Class: Knjappserver::Httpsession

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

Overview

This class handels the HTTP-sessions.

Defined Under Namespace

Classes: Contentgroup, Http_request, Http_response, Page_environment, Post_multipart

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(httpserver, socket) ⇒ Httpsession

Returns a new instance of Httpsession.



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# File 'lib/include/class_httpsession.rb', line 12

def initialize(httpserver, socket)
  @data = {}
  @socket = socket
  @httpserver = httpserver
  @kas = httpserver.kas
  @types = @kas.types
  @config = @kas.config
  @active = true
  @debug = @kas.debug
  @handlers_cache = @config[:handlers_cache]
  @httpsession_var = {}
  
  @eruby = Knj::Eruby.new(
    :cache_hash => @kas.eruby_cache,
    :binding_callback => self.method(:create_binding)
  )
  
  #Set socket stuff.
  if RUBY_PLATFORM == "java" or RUBY_ENGINE == "rbx"
    if @kas.config[:peeraddr_static]
      addr_peer = [0, 0, @kas.config[:peeraddr_static]]
    else
      addr_peer = @socket.peeraddr
    end
    
    addr = @socket.addr
  else
    addr = @socket.addr(false)
    addr_peer = @socket.peeraddr(false)
  end
  
  @socket_meta = {
    "REMOTE_ADDR" => addr[2],
    "REMOTE_PORT" => addr[1],
    "SERVER_ADDR" => addr_peer[2],
    "SERVER_PORT" => addr_peer[1]
  }
  
  @resp = Knjappserver::Httpsession::Http_response.new(:socket => @socket)
  @handler = Knjappserver::Httpsession::Http_request.new(:kas => @kas, :httpsession => self)
  @cgroup = Knjappserver::Httpsession::Contentgroup.new(:socket => @socket, :kas => @kas, :resp => @resp, :httpsession => self)
  @resp.cgroup = @cgroup
  
  Dir.chdir(@config[:doc_root])
  ObjectSpace.define_finalizer(self, self.class.method(:finalize).to_proc) if @debug
  STDOUT.print "New httpsession #{self.__id__} (total: #{@httpserver.http_sessions.count}).\n" if @debug
  
  @thread_request = Thread.new(&self.method(:thread_request_run))
end

Instance Attribute Details

#active ⇒ Object (readonly)

Returns the value of attribute active.



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# File 'lib/include/class_httpsession.rb', line 4

def active
  @active
end

#alert_sent ⇒ Object

Returns the value of attribute alert_sent.



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# File 'lib/include/class_httpsession.rb', line 3

def alert_sent
  @alert_sent
end

#browser ⇒ Object (readonly)

Returns the value of attribute browser.



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# File 'lib/include/class_httpsession.rb', line 4

def browser
  @browser
end

#cgroup ⇒ Object (readonly)

Returns the value of attribute cgroup.



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# File 'lib/include/class_httpsession.rb', line 4

def cgroup
  @cgroup
end

#cookie ⇒ Object (readonly)

Returns the value of attribute cookie.



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# File 'lib/include/class_httpsession.rb', line 4

def cookie
  @cookie
end

#data ⇒ Object

Returns the value of attribute data.



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# File 'lib/include/class_httpsession.rb', line 3

def data
  @data
end

#debug ⇒ Object (readonly)

Returns the value of attribute debug.



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# File 'lib/include/class_httpsession.rb', line 4

def debug
  @debug
end

#eruby ⇒ Object (readonly)

Returns the value of attribute eruby.



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# File 'lib/include/class_httpsession.rb', line 4

def eruby
  @eruby
end

#get ⇒ Object (readonly)

Returns the value of attribute get.



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# File 'lib/include/class_httpsession.rb', line 4

def get
  @get
end

#handler ⇒ Object (readonly)

Returns the value of attribute handler.



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# File 'lib/include/class_httpsession.rb', line 4

def handler
  @handler
end

#headers ⇒ Object (readonly)

Returns the value of attribute headers.



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# File 'lib/include/class_httpsession.rb', line 4

def headers
  @headers
end

#httpsession_var ⇒ Object (readonly)

Returns the value of attribute httpsession_var.



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# File 'lib/include/class_httpsession.rb', line 4

def httpsession_var
  @httpsession_var
end

#kas ⇒ Object (readonly)

Returns the value of attribute kas.



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# File 'lib/include/class_httpsession.rb', line 4

def kas
  @kas
end

#meta ⇒ Object (readonly)

Returns the value of attribute meta.



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# File 'lib/include/class_httpsession.rb', line 4

def meta
  @meta
end

#out ⇒ Object (readonly)

Returns the value of attribute out.



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# File 'lib/include/class_httpsession.rb', line 4

def out
  @out
end

#page_path ⇒ Object (readonly)

Returns the value of attribute page_path.



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# File 'lib/include/class_httpsession.rb', line 4

def page_path
  @page_path
end

#post ⇒ Object (readonly)

Returns the value of attribute post.



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# File 'lib/include/class_httpsession.rb', line 4

def post
  @post
end

#resp ⇒ Object (readonly)

Returns the value of attribute resp.



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# File 'lib/include/class_httpsession.rb', line 4

def resp
  @resp
end

#session ⇒ Object (readonly)

Returns the value of attribute session.



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# File 'lib/include/class_httpsession.rb', line 4

def session
  @session
end

#session_hash ⇒ Object (readonly)

Returns the value of attribute session_hash.



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# File 'lib/include/class_httpsession.rb', line 4

def session_hash
  @session_hash
end

#session_id ⇒ Object (readonly)

Returns the value of attribute session_id.



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# File 'lib/include/class_httpsession.rb', line 4

def session_id
  @session_id
end

#working ⇒ Object (readonly)

Returns the value of attribute working.



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# File 'lib/include/class_httpsession.rb', line 4

def working
  @working
end

Class Method Details

.const_missing(name) ⇒ Object

Autoloader for subclasses.



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# File 'lib/include/class_httpsession.rb', line 7

def self.const_missing(name)
  require "#{File.dirname(__FILE__)}/class_httpsession_#{name.to_s.downcase}.rb"
  return Knjappserver::Httpsession.const_get(name.to_s.to_sym)
end

.finalize(id) ⇒ Object 



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# File 'lib/include/class_httpsession.rb', line 182

def self.finalize(id)
  STDOUT.print "Httpsession finalize #{id}.\n" if @debug
end

Instance Method Details

#add_size(size) ⇒ Object

Is called when content is added and begings to write the output if it goes above the limit.



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# File 'lib/include/class_httpsession.rb', line 142

def add_size(size)
  @written_size += size
  @cgroup.write_output if @written_size >= @size_send
end

#create_binding ⇒ Object

Creates a new Knjappserver::Binding-object and returns the binding for that object.



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# File 'lib/include/class_httpsession.rb', line 136

def create_binding
  binding_obj = Knjappserver::Httpsession::Page_environment.new(:httpsession => self, :kas => @kas)
  return binding_obj.get_binding
end

#destruct ⇒ Object 



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# File 'lib/include/class_httpsession.rb', line 186

def destruct
  STDOUT.print "Httpsession destruct (#{@httpserver.http_sessions.length})\n" if @debug and @httpserver and @httpserver.http_sessions
  
  begin
    @socket.close if !@socket.closed?
  rescue => e
    STDOUT.puts e.inspect
    STDOUT.puts e.backtrace
    #ignore if it fails...
  end
  
  @httpserver.http_sessions.delete(self) if @httpserver and @httpserver.http_sessions
  
  @eruby.destroy if @eruby
  @thread_request.kill if @thread_request.alive?
end

#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.rb', line 204

def force_content(newcont)
  @cgroup.force_content(newcont)
end

#init_thread ⇒ Object 



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# File 'lib/include/class_httpsession.rb', line 171

def init_thread
  Thread.current[:knjappserver] = {} if !Thread.current[:knjappserver]
  Thread.current[:knjappserver][:kas] = @kas
  Thread.current[:knjappserver][:httpsession] = self
  Thread.current[:knjappserver][:session] = @session
  Thread.current[:knjappserver][:get] = @get
  Thread.current[:knjappserver][:post] = @post
  Thread.current[:knjappserver][:meta] = @meta
  Thread.current[:knjappserver][:cookie] = @cookie
end

#serve ⇒ Object 



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# File 'lib/include/class_httpsession.rb', line 208

def serve
  STDOUT.print "Generating meta, cookie, get, post and headers.\n" if @debug
  @meta = @handler.meta.merge(@socket_meta)
  @cookie = @handler.cookie
  @get = @handler.get
  @post = @handler.post
  @headers = @handler.headers
  
  close = true if @meta["HTTP_CONNECTION"] == "close"
  @resp.reset(
    :http_version => @handler.http_version,
    :close => close 
  )
  if @handler.http_version == "1.1"
    @cgroup.chunked = true
    @resp.chunked = true
  else
    @cgroup.chunked = false
    @resp.chunked = false
  end
  
  @page_path = @handler.page_path
  @ext = File.extname(@page_path).downcase[1..-1].to_s
  
  @ctype = @types[@ext.to_sym] if @ext.length > 0 and @types.key?(@ext.to_sym)
  @ctype = @config[:default_filetype] if !@ctype and @config.key?(:default_filetype)
  @resp.header("Content-Type", @ctype)
  
  @browser = Knj::Web.browser(@meta)
  
  if @meta["HTTP_X_FORWARDED_FOR"]
    @ip = @meta["HTTP_X_FORWARDED_FOR"].split(",")[0].strip
  elsif @meta["REMOTE_ADDR"]
    @ip = @meta["REMOTE_ADDR"]
  else
    raise "Could not figure out the IP of the session."
  end
  
  STDOUT.print "Figuring out session-ID, session-object and more.\n" if @debug
  if @cookie["KnjappserverSession"].to_s.length > 0
    @session_id = @cookie["KnjappserverSession"]
  elsif @browser["browser"] == "bot"
    @session_id = "bot"
  else
    @session_id = @kas.session_generate_id(@meta)
    send_cookie = true
  end
  
  begin
    @session, @session_hash = @kas.session_fromid(@ip, @session_id, @meta)
  rescue ArgumentError => e
    #User should not have the session he asked for because of invalid user-agent or invalid IP.
    @session_id = @kas.session_generate_id(@meta)
    @session, @session_hash = @kas.session_fromid(@ip, @session_id, @meta)
    send_cookie = true
  end
  
  if send_cookie
    @resp.cookie(
      "name" => "KnjappserverSession",
      "value" => @session_id,
      "path" => "/",
      "expires" => Time.now + 32140800 #add around 12 months
    )
  end
  
  if @config.key?(:logging) and @config[:logging][:access_db]
    STDOUT.print "Doing access-logging.\n" if @debug
    @ips = [@meta["REMOTE_ADDR"]]
    @ips << @meta["HTTP_X_FORWARDED_FOR"].split(",")[0].strip if @meta["HTTP_X_FORWARDED_FOR"]
    @kas.logs_access_pending << {
      :session_id => @session.id,
      :date_request => Time.now,
      :ips => @ips,
      :get => @get,
      :post => @post,
      :meta => @meta,
      :cookie => @cookie
    }
  end
  
  STDOUT.print "Initializing thread and content-group.\n" if @debug
  self.init_thread
  Thread.current[:knjappserver][:contentgroup] = @cgroup
  time_start = Time.now.to_f if @debug
  
  begin
    @kas.events.call(:request_begin, :httpsession => self) if @kas.events
    
    Timeout.timeout(@kas.config[:timeout]) do
      if @handlers_cache.key?(@ext)
        STDOUT.print "Calling handler.\n" if @debug
        @handlers_cache[@ext].call(self)
      else
        #check if we should use a handler for this request.
        @config[:handlers].each do |handler_info|
          if handler_info.key?(:file_ext) and handler_info[:file_ext] == @ext
            return handler_info[:callback].call(self)
          elsif handler_info.key?(:path) and handler_info[:mount] and @meta["SCRIPT_NAME"].slice(0, handler_info[:path].length) == handler_info[:path]
            @page_path = "#{handler_info[:mount]}#{@meta["SCRIPT_NAME"].slice(handler_info[:path].length, @meta["SCRIPT_NAME"].length)}"
            break
          end
        end
        
        if !File.exists?(@page_path)
          @resp.status = 404
          @resp.header("Content-Type", "text/html")
          @cgroup.write("File you are looking for was not found: '#{@meta["REQUEST_URI"]}'.")
        else
          if @headers["cache-control"] and @headers["cache-control"][0]
            cache_control = {}
            @headers["cache-control"][0].scan(/(.+)=(.+)/) do |match|
              cache_control[match[1]] = match[2]
            end
          end
          
          cache_dont = true if cache_control and cache_control.key?("max-age") and cache_control["max-age"].to_i <= 0
          lastmod = File.mtime(@page_path)
          
          @resp.header("Last-Modified", lastmod.httpdate)
          @resp.header("Expires", (Time.now + 86400).httpdate) #next day.
          
          if !cache_dont and @headers["if-modified-since"] and @headers["if-modified-since"][0]
            request_mod = Datet.in(@headers["if-modified-since"].first).time
            
            if request_mod == lastmod
              @resp.status = 304
              return nil
            end
          end
          
          @cgroup.new_io(:type => :file, :path => @page_path)
        end
      end
    end
  rescue SystemExit
    #do nothing - ignore.
  rescue Timeout::Error
    @resp.status = 500
    print "The request timed out."
  end
  
  @cgroup.mark_done
  @cgroup.write_output
  STDOUT.print "#{__id__} - Served '#{@meta["REQUEST_URI"]}' in #{Time.now.to_f - time_start} secs (#{@resp.status}).\n" if @debug
  @cgroup.join
  
  @kas.events.call(:request_done, {
    :httpsession => self
  }) if @kas.events
  @httpsession_var = {}
end

#thread_request_run ⇒ Object 



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# File 'lib/include/class_httpsession.rb', line 62

def thread_request_run
  Thread.current[:knjappserver] = {} if !Thread.current[:knjappserver]
  Thread.current[:type] = :httpsession
  
  if @config.key?(:max_requests_working)
    max_requests_working = @config[:max_requests_working].to_i
  else
    max_requests_working = false
  end
  
  begin
    while @active
      begin
        @cgroup.reset
        @written_size = 0
        @size_send = @config[:size_send]
        @alert_sent = false
        @working = false
        break if @kas.should_restart
        
        STDOUT.print "#{__id__} - Waiting to parse from socket.\n" if @debug
        Timeout.timeout(1800) do
          @handler.socket_parse(@socket)
        end
        
        STDOUT.print "#{__id__} - Done parsing from socket.\n" if @debug
        
        while @kas.paused? #Check if we should be waiting with executing the pending request.
          STDOUT.print "#{__id__} - Paused! (#{@kas.paused}) - sleeping.\n" if @debug
          sleep 0.1
        end
        
        break if @kas.should_restart
        
        if max_requests_working and @httpserver
          while @httpserver.working_count.to_i >= max_requests_working
            STDOUT.print "#{__id__} - Maximum amounts of requests are working (#{@httpserver.working_count}, #{max_requests_working}) - sleeping.\n" if @debug
            sleep 0.1
          end
        end
        
        #Reserve database connections.
        @kas.db_handler.get_and_register_thread if @kas.db_handler.opts[:threadsafe]
        @kas.ob.db.get_and_register_thread if @kas.ob.db.opts[:threadsafe]
        
        @working = true
        STDOUT.print "#{__id__} - Serving.\n" if @debug
        
        @httpserver.count_block do
          self.serve
        end
      ensure
        STDOUT.print "#{__id__} - Closing request.\n" if @debug
        @working = false
        
        #Free reserved database-connections.
        @kas.db_handler.free_thread if @kas and @kas.db_handler.opts[:threadsafe]
        @kas.ob.db.free_thread if @kas and @kas.ob.db.opts[:threadsafe]
      end
    end
  rescue Timeout::Error
    STDOUT.print "#{__id__} - Closing httpsession because of timeout.\n" if @debug
  rescue Errno::ECONNRESET, Errno::ENOTCONN, Errno::EPIPE => e
    STDOUT.print "#{__id__} - Connection error (#{e.inspect})...\n" if @debug
  rescue Interrupt => e
    raise e
  rescue Exception => e
    STDOUT.puts Knj::Errors.error_str(e)
  ensure
    self.destruct
  end
end

#threadded_content(block) ⇒ Object 



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# File 'lib/include/class_httpsession.rb', line 147

def threadded_content(block)
  raise "No block was given." if !block
  cgroup = Thread.current[:knjappserver][:contentgroup].new_thread
  
  Thread.new do
    begin
      self.init_thread
      cgroup.register_thread
      
      @kas.db_handler.get_and_register_thread if @kas and @kas.db_handler.opts[:threadsafe]
      @kas.ob.db.get_and_register_thread if @kas and @kas.ob.db.opts[:threadsafe]
      
      block.call
    rescue Exception => e
      Thread.current[:knjappserver][:contentgroup].write Knj::Errors.error_str(e, {:html => true})
      _kas.handle_error(e)
    ensure
      Thread.current[:knjappserver][:contentgroup].mark_done
      @kas.ob.db.free_thread if @kas and @kas.ob.db.opts[:threadsafe]
      @kas.db_handler.free_thread if @kas and @kas.db_handler.opts[:threadsafe]
    end
  end
end