class URI::Generic

# File lib/uri/generic.rb, line 121
def self.build(args)
  if args.kind_of?(Array) &&
      args.size == ::URI::Generic::COMPONENT.size
    tmp = args.dup
  elsif args.kind_of?(Hash)
    tmp = ::URI::Generic::COMPONENT.collect do |c|
      if args.include?(c)
        args[c]
      else
        nil
      end
    end
  else
    component = self.class.component rescue ::URI::Generic::COMPONENT
    raise ArgumentError,
    "expected Array of or Hash of components of #{self.class} (#{component.join(', ')})"
  end

  tmp << nil
  tmp << true
  return self.new(*tmp)
end

# File lib/uri/generic.rb, line 83
def self.build2(args)
  begin
    return self.build(args)
  rescue InvalidComponentError
    if args.kind_of?(Array)
      return self.build(args.collect{|x|
        if x.is_a?(String)
          DEFAULT_PARSER.escape(x)
        else
          x
        end
      })
    elsif args.kind_of?(Hash)
      tmp = {}
      args.each do |key, value|
        tmp[key] = if value
            DEFAULT_PARSER.escape(value)
          else
            value
          end
      end
      return self.build(tmp)
    end
  end
end

# File lib/uri/generic.rb, line 54
def self.component
  self::COMPONENT
end

# File lib/uri/generic.rb, line 29
def self.default_port
  self::DEFAULT_PORT
end

# File lib/uri/generic.rb, line 173
def initialize(scheme,
               userinfo, host, port, registry,
               path, opaque,
               query,
               fragment,
               parser = DEFAULT_PARSER,
               arg_check = false)
  @scheme = nil
  @user = nil
  @password = nil
  @host = nil
  @port = nil
  @path = nil
  @query = nil
  @opaque = nil
  @registry = nil
  @fragment = nil
  @parser = parser == DEFAULT_PARSER ? nil : parser

  if arg_check
    self.scheme = scheme
    self.userinfo = userinfo
    self.hostname = host
    self.port = port
    self.path = path
    self.query = query
    self.opaque = opaque
    self.registry = registry
    self.fragment = fragment
  else
    self.set_scheme(scheme)
    self.set_userinfo(userinfo)
    self.set_host(host)
    self.set_port(port)
    self.set_path(path)
    self.set_query(query)
    self.set_opaque(opaque)
    self.set_registry(registry)
    self.set_fragment(fragment)
  end
  if @registry && !self.class.use_registry
    raise InvalidURIError,
      "the scheme #{@scheme} does not accept registry part: #{@registry} (or bad hostname?)"
  end

  @scheme.freeze if @scheme
  self.set_path('') if !@path && !@opaque # (see RFC2396 Section 5.2)
  self.set_port(self.default_port) if self.default_port && !@port
end

# File lib/uri/generic.rb, line 67
def self.use_registry
  self::USE_REGISTRY
end

# File lib/uri/generic.rb, line 1498
def ==(oth)
  if self.class == oth.class
    self.normalize.component_ary == oth.normalize.component_ary
  else
    false
  end
end

# File lib/uri/generic.rb, line 1061
def absolute?
  if @scheme
    true
  else
    false
  end
end

# File lib/uri/generic.rb, line 1589
def coerce(oth)
  case oth
  when String
    oth = parser.parse(oth)
  else
    super
  end

  return oth, self
end

# File lib/uri/generic.rb, line 321
def component
  self.class.component
end

# File lib/uri/generic.rb, line 36
def default_port
  self.class.default_port
end

# File lib/uri/generic.rb, line 1510
def eql?(oth)
  self.class == oth.class &&
  parser == oth.parser &&
  self.component_ary.eql?(oth.component_ary)
end

# File lib/uri/generic.rb, line 1613
def find_proxy
  raise BadURIError, "relative URI: #{self}" if self.relative?
  name = self.scheme.downcase + '_proxy'
  proxy_uri = nil
  if name == 'http_proxy' && ENV.include?('REQUEST_METHOD') # CGI?
    # HTTP_PROXY conflicts with *_proxy for proxy settings and
    # HTTP_* for header information in CGI.
    # So it should be careful to use it.
    pairs = ENV.reject {|k, v| /\Ahttp_proxy\z/i !~ k }
    case pairs.length
    when 0 # no proxy setting anyway.
      proxy_uri = nil
    when 1
      k, _ = pairs.shift
      if k == 'http_proxy' && ENV[k.upcase] == nil
        # http_proxy is safe to use because ENV is case sensitive.
        proxy_uri = ENV[name]
      else
        proxy_uri = nil
      end
    else # http_proxy is safe to use because ENV is case sensitive.
      proxy_uri = ENV.to_hash[name]
    end
    if !proxy_uri
      # Use CGI_HTTP_PROXY.  cf. libwww-perl.
      proxy_uri = ENV["CGI_#{name.upcase}"]
    end
  elsif name == 'http_proxy'
    unless proxy_uri = ENV[name]
      if proxy_uri = ENV[name.upcase]
        warn 'The environment variable HTTP_PROXY is discouraged.  Use http_proxy.'
      end
    end
  else
    proxy_uri = ENV[name] || ENV[name.upcase]
  end

  if proxy_uri.nil? || proxy_uri.empty?
    return nil
  end

  if self.hostname
    require 'socket'
    begin
      addr = IPSocket.getaddress(self.hostname)
      return nil if /\A127\.|\A::1\z/ =~ addr
    rescue SocketError
    end
  end

  name = 'no_proxy'
  if no_proxy = ENV[name] || ENV[name.upcase]
    no_proxy.scan(/([^:,]*)(?::(\d+))?/) {|host, port|
      if /(\A|\.)#{Regexp.quote host}\z/i =~ self.host &&
        (!port || self.port == port.to_i)
        return nil
      end
    }
  end
  URI.parse(proxy_uri)
end

# File lib/uri/generic.rb, line 1041
def fragment=(v)
  check_fragment(v)
  set_fragment(v)
  v
end

# File lib/uri/generic.rb, line 1506
def hash
  self.component_ary.hash
end

# File lib/uri/generic.rb, line 1050
def hierarchical?
  if @path
    true
  else
    false
  end
end

# File lib/uri/generic.rb, line 645
def host=(v)
  check_host(v)
  set_host(v)
  v
end

# File lib/uri/generic.rb, line 660
def hostname
  v = self.host
  /\A\[(.*)\]\z/ =~ v ? $1 : v
end

# File lib/uri/generic.rb, line 678
def hostname=(v)
  v = "[#{v}]" if /\A\[.*\]\z/ !~ v && /:/ =~ v
  self.host = v
end

# File lib/uri/generic.rb, line 1566
def inspect
  @@to_s.bind(self).call.sub!(/>\z/) {" URL:#{self}>"}
end

# File lib/uri/generic.rb, line 1199
def merge(oth)
  begin
    base, rel = merge0(oth)
  rescue
    raise $!.class, $!.message
  end

  if base == rel
    return base
  end

  authority = rel.userinfo || rel.host || rel.port

  # RFC2396, Section 5.2, 2)
  if (rel.path.nil? || rel.path.empty?) && !authority && !rel.query
    base.set_fragment(rel.fragment) if rel.fragment
    return base
  end

  base.set_query(nil)
  base.set_fragment(nil)

  # RFC2396, Section 5.2, 4)
  if !authority
    base.set_path(merge_path(base.path, rel.path)) if base.path && rel.path
  else
    # RFC2396, Section 5.2, 4)
    base.set_path(rel.path) if rel.path
  end

  # RFC2396, Section 5.2, 7)
  base.set_userinfo(rel.userinfo) if rel.userinfo
  base.set_host(rel.host)         if rel.host
  base.set_port(rel.port)         if rel.port
  base.set_query(rel.query)       if rel.query
  base.set_fragment(rel.fragment) if rel.fragment

  return base
end

# File lib/uri/generic.rb, line 1171
def merge!(oth)
  t = merge(oth)
  if self == t
    nil
  else
    replace!(t)
    self
  end
end

# File lib/uri/generic.rb, line 1420
def normalize
  uri = dup
  uri.normalize!
  uri
end

# File lib/uri/generic.rb, line 1429
def normalize!
  if path && path == ''
    set_path('/')
  end
  if scheme && scheme != scheme.downcase
    set_scheme(self.scheme.downcase)
  end
  if host && host != host.downcase
    set_host(self.host.downcase)
  end
end

# File lib/uri/generic.rb, line 988
def opaque=(v)
  check_opaque(v)
  set_opaque(v)
  v
end

# File lib/uri/generic.rb, line 298
def parser
  if !defined?(@parser) || !@parser
    DEFAULT_PARSER
  else
    @parser || DEFAULT_PARSER
  end
end

# File lib/uri/generic.rb, line 587
def password
  @password
end

# File lib/uri/generic.rb, line 512
def password=(password)
  check_password(password)
  set_password(password)
  # returns password
end

# File lib/uri/generic.rb, line 870
def path=(v)
  check_path(v)
  set_path(v)
  v
end

# File lib/uri/generic.rb, line 744
def port=(v)
  check_port(v)
  set_port(v)
  port
end

# File lib/uri/generic.rb, line 935
def query=(v)
  check_query(v)
  set_query(v)
  v
end

# File lib/uri/generic.rb, line 797
def registry=(v)
  check_registry(v)
  set_registry(v)
  v
end

# File lib/uri/generic.rb, line 1073
def relative?
  !absolute?
end

# File lib/uri/generic.rb, line 1373
def route_from(oth)
  # you can modify `rel', but can not `oth'.
  begin
    oth, rel = route_from0(oth)
  rescue
    raise $!.class, $!.message
  end
  if oth == rel
    return rel
  end

  rel.set_path(route_from_path(oth.path, self.path))
  if rel.path == './' && self.query
    # "./?foo" -> "?foo"
    rel.set_path('')
  end

  return rel
end

# File lib/uri/generic.rb, line 1413
def route_to(oth)
  parser.send(:convert_to_uri, oth).route_from(self)
end

# File lib/uri/generic.rb, line 370
def scheme=(v)
  check_scheme(v)
  set_scheme(v)
  v
end

# File lib/uri/generic.rb, line 1554
def select(*components)
  components.collect do |c|
    if component.include?(c)
      self.send(c)
    else
      raise ArgumentError,
        "expected of components of #{self.class} (#{self.class.component.join(', ')})"
    end
  end
end

# File lib/uri/generic.rb, line 1454
def to_s
  str = ''
  if @scheme
    str << @scheme
    str << ':'
  end

  if @opaque
    str << @opaque

  else
    if @registry
      str << @registry
    else
      if @host
        str << '//'
      end
      if self.userinfo
        str << self.userinfo
        str << '@'
      end
      if @host
        str << @host
      end
      if @port && @port != self.default_port
        str << ':'
        str << @port.to_s
      end
    end

    str << path_query
  end

  if @fragment
    str << '#'
    str << @fragment
  end

  str
end

# File lib/uri/generic.rb, line 582
def user
  @user
end

# File lib/uri/generic.rb, line 483
def user=(user)
  check_user(user)
  set_user(user)
  # returns user
end

# File lib/uri/generic.rb, line 571
def userinfo
  if @user.nil?
    nil
  elsif @password.nil?
    @user
  else
    @user + ':' + @password
  end
end

# File lib/uri/generic.rb, line 451
def userinfo=(userinfo)
  if userinfo.nil?
    return nil
  end
  check_userinfo(*userinfo)
  set_userinfo(*userinfo)
  # returns userinfo
end

# File lib/uri/generic.rb, line 1530
def component_ary
  component.collect do |x|
    self.send(x)
  end
end

# File lib/uri/generic.rb, line 1013
def set_fragment(v)
  @fragment = v
end

# File lib/uri/generic.rb, line 617
def set_host(v)
  @host = v
end

# File lib/uri/generic.rb, line 970
def set_opaque(v)
  @opaque = v
end

# File lib/uri/generic.rb, line 548
def set_password(v)
  @password = v
  # returns v
end

# File lib/uri/generic.rb, line 842
def set_path(v)
  @path = v
end

# File lib/uri/generic.rb, line 709
def set_port(v)
  unless !v || v.kind_of?(Fixnum)
    if v.empty?
      v = nil
    else
      v = v.to_i
    end
  end
  @port = v
end

# File lib/uri/generic.rb, line 907
def set_query(v)
  @query = v
end

# File lib/uri/generic.rb, line 779
def set_registry(v)
  @registry = v
end

# File lib/uri/generic.rb, line 342
def set_scheme(v)
  @scheme = v ? v.downcase : v
end

# File lib/uri/generic.rb, line 538
def set_user(v)
  set_userinfo(v, @password)
  v
end

# File lib/uri/generic.rb, line 523
def set_userinfo(user, password = nil)
  unless password
    user, password = split_userinfo(user)
  end
  @user     = user
  @password = password if password

  [@user, @password]
end

# File lib/uri/generic.rb, line 997
def check_fragment(v)
  return v unless v

  if v && v != '' && parser.regexp[:FRAGMENT] !~ v
    raise InvalidComponentError,
      "bad component(expected fragment component): #{v}"
  end

  return true
end

# File lib/uri/generic.rb, line 598
def check_host(v)
  return v unless v

  if @registry || @opaque
    raise InvalidURIError,
      "can not set host with registry or opaque"
  elsif parser.regexp[:HOST] !~ v
    raise InvalidComponentError,
      "bad component(expected host component): #{v}"
  end

  return true
end

# File lib/uri/generic.rb, line 948
def check_opaque(v)
  return v unless v

  # raise if both hier and opaque are not nil, because:
  # absoluteURI   = scheme ":" ( hier_part | opaque_part )
  # hier_part     = ( net_path | abs_path ) [ "?" query ]
  if @host || @port || @user || @path  # userinfo = @user + ':' + @password
    raise InvalidURIError,
      "can not set opaque with host, port, userinfo or path"
  elsif v && parser.regexp[:OPAQUE] !~ v
    raise InvalidComponentError,
      "bad component(expected opaque component): #{v}"
  end

  return true
end

# File lib/uri/generic.rb, line 427
def check_password(v, user = @user)
  if @registry || @opaque
    raise InvalidURIError,
      "can not set password with registry or opaque"
  end
  return v unless v

  if !user
    raise InvalidURIError,
      "password component depends user component"
  end

  if parser.regexp[:USERINFO] !~ v
    raise InvalidComponentError,
      "bad component(expected user component): #{v}"
  end

  return true
end

# File lib/uri/generic.rb, line 811
def check_path(v)
  # raise if both hier and opaque are not nil, because:
  # absoluteURI   = scheme ":" ( hier_part | opaque_part )
  # hier_part     = ( net_path | abs_path ) [ "?" query ]
  if v && @opaque
    raise InvalidURIError,
      "path conflicts with opaque"
  end

  # If scheme is ftp, path may be relative.
  # See RFC 1738 section 3.2.2, and RFC 2396.
  if @scheme && @scheme != "ftp"
    if v && v != '' && parser.regexp[:ABS_PATH] !~ v
      raise InvalidComponentError,
        "bad component(expected absolute path component): #{v}"
    end
  else
    if v && v != '' && parser.regexp[:ABS_PATH] !~ v && parser.regexp[:REL_PATH] !~ v
      raise InvalidComponentError,
        "bad component(expected relative path component): #{v}"
    end
  end

  return true
end

# File lib/uri/generic.rb, line 690
def check_port(v)
  return v unless v

  if @registry || @opaque
    raise InvalidURIError,
      "can not set port with registry or opaque"
  elsif !v.kind_of?(Fixnum) && parser.regexp[:PORT] !~ v
    raise InvalidComponentError,
      "bad component(expected port component): #{v}"
  end

  return true
end

# File lib/uri/generic.rb, line 883
def check_query(v)
  return v unless v

  # raise if both hier and opaque are not nil, because:
  # absoluteURI   = scheme ":" ( hier_part | opaque_part )
  # hier_part     = ( net_path | abs_path ) [ "?" query ]
  if @opaque
    raise InvalidURIError,
      "query conflicts with opaque"
  end

  if v && v != '' && parser.regexp[:QUERY] !~ v
      raise InvalidComponentError,
        "bad component(expected query component): #{v}"
  end

  return true
end

# File lib/uri/generic.rb, line 757
def check_registry(v)
  return v unless v

  # raise if both server and registry are not nil, because:
  # authority     = server | reg_name
  # server        = [ [ userinfo "@" ] hostport ]
  if @host || @port || @user # userinfo = @user + ':' + @password
    raise InvalidURIError,
      "can not set registry with host, port, or userinfo"
  elsif v && parser.regexp[:REGISTRY] !~ v
    raise InvalidComponentError,
      "bad component(expected registry component): #{v}"
  end

  return true
end

# File lib/uri/generic.rb, line 328
def check_scheme(v)
  if v && parser.regexp[:SCHEME] !~ v
    raise InvalidComponentError,
      "bad component(expected scheme component): #{v}"
  end

  return true
end

# File lib/uri/generic.rb, line 403
def check_user(v)
  if @registry || @opaque
    raise InvalidURIError,
      "can not set user with registry or opaque"
  end

  return v unless v

  if parser.regexp[:USERINFO] !~ v
    raise InvalidComponentError,
      "bad component(expected userinfo component or user component): #{v}"
  end

  return true
end

# File lib/uri/generic.rb, line 385
def check_userinfo(user, password = nil)
  if !password
    user, password = split_userinfo(user)
  end
  check_user(user)
  check_password(password, user)

  return true
end

# File lib/uri/generic.rb, line 565
def escape_userpass(v)
  v = parser.escape(v, /[@:\/]/o) # RFC 1738 section 3.1 #/
end

# File lib/uri/generic.rb, line 1242
def merge0(oth)
  oth = parser.send(:convert_to_uri, oth)

  if self.relative? && oth.relative?
    raise BadURIError,
      "both URI are relative"
  end

  if self.absolute? && oth.absolute?
    #raise BadURIError,
    #  "both URI are absolute"
    # hmm... should return oth for usability?
    return oth, oth
  end

  if self.absolute?
    return self.dup, oth
  else
    return oth, oth
  end
end

# File lib/uri/generic.rb, line 1089
def merge_path(base, rel)

  # RFC2396, Section 5.2, 5)
  # RFC2396, Section 5.2, 6)
  base_path = split_path(base)
  rel_path  = split_path(rel)

  # RFC2396, Section 5.2, 6), a)
  base_path << '' if base_path.last == '..'
  while i = base_path.index('..')
    base_path.slice!(i - 1, 2)
  end

  if (first = rel_path.first) and first.empty?
    base_path.clear
    rel_path.shift
  end

  # RFC2396, Section 5.2, 6), c)
  # RFC2396, Section 5.2, 6), d)
  rel_path.push('') if rel_path.last == '.' || rel_path.last == '..'
  rel_path.delete('.')

  # RFC2396, Section 5.2, 6), e)
  tmp = []
  rel_path.each do |x|
    if x == '..' &&
        !(tmp.empty? || tmp.last == '..')
      tmp.pop
    else
      tmp << x
    end
  end

  add_trailer_slash = !tmp.empty?
  if base_path.empty?
    base_path = [''] # keep '/' for root directory
  elsif add_trailer_slash
    base_path.pop
  end
  while x = tmp.shift
    if x == '..'
      # RFC2396, Section 4
      # a .. or . in an absolute path has no special meaning
      base_path.pop if base_path.size > 1
    else
      # if x == '..'
      #   valid absolute (but abnormal) path "/../..."
      # else
      #   valid absolute path
      # end
      base_path << x
      tmp.each {|t| base_path << t}
      add_trailer_slash = false
      break
    end
  end
  base_path.push('') if add_trailer_slash

  return base_path.join('/')
end

# File lib/uri/generic.rb, line 1442
def path_query
  str = @path
  if @query
    str += '?' + @query
  end
  str
end

# File lib/uri/generic.rb, line 307
def replace!(oth)
  if self.class != oth.class
    raise ArgumentError, "expected #{self.class} object"
  end

  component.each do |c|
    self.__send__("#{c}=", oth.__send__(c))
  end
end

# File lib/uri/generic.rb, line 1080
def split_path(path)
  path.split(%r{/+}, -1)
end

# File lib/uri/generic.rb, line 556
def split_userinfo(ui)
  return nil, nil unless ui
  user, password = ui.split(/:/, 2)

  return user, password
end