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Edit File : util.rb \| Size : 6.41 KB
class CGI; module Util; end; extend Util; end module CGI::Util @@accept_charset="UTF-8" unless defined?(@@accept_charset) # URL-encode a string. # url_encoded_string = CGI::escape("'Stop!' said Fred") # # => "%27Stop%21%27+said+Fred" def escape(string) encoding = string.encoding string.b.gsub(/([^ a-zA-Z0-9_.-]+)/) do \|m\| '%' + m.unpack('H2' * m.bytesize).join('%').upcase end.tr(' ', '+').force_encoding(encoding) end # URL-decode a string with encoding(optional). # string = CGI::unescape("%27Stop%21%27+said+Fred") # # => "'Stop!' said Fred" def unescape(string,encoding=@@accept_charset) str=string.tr('+', ' ').b.gsub(/((?:%[0-9a-fA-F]{2})+)/) do \|m\| [m.delete('%')].pack('H') end.force_encoding(encoding) str.valid_encoding? ? str : str.force_encoding(string.encoding) end # The set of special characters and their escaped values TABLE_FOR_ESCAPE_HTML__ = { "'" => ''', '&' => '&', '"' => '"', '<' => '<', '>' => '>', } # Escape special characters in HTML, namely &\"<> # CGI::escapeHTML('Usage: foo "bar" <baz>') # # => "Usage: foo "bar" <baz>" def escapeHTML(string) string.gsub(/['&\"<>]/, TABLE_FOR_ESCAPE_HTML__) end # Unescape a string that has been HTML-escaped # CGI::unescapeHTML("Usage: foo "bar" <baz>") # # => "Usage: foo \"bar\" <baz>" def unescapeHTML(string) return string unless string.include? '&' enc = string.encoding if enc != Encoding::UTF_8 && [Encoding::UTF_16BE, Encoding::UTF_16LE, Encoding::UTF_32BE, Encoding::UTF_32LE].include?(enc) return string.gsub(Regexp.new('&(apos\|amp\|quot\|gt\|lt\|#[0-9]+\|#x[0-9A-Fa-f]+);'.encode(enc))) do case $1.encode(Encoding::US_ASCII) when 'apos' then "'".encode(enc) when 'amp' then '&'.encode(enc) when 'quot' then '"'.encode(enc) when 'gt' then '>'.encode(enc) when 'lt' then '<'.encode(enc) when /\A#0(\d+)\z/ then $1.to_i.chr(enc) when /\A#x([0-9a-f]+)\z/i then $1.hex.chr(enc) end end end asciicompat = Encoding.compatible?(string, "a") string.gsub(/&(apos\|amp\|quot\|gt\|lt\|\#[0-9]+\|\#[xX][0-9A-Fa-f]+);/) do match = $1.dup case match when 'apos' then "'" when 'amp' then '&' when 'quot' then '"' when 'gt' then '>' when 'lt' then '<' when /\A#0(\d+)\z/ n = $1.to_i if enc == Encoding::UTF_8 or enc == Encoding::ISO_8859_1 && n < 256 or asciicompat && n < 128 n.chr(enc) else "&##{$1};" end when /\A#x([0-9a-f]+)\z/i n = $1.hex if enc == Encoding::UTF_8 or enc == Encoding::ISO_8859_1 && n < 256 or asciicompat && n < 128 n.chr(enc) else "&#x#{$1};" end else "&#{match};" end end end # Synonym for CGI::escapeHTML(str) alias escape_html escapeHTML # Synonym for CGI::unescapeHTML(str) alias unescape_html unescapeHTML # Escape only the tags of certain HTML elements in +string+. # # Takes an element or elements or array of elements. Each element # is specified by the name of the element, without angle brackets. # This matches both the start and the end tag of that element. # The attribute list of the open tag will also be escaped (for # instance, the double-quotes surrounding attribute values). # # print CGI::escapeElement('<BR><A HREF="url"></A>', "A", "IMG") # # "<BR><A HREF="url"></A&gt" # # print CGI::escapeElement('<BR><A HREF="url"></A>', ["A", "IMG"]) # # "<BR><A HREF="url"></A&gt" def escapeElement(string, elements) elements = elements[0] if elements[0].kind_of?(Array) unless elements.empty? string.gsub(/<\/?(?:#{elements.join("\|")})(?!\w)(?:.\|\n)?>/i) do CGI::escapeHTML($&) end else string end end # Undo escaping such as that done by CGI::escapeElement() # # print CGI::unescapeElement( # CGI::escapeHTML('<BR><A HREF="url"></A>'), "A", "IMG") # # "<BR><A HREF="url"></A>" # # print CGI::unescapeElement( # CGI::escapeHTML('<BR><A HREF="url"></A>'), ["A", "IMG"]) # # "<BR><A HREF="url"></A>" def unescapeElement(string, elements) elements = elements[0] if elements[0].kind_of?(Array) unless elements.empty? string.gsub(/<\/?(?:#{elements.join("\|")})(?!\w)(?:.\|\n)?>/i) do unescapeHTML($&) end else string end end # Synonym for CGI::escapeElement(str) alias escape_element escapeElement # Synonym for CGI::unescapeElement(str) alias unescape_element unescapeElement # Abbreviated day-of-week names specified by RFC 822 RFC822_DAYS = %w[ Sun Mon Tue Wed Thu Fri Sat ] # Abbreviated month names specified by RFC 822 RFC822_MONTHS = %w[ Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ] # Format a +Time+ object as a String using the format specified by RFC 1123. # # CGI::rfc1123_date(Time.now) # # Sat, 01 Jan 2000 00:00:00 GMT def rfc1123_date(time) t = time.clone.gmtime return format("%s, %.2d %s %.4d %.2d:%.2d:%.2d GMT", RFC822_DAYS[t.wday], t.day, RFC822_MONTHS[t.month-1], t.year, t.hour, t.min, t.sec) end # Prettify (indent) an HTML string. # # +string+ is the HTML string to indent. +shift+ is the indentation # unit to use; it defaults to two spaces. # # print CGI::pretty("<HTML><BODY></BODY></HTML>") # # <HTML> # # <BODY> # # </BODY> # # </HTML> # # print CGI::pretty("<HTML><BODY></BODY></HTML>", "\t") # # <HTML> # # <BODY> # # </BODY> # # </HTML> # def pretty(string, shift = " ") lines = string.gsub(/(?!\A)<.?>/m, "\n\\0").gsub(/<.?>(?!\n)/m, "\\0\n") end_pos = 0 while end_pos = lines.index(/^<\/(\w+)/, end_pos) element = $1.dup start_pos = lines.rindex(/^\s<#{element}/i, end_pos) lines[start_pos ... end_pos] = "__" + lines[start_pos ... end_pos].gsub(/\n(?!\z)/, "\n" + shift) + "__" end lines.gsub(/^((?:#{Regexp::quote(shift)})*)__(?=<\/?\w)/, '\1') end alias h escapeHTML end Back

Edit File : util.rb | Size : 6.41 KB

class CGI; module Util; end; extend Util; end
module CGI::Util
  @@accept_charset="UTF-8" unless defined?(@@accept_charset)
  # URL-encode a string.
  #   url_encoded_string = CGI::escape("'Stop!' said Fred")
  #      # => "%27Stop%21%27+said+Fred"
  def escape(string)
    encoding = string.encoding
    string.b.gsub(/([^ a-zA-Z0-9_.-]+)/) do |m|
      '%' + m.unpack('H2' * m.bytesize).join('%').upcase
    end.tr(' ', '+').force_encoding(encoding)
  end

# URL-decode a string with encoding(optional).
  #   string = CGI::unescape("%27Stop%21%27+said+Fred")
  #      # => "'Stop!' said Fred"
  def unescape(string,encoding=@@accept_charset)
    str=string.tr('+', ' ').b.gsub(/((?:%[0-9a-fA-F]{2})+)/) do |m|
      [m.delete('%')].pack('H*')
    end.force_encoding(encoding)
    str.valid_encoding? ? str : str.force_encoding(string.encoding)
  end

# The set of special characters and their escaped values
 TABLE_FOR_ESCAPE_HTML__ = {
 "'" => '&#39;',
 '&' => '&amp;',
 '"' => '&quot;',
 '<' => '&lt;',
 '>' => '&gt;',
 }

# Escape special characters in HTML, namely &\"<>
 # CGI::escapeHTML('Usage: foo "bar" <baz>')
 # # => "Usage: foo &quot;bar&quot; &lt;baz&gt;"
 def escapeHTML(string)
 string.gsub(/['&\"<>]/, TABLE_FOR_ESCAPE_HTML__)
 end

# Unescape a string that has been HTML-escaped
 # CGI::unescapeHTML("Usage: foo &quot;bar&quot; &lt;baz&gt;")
 # # => "Usage: foo \"bar\" <baz>"
 def unescapeHTML(string)
 return string unless string.include? '&'
 enc = string.encoding
 if enc != Encoding::UTF_8 && [Encoding::UTF_16BE, Encoding::UTF_16LE, Encoding::UTF_32BE, Encoding::UTF_32LE].include?(enc)
 return string.gsub(Regexp.new('&(apos|amp|quot|gt|lt|#[0-9]+|#x[0-9A-Fa-f]+);'.encode(enc))) do
 case $1.encode(Encoding::US_ASCII)
 when 'apos' then "'".encode(enc)
 when 'amp' then '&'.encode(enc)
 when 'quot' then '"'.encode(enc)
 when 'gt' then '>'.encode(enc)
 when 'lt' then '<'.encode(enc)
 when /\A#0*(\d+)\z/ then $1.to_i.chr(enc)
 when /\A#x([0-9a-f]+)\z/i then $1.hex.chr(enc)
 end
 end
 end
 asciicompat = Encoding.compatible?(string, "a")
 string.gsub(/&(apos|amp|quot|gt|lt|\#[0-9]+|\#[xX][0-9A-Fa-f]+);/) do
 match = $1.dup
 case match
 when 'apos' then "'"
 when 'amp' then '&'
 when 'quot' then '"'
 when 'gt' then '>'
 when 'lt' then '<'
 when /\A#0*(\d+)\z/
 n = $1.to_i
 if enc == Encoding::UTF_8 or
 enc == Encoding::ISO_8859_1 && n < 256 or
 asciicompat && n < 128
 n.chr(enc)
 else
 "&##{$1};"
 end
 when /\A#x([0-9a-f]+)\z/i
 n = $1.hex
 if enc == Encoding::UTF_8 or
 enc == Encoding::ISO_8859_1 && n < 256 or
 asciicompat && n < 128
 n.chr(enc)
 else
 "&#x#{$1};"
 end
 else
 "&#{match};"
 end
 end
 end

# Synonym for CGI::escapeHTML(str)
  alias escape_html escapeHTML

# Synonym for CGI::unescapeHTML(str)
  alias unescape_html unescapeHTML

# Escape only the tags of certain HTML elements in +string+.
 #
 # Takes an element or elements or array of elements. Each element
 # is specified by the name of the element, without angle brackets.
 # This matches both the start and the end tag of that element.
 # The attribute list of the open tag will also be escaped (for
 # instance, the double-quotes surrounding attribute values).
 #
 # print CGI::escapeElement(' <A HREF="url"></A>', "A", "IMG")
 # # " &lt;A HREF=&quot;url&quot;&gt;&lt;/A&gt"
 #
 # print CGI::escapeElement(' <A HREF="url"></A>', ["A", "IMG"])
 # # " &lt;A HREF=&quot;url&quot;&gt;&lt;/A&gt"
 def escapeElement(string, *elements)
 elements = elements[0] if elements[0].kind_of?(Array)
 unless elements.empty?
 string.gsub(/<\/?(?:#{elements.join("|")})(?!\w)(?:.|\n)*?>/i) do
 CGI::escapeHTML($&)
 end
 else
 string
 end
 end

# Undo escaping such as that done by CGI::escapeElement()
 #
 # print CGI::unescapeElement(
 # CGI::escapeHTML(' <A HREF="url"></A>'), "A", "IMG")
 # # "&lt;BR&gt;<A HREF="url"></A>"
 #
 # print CGI::unescapeElement(
 # CGI::escapeHTML(' <A HREF="url"></A>'), ["A", "IMG"])
 # # "&lt;BR&gt;<A HREF="url"></A>"
 def unescapeElement(string, *elements)
 elements = elements[0] if elements[0].kind_of?(Array)
 unless elements.empty?
 string.gsub(/&lt;\/?(?:#{elements.join("|")})(?!\w)(?:.|\n)*?&gt;/i) do
 unescapeHTML($&)
 end
 else
 string
 end
 end

# Synonym for CGI::escapeElement(str)
  alias escape_element escapeElement

# Synonym for CGI::unescapeElement(str)
  alias unescape_element unescapeElement

# Abbreviated day-of-week names specified by RFC 822
  RFC822_DAYS = %w[ Sun Mon Tue Wed Thu Fri Sat ]

# Abbreviated month names specified by RFC 822
  RFC822_MONTHS = %w[ Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ]

# Format a +Time+ object as a String using the format specified by RFC 1123.
  #
  #   CGI::rfc1123_date(Time.now)
  #     # Sat, 01 Jan 2000 00:00:00 GMT
  def rfc1123_date(time)
    t = time.clone.gmtime
    return format("%s, %.2d %s %.4d %.2d:%.2d:%.2d GMT",
                  RFC822_DAYS[t.wday], t.day, RFC822_MONTHS[t.month-1], t.year,
                  t.hour, t.min, t.sec)
  end

# Prettify (indent) an HTML string.
 #
 # +string+ is the HTML string to indent. +shift+ is the indentation
 # unit to use; it defaults to two spaces.
 #
 # print CGI::pretty("<HTML><BODY></BODY></HTML>")
 # # <HTML>
 # # <BODY>
 # # </BODY>
 # # </HTML>
 #
 # print CGI::pretty("<HTML><BODY></BODY></HTML>", "\t")
 # # <HTML>
 # # <BODY>
 # # </BODY>
 # # </HTML>
 #
 def pretty(string, shift = " ")
 lines = string.gsub(/(?!\A)<.*?>/m, "\n\\0").gsub(/<.*?>(?!\n)/m, "\\0\n")
 end_pos = 0
 while end_pos = lines.index(/^<\/(\w+)/, end_pos)
 element = $1.dup
 start_pos = lines.rindex(/^\s*<#{element}/i, end_pos)
 lines[start_pos ... end_pos] = "__" + lines[start_pos ... end_pos].gsub(/\n(?!\z)/, "\n" + shift) + "__"
 end
 lines.gsub(/^((?:#{Regexp::quote(shift)})*)__(?=<\/?\w)/, '\1')
 end

alias h escapeHTML
end

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