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


35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
# 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


122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
# 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


244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
# 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


202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
# 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