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91 lines
2.6 KiB
Ruby
91 lines
2.6 KiB
Ruby
module Puma::Rack
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# Rack::URLMap takes a hash mapping urls or paths to apps, and
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# dispatches accordingly. Support for HTTP/1.1 host names exists if
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# the URLs start with <tt>http://</tt> or <tt>https://</tt>.
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#
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# URLMap modifies the SCRIPT_NAME and PATH_INFO such that the part
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# relevant for dispatch is in the SCRIPT_NAME, and the rest in the
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# PATH_INFO. This should be taken care of when you need to
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# reconstruct the URL in order to create links.
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#
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# URLMap dispatches in such a way that the longest paths are tried
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# first, since they are most specific.
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class URLMap
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NEGATIVE_INFINITY = -1.0 / 0.0
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INFINITY = 1.0 / 0.0
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def initialize(map = {})
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remap(map)
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end
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def remap(map)
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@mapping = map.map { |location, app|
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if location =~ %r{\Ahttps?://(.*?)(/.*)}
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host, location = $1, $2
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else
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host = nil
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end
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unless location[0] == ?/
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raise ArgumentError, "paths need to start with /"
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end
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location = location.chomp('/')
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match = Regexp.new("^#{Regexp.quote(location).gsub('/', '/+')}(.*)", nil, 'n')
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[host, location, match, app]
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}.sort_by do |(host, location, _, _)|
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[host ? -host.size : INFINITY, -location.size]
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end
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end
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def call(env)
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path = env['PATH_INFO']
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script_name = env['SCRIPT_NAME']
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http_host = env['HTTP_HOST']
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server_name = env['SERVER_NAME']
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server_port = env['SERVER_PORT']
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is_same_server = casecmp?(http_host, server_name) ||
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casecmp?(http_host, "#{server_name}:#{server_port}")
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@mapping.each do |host, location, match, app|
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unless casecmp?(http_host, host) \
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|| casecmp?(server_name, host) \
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|| (!host && is_same_server)
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next
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end
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next unless m = match.match(path.to_s)
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rest = m[1]
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next unless !rest || rest.empty? || rest[0] == ?/
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env['SCRIPT_NAME'] = (script_name + location)
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env['PATH_INFO'] = rest
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return app.call(env)
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end
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[404, {'Content-Type' => "text/plain", "X-Cascade" => "pass"}, ["Not Found: #{path}"]]
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ensure
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env['PATH_INFO'] = path
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env['SCRIPT_NAME'] = script_name
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end
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private
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def casecmp?(v1, v2)
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# if both nil, or they're the same string
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return true if v1 == v2
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# if either are nil... (but they're not the same)
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return false if v1.nil?
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return false if v2.nil?
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# otherwise check they're not case-insensitive the same
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v1.casecmp(v2).zero?
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end
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end
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end
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