Module: Watobo::Mixins::RequestParser

Defined in:
lib/watobo/mixins/request_parser.rb

Overview

This mixin can be used to parse a String or any object which supports method.to_s into a valid http request string

Instance Method Summary collapse

Instance Method Details

#parse_code(prefs = {}) ⇒ Object

This method parses (eval) ruby code which is included in the string. Ruby code is identified by its surrounding delimiters - default: ‘%%’. For examples the string ‘ABC%%“_”*10%%DEFG’ will result to ‘ABC__________DEFG’

Possible prefs:

:code_dlmtr [String] - set ruby code delimiter



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# File 'lib/watobo/mixins/request_parser.rb', line 14

def parse_code(prefs={})
  cprefs = { :code_dlmtr => '%%' } # default delimiter for ruby code
  cprefs.update(prefs)

  #pattern="(#{cprefs[:code_dlmtr]}.*?#{cprefs[:code_dlmtr]})"
  pattern = cprefs[:code_dlmtr]
  request = self.to_s
  expression = ""

  begin
    # puts new_request
    expr = ''

    pos = 0
    off = 0
    match = []
    code_marks = []
    while pos >= 0 and pos < request.length
      code_offset = request.index(pattern, pos)

      unless code_offset.nil?
        new_line_index = request.index("\n", pos)   
        unless new_line_index.nil?
          if new_line_index < code_offset
            # new_request << request[match[0]..code_offset-1] unless match.empty?
            match = [] 
            # pos = code_offset
          end
        end
        match << code_offset

        if match.length == 2
          code_marks << match.dup
          match = []
        end
        pos = code_offset + pattern.length
      else
        break
      end
    end

    new_request = ''
    unless code_marks.empty?           
      code_marks.each_with_index do |cm,i|
        #puts cm.to_yaml
        last = i > 0 ? ( code_marks[i-1][1] + pattern.length ) : 0
        new_request << request[last..cm[0]-1] if cm[0] > 0
        exp_start = cm[0] + pattern.length
        exp_end = cm[1] - 1

        expression = request[exp_start..exp_end]
        expression.strip!
        next if expression.empty?
        puts "DEBUG: executing: #{expression}" if $DEBUG
        #result = expression.empty? ? "" : eval("#{expression}")
        result = eval(expression)
        puts "DEBUG: got #{result.class}" if $DEBUG
        if result.is_a? File
          data = result.read
          result.close
        elsif result.is_a? String
          data = result
        elsif result.is_a? Array
          data = result.join
        else
          puts "!!!WATOBO - expression must return String or File !!!"
        end
        new_request << data
      end
      new_request << request[code_marks.last[1]+pattern.length..-1] unless code_marks.last[1] >= request.length-1

    else
      new_request = request
    end

    return new_request

  rescue SyntaxError, LocalJumpError, NameError => e
    #  raise SyntaxError, "SyntaxError in '#{expression}'"
    puts e
    puts e.backtrace

  end
  return nil
end

#to_request(opts = {}) ⇒ Object 



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# File 'lib/watobo/mixins/request_parser.rb', line 101

def to_request(opts={})
  options = { :update_content_length => false }
  options.update opts
  body = nil
  begin
    text = parse_code
    request = []

    eoh = nil
    eoh = text.index("\n\n") unless text.nil?

    unless eoh.nil?
      header = text.slice(0, eoh).split("\n").map{|h| "#{h}\r\n"}
      body = text.slice(eoh+2, text.length-1)
    else
      header = text.split(/\n/).map{|h| "#{h}\r\n"}
      body = nil
    end

    request.concat header

    #Watobo::Request.create request
    request = Watobo::Request.new(request)

    ct = request.content_type_ex
    # puts ct
    # last line is without "\r\n" if text has a body
    if ct =~ /multipart/ and body then
      #Content-Type: multipart/form-data; boundary=---------------------------3035221901842
      if ct =~ /boundary=([\-\w]+)/
        boundary = $1.strip
        chunks = body.split(/--#{boundary}[\-]{0,2}/)
        #chunks.pop # remove "--"
        #puts "Multipart request has #{chunks.length} chunks"
        new_body = []
        chunks.each do |c|
          new_chunk = ''
          #c.gsub!(/[\-]+$/,'')
          next if c.nil?
          next if c.strip.empty?
          c.strip!
          if c =~ /\n\n/
            ctmp = c.split(/\n\n/)
            cheader = ctmp.shift.split(/\n/)
            cbody = ctmp.join("\n\n")
          else
            cheader = c.split(/\n/)
            cbody = nil
          end
          new_chunk = cheader.join("\r\n")
          new_chunk +=  "\r\n\r\n"
          new_chunk += cbody.strip + "\r\n" if cbody

          # puts cbody
          new_body.push new_chunk

        end
        body = "--#{boundary}\r\n"
        body << new_body.join("--#{boundary}\r\n")
        body << "--#{boundary}--\r\n"
      end
      #  body.gsub!(/\n/, "\r\n") if body

    end

    unless body.nil?
      request.push "\r\n"
      request.push body.strip
    end

    request.fixupContentLength() if options[:update_content_length] == true
    return request
  rescue => bang
    puts bang
    puts bang.backtrace
    raise bang
  end
  #return nil
end

#to_request_UNUSED(opts = {}) ⇒ Object 



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# File 'lib/watobo/mixins/request_parser.rb', line 223

def to_request_UNUSED(opts={})
  options = { :update_content_length => false }
  options.update opts
  begin
    text = parse_code
    result = []

    if text =~ /\n\n/
      dummy = text.split(/\n\n/)
      header = dummy.shift.split(/\n/)
      body = dummy.join("\n\n")
    else
      header = text.split(/\n/)
      body = nil
    end

    header.each do |h|
      result.push "#{h}\r\n"
    end

    # result.extend Watobo::Mixin::Parser::Url
    # result.extend Watobo::Mixin::Parser::Web10
    # result.extend Watobo::Mixin::Shaper::Web10
    #Watobo::Request.create result
    result = Watobo::Request.new(result)

    ct = result.content_type
    # last line is without "\r\n" if text has a body
    if ct =~ /multipart\/form/ and body then
      #Content-Type: multipart/form-data; boundary=---------------------------3035221901842
      if ct =~ /boundary=([\-\w]+)/
        boundary = $1.strip
        chunks = body.split(boundary)
        e = chunks.pop # remove "--"
        new_body = []
        chunks.each do |c|
          new_chunk = ''
          c.gsub!(/[\-]+$/,'')
          next if c.nil?
          next if c.strip.empty?
          c.strip!
          if c =~ /\n\n/
            ctmp = c.split(/\n\n/)
            cheader = ctmp.shift.split(/\n/)
            cbody = ctmp.join("\n\n")
          else
            cheader = c.split(/\n/)
            cbody = nil
          end
          new_chunk = cheader.join("\r\n")
          new_chunk +=  "\r\n\r\n"
          new_chunk += cbody.strip + "\r\n" if cbody

          # puts cbody
          new_body.push new_chunk

        end
        body = "--#{boundary}\r\n"
        body += new_body.join("--#{boundary}\r\n")
        body += "--#{boundary}--"
      end
      #  body.gsub!(/\n/, "\r\n") if body

    end

    if body then
      result.push "\r\n"
      result.push body.strip
    end

    result.fixupContentLength() if options[:update_content_length] == true
    return result
  rescue
    raise
  end
  #return nil
end

#to_response(opts = {}) ⇒ Object 



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# File 'lib/watobo/mixins/request_parser.rb', line 181

def to_response(opts={})
  options = { :update_content_length => false }
  options.update opts
  begin
    text = parse_code
    result = []

    if text =~ /\n\n/
      dummy = text.split(/\n\n/)
      header = dummy.shift.split(/\n/)
      body = dummy.join("\n\n")
    else
      header = text.split(/\n/)
      body = nil
    end

    header.each do |h|
      result.push "#{h}\r\n"
    end


    #Watobo::Response.create result
    result = Watobo::Response.new(result)

    if body then
      result.push "\r\n"
      result.push body.strip
    end

    result.fixupContentLength() if options[:update_content_length] == true
    puts ">>"
    puts result
    return result
  rescue => bang
    puts bang
    puts bang.backtrace
    raise bang
  end
  #return nil
end