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Filename : cdesc-WEBrick.ri
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U:RDoc::NormalModule[iI"WEBrick:EF@0o:RDoc::Markup::Document:@parts[&o;;[lS:RDoc::Markup::Heading:
leveli:	textI"WEB server toolkit.;To:RDoc::Markup::BlankLine�o:RDoc::Markup::Paragraph;[	I"RWEBrick is an HTTP server toolkit that can be configured as an HTTPS server, ;TI"Ka proxy server, and a virtual-host server.  WEBrick features complete ;TI"Ologging of both server operations and HTTP access.  WEBrick supports both ;TI"Obasic and digest authentication in addition to algorithms not in RFC 2617.;T@o;
;[	I"QA WEBrick server can be composed of multiple WEBrick servers or servlets to ;TI"Jprovide differing behavior on a per-host or per-path basis.  WEBrick ;TI"Lincludes servlets for handling CGI scripts, ERB pages, Ruby blocks and ;TI"directory listings.;T@o;
;[I"RWEBrick also includes tools for daemonizing a process and starting a process ;TI":at a higher privilege level and dropping permissions.;T@S;	;
i;I"Starting an HTTP server;T@o;
;[I"QTo create a new WEBrick::HTTPServer that will listen to connections on port ;TI"I8000 and serve documents from the current user's public_html folder:;T@o:RDoc::Markup::Verbatim;[	I"require 'webrick'
;TI"
;TI"-root = File.expand_path '~/public_html'
;TI"Kserver = WEBrick::HTTPServer.new :Port => 8000, :DocumentRoot => root
;T:@format0o;
;[I"LTo run the server you will need to provide a suitable shutdown hook as ;TI"3starting the server blocks the current thread:;T@o;;[I"'trap 'INT' do server.shutdown end
;TI"
;TI"server.start
;T;0S;	;
i;I"Custom Behavior;T@o;
;[	I"KThe easiest way to have a server perform custom operations is through ;TI"LWEBrick::HTTPServer#mount_proc.  The block given will be called with a ;TI"NWEBrick::HTTPRequest with request info and a WEBrick::HTTPResponse which ;TI"%must be filled in appropriately:;T@o;;[I")server.mount_proc '/' do |req, res|
;TI""  res.body = 'Hello, world!'
;TI"	end
;T;0o;
;[I"CRemember that +server.mount_proc+ must precede +server.start+.;T@S;	;
i;I"
Servlets;T@o;
;[	I"MAdvanced custom behavior can be obtained through mounting a subclass of ;TI"NWEBrick::HTTPServlet::AbstractServlet.  Servlets provide more modularity ;TI"Kwhen writing an HTTP server than mount_proc allows.  Here is a simple ;TI"
servlet:;T@o;;[I":class Simple < WEBrick::HTTPServlet::AbstractServlet
;TI"$  def do_GET request, response
;TI"<    status, content_type, body = do_stuff_with request
;TI"
;TI"    response.status = 200
;TI"1    response['Content-Type'] = 'text/plain'
;TI")    response.body = 'Hello, World!'
;TI"  end
;TI"	end
;T;0o;
;[I":To initialize the servlet you mount it on the server:;T@o;;[I"$server.mount '/simple', Simple
;T;0o;
;[I"@See WEBrick::HTTPServlet::AbstractServlet for more details.;T@S;	;
i;I"Virtual Hosts;T@o;
;[I"QA server can act as a virtual host for multiple host names.  After creating ;TI"Pthe listening host, additional hosts that do not listen can be created and ;TI"attached as virtual hosts:;T@o;;[I",server = WEBrick::HTTPServer.new # ...
;TI"
;TI"Evhost = WEBrick::HTTPServer.new :ServerName => 'vhost.example',
;TI"A                                :DoNotListen => true, # ...
;TI"vhost.mount '/', ...
;TI"
;TI"server.virtual_host vhost
;T;0o;
;[I"SIf no +:DocumentRoot+ is provided and no servlets or procs are mounted on the ;TI"1main server it will return 404 for all URLs.;T@S;	;
i;I"
HTTPS;T@o;
;[I"NTo create an HTTPS server you only need to enable SSL and provide an SSL ;TI"certificate name:;T@o;;[I"require 'webrick'
;TI"require 'webrick/https'
;TI"
;TI"cert_name = [
;TI"  %w[CN localhost],
;TI"]
;TI"
;TI"5server = WEBrick::HTTPServer.new(:Port => 8000,
;TI":                                 :SSLEnable => true,
;TI"A                                 :SSLCertName => cert_name)
;T;0o;
;[I"OThis will start the server with a self-generated self-signed certificate. ;TI"HThe certificate will be changed every time the server is restarted.;T@o;
;[I"RTo create a server with a pre-determined key and certificate you can provide ;TI"
them:;T@o;;[I"require 'webrick'
;TI"require 'webrick/https'
;TI"require 'openssl'
;TI"
;TI"Icert = OpenSSL::X509::Certificate.new File.read '/path/to/cert.pem'
;TI"Apkey = OpenSSL::PKey::RSA.new File.read '/path/to/pkey.pem'
;TI"
;TI"5server = WEBrick::HTTPServer.new(:Port => 8000,
;TI":                                 :SSLEnable => true,
;TI"?                                 :SSLCertificate => cert,
;TI">                                 :SSLPrivateKey => pkey)
;T;0S;	;
i;I"Proxy Server;T@o;
;[I"'WEBrick can act as a proxy server:;T@o;;[I"require 'webrick'
;TI"!require 'webrick/httpproxy'
;TI"
;TI"8proxy = WEBrick::HTTPProxyServer.new :Port => 8000
;TI"
;TI"&trap 'INT' do proxy.shutdown end
;T;0o;
;[I"LSee WEBrick::HTTPProxy for further details including modifying proxied ;TI"responses.;T@S;	;
i;I"$Basic and Digest authentication;T@o;
;[I"QWEBrick provides both Basic and Digest authentication for regular and proxy ;TI"Gservers.  See WEBrick::HTTPAuth, WEBrick::HTTPAuth::BasicAuth and ;TI"#WEBrick::HTTPAuth::DigestAuth.;T@S;	;
i;I"'WEBrick as a Production Web Server;T@o;
;[I"?WEBrick can be run as a production server for small loads.;T@S;	;
i;I"Daemonizing;T@o;
;[I"LTo start a WEBrick server as a daemon simple run WEBrick::Daemon.start ;TI" before starting the server.;T@S;	;
i;I"Dropping Permissions;T@o;
;[I"QWEBrick can be started as one user to gain permission to bind to port 80 or ;TI"O443 for serving HTTP or HTTPS traffic then can drop these permissions for ;TI"Fregular operation.  To listen on all interfaces for HTTP traffic:;T@o;;[I"7sockets = WEBrick::Utils.create_listeners nil, 80
;T;0o;
;[I"Then drop privileges:;T@o;;[I"WEBrick::Utils.su 'www'
;T;0o;
;[I":Then create a server that does not listen by default:;T@o;;[I"Bserver = WEBrick::HTTPServer.new :DoNotListen => true, # ...
;T;0o;
;[I"CThen overwrite the listening sockets with the port 80 sockets:;T@o;;[I"&server.listeners.replace sockets
;T;0S;	;
i;I"Logging;T@o;
;[I"LWEBrick can separately log server operations and end-user access.  For ;TI"server operations:;T@o;;[I"7log_file = File.open '/var/log/webrick.log', 'a+'
;TI"%log = WEBrick::Log.new log_file
;T;0o;
;[I"For user access logging:;T@o;;[
I"access_log = [
;TI"<  [log_file, WEBrick::AccessLog::COMBINED_LOG_FORMAT],
;TI"]
;TI"
;TI"Oserver = WEBrick::HTTPServer.new :Logger => log, :AccessLog => access_log
;T;0o;
;[I"4See WEBrick::AccessLog for further log formats.;T@S;	;
i;I"Log Rotation;T@o;
;[I"QTo rotate logs in WEBrick on a HUP signal (like syslogd can send), open the ;TI"Llog file in 'a+' mode (as above) and trap 'HUP' to reopen the log file:;T@o;;[I"@trap 'HUP' do log_file.reopen '/path/to/webrick.log', 'a+'
;T;0S;	;
i;I"Copyright;T@o;
;[I"=Author: IPR -- Internet Programming with Ruby -- writers;T@o;
;[I":Copyright (c) 2000 TAKAHASHI Masayoshi, GOTOU YUUZOU ;TI"KCopyright (c) 2002 Internet Programming with Ruby writers. All rights ;TI"reserved.;T:
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