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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".
This library is distributed under the terms of the Ruby license.
You can freely distribute/modify this library.
=end
require 'net/protocol'
module Net
class HTTPError < ProtocolError; end
class HTTPBadResponse < HTTPError; end
=begin
= class HTTP
== Class Methods
: new( address, port = 80 )
create new HTTP object.
: port
returns HTTP default port, 80
: command_type
returns Command class, HTTPCommand
== Methods
: get( path, header = nil, dest = '' )
: get( path, header = nil ) {|str| .... }
get data from "path" on connecting host.
"header" must be a Hash like { 'Accept' => '*/*', ... }.
Data is written to "dest" by using "<<" method.
This method returns response header (Hash) and "dest".
If called as iterator, give a part String of entity body.
: head( path, header = nil )
get only header from "path" on connecting host.
"header" is a Hash like { 'Accept' => '*/*', ... }.
This method returns header as a Hash like
{ 'content-length' => 'Content-Length: 2554',
'content-type' => 'Content-Type: text/html',
... }
: post( path, data, header = nil, dest = '' )
: post( path, data, header = nil ) {|str| .... }
post "data"(must be String now) to "path" (and get entity body).
"header" must be a Hash like { 'Accept' => '*/*', ... }.
Data is written to "dest" by using "<<" method.
This method returns response header (Hash) and "dest".
If called as iterator, give a part String of entity body.
ATTENTION: entity body could be empty
: get2( path, header = nil )
send GET request for "path".
"header" must be a Hash like { 'Accept' => '*/*', ... }.
This method returns response header (Hash).
: get_body( dest = '' )
: get_body {|str| .... }
gets entity body of forwarded 'get2' or 'post2' methods.
Data is written in "dest" by using "<<" method.
This method returns "dest".
If called as iterator, give a part String of entity body.
=end
class HTTP < Protocol
protocol_param :port, '80'
protocol_param :command_type, '::Net::HTTPCommand'
def get( path, u_header = nil, dest = nil, &block )
u_header ||= {}
if block then
dest = ReadAdapter.new( block )
ret = nil
else
dest = ret = ''
end
resp = nil
connecting( u_header ) {
@command.get edit_path(path), u_header
resp = @command.get_response
@command.try_get_body( resp, dest )
}
return resp['http-header'], ret
end
def get2( path, u_header = {} )
only_header( :get, path, u_header )
end
def get_body( dest = '', &block )
if block then
dest = ReadAdapter.new( block )
end
@command.try_get_body @response, dest
ensure_termination @u_header
dest
end
def head( path, u_header = {} )
ret = only_header( :head, path, u_header )['http-header']
ensure_termination u_header
ret
end
def post( path, data, u_header = nil, dest = nil, &block )
u_header ||= {}
if block then
dest = ReadAdapter.new( block )
ret = nil
else
dest = ret = ''
end
resp = nil
connecting( u_header, true ) {
@command.post path, u_header, data
resp = @command.get_response
@command.try_get_body( resp, dest )
}
return resp['http-header'], ret
end
def post2( path, data, u_header = {} )
only_header :post, path, u_header, data
end
# not tested because I could not setup apache (__;;;
def put( path, src = nil, u_header = {}, &block )
u_header ||= u_header
connecting( u_header, true ) {
@command.put path, u_header, src, dest
}
header
end
private
def only_header( mid, path, u_header, data = nil )
@u_header = u_header ? procheader(u_header) : {}
@response = nil
ensure_connection @u_header
if data then
@command.send mid, edit_path(path), @u_header, data
else
@command.send mid, edit_path(path), @u_header
end
@response = @command.get_response
@response['http-header']
end
# called when connecting
def do_finish
unless @socket.closed? then
begin
@command.head '/', { 'Connection' => 'Close' }
rescue EOFError
end
end
end
def connecting( u_header, putp = false )
u_header = procheader( u_header )
ensure_connection u_header
yield
ensure_termination u_header
end
def ensure_connection( u_header )
if not @socket then
u_header['Connection'] = 'Close'
start
elsif @socket.closed? then
@socket.reopen
end
end
def ensure_termination( u_header )
unless keep_alive? u_header then
@socket.close
end
@u_header = @response = nil
end
def keep_alive?( header )
if str = header['Connection'] then
if /\A\s*keep-alive/i === str then
return true
end
else
if @command.http_version == '1.1' then
return true
end
end
false
end
def procheader( h )
new = {}
h.each do |k,v|
arr = k.split('-')
arr.each{|i| i.capitalize! }
new[ arr.join('-') ] = v
end
end
def edit_path( path )
path
end
class << self
def Proxy( p_addr, p_port )
klass = super
klass.module_eval %-
def edit_path( path )
'http://' + address +
(@port == #{self.port} ? '' : ':' + @port.to_s) + path
end
-
klass
end
end
end
HTTPSession = HTTP
class HTTPSuccessCode < SuccessCode; end
class HTTPCreatedCode < SuccessCode; end
class HTTPAcceptedCode < SuccessCode; end
class HTTPNoContentCode < SuccessCode; end
class HTTPResetContentCode < SuccessCode; end
class HTTPPartialContentCode < SuccessCode; end
class HTTPMultipleChoiceCode < RetryCode; end
class HTTPMovedPermanentlyCode < RetryCode; end
class HTTPMovedTemporarilyCode < RetryCode; end
class HTTPNotModifiedCode < RetryCode; end
class HTTPUseProxyCode < RetryCode; end
class HTTPCommand < Command
HTTPVersion = '1.1'
def initialize( sock )
@http_version = HTTPVersion
@in_header = {}
@in_header[ 'Host' ] = sock.addr
@in_header[ 'Connection' ] = 'Keep-Alive'
@in_header[ 'Accept' ] = '*/*'
super sock
end
attr_reader :http_version
def get( path, u_header )
request sprintf('GET %s HTTP/%s', path, HTTPVersion), u_header
end
def head( path, u_header )
request sprintf('HEAD %s HTTP/%s', path, HTTPVersion), u_header
end
def post( path, u_header, data )
request sprintf('POST %s HTTP/%s', path, HTTPVersion), u_header
@socket.write data
end
def put( path, u_header, src )
request sprintf('PUT %s HTTP/%s', path, HTTPVersion), u_header
@socket.write_bin src
end
# def delete
# def trace
# def options
def get_response
rep = get_reply
rep = get_reply while ContinueCode === rep
header = {}
while true do
line = @socket.readline
break if line.empty?
nm = /\A[^:]+/.match( line )[0].strip.downcase
header[nm] = line
end
rep['http-header'] = header
reply_must rep, SuccessCode
rep
end
def get_body( rep, dest )
header = rep['http-header']
if chunked? header then
read_chunked( dest, header )
else
if clen = content_length( header ) then
@socket.read clen, dest
else
###
### "multipart/bytelenges" check should be done here ...
###
@socket.read_all dest
end
end
end
def try_get_body( rep, dest )
rep = get_reply while ContinueCode === rep
return nil unless rep['body-exist']
get_body rep, dest
end
private
def request( req, u_header )
@socket.writeline req
if u_header then
header = @in_header.dup.update( u_header )
else
header = @in_header
end
header.each do |n,v|
@socket.writeline n + ': ' + v
end
@socket.writeline ''
end
def get_reply
str = @socket.readline
unless /\AHTTP\/(\d+\.\d+)?\s+(\d\d\d)\s*(.*)\z/i === str then
raise HTTPBadResponse, "wrong status line format: #{str}"
end
@http_version = $1
status = $2
discrip = $3
be = false
klass = case status[0]
when ?1 then
case status[2]
when ?0 then ContinueCode
when ?1 then HTTPSuccessCode
else UnknownCode
end
when ?2 then
case status[2]
when ?0 then be = true; HTTPSuccessCode
when ?1 then be = false; HTTPSuccessCode
when ?2 then be = true; HTTPSuccessCode
when ?3 then be = true; HTTPSuccessCode
when ?4 then be = false; HTTPNoContentCode
when ?5 then be = false; HTTPResetContentCode
when ?6 then be = true; HTTPPartialContentCode
else UnknownCode
end
when ?3 then
case status[2]
when ?0 then be = true; HTTPMultipleChoiceCode
when ?1 then be = true; HTTPMovedPermanentryCode
when ?2 then be = true; HTTPMovedTemporarilyCode
when ?3 then be = true; HTTPMovedPermanentryCode
when ?4 then be = false; HTTPNotModifiedCode
when ?5 then be = false; HTTPUseProxyCode
else UnknownCode
end
when ?4 then ServerBusyCode
when ?5 then FatalErrorCode
else UnknownCode
end
code = klass.new( status, discrip )
code['body-exist'] = be
code
end
def read_chunked( ret, header )
line = nil
len = nil
total = 0
while true do
line = @socket.readline
unless /[0-9a-hA-H]+/ === line then
raise HTTPBadResponse, "chunk size not given"
end
len = $&.hex
break if len == 0
@socket.read( len, ret ); total += len
@socket.read 2 # \r\n
end
while true do
line = @socket.readline
break if line.empty?
end
header.delete 'transfer-encoding'
header[ 'content-length' ] = "Content-Length: #{total}"
end
def content_length( header )
unless str = header[ 'content-length' ] then
return nil
end
unless /\Acontent-length:\s*(\d+)/i === str then
raise HTTPBadResponse, "content-length format error"
end
$1.to_i
end
def chunked?( header )
if str = header[ 'transfer-encoding' ] then
if /\Atransfer-encoding:\s*chunked/i === str then
return true
end
end
false
end
end
end # module Net
|