Class: NchanTools::Subscriber::LongPollClient::HTTPBundle

Inherits:
ParserBundle
  • Object
show all
Defined in:
lib/nchan_tools/pubsub.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(uri, opt = {}) ⇒ HTTPBundle

Returns a new instance of HTTPBundle.



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# File 'lib/nchan_tools/pubsub.rb', line 727

def initialize(uri, opt={})
  super
  @accept = opt[:accept] or "*/*"
  @rcvbuf=""
  @sndbuf=""
  @parser = Http::Parser.new
  @done = false
  extra_headers = (opt[:headers] or opt[:extra_headers] or {}).map{|k,v| "#{k}: #{v}\n"}.join ""
  host = uri.host.match "[^/]+$"
  request_uri = "#{uri.path}#{uri.query && "?#{uri.query}"}"
  @send_noid_str= <<-END.gsub(/^ {10}/, '')
    GET #{request_uri} HTTP/1.1
    Host: #{host}#{uri.default_port == uri.port ? "" : ":#{uri.port}"}
    #{extra_headers}Accept: #{@accept}
    User-Agent: #{opt[:useragent] || "HTTPBundle"}
    
  END
  
  @send_withid_fmt= <<-END.gsub(/^ {10}/, '')
    GET #{request_uri.gsub("%", "%%")} HTTP/1.1
    Host: #{host}#{uri.default_port == uri.port ? "" : ":#{uri.port}"}
    #{extra_headers}Accept: #{@accept}
    User-Agent: #{opt[:useragent] || "HTTPBundle"}
    If-Modified-Since: %s
    If-None-Match: %s
    
  END
  
  @send_withid_no_etag_fmt= <<-END.gsub(/^ {10}/, '')
    GET #{request_uri.gsub("%", "%%")} HTTP/1.1
    Host: #{host}#{uri.default_port == uri.port ? "" : ":#{uri.port}"}
    #{extra_headers}Accept: #{@accept}
    User-Agent: #{opt[:useragent] || "HTTPBundle"}
    If-Modified-Since: %s
    
  END
  
  @parser.on_headers_complete = proc do |h|
    if verbose 
      puts "< HTTP/1.1 #{@parser.status_code} [...]\r\n#{h.map {|k,v| "< #{k}: #{v}"}.join "\r\n"}"
    end
    @headers=h
    @last_modified = h['Last-Modified']
    @etag = h['Etag']
    @chunky = h['Transfer-Encoding']=='chunked'
    @gzipped = h['Content-Encoding']=='gzip'
    @code=@parser.status_code
    on_headers @parser.status_code, h
    if @stop_after_headers
      @bypass_parser = true
      :stop
    end
  end
  
  @parser.on_body = proc do |chunk|
    handle_chunk chunk
  end
  
  @parser.on_message_complete = proc do
    @chunky = nil
    @gzipped = nil
    on_response @parser.status_code, @parser.headers
  end
  
end

Instance Attribute Details

#done ⇒ Object

Returns the value of attribute done.



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# File 'lib/nchan_tools/pubsub.rb', line 725

def done
  @done
end

#last_message_time ⇒ Object

Returns the value of attribute last_message_time.



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# File 'lib/nchan_tools/pubsub.rb', line 725

def last_message_time
  @last_message_time
end

#parser ⇒ Object

Returns the value of attribute parser.



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# File 'lib/nchan_tools/pubsub.rb', line 725

def parser
  @parser
end

#request_time ⇒ Object

Returns the value of attribute request_time.



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# File 'lib/nchan_tools/pubsub.rb', line 725

def request_time
  @request_time
end

#sock ⇒ Object

Returns the value of attribute sock.



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# File 'lib/nchan_tools/pubsub.rb', line 725

def sock
  @sock
end

#stop_after_headers ⇒ Object

Returns the value of attribute stop_after_headers.



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# File 'lib/nchan_tools/pubsub.rb', line 725

def stop_after_headers
  @stop_after_headers
end

#time_requested ⇒ Object

Returns the value of attribute time_requested.



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# File 'lib/nchan_tools/pubsub.rb', line 725

def time_requested
  @time_requested
end

Instance Method Details

#read ⇒ Object 



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# File 'lib/nchan_tools/pubsub.rb', line 833

def read
  @rcvbuf.clear
  begin
    sock.readpartial(1024*10000, @rcvbuf)
    while @rcvbuf.size > 0
      unless @bypass_parser
        offset = @parser << @rcvbuf
        if offset < @rcvbuf.size
          @rcvbuf = @rcvbuf[offset..-1]
        else
          @rcvbuf.clear
        end
      else
        handle_chunk @rcvbuf
        @rcvbuf.clear
      end
    end
  rescue HTTP::Parser::Error => e
    on_error "Invalid HTTP Respose - #{e}", e
  rescue EOFError => e
    on_error "Server closed connection...", e
  rescue => e 
    on_error "#{e.class}: #{e}", e
  end
  return false if @done || sock.closed?
end

#reconnect? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/nchan_tools/pubsub.rb', line 800

def reconnect?
  true
end

#send_GET(msg_time = nil, msg_tag = nil) ⇒ Object 



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# File 'lib/nchan_tools/pubsub.rb', line 804

def send_GET(msg_time=nil, msg_tag=nil)
  @last_modified = msg_time.to_s if msg_time
  @etag = msg_tag.to_s if msg_tag
  @sndbuf.clear 
  begin
    data = if @last_modified
      @etag ? sprintf(@send_withid_fmt, @last_modified, @etag) : sprintf(@send_withid_no_etag_fmt, @last_modified)
    else
      @send_noid_str
    end
  rescue Exception => e
    binding.pry
  end
  
  @sndbuf << data
  
  if @headers && @headers["Connection"]=="close" && [200, 201, 202, 304, 408].member?(@parser.status_code) && reconnect?
    sock.close
    open_socket
    @parser.reset!
  end
  
  @time_requested=Time.now.to_f
  if verbose
    puts "", data.gsub(/^.*$/, "> \\0")
  end
  sock << @sndbuf
end