88 lines
1.9 KiB
Ruby
Executable File
88 lines
1.9 KiB
Ruby
Executable File
#!/usr/bin/ruby --disable-all
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# A cgi-bin script that translates between languages. It relies on apertium
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# being installed on the machine.
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#
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# CGI works with environment variables. Here are the ones that matter:
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#
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# PATH_INFO: /<from>/<to>
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# QUERY_STRING: Some%20text%20to%20translate
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#
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# We expect to be called like: /cgi-bin/translate/eng/spa?Food
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#
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# If we don't have two languages, make it a Not Found error.
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# If we don't have a query string to translate, ask for one.
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require 'cgi'
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LANGUAGE_PAIRS = %w[en-es es-en]
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Encoding.default_internal = Encoding::UTF_8
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Encoding.default_external = Encoding::UTF_8
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class Object
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def blank?
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nil? || self&.empty?
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end
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end
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def respond!(code, meta, body = nil)
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STDOUT.print("#{code} #{meta}\r\n")
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STDOUT.print(body) unless body.blank?
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exit 0
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end
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def ask!(prompt)
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respond!(10, prompt)
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end
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def ok!(meta, body = nil)
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respond!(20, meta, body)
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end
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def temp_fail!(meta = 'Temporary Failure')
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respond!(40, meta)
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end
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def not_found!(meta = 'Not Found')
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respond!(51, meta)
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end
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def extract_langpair(path)
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return if path.blank? || !path.start_with?('/')
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_, src, dst, *rest = path.split('/')
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return unless rest.empty?
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pair = [src, dst].join('-')
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return unless LANGUAGE_PAIRS.include?(pair)
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pair
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end
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def extract_text(query)
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return "" if query.blank?
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CGI.unescape(query)
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end
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LANG_PAIR = extract_langpair(ENV['PATH_INFO'])
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not_found! if LANG_PAIR.blank?
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TRANSLATE = extract_text(ENV['QUERY_STRING'])
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# TODO: we could detect a URL and translate the whole page sometime, perhaps
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ask!('Enter text to translate') if TRANSLATE.blank?
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require 'open3'
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translation, status = Open3.capture2({'LC_ALL' => 'C.UTF-8'}, 'apertium', '-un', LANG_PAIR, stdin_data: TRANSLATE, binmode: true)
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translation = translation.force_encoding("UTF-8")
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temp_fail!("Couldn't get translation") unless status.success?
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ok!('text/plain; charset="utf-8"', translation)
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