Howto write a mongrel handler for a CGI app using CGIWrapper

Server Mongrel
1

Hello,

Just for further reference in case of someone else want to do the same :

I wanted to write a mongrel for a CGI app :
[[[
require ‘cgi’
require ‘foo’

cgi = CGI.new

if !cgi[‘uri’] || (cgi[‘uri’] == ‘’)
Foo.error “URI argument is required”
end

uri = cgi[‘uri’]
user = cgi[‘username’]
pass = cgi[‘password’]

foo = Foo.new(:output => ‘html’)

if user == ‘’
foo.check(uri)
else
foo.check(uri, user, pass)
end
foo.report
]]]

Here is the mongrel version, using Mongrel::CGIWrapper :
[[[
require ‘mongrel’
require ‘cgi’
require ‘foo’

class AppHandler < Mongrel::HttpHandler
def process(request, response)
cgi = Mongrel::CGIWrapper.new(request, response)

if !cgi['uri'] || (cgi['uri'] == '')
  response.start(200, true) do |header, body|

    Foo.error("URI argument is required", output=body)
  end
end

format = request.params['HTTP_ACCEPT'] == 'text/plain' ? 'text' :

‘html’
ape = Ape.new({ :crumbs => true, :output => format })

if cgi['user'] && cgi['pass']
  ape.check(cgi['uri'], cgi['user'], cgi['pass'])
else
  ape.check(cgi['uri'])
end

response.start(200, true) do |head, body|
  ape.report(output=body)
end

end
end

h = Mongrel::HttpServer.new(‘0.0.0.0’, 4000)
h.register(’/’, Mongrel::RedirectHandler.new(’/ape/index.html’))
h.register(’/ape’, Mongrel::DirHandler.new(File.dirname(FILE) +
‘/layout’, true))
h.register(’/atompub/go’, ApeHandler.new)
h.run.join
]]]

2

On 1/4/08, Simon R. [email protected] wrote:

Hello,

Just for further reference in case of someone else want to do the same :

Err, sorry. I unwittingly hit … so here is the
correct message :

end
foo.report
]]]

Here is the mongrel version, using Mongrel::CGIWrapper :
[[[
require ‘mongrel’
require ‘cgi’
require ‘foo’

class FooHandler < Mongrel::HttpHandler
def process(request, response)
cgi = Mongrel::CGIWrapper.new(request, response)

if !cgi[‘uri’] || (cgi[‘uri’] == ‘’)
response.start(200, true) do |header, body|
# Foo.error accept an IO object to write to
Foo.error(“URI argument is required”, output=body)
end
end

format = request.params[‘HTTP_ACCEPT’] == ‘text/plain’ ? ‘text’ :
‘html’
ape = Foo.new(:output => format)

if cgi[‘user’] && cgi[‘pass’]
Foo.check(cgi[‘uri’], cgi[‘user’], cgi[‘pass’])
else
Foo.check(cgi[‘uri’])
end

response.start(200, true) do |head, body|
Foo.report(output=body)
end
end
end

h = Mongrel::HttpServer.new(‘0.0.0.0’, 5000)
h.register(‘/foo’, FooHandler.new)
h.run.join
]]]

That’s it. Now I can launch the app from the command line without the
pain of any server configuration. Thanks to Evan for pointing me to
the right direction btw