This class implements the JSON parser that is used to parse a JSON string into a Ruby data structure.
Unescape characters in strings.
Creates a new JSON::Pure::Parser instance for the string source.
It will be configured by the opts hash. opts can have the following keys:
max_nesting: The maximum depth of nesting allowed in the parsed data structures. Disable depth checking with :max_nesting => false|nil|0, it defaults to 19.
allow_nan: If set to true, allow NaN, Infinity and -Infinity in defiance of RFC 4627 to be parsed by the Parser. This option defaults to false.
symbolize_names: If set to true, returns symbols for the names (keys) in a JSON object. Otherwise strings are returned, which is also the default.
create_additions: If set to false, the Parser doesn't create additions even if a matchin class and create_id was found. This option defaults to true.
object_class: Defaults to Hash
array_class: Defaults to Array
# File lib/json/pure/parser.rb, line 71 def initialize(source, opts = {}) opts ||= {} if defined?(::Encoding) if source.encoding == ::Encoding::ASCII_8BIT b = source[0, 4].bytes.to_a source = case when b.size >= 4 && b[0] == 0 && b[1] == 0 && b[2] == 0 source.dup.force_encoding(::Encoding::UTF_32BE).encode!(::Encoding::UTF_8) when b.size >= 4 && b[0] == 0 && b[2] == 0 source.dup.force_encoding(::Encoding::UTF_16BE).encode!(::Encoding::UTF_8) when b.size >= 4 && b[1] == 0 && b[2] == 0 && b[3] == 0 source.dup.force_encoding(::Encoding::UTF_32LE).encode!(::Encoding::UTF_8) when b.size >= 4 && b[1] == 0 && b[3] == 0 source.dup.force_encoding(::Encoding::UTF_16LE).encode!(::Encoding::UTF_8) else source.dup end else source = source.encode(::Encoding::UTF_8) end source.force_encoding(::Encoding::ASCII_8BIT) else b = source source = case when b.size >= 4 && b[0] == 0 && b[1] == 0 && b[2] == 0 JSON.iconv('utf-8', 'utf-32be', b) when b.size >= 4 && b[0] == 0 && b[2] == 0 JSON.iconv('utf-8', 'utf-16be', b) when b.size >= 4 && b[1] == 0 && b[2] == 0 && b[3] == 0 JSON.iconv('utf-8', 'utf-32le', b) when b.size >= 4 && b[1] == 0 && b[3] == 0 JSON.iconv('utf-8', 'utf-16le', b) else b end end super source if !opts.key?(:max_nesting) # defaults to 19 @max_nesting = 19 elsif opts[:max_nesting] @max_nesting = opts[:max_nesting] else @max_nesting = 0 end @allow_nan = !!opts[:allow_nan] @symbolize_names = !!opts[:symbolize_names] ca = true ca = opts[:create_additions] if opts.key?(:create_additions) @create_id = ca ? JSON.create_id : nil @object_class = opts[:object_class] || Hash @array_class = opts[:array_class] || Array end
Parses the current JSON string source and returns the complete data structure as a result.
# File lib/json/pure/parser.rb, line 129 def parse reset obj = nil until eos? case when scan(OBJECT_OPEN) obj and raise ParserError, "source '#{peek(20)}' not in JSON!" @current_nesting = 1 obj = parse_object when scan(ARRAY_OPEN) obj and raise ParserError, "source '#{peek(20)}' not in JSON!" @current_nesting = 1 obj = parse_array when skip(IGNORE) ; else raise ParserError, "source '#{peek(20)}' not in JSON!" end end obj or raise ParserError, "source did not contain any JSON!" obj end
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