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 35

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..-2] 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 122

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 244

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 202

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