does [#87 Missing SERVER_NAME if Host header is missing state:resolved] http://github.com/macournoyer/th...

December 16th, 2008 @ 09:06 PM
macournoyer
(from [af9b7d0b755a4622a73b4e461a06934d0b9449d7]) Merge branch 'master' of git://github.com/macournoyer/thin into async_for_rack
- 'master' of git://github.com/macournoyer/thin: Add hostingrails to users page changelog entry for last patch thin.c#http_field : omit parsing #defined string Defaults SERVER_NAME to localhost like webrick does [#87 Missing SERVER_NAME if Host header is missing state:resolved] Add changelog entry for last merge Fix spec failing cause of newer version of Ragel skiping some useless chars when parsing. dont need to namespace macros regen parser with namespaced functions just making sure to namespace the parser requiring mongrel breaks the tests namepsacing namespacing ragel stuff Add gemspec file for github No need for COMMITTERS file anymore Update site users page http://github.com/macournoyer/th...
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