14 - parsing urls.rb

O Reilly Ruby Cookbook source code

require 'uri'

URI.parse('https://www.example.com').scheme           # => "https"
URI.parse('http://www.example.com/').host             # => "www.example.com"
URI.parse('http://www.example.com:6060/').port        # => 6060
URI.parse('http://example.com/a/file.html').path      # => "/a/file.html"
#---
URI.split('http://example.com/a/file.html')
# => ["http", nil, "example.com", nil, nil, "/a/file.html", nil, nil, nil]
#---
URI::HTTP.component
# => [:scheme, :userinfo, :host, :port, :path, :query, :fragment]

URI::MailTo.component
# => [:scheme, :to, :headers]
#---
URI::HTTP.build(:host => 'example.com', :path => '/a/file.html',
                :fragment => 'section_3').to_s
# => "http://example.com/a/file.html#section_3"
#---
class URI::Generic
  def dump
    component.each do |m|
      puts "#{m}: #{send(m).inspect}"
    end
  end
end
#---
url = 'http://leonardr:[e-mail]:6060' +
	'/cgi-bin/mycgi.cgi?key1=val1#anchor'
URI.parse(url).dump
# scheme: "http"
# userinfo: "leonardr:pw"
# host: "www.subdomain.example.com"
# port: 6060
# path: "/cgi-bin/mycgi.cgi"
# query: "key1=val1"
# fragment: "anchor"
#---
URI::parse('ftp://leonardr:[e-mail]/a/file.txt').dump
# scheme: "ftp"
# userinfo: "leonardr:password"
# host: "ftp.example.com"
# port: 21
# path: "/a/file.txt"
# typecode: nil
#---
uri = URI::parse('mailto:[e-mail]?Subject=Hello&body=Hi!')
uri.dump
# scheme: "mailto"
# to: "[e-mail]"
# headers: [["Subject", "Hello"], ["body", "Hi!"]]

puts uri.to_mailtext
# To: [e-mail]
# Subject: Hello
# 
# Hi!
#---
URI::parse("ldap://ldap.example.com").dump
# scheme: "ldap"
# host: "ldap.example.com"
# port: 389
# dn: nil
# attributes: nil
# scope: nil
# filter: nil
# extensions: nil

URI::parse('ldap://ldap.example.com/o=Alice%20Exeter,c=US?extension').dump
# scheme: "ldap"
# host: "ldap.example.com"
# port: 389
# dn: "o=Alice%20Exeter,c=US"
# attributes: "extension"
# scope: nil
# filter: nil
# extensions: nil
#---
uri = URI.parse('tag:example.com,2006,my-tag')
uri.scheme                                      # => "tag"
uri.opaque                                      # => "example.com,2006,my-tag"
#---
uri = URI.parse('http://www.example.com/#anchor')
uri.port = 8080
uri.to_s                            # => "http://www.example.com:8080/#anchor"
#---