Results for: "uri"

ConditionVariable

ConditionVariable objects augment class Mutex. Using condition variables, it is possible to suspend while in the middle of a critical section until a resource becomes available.

Example:

require 'thread'

mutex = Mutex.new
resource = ConditionVariable.new

a = Thread.new {
   mutex.synchronize {
     # Thread 'a' now needs the resource
     resource.wait(mutex)
     # 'a' can now have the resource
   }
}

b = Thread.new {
   mutex.synchronize {
     # Thread 'b' has finished using the resource
     resource.signal
   }
}

Rinda

A module to implement the Linda distributed computing paradigm in Ruby.

Rinda is part of DRb (dRuby).

Example(s)

See the sample/drb/ directory in the Ruby distribution, from 1.8.2 onwards.

Secure random number generator interface.

This library is an interface to secure random number generators which are suitable for generating session keys in HTTP cookies, etc.

You can use this library in your application by requiring it:

require 'securerandom'

It supports the following secure random number generators:

openssl
/dev/urandom
Win32

Examples

Generate random hexadecimal strings:

require 'securerandom'

p SecureRandom.hex(10) #=> "52750b30ffbc7de3b362"
p SecureRandom.hex(10) #=> "92b15d6c8dc4beb5f559"
p SecureRandom.hex(13) #=> "39b290146bea6ce975c37cfc23"

Generate random base64 strings:

p SecureRandom.base64(10) #=> "EcmTPZwWRAozdA=="
p SecureRandom.base64(10) #=> "KO1nIU+p9DKxGg=="
p SecureRandom.base64(12) #=> "7kJSM/MzBJI+75j8"

Generate random binary strings:

p SecureRandom.random_bytes(10) #=> "\016\t{\370g\310pbr\301"
p SecureRandom.random_bytes(10) #=> "\323U\030TO\234\357\020\a\337"

Generate UUIDs:

p SecureRandom.uuid #=> "2d931510-d99f-494a-8c67-87feb05e1594"
p SecureRandom.uuid #=> "bad85eb9-0713-4da7-8d36-07a8e4b00eab"

WEB server toolkit.

WEBrick is an HTTP server toolkit that can be configured as an HTTPS server, a proxy server, and a virtual-host server. WEBrick features complete logging of both server operations and HTTP access. WEBrick supports both basic and digest authentication in addition to algorithms not in RFC 2617.

A WEBrick server can be composed of multiple WEBrick servers or servlets to provide differing behavior on a per-host or per-path basis. WEBrick includes servlets for handling CGI scripts, ERB pages, Ruby blocks and directory listings.

WEBrick also includes tools for daemonizing a process and starting a process at a higher privilege level and dropping permissions.

Starting an HTTP server

To create a new WEBrick::HTTPServer that will listen to connections on port 8000 and serve documents from the current user’s public_html folder:

require 'webrick'

root = File.expand_path '~/public_html'
server = WEBrick::HTTPServer.new :Port => 8000, :DocumentRoot => root

To run the server you will need to provide a suitable shutdown hook as starting the server blocks the current thread:

trap 'INT' do server.shutdown end

server.start

Custom Behavior

The easiest way to have a server perform custom operations is through WEBrick::HTTPServer#mount_proc. The block given will be called with a WEBrick::HTTPRequest with request info and a WEBrick::HTTPResponse which must be filled in appropriately:

server.mount_proc '/' do |req, res|
  res.body = 'Hello, world!'
end

Remember that server.mount_proc must precede server.start.

Servlets

Advanced custom behavior can be obtained through mounting a subclass of WEBrick::HTTPServlet::AbstractServlet. Servlets provide more modularity when writing an HTTP server than mount_proc allows. Here is a simple servlet:

class Simple < WEBrick::HTTPServlet::AbstractServlet
  def do_GET request, response
    status, content_type, body = do_stuff_with request

    response.status = 200
    response['Content-Type'] = 'text/plain'
    response.body = 'Hello, World!'
  end
end

To initialize the servlet you mount it on the server:

server.mount '/simple', Simple

See WEBrick::HTTPServlet::AbstractServlet for more details.

Virtual Hosts

A server can act as a virtual host for multiple host names. After creating the listening host, additional hosts that do not listen can be created and attached as virtual hosts:

server = WEBrick::HTTPServer.new # ...

vhost = WEBrick::HTTPServer.new :ServerName => 'vhost.example',
                                :DoNotListen => true, # ...
vhost.mount '/', ...

server.virtual_host vhost

If no :DocumentRoot is provided and no servlets or procs are mounted on the main server it will return 404 for all URLs.

HTTPS

To create an HTTPS server you only need to enable SSL and provide an SSL certificate name:

require 'webrick'
require 'webrick/https'

cert_name = [
  %w[CN localhost],
]

server = WEBrick::HTTPServer.new(:Port => 8000,
                                 :SSLEnable => true,
                                 :SSLCertName => cert_name)

This will start the server with a self-generated self-signed certificate. The certificate will be changed every time the server is restarted.

To create a server with a pre-determined key and certificate you can provide them:

require 'webrick'
require 'webrick/https'
require 'openssl'

cert = OpenSSL::X509::Certificate.new File.read '/path/to/cert.pem'
pkey = OpenSSL::PKey::RSA.new File.read '/path/to/pkey.pem'

server = WEBrick::HTTPServer.new(:Port => 8000,
                                 :SSLEnable => true,
                                 :SSLCertificate => cert,
                                 :SSLPrivateKey => pkey)

Proxy Server

WEBrick can act as a proxy server:

require 'webrick'
require 'webrick/httpproxy'

proxy = WEBrick::HTTPProxyServer.new :Port => 8000

trap 'INT' do proxy.shutdown end

See WEBrick::HTTPProxy for further details including modifying proxied responses.

Basic and `Digest` authentication

WEBrick provides both Basic and Digest authentication for regular and proxy servers. See WEBrick::HTTPAuth, WEBrick::HTTPAuth::BasicAuth and WEBrick::HTTPAuth::DigestAuth.

`WEBrick` as a Production Web Server

WEBrick can be run as a production server for small loads.

Daemonizing

To start a WEBrick server as a daemon simple run WEBrick::Daemon.start before starting the server.

Dropping Permissions

WEBrick can be started as one user to gain permission to bind to port 80 or 443 for serving HTTP or HTTPS traffic then can drop these permissions for regular operation. To listen on all interfaces for HTTP traffic:

sockets = WEBrick::Utils.create_listeners nil, 80

Then drop privileges:

WEBrick::Utils.su 'www'

Then create a server that does not listen by default:

server = WEBrick::HTTPServer.new :DoNotListen => true, # ...

Then overwrite the listening sockets with the port 80 sockets:

server.listeners.replace sockets

Logging

WEBrick can separately log server operations and end-user access. For server operations:

log_file = File.open '/var/log/webrick.log', 'a+'
log = WEBrick::Log.new log_file

For user access logging:

access_log = [
  [log_file, WEBrick::AccessLog::COMBINED_LOG_FORMAT],
]

server = WEBrick::HTTPServer.new :Logger => log, :AccessLog => access_log

See WEBrick::AccessLog for further log formats.

`Log` Rotation

To rotate logs in WEBrick on a HUP signal (like syslogd can send), open the log file in ‘a+’ mode (as above) and trap ‘HUP’ to reopen the log file:

trap 'HUP' do log_file.reopen '/path/to/webrick.log', 'a+'

Copyright

Author: IPR – Internet Programming with Ruby – writers

IO::generic_writable

No documentation available

URI::LDAP#build_path_query

private method to assemble query from attributes, scope, filter and extensions.

URI::RFC2396_Parser#make_regexp

returns Regexp that is default self.regexp, unless schemes is provided. Then it is a Regexp.union with self.pattern

URI::RFC2396_Parser#initialize_pattern

Constructs the default Hash of patterns

URI::RFC2396_Parser#initialize_regexp

Constructs the default Hash of Regexp’s

WIN32OLE_VARIABLE

WIN32OLE_VARIABLE objects represent OLE variable information.

WIN32OLE_VARIANT

WIN32OLE_VARIANT objects represents OLE variant.

Win32OLE converts Ruby object into OLE variant automatically when invoking OLE methods. If OLE method requires the argument which is different from the variant by automatic conversion of Win32OLE, you can convert the specfied variant type by using WIN32OLE_VARIANT class.

param = WIN32OLE_VARIANT.new(10, WIN32OLE::VARIANT::VT_R4)
oleobj.method(param)

WIN32OLE_VARIANT does not support VT_RECORD variant. Use WIN32OLE_RECORD class instead of WIN32OLE_VARIANT if the VT_RECORD variant is needed.

RSS::RDF::Channel::Items::Seq::required_uri

No documentation available

Fiddle::Closure

Description

An FFI closure wrapper, for handling callbacks.

Example

closure = Class.new(Fiddle::Closure) {
  def call
    10
  end
}.new(Fiddle::TYPE_INT, [])
   #=> #<#<Class:0x0000000150d308>:0x0000000150d240>
func = Fiddle::Function.new(closure, [], Fiddle::TYPE_INT)
   #=> #<Fiddle::Function:0x00000001516e58>
func.call
   #=> 10

JSON::CircularDatastructure

No documentation available

JSON::GenericObject

No documentation available

Socket::UDPSource

UDP/IP address information used by Socket.udp_server_loop.

Zlib::GzipWriter

Zlib::GzipWriter is a class for writing gzipped files. GzipWriter should be used with an instance of IO, or IO-like, object.

Following two example generate the same result.

Zlib::GzipWriter.open('hoge.gz') do |gz|
  gz.write 'jugemu jugemu gokou no surikire...'
end

File.open('hoge.gz', 'w') do |f|
  gz = Zlib::GzipWriter.new(f)
  gz.write 'jugemu jugemu gokou no surikire...'
  gz.close
end

To make like gzip(1) does, run following:

orig = 'hoge.txt'
Zlib::GzipWriter.open('hoge.gz') do |gz|
  gz.mtime = File.mtime(orig)
  gz.orig_name = orig
  gz.write IO.binread(orig)
end

NOTE: Due to the limitation of Ruby’s finalizer, you must explicitly close GzipWriter objects by Zlib::GzipWriter#close etc. Otherwise, GzipWriter will be not able to write the gzip footer and will generate a broken gzip file.

DRb.install_id_conv TimerIdConv.new 60 # one minute

Results for: "uri"

Example(s)

Secure random number generator interface.

Examples

WEB server toolkit.

Starting an HTTP server

Custom Behavior

Servlets

Virtual Hosts

HTTPS

Proxy Server

Basic and Digest authentication

WEBrick as a Production Web Server

Daemonizing

Dropping Permissions

Logging

Log Rotation

Copyright

Description

Example

Basic and `Digest` authentication

`WEBrick` as a Production Web Server

`Log` Rotation