Use apertium locally for translations

src/cgi-bin/translate

@@ -1,10 +1,7 @@
-#!/usr/bin/env ruby
+#!/usr/bin/ruby --disable-all
 
-# A cgi-bin script that translates between languages, scraping apertium's API
-# to do so
-#
-# It's kind of bad manners; I'll transition it to the offline tools once I've
-# worked those out.
+# A cgi-bin script that translates between languages. It relies on apertium
+# being installed on the machine.
 #
 # CGI works with environment variables. Here are the ones that matter:
 #
@@ -18,6 +15,8 @@
 
 require 'cgi'
 
+LANGUAGE_PAIRS = %w[en-es es-en]
+
 class Object
   def blank?
     nil? || self&.empty?
@@ -46,15 +45,17 @@ def not_found!(meta = 'Not Found')
   respond!(51, meta)
 end
 
-def extract_languages(path)
+def extract_langpair(path)
   return if path.blank? || !path.start_with?('/')
 
   _, src, dst, *rest = path.split('/')
 
   return unless rest.empty?
-  # return unless LANGUAGES.include?(src) && LANGUAGES.include?(dst)
 
-  [src, dst]
+  pair = [src, dst].join('-')
+  return unless LANGUAGE_PAIRS.include?(pair)
+
+  pair
 end
 
 def extract_text(query)
@@ -63,29 +64,19 @@ def extract_text(query)
   CGI.unescape(query)
 end
 
-SRC_LANG, DST_LANG = extract_languages(ENV['PATH_INFO'])
-not_found! if SRC_LANG.blank? || DST_LANG.blank?
+LANG_PAIR = extract_langpair(ENV['PATH_INFO'])
+not_found! if LANG_PAIR.blank?
 
 TRANSLATE = extract_text(ENV['QUERY_STRING'])
 
 # TODO: we could detect a URL and translate the whole page sometime, perhaps
 ask!('Enter text to translate') if TRANSLATE.blank?
 
-require 'net/http'
-require 'json'
+require 'open3'
 
-uri = URI.parse('https://www.apertium.org/apy/translate')
-uri.query = URI.encode_www_form(q: TRANSLATE, langpair: [SRC_LANG, DST_LANG].join('|'))
+translation, status = Open3.capture2("apertium", LANG_PAIR, stdin_data: TRANSLATE)
 
-rsp = Net::HTTP.get(uri)
-temp_fail!("Couldn't get translation (1)") unless rsp
+temp_fail!("Couldn't get translation") unless status.success?
 
-begin
-  structure = JSON.parse(rsp)
-rescue
-  temp_fail!("Couldn't get translation (2)")
-end
+ok!('text/plain; charset="utf-8"', translation)
 
-temp_fail!("Couldn't get transaltion (3)") unless structure['responseStatus'] == 200
-
-ok!('text/plain', structure.dig('responseData', 'translatedText'))

src/index.gmi

@@ -9,7 +9,7 @@
 
 ## Translation service
 
-=> /cgi-bin/translate/eng/spa English -> Español
-=> /cgi-bin/translate/spa/eng Español -> English
+=> /cgi-bin/translate/en/es English -> Español
+=> /cgi-bin/translate/es/en Español -> English
 
 ## About Me