Module: RestCore::Json

Defined in:
lib/rest-core/util/json.rb

Defined Under Namespace

Modules: Json, MultiJson, YajlRuby

Class Method Summary collapse

Class Method Details

.empty_to_null(json) ⇒ Object 



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# File 'lib/rest-core/util/json.rb', line 86

def self.empty_to_null json
  if json.empty?
    'null'
  else
    json
  end
end

.normalize(json) ⇒ Object 



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# File 'lib/rest-core/util/json.rb', line 65

def self.normalize json
  empty_to_null(strip_bom(json))
end

.select_json!(mod, picked = false) ⇒ Object 



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# File 'lib/rest-core/util/json.rb', line 40

def self.select_json! mod, picked=false
  if    Object.const_defined?(:MultiJson)
    mod.send(:extend, MultiJson)
  elsif Object.const_defined?(:Yajl)
    mod.send(:extend, YajlRuby)
  elsif Object.const_defined?(:JSON)
    mod.send(:extend, Json)
  elsif picked
    raise LoadError.new(
      'No JSON library found. Tried: multi_json, yajl-ruby, json.')
  else
    # pick a json gem if available
    %w[multi_json yajl json].each{ |json|
      begin
        require json
        break
      rescue LoadError
      end
    }
    select_json!(mod, true)
  end
end

.strip_bom(json) ⇒ Object 



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# File 'lib/rest-core/util/json.rb', line 69

def self.strip_bom json
  case json.encoding.name
  when 'UTF-8'
    # StackExchange returns the problematic BOM! in UTF-8, so we
    # need to strip it or it would break JSON parsers (i.e.
    # yajl-ruby and json)
    json.sub(/\A\xEF\xBB\xBF/u, '')
  when 'ASCII-8BIT'
    # In case if Content-Type doesn't have a charset for UTF-8,
    # httpclient would set the response to ASCII-8BIT in this
    # case.
    json.sub(/\A\xEF\xBB\xBF/n, '')
  else
    json
  end
end