mirror of https://github.com/cmur2/dyndnsd.git
71 lines
2.4 KiB
Ruby
71 lines
2.4 KiB
Ruby
# frozen_string_literal: true
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module Dyndnsd
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module Responder
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class RestStyle
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# @param app [#call]
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def initialize(app)
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@app = app
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end
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# @param env [Hash{String => String}]
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# @return [Array{Integer,Hash{String => String},Array{String}}]
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def call(env)
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@app.call(env).tap do |status_code, headers, body|
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if headers.key?('X-DynDNS-Response')
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return decorate_dyndnsd_response(status_code, headers, body)
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else
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return decorate_other_response(status_code, headers, body)
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end
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end
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end
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private
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# @param status_code [Integer]
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# @param headers [Hash{String => String}]
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# @param body [Array{String}]
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# @return [Array{Integer,Hash{String => String},Array{String}}]
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def decorate_dyndnsd_response(status_code, headers, body)
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if status_code == 200
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[200, {'Content-Type' => 'text/plain'}, [get_success_body(body[0], body[1])]]
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elsif status_code == 422
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error_response_map[headers['X-DynDNS-Response']]
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end
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end
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# @param status_code [Integer]
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# @param headers [Hash{String => String}]
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# @param _body [Array{String}]
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# @return [Array{Integer,Hash{String => String},Array{String}}]
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def decorate_other_response(status_code, headers, _body)
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if status_code == 400
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[status_code, headers, ['Bad Request']]
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elsif status_code == 401
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[status_code, headers, ['Unauthorized']]
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end
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end
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# @param changes [Array{Symbol}]
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# @param myips [Array{String}]
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# @return [String]
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def get_success_body(changes, myips)
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changes.map { |change| change == :good ? "Changed to #{myips.join(' ')}" : "No change needed for #{myips.join(' ')}" }.join("\n")
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end
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# @return [Hash{String => Object}]
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def error_response_map
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{
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# general http errors
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'method_forbidden' => [405, {'Content-Type' => 'text/plain'}, ['Method Not Allowed']],
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'not_found' => [404, {'Content-Type' => 'text/plain'}, ['Not Found']],
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# specific errors
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'hostname_missing' => [422, {'Content-Type' => 'text/plain'}, ['Hostname missing']],
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'hostname_malformed' => [422, {'Content-Type' => 'text/plain'}, ['Hostname malformed']],
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'host_forbidden' => [403, {'Content-Type' => 'text/plain'}, ['Forbidden']]
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}
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end
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end
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end
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end
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