57 lines
1.7 KiB
Ruby
57 lines
1.7 KiB
Ruby
require 'uri'
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module Rack
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# Rack::ForwardRequest gets caught by Rack::Recursive and redirects
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# the current request to the app at +url+.
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#
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# raise ForwardRequest.new("/not-found")
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#
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class ForwardRequest < Exception
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attr_reader :url, :env
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def initialize(url, env={})
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@url = URI(url)
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@env = env
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@env["PATH_INFO"] = @url.path
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@env["QUERY_STRING"] = @url.query if @url.query
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@env["HTTP_HOST"] = @url.host if @url.host
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@env["HTTP_PORT"] = @url.port if @url.port
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@env["rack.url_scheme"] = @url.scheme if @url.scheme
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super "forwarding to #{url}"
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end
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end
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# Rack::Recursive allows applications called down the chain to
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# include data from other applications (by using
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# <tt>rack['rack.recursive.include'][...]</tt> or raise a
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# ForwardRequest to redirect internally.
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class Recursive
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def initialize(app)
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@app = app
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end
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def call(env)
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@script_name = env["SCRIPT_NAME"]
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@app.call(env.merge('rack.recursive.include' => method(:include)))
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rescue ForwardRequest => req
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call(env.merge(req.env))
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end
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def include(env, path)
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unless path.index(@script_name) == 0 && (path[@script_name.size] == ?/ ||
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path[@script_name.size].nil?)
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raise ArgumentError, "can only include below #{@script_name}, not #{path}"
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end
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env = env.merge("PATH_INFO" => path, "SCRIPT_NAME" => @script_name,
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"REQUEST_METHOD" => "GET",
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"CONTENT_LENGTH" => "0", "CONTENT_TYPE" => "",
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"rack.input" => StringIO.new(""))
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@app.call(env)
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end
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end
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end
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