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Edit File : httpresponse.rb \| Size : 10.63 KB
# # httpresponse.rb -- HTTPResponse Class # # Author: IPR -- Internet Programming with Ruby -- writers # Copyright (c) 2000, 2001 TAKAHASHI Masayoshi, GOTOU Yuuzou # Copyright (c) 2002 Internet Programming with Ruby writers. All rights # reserved. # # $IPR: httpresponse.rb,v 1.45 2003/07/11 11:02:25 gotoyuzo Exp $ require 'time' require 'webrick/httpversion' require 'webrick/htmlutils' require 'webrick/httputils' require 'webrick/httpstatus' module WEBrick ## # An HTTP response. This is filled in by the service or do_* methods of a # WEBrick HTTP Servlet. class HTTPResponse ## # HTTP Response version attr_reader :http_version ## # Response status code (200) attr_reader :status ## # Response header attr_reader :header ## # Response cookies attr_reader :cookies ## # Response reason phrase ("OK") attr_accessor :reason_phrase ## # Body may be a String or IO-like object that responds to #read and # #readpartial. attr_accessor :body ## # Request method for this response attr_accessor :request_method ## # Request URI for this response attr_accessor :request_uri ## # Request HTTP version for this response attr_accessor :request_http_version ## # Filename of the static file in this response. Only used by the # FileHandler servlet. attr_accessor :filename ## # Is this a keep-alive response? attr_accessor :keep_alive ## # Configuration for this response attr_reader :config ## # Bytes sent in this response attr_reader :sent_size ## # Creates a new HTTP response object. WEBrick::Config::HTTP is the # default configuration. def initialize(config) @config = config @buffer_size = config[:OutputBufferSize] @logger = config[:Logger] @header = Hash.new @status = HTTPStatus::RC_OK @reason_phrase = nil @http_version = HTTPVersion::convert(@config[:HTTPVersion]) @body = '' @keep_alive = true @cookies = [] @request_method = nil @request_uri = nil @request_http_version = @http_version # temporary @chunked = false @filename = nil @sent_size = 0 end ## # The response's HTTP status line def status_line "HTTP/#@http_version #@status #@reason_phrase #{CRLF}" end ## # Sets the response's status to the +status+ code def status=(status) @status = status @reason_phrase = HTTPStatus::reason_phrase(status) end ## # Retrieves the response header +field+ def [](field) @header[field.downcase] end ## # Sets the response header +field+ to +value+ def []=(field, value) @header[field.downcase] = value.to_s end ## # The content-length header def content_length if len = self['content-length'] return Integer(len) end end ## # Sets the content-length header to +len+ def content_length=(len) self['content-length'] = len.to_s end ## # The content-type header def content_type self['content-type'] end ## # Sets the content-type header to +type+ def content_type=(type) self['content-type'] = type end ## # Iterates over each header in the response def each @header.each{\|field, value\| yield(field, value) } end ## # Will this response body be returned using chunked transfer-encoding? def chunked? @chunked end ## # Enables chunked transfer encoding. def chunked=(val) @chunked = val ? true : false end ## # Will this response's connection be kept alive? def keep_alive? @keep_alive end ## # Sends the response on +socket+ def send_response(socket) # :nodoc: begin setup_header() send_header(socket) send_body(socket) rescue Errno::EPIPE, Errno::ECONNRESET, Errno::ENOTCONN => ex @logger.debug(ex) @keep_alive = false rescue Exception => ex @logger.error(ex) @keep_alive = false end end ## # Sets up the headers for sending def setup_header() # :nodoc: @reason_phrase \|\|= HTTPStatus::reason_phrase(@status) @header['server'] \|\|= @config[:ServerSoftware] @header['date'] \|\|= Time.now.httpdate # HTTP/0.9 features if @request_http_version < "1.0" @http_version = HTTPVersion.new("0.9") @keep_alive = false end # HTTP/1.0 features if @request_http_version < "1.1" if chunked? @chunked = false ver = @request_http_version.to_s msg = "chunked is set for an HTTP/#{ver} request. (ignored)" @logger.warn(msg) end end # Determine the message length (RFC2616 -- 4.4 Message Length) if @status == 304 \|\| @status == 204 \|\| HTTPStatus::info?(@status) @header.delete('content-length') @body = "" elsif chunked? @header["transfer-encoding"] = "chunked" @header.delete('content-length') elsif %r{^multipart/byteranges} =~ @header['content-type'] @header.delete('content-length') elsif @header['content-length'].nil? unless @body.is_a?(IO) @header['content-length'] = @body ? @body.bytesize : 0 end end # Keep-Alive connection. if @header['connection'] == "close" @keep_alive = false elsif keep_alive? if chunked? \|\| @header['content-length'] \|\| @status == 304 \|\| @status == 204 \|\| HTTPStatus.info?(@status) @header['connection'] = "Keep-Alive" else msg = "Could not determine content-length of response body. Set content-length of the response or set Response#chunked = true" @logger.warn(msg) @header['connection'] = "close" @keep_alive = false end else @header['connection'] = "close" end # Location is a single absoluteURI. if location = @header['location'] if @request_uri @header['location'] = @request_uri.merge(location) end end end ## # Sends the headers on +socket+ def send_header(socket) # :nodoc: if @http_version.major > 0 data = status_line() @header.each{\|key, value\| tmp = key.gsub(/\bwww\|^te$\|\b\w/){ $&.upcase } data << "#{tmp}: #{value}" << CRLF } @cookies.each{\|cookie\| data << "Set-Cookie: " << cookie.to_s << CRLF } data << CRLF _write_data(socket, data) end end ## # Sends the body on +socket+ def send_body(socket) # :nodoc: if @body.respond_to? :readpartial then send_body_io(socket) else send_body_string(socket) end end def to_s # :nodoc: ret = "" send_response(ret) ret end ## # Redirects to +url+ with a WEBrick::HTTPStatus::Redirect +status+. # # Example: # # res.set_redirect WEBrick::HTTPStatus::TemporaryRedirect def set_redirect(status, url) @body = "<HTML><A HREF=\"#{url.to_s}\">#{url.to_s}</A>.</HTML>\n" @header['location'] = url.to_s raise status end ## # Creates an error page for exception +ex+ with an optional +backtrace+ def set_error(ex, backtrace=false) case ex when HTTPStatus::Status @keep_alive = false if HTTPStatus::error?(ex.code) self.status = ex.code else @keep_alive = false self.status = HTTPStatus::RC_INTERNAL_SERVER_ERROR end @header['content-type'] = "text/html; charset=ISO-8859-1" if respond_to?(:create_error_page) create_error_page() return end if @request_uri host, port = @request_uri.host, @request_uri.port else host, port = @config[:ServerName], @config[:Port] end @body = '' @body << <<-_end_of_html_ <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN"> <HTML> <HEAD><TITLE>#{HTMLUtils::escape(@reason_phrase)}</TITLE></HEAD> <BODY> <H1>#{HTMLUtils::escape(@reason_phrase)}</H1> #{HTMLUtils::escape(ex.message)} <HR> _end_of_html_ if backtrace && $DEBUG @body << "backtrace of `#{HTMLUtils::escape(ex.class.to_s)}' " @body << "#{HTMLUtils::escape(ex.message)}" @body << "<PRE>" ex.backtrace.each{\|line\| @body << "\t#{line}\n"} @body << "</PRE><HR>" end @body << <<-_end_of_html_ <ADDRESS> #{HTMLUtils::escape(@config[:ServerSoftware])} at #{host}:#{port} </ADDRESS> </BODY> </HTML> _end_of_html_ end private # :stopdoc: def send_body_io(socket) begin if @request_method == "HEAD" # do nothing elsif chunked? begin buf = '' data = '' while true @body.readpartial( @buffer_size, buf ) # there is no need to clear buf? data << format("%x", buf.bytesize) << CRLF data << buf << CRLF _write_data(socket, data) data.clear @sent_size += buf.bytesize end rescue EOFError # do nothing end _write_data(socket, "0#{CRLF}#{CRLF}") else size = @header['content-length'].to_i _send_file(socket, @body, 0, size) @sent_size = size end ensure @body.close end end def send_body_string(socket) if @request_method == "HEAD" # do nothing elsif chunked? body ? @body.bytesize : 0 while buf = @body[@sent_size, @buffer_size] break if buf.empty? data = "" data << format("%x", buf.bytesize) << CRLF data << buf << CRLF _write_data(socket, data) @sent_size += buf.bytesize end _write_data(socket, "0#{CRLF}#{CRLF}") else if @body && @body.bytesize > 0 _write_data(socket, @body) @sent_size = @body.bytesize end end end def _send_file(output, input, offset, size) while offset > 0 sz = @buffer_size < size ? @buffer_size : size buf = input.read(sz) offset -= buf.bytesize end if size == 0 while buf = input.read(@buffer_size) _write_data(output, buf) end else while size > 0 sz = @buffer_size < size ? @buffer_size : size buf = input.read(sz) _write_data(output, buf) size -= buf.bytesize end end end def _write_data(socket, data) socket << data end # :startdoc: end end Back

Edit File : httpresponse.rb | Size : 10.63 KB

#
# httpresponse.rb -- HTTPResponse Class
#
# Author: IPR -- Internet Programming with Ruby -- writers
# Copyright (c) 2000, 2001 TAKAHASHI Masayoshi, GOTOU Yuuzou
# Copyright (c) 2002 Internet Programming with Ruby writers. All rights
# reserved.
#
# $IPR: httpresponse.rb,v 1.45 2003/07/11 11:02:25 gotoyuzo Exp $

require 'time'
require 'webrick/httpversion'
require 'webrick/htmlutils'
require 'webrick/httputils'
require 'webrick/httpstatus'

module WEBrick
  ##
  # An HTTP response.  This is filled in by the service or do_* methods of a
  # WEBrick HTTP Servlet.

class HTTPResponse

##
    # HTTP Response version

attr_reader :http_version

##
    # Response status code (200)

attr_reader :status

##
    # Response header

attr_reader :header

##
    # Response cookies

attr_reader :cookies

##
    # Response reason phrase ("OK")

attr_accessor :reason_phrase

##
    # Body may be a String or IO-like object that responds to #read and
    # #readpartial.

attr_accessor :body

##
    # Request method for this response

attr_accessor :request_method

##
    # Request URI for this response

attr_accessor :request_uri

##
    # Request HTTP version for this response

attr_accessor :request_http_version

##
    # Filename of the static file in this response.  Only used by the
    # FileHandler servlet.

attr_accessor :filename

##
    # Is this a keep-alive response?

attr_accessor :keep_alive

##
    # Configuration for this response

attr_reader :config

##
    # Bytes sent in this response

attr_reader :sent_size

##
    # Creates a new HTTP response object.  WEBrick::Config::HTTP is the
    # default configuration.

def initialize(config)
      @config = config
      @buffer_size = config[:OutputBufferSize]
      @logger = config[:Logger]
      @header = Hash.new
      @status = HTTPStatus::RC_OK
      @reason_phrase = nil
      @http_version = HTTPVersion::convert(@config[:HTTPVersion])
      @body = ''
      @keep_alive = true
      @cookies = []
      @request_method = nil
      @request_uri = nil
      @request_http_version = @http_version  # temporary
      @chunked = false
      @filename = nil
      @sent_size = 0
    end

##
    # The response's HTTP status line

def status_line
      "HTTP/#@http_version #@status #@reason_phrase #{CRLF}"
    end

##
    # Sets the response's status to the +status+ code

def status=(status)
      @status = status
      @reason_phrase = HTTPStatus::reason_phrase(status)
    end

##
    # Retrieves the response header +field+

def [](field)
      @header[field.downcase]
    end

##
    # Sets the response header +field+ to +value+

def []=(field, value)
      @header[field.downcase] = value.to_s
    end

##
    # The content-length header

def content_length
      if len = self['content-length']
        return Integer(len)
      end
    end

##
    # Sets the content-length header to +len+

def content_length=(len)
      self['content-length'] = len.to_s
    end

##
    # The content-type header

def content_type
      self['content-type']
    end

##
    # Sets the content-type header to +type+

def content_type=(type)
      self['content-type'] = type
    end

##
    # Iterates over each header in the response

def each
      @header.each{|field, value|  yield(field, value) }
    end

##
    # Will this response body be returned using chunked transfer-encoding?

def chunked?
      @chunked
    end

##
    # Enables chunked transfer encoding.

def chunked=(val)
      @chunked = val ? true : false
    end

##
    # Will this response's connection be kept alive?

def keep_alive?
      @keep_alive
    end

##
    # Sends the response on +socket+

def send_response(socket) # :nodoc:
      begin
        setup_header()
        send_header(socket)
        send_body(socket)
      rescue Errno::EPIPE, Errno::ECONNRESET, Errno::ENOTCONN => ex
        @logger.debug(ex)
        @keep_alive = false
      rescue Exception => ex
        @logger.error(ex)
        @keep_alive = false
      end
    end

##
    # Sets up the headers for sending

def setup_header() # :nodoc:
      @reason_phrase    ||= HTTPStatus::reason_phrase(@status)
      @header['server'] ||= @config[:ServerSoftware]
      @header['date']   ||= Time.now.httpdate

# HTTP/0.9 features
      if @request_http_version < "1.0"
        @http_version = HTTPVersion.new("0.9")
        @keep_alive = false
      end

# HTTP/1.0 features
      if @request_http_version < "1.1"
        if chunked?
          @chunked = false
          ver = @request_http_version.to_s
          msg = "chunked is set for an HTTP/#{ver} request. (ignored)"
          @logger.warn(msg)
        end
      end

# Determine the message length (RFC2616 -- 4.4 Message Length)
      if @status == 304 || @status == 204 || HTTPStatus::info?(@status)
        @header.delete('content-length')
        @body = ""
      elsif chunked?
        @header["transfer-encoding"] = "chunked"
        @header.delete('content-length')
      elsif %r{^multipart/byteranges} =~ @header['content-type']
        @header.delete('content-length')
      elsif @header['content-length'].nil?
        unless @body.is_a?(IO)
          @header['content-length'] = @body ? @body.bytesize : 0
        end
      end

# Keep-Alive connection.
      if @header['connection'] == "close"
         @keep_alive = false
      elsif keep_alive?
        if chunked? || @header['content-length'] || @status == 304 || @status == 204 || HTTPStatus.info?(@status)
          @header['connection'] = "Keep-Alive"
        else
          msg = "Could not determine content-length of response body. Set content-length of the response or set Response#chunked = true"
          @logger.warn(msg)
          @header['connection'] = "close"
          @keep_alive = false
        end
      else
        @header['connection'] = "close"
      end

# Location is a single absoluteURI.
      if location = @header['location']
        if @request_uri
          @header['location'] = @request_uri.merge(location)
        end
      end
    end

##
    # Sends the headers on +socket+

def send_header(socket) # :nodoc:
      if @http_version.major > 0
        data = status_line()
        @header.each{|key, value|
          tmp = key.gsub(/\bwww|^te$|\b\w/){ $&.upcase }
          data << "#{tmp}: #{value}" << CRLF
        }
        @cookies.each{|cookie|
          data << "Set-Cookie: " << cookie.to_s << CRLF
        }
        data << CRLF
        _write_data(socket, data)
      end
    end

##
    # Sends the body on +socket+

def send_body(socket) # :nodoc:
      if @body.respond_to? :readpartial then
        send_body_io(socket)
      else
        send_body_string(socket)
      end
    end

def to_s # :nodoc:
      ret = ""
      send_response(ret)
      ret
    end

##
    # Redirects to +url+ with a WEBrick::HTTPStatus::Redirect +status+.
    #
    # Example:
    #
    #   res.set_redirect WEBrick::HTTPStatus::TemporaryRedirect

def set_redirect(status, url)
      @body = "<HTML><A HREF=\"#{url.to_s}\">#{url.to_s}</A>.</HTML>\n"
      @header['location'] = url.to_s
      raise status
    end

##
    # Creates an error page for exception +ex+ with an optional +backtrace+

def set_error(ex, backtrace=false)
      case ex
      when HTTPStatus::Status
        @keep_alive = false if HTTPStatus::error?(ex.code)
        self.status = ex.code
      else
        @keep_alive = false
        self.status = HTTPStatus::RC_INTERNAL_SERVER_ERROR
      end
      @header['content-type'] = "text/html; charset=ISO-8859-1"

if respond_to?(:create_error_page)
        create_error_page()
        return
      end

if @request_uri
        host, port = @request_uri.host, @request_uri.port
      else
        host, port = @config[:ServerName], @config[:Port]
      end

@body = ''
      @body << <<-_end_of_html_
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN">
<HTML>
  <HEAD><TITLE>#{HTMLUtils::escape(@reason_phrase)}</TITLE></HEAD>
  <BODY>
    <H1>#{HTMLUtils::escape(@reason_phrase)}</H1>
    #{HTMLUtils::escape(ex.message)}
    <HR>
      _end_of_html_

if backtrace && $DEBUG
        @body << "backtrace of `#{HTMLUtils::escape(ex.class.to_s)}' "
        @body << "#{HTMLUtils::escape(ex.message)}"
        @body << "<PRE>"
        ex.backtrace.each{|line| @body << "\t#{line}\n"}
        @body << "</PRE><HR>"
      end

@body << <<-_end_of_html_
    <ADDRESS>
     #{HTMLUtils::escape(@config[:ServerSoftware])} at
     #{host}:#{port}
    </ADDRESS>
  </BODY>
</HTML>
      _end_of_html_
    end

private

# :stopdoc:

def send_body_io(socket)
      begin
        if @request_method == "HEAD"
          # do nothing
        elsif chunked?
          begin
            buf  = ''
            data = ''
            while true
              @body.readpartial( @buffer_size, buf ) # there is no need to clear buf?
              data << format("%x", buf.bytesize) << CRLF
              data << buf << CRLF
              _write_data(socket, data)
              data.clear
              @sent_size += buf.bytesize
            end
          rescue EOFError # do nothing
          end
          _write_data(socket, "0#{CRLF}#{CRLF}")
        else
          size = @header['content-length'].to_i
          _send_file(socket, @body, 0, size)
          @sent_size = size
        end
      ensure
        @body.close
      end
    end

def send_body_string(socket)
      if @request_method == "HEAD"
        # do nothing
      elsif chunked?
        body ? @body.bytesize : 0
        while buf = @body[@sent_size, @buffer_size]
          break if buf.empty?
          data = ""
          data << format("%x", buf.bytesize) << CRLF
          data << buf << CRLF
          _write_data(socket, data)
          @sent_size += buf.bytesize
        end
        _write_data(socket, "0#{CRLF}#{CRLF}")
      else
        if @body && @body.bytesize > 0
          _write_data(socket, @body)
          @sent_size = @body.bytesize
        end
      end
    end

def _send_file(output, input, offset, size)
      while offset > 0
        sz = @buffer_size < size ? @buffer_size : size
        buf = input.read(sz)
        offset -= buf.bytesize
      end

if size == 0
        while buf = input.read(@buffer_size)
          _write_data(output, buf)
        end
      else
        while size > 0
          sz = @buffer_size < size ? @buffer_size : size
          buf = input.read(sz)
          _write_data(output, buf)
          size -= buf.bytesize
        end
      end
    end

def _write_data(socket, data)
      socket << data
    end

# :startdoc:
  end

end

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