Class: Knjappserver::Httpsession::Contentgroup

Inherits:
Object
  • Object
show all
Defined in:
lib/include/class_httpsession_contentgroup.rb

Overview

This class handels the adding of content and writing to socket. Since this can be done with multiple threads and multiple IO’s it can get complicated.

Constant Summary collapse

NL = 
"\r\n"

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(args = {}) ⇒ Contentgroup

Returns a new instance of Contentgroup.



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# File 'lib/include/class_httpsession_contentgroup.rb', line 9

def initialize(args = {})
  @socket = args[:socket]
  @chunked = args[:chunked]
  @resp = args[:resp]
  @httpsession = args[:httpsession]
  @mutex = Mutex.new
  @debug = false
end

Instance Attribute Details

#chunked ⇒ Object

Returns the value of attribute chunked.



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# File 'lib/include/class_httpsession_contentgroup.rb', line 6

def chunked
  @chunked
end

#cur_data ⇒ Object (readonly)

Returns the value of attribute cur_data.



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# File 'lib/include/class_httpsession_contentgroup.rb', line 5

def cur_data
  @cur_data
end

#done ⇒ Object (readonly)

Returns the value of attribute done.



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# File 'lib/include/class_httpsession_contentgroup.rb', line 5

def done
  @done
end

#socket ⇒ Object

Returns the value of attribute socket.



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# File 'lib/include/class_httpsession_contentgroup.rb', line 6

def socket
  @socket
end

Instance Method Details

#force_content(newcont) ⇒ Object

Forces the content to be the input - nothing else can be added after calling this.



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# File 'lib/include/class_httpsession_contentgroup.rb', line 48

def force_content(newcont)
  @ios = [{:str => newcont, :done => true}]
end

#init ⇒ Object 



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# File 'lib/include/class_httpsession_contentgroup.rb', line 18

def init
  @done = false
  @thread = nil
  @cur_data = {
    :str => "",
    :done => false
  }
  @ios = [@cur_data]
end

#join ⇒ Object 



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# File 'lib/include/class_httpsession_contentgroup.rb', line 111

def join
  return nil if @forced
  sleep 0.1 while !@thread
  @thread.join
end

#mark_done ⇒ Object 



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# File 'lib/include/class_httpsession_contentgroup.rb', line 106

def mark_done
  @cur_data[:done] = true
  @done = true
end

#new_io(obj = "") ⇒ Object 



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# File 'lib/include/class_httpsession_contentgroup.rb', line 41

def new_io(obj = "")
  @cur_data[:done] = true if @cur_data
  @cur_data = {:str => obj, :done => false}
  @ios << @cur_data
end

#new_thread ⇒ Object 



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# File 'lib/include/class_httpsession_contentgroup.rb', line 57

def new_thread
  cgroup = Knjappserver::Httpsession::Contentgroup.new(:socket => @socket, :chunked => @chunked)
  cgroup.init
  
  @mutex.synchronize do
    @ios << cgroup
    self.new_io
  end
  
  self.register_thread
  return cgroup
end

#register_thread ⇒ Object 



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# File 'lib/include/class_httpsession_contentgroup.rb', line 52

def register_thread
  Thread.current[:knjappserver] = {} if !Thread.current[:knjappserver]
  Thread.current[:knjappserver][:contentgroup] = self
end

#reset ⇒ Object 



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# File 'lib/include/class_httpsession_contentgroup.rb', line 28

def reset
  @ios = []
  @done = false
  @thread = nil
  @forced = false
  
  @mutex.synchronize do
    self.new_io
  end
  
  self.register_thread
end

#write(cont) ⇒ Object 



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# File 'lib/include/class_httpsession_contentgroup.rb', line 78

def write(cont)
  @mutex.synchronize do
    @cur_data[:str] << cont
  end
end

#write_begin ⇒ Object 



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# File 'lib/include/class_httpsession_contentgroup.rb', line 70

def write_begin
  begin
    @resp.write if @httpsession.meta["METHOD"] != "HEAD"
  rescue Errno::ECONNRESET, Errno::ENOTCONN, Errno::EPIPE
    #Ignore - the user probaly left.
  end
end

#write_force ⇒ Object 



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# File 'lib/include/class_httpsession_contentgroup.rb', line 94

def write_force
  @mutex.synchronize do
    @forced = true if !@thread
  end
  
  if @thread
    @thread.join
  else
    self.write_begin
  end
end

#write_output ⇒ Object 



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# File 'lib/include/class_httpsession_contentgroup.rb', line 84

def write_output
  return nil if @thread
  
  @mutex.synchronize do
    @thread = Thread.new do
      self.write_begin
    end
  end
end

#write_to_socket ⇒ Object 



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# File 'lib/include/class_httpsession_contentgroup.rb', line 117

def write_to_socket
  count = 0
  
  @ios.each do |data|
    if data.is_a?(Knjappserver::Httpsession::Contentgroup)
      data.write_to_socket
    elsif data.key?(:str)
      if data[:str].is_a?(Hash) and data[:str][:type] == :file
        File.open(data[:str][:path], "r") do |file|
          loop do
            begin
              buf = file.sysread(16384)
            rescue EOFError
              break
            end
            
            if @chunked
              @socket.write("#{buf.length.to_s(16)}#{NL}#{buf}#{NL}")
            else
              @socket.write(buf)
            end
          end
        end
      else
        loop do
          break if data[:done] and data[:str].size <= 0 
          sleep 0.1 while data[:str].size < 512 and !data[:done]
          
          str = nil
          @mutex.synchronize do
            str = data[:str].bytes
            data[:str] = ""
          end
          
          #512 could take a long time for big pages. 16384 seems to be an optimal number.
          str.each_slice(16384) do |slice|
            buf = slice.pack("C*")
            
            if @chunked
              @socket.write("#{buf.length.to_s(16)}#{NL}#{buf}#{NL}")
            else
              @socket.write(buf)
            end
          end
        end
      end
    else
      raise "Unknown object: '#{data.class.name}'."
    end
  end
  
  count += 1
end