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|
=begin
= net/http.rb
maintained by Minero Aoki <aamine@dp.u-netsurf.ne.jp>
This file is derived from http-access.rb
=end
require 'net/session'
module Net
class HTTPError < ProtocolError; end
class HTTPBadResponse < HTTPError; end
class HTTPSession < Session
Version = '1.1.0'
session_setvar :port, '80'
session_setvar :command_type, 'HTTPCommand'
def get( path = '/', header = nil, ret = '' )
confirm_connection
@proto.get path, header, ret
end
def head( path = '/', header = nil )
confirm_connection
@proto.head path, header
end
private
def confirm_connection
if @socket.closed? then
@socket.reopen
end
end
end
HTTP = HTTPSession
class HTTPCommand < Command
HTTPVersion = '1.1'
def initialize( sock )
@http_version = HTTPVersion
@in_header = {}
@in_header[ 'Host' ] = sock.addr
#@in_header[ 'User-Agent' ] = "Ruby http version #{HTTPSession::Version}"
#@in_header[ 'Connection' ] = 'Keep-Alive'
#@in_header[ 'Accept' ] = '*/*'
super sock
end
attr :http_version
def get( path, u_header = nil, ret = '' )
@socket.writeline sprintf( 'GET %s HTTP/%s', path, HTTPVersion )
write_header u_header
check_reply SuccessCode
header = read_header
@socket.read content_length( header ), ret
@socket.close unless keep_alive? header
return header, ret
end
def head( path, u_header = nil )
@socket.writeline sprintf( 'HEAD %s HTTP/%s', path, HTTPVersion )
write_header u_header
check_reply SuccessCode
header = read_header
@socket.close unless keep_alive? header
header
end
# def put
# def delete
# def trace
# def options
private
def do_quit
unless @socket.closed? then
head '/', { 'Connection' => 'Close' }
end
end
def get_reply
str = @socket.readline
/\AHTTP\/(\d+\.\d+)?\s+(\d\d\d)\s+(.*)\z/i === str
@http_version = $1
status = $2
discrip = $3
klass = case status[0]
when ?1 then
case status[2]
when ?0 then ContinueCode
when ?1 then SuccessCode
else UnknownCode
end
when ?2 then SuccessCode
when ?3 then RetryCode
when ?4 then ServerBusyCode
when ?5 then FatalErrorCode
else UnknownCode
end
klass.new( status, discrip )
end
def content_length( header )
unless str = header[ 'content-length' ] then
raise HTTPBadResponce, "content-length not given"
end
unless /content-length:\s*(\d+)/i === str then
raise HTTPBadResponce, "content-length format error"
end
$1.to_i
end
def keep_alive?( header )
if str = header[ 'connection' ] then
if /connection:\s*keep-alive/i === str then
return true
end
else
if @http_version == '1.1' then
return true
end
end
false
end
def read_header
header = {}
while true do
line = @socket.readline
break if line.empty?
/\A[^:]+/ === line
nm = $&
nm.strip!
nm.downcase!
header[ nm ] = line
end
header
end
def write_header( user )
if user then
header = @in_header.dup.update user
else
header = @in_header
end
header.each do |n,v|
@socket.writeline n + ': ' + v
end
@socket.writeline ''
if tmp = header['Connection'] then
/close/i === tmp
else
false
end
end
end
end # module Net
|