Ruby On Rails in UA/Программирование на ROR/Доступ к удаленным рессурсам/RE: RE: Доступ к удаленным рессурсам

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# === Getting Document From WWW Server
#
# Example #1: Simple GET+print
#
# require 'net/http'
# Net::HTTP.get_print 'www.example.com', '/index.html'
#
# Example #2: Simple GET+print by URL
#
# require 'net/http'
# require 'uri'
# Net::HTTP.get_print URI.parse('http://www.example.com/index.html')
#
# Example #3: More generic GET+print
#
# require 'net/http'
# require 'uri'
#
# url = URI.parse('http://www.example.com/index.html')
# res = Net::HTTP.start(url.host, url.port) {|http|
# http.get('/index.html')
# }
# puts res.body
#
# Example #4: More generic GET+print
#
# require 'net/http'
#
# url = URI.parse('http://www.example.com/index.html')
# req = Net::HTTP::Get.new(url.path)
# res = Net::HTTP.start(url.host, url.port) {|http|
# http.request(req)
# }
# puts res.body
#
# === Posting Form Data
#
# require 'net/http'
# require 'uri'
#
# #1: Simple POST
# res = Net::HTTP.post_form(URI.parse('http://www.example.com/search.cgi'),
# {'q'=>'ruby', 'max'=>'50'})
# puts res.body
#
# #2: POST with basic authentication
# res = Net::HTTP.post_form(URI.parse('http://jack:pass@www.example.com/todo.cgi'),
# {'from'=>'2005-01-01', 'to'=>'2005-03-31'})
# puts res.body
#
# #3: Detailed control
# url = URI.parse('http://www.example.com/todo.cgi')
# req = Net::HTTP::Post.new(url.path)
# req.basic_auth 'jack', 'pass'
# req.set_form_data({'from'=>'2005-01-01', 'to'=>'2005-03-31'}, ';')
# res = Net::HTTP.new(url.host, url.port).start { http.request(req) }
# case res
# when Net::HTTPSuccess, Net::HTTPRedirection
# # OK
# else
# res.error!
# end
#
# === Accessing via Proxy
#
# Net::HTTP.Proxy creates http proxy class. It has same
# methods of Net::HTTP but its instances always connect to
# proxy, instead of given host.
#
# require 'net/http'
#
# proxy_addr = 'your.proxy.host'
# proxy_port = 8080
# :
# Net::HTTP::Proxy(proxy_addr, proxy_port).start('www.example.com') {|http|
# # always connect to your.proxy.addr:8080
# :
# }
#
# Since Net::HTTP.Proxy returns Net::HTTP itself when proxy_addr is nil,
# there's no need to change code if there's proxy or not.
#
# There are two additional parameters in Net::HTTP.Proxy which allow to
# specify proxy user name and password:
#
# Net::HTTP::Proxy(proxy_addr, proxy_port, proxy_user = nil, proxy_pass = nil)
#
# You may use them to work with authorization-enabled proxies:
#
# require 'net/http'
# require 'uri'
#
# proxy_host = 'your.proxy.host'
# proxy_port = 8080
# uri = URI.parse(ENV['http_proxy'])
# proxy_user, proxy_pass = uri.userinfo.split(/:/) if uri.userinfo
# Net::HTTP::Proxy(proxy_host, proxy_port,
# proxy_user, proxy_pass).start('www.example.com') {|http|
# # always connect to your.proxy.addr:8080 using specified username and password
# :
# }
#
# Note that net/http never rely on HTTP_PROXY environment variable.
# If you want to use proxy, set it explicitly.
#
# === Following Redirection
#
# require 'net/http'
# require 'uri'
#
# def fetch(uri_str, limit = 10)
# # You should choose better exception.
# raise ArgumentError, 'HTTP redirect too deep' if limit == 0
#
# response = Net::HTTP.get_response(URI.parse(uri_str))
# case response
# when Net::HTTPSuccess then response
# when Net::HTTPRedirection then fetch(response['location'], limit - 1)
# else
# response.error!
# end
# end
#
# print fetch('http://www.ruby-lang.org')
#
# Net::HTTPSuccess and Net::HTTPRedirection is a HTTPResponse class.
# All HTTPResponse objects belong to its own response class which
# indicate HTTP result status. For details of response classes,
# see section "HTTP Response Classes".
#
# === Basic Authentication
#
# require 'net/http'
#
# Net::HTTP.start('www.example.com') {|http|
# req = Net::HTTP::Get.new('/secret-page.html')
# req.basic_auth 'account', 'password'
# response = http.request(req)
# print response.body
# }