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Rackでmultipartをparseするmiddleware

Last updated at Posted at 2020-12-20

Rack::Multipart.parse_multipart env

config.ru

module Middleware
  class MultipartParser
    def initialize(app)
      @app = app
    end

    def call(env)
      if env["CONTENT_TYPE"] =~ /multipart\/form-data/
        params = Rack::Multipart.parse_multipart(env).to_h

        env["multipart_params"] = params
      end

      @app.call(env)
    end
  end
end

use Middleware::MultipartParser
run -> env { [200, {}, [env["multipart_params"].to_s] ] }
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