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#
# httpserver.rb -- HTTPServer 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: httpserver.rb,v 1.63 2002/10/01 17:16:32 gotoyuzo Exp $
require 'webrick/server'
require 'webrick/httputils'
require 'webrick/httpstatus'
require 'webrick/httprequest'
require 'webrick/httpresponse'
require 'webrick/httpservlet'
require 'webrick/accesslog'
module WEBrick
class HTTPServerError < ServerError; end
##
# An HTTP Server
class HTTPServer < ::WEBrick::GenericServer
##
# Creates a new HTTP server according to +config+
#
# An HTTP server uses the following attributes:
#
# :AccessLog:: An array of access logs. See WEBrick::AccessLog
# :BindAddress:: Local address for the server to bind to
# :DocumentRoot:: Root path to serve files from
# :DocumentRootOptions:: Options for the default HTTPServlet::FileHandler
# :HTTPVersion:: The HTTP version of this server
# :Port:: Port to listen on
# :RequestCallback:: Called with a request and response before each
# request is serviced.
# :RequestTimeout:: Maximum time to wait between requests
# :ServerAlias:: Array of alternate names for this server for virtual
# hosting
# :ServerName:: Name for this server for virtual hosting
def initialize(config={}, default=Config::HTTP)
super(config, default)
@http_version = HTTPVersion::convert(@config[:HTTPVersion])
@mount_tab = MountTable.new
if @config[:DocumentRoot]
mount("/", HTTPServlet::FileHandler, @config[:DocumentRoot],
@config[:DocumentRootOptions])
end
unless @config[:AccessLog]
@config[:AccessLog] = [
[ $stderr, AccessLog::COMMON_LOG_FORMAT ],
[ $stderr, AccessLog::REFERER_LOG_FORMAT ]
]
end
@virtual_hosts = Array.new
end
##
# Processes requests on +sock+
def run(sock)
while true
res = HTTPResponse.new(@config)
req = HTTPRequest.new(@config)
server = self
begin
timeout = @config[:RequestTimeout]
while timeout > 0
break if IO.select([sock], nil, nil, 0.5)
timeout = 0 if @status != :Running
timeout -= 0.5
end
raise HTTPStatus::EOFError if timeout <= 0
raise HTTPStatus::EOFError if sock.eof?
req.parse(sock)
res.request_method = req.request_method
res.request_uri = req.request_uri
res.request_http_version = req.http_version
res.keep_alive = req.keep_alive?
server = lookup_server(req) || self
if callback = server[:RequestCallback]
callback.call(req, res)
elsif callback = server[:RequestHandler]
msg = ":RequestHandler is deprecated, please use :RequestCallback"
@logger.warn(msg)
callback.call(req, res)
end
server.service(req, res)
rescue HTTPStatus::EOFError, HTTPStatus::RequestTimeout => ex
res.set_error(ex)
rescue HTTPStatus::Error => ex
@logger.error(ex.message)
res.set_error(ex)
rescue HTTPStatus::Status => ex
res.status = ex.code
rescue StandardError => ex
@logger.error(ex)
res.set_error(ex, true)
ensure
if req.request_line
if req.keep_alive? && res.keep_alive?
req.fixup()
end
res.send_response(sock)
server.access_log(@config, req, res)
end
end
break if @http_version < "1.1"
break unless req.keep_alive?
break unless res.keep_alive?
end
end
##
# Services +req+ and fills in +res+
def service(req, res)
if req.unparsed_uri == "*"
if req.request_method == "OPTIONS"
do_OPTIONS(req, res)
raise HTTPStatus::OK
end
raise HTTPStatus::NotFound, "`#{req.unparsed_uri}' not found."
end
servlet, options, script_name, path_info = search_servlet(req.path)
raise HTTPStatus::NotFound, "`#{req.path}' not found." unless servlet
req.script_name = script_name
req.path_info = path_info
si = servlet.get_instance(self, *options)
@logger.debug(format("%s is invoked.", si.class.name))
si.service(req, res)
end
##
# The default OPTIONS request handler says GET, HEAD, POST and OPTIONS
# requests are allowed.
def do_OPTIONS(req, res)
res["allow"] = "GET,HEAD,POST,OPTIONS"
end
##
# Mounts +servlet+ on +dir+ passing +options+ to the servlet at creation
# time
def mount(dir, servlet, *options)
@logger.debug(sprintf("%s is mounted on %s.", servlet.inspect, dir))
@mount_tab[dir] = [ servlet, options ]
end
##
# Mounts +proc+ or +block+ on +dir+ and calls it with a
# WEBrick::HTTPRequest and WEBrick::HTTPResponse
def mount_proc(dir, proc=nil, &block)
proc ||= block
raise HTTPServerError, "must pass a proc or block" unless proc
mount(dir, HTTPServlet::ProcHandler.new(proc))
end
##
# Unmounts +dir+
def unmount(dir)
@logger.debug(sprintf("unmount %s.", dir))
@mount_tab.delete(dir)
end
alias umount unmount
##
# Finds a servlet for +path+
def search_servlet(path)
script_name, path_info = @mount_tab.scan(path)
servlet, options = @mount_tab[script_name]
if servlet
[ servlet, options, script_name, path_info ]
end
end
##
# Adds +server+ as a virtual host.
def virtual_host(server)
@virtual_hosts << server
@virtual_hosts = @virtual_hosts.sort_by{|s|
num = 0
num -= 4 if s[:BindAddress]
num -= 2 if s[:Port]
num -= 1 if s[:ServerName]
num
}
end
##
# Finds the appropriate virtual host to handle +req+
def lookup_server(req)
@virtual_hosts.find{|s|
(s[:BindAddress].nil? || req.addr[3] == s[:BindAddress]) &&
(s[:Port].nil? || req.port == s[:Port]) &&
((s[:ServerName].nil? || req.host == s[:ServerName]) ||
(!s[:ServerAlias].nil? && s[:ServerAlias].find{|h| h === req.host}))
}
end
##
# Logs +req+ and +res+ in the access logs. +config+ is used for the
# server name.
def access_log(config, req, res)
param = AccessLog::setup_params(config, req, res)
@config[:AccessLog].each{|logger, fmt|
logger << AccessLog::format(fmt+"\n", param)
}
end
##
# Mount table for the path a servlet is mounted on in the directory space
# of the server. Users of WEBrick can only access this indirectly via
# WEBrick::HTTPServer#mount, WEBrick::HTTPServer#unmount and
# WEBrick::HTTPServer#search_servlet
class MountTable # :nodoc:
def initialize
@tab = Hash.new
compile
end
def [](dir)
dir = normalize(dir)
@tab[dir]
end
def []=(dir, val)
dir = normalize(dir)
@tab[dir] = val
compile
val
end
def delete(dir)
dir = normalize(dir)
res = @tab.delete(dir)
compile
res
end
def scan(path)
@scanner =~ path
[ $&, $' ]
end
private
def compile
k = @tab.keys
k.sort!
k.reverse!
k.collect!{|path| Regexp.escape(path) }
@scanner = Regexp.new("^(" + k.join("|") +")(?=/|$)")
end
def normalize(dir)
ret = dir ? dir.dup : ""
ret.sub!(%r|/+$|, "")
ret
end
end
end
end