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Edit File : remote_fetcher.rb \| Size : 13.50 KB
require 'rubygems' require 'rubygems/user_interaction' require 'uri' ## # RemoteFetcher handles the details of fetching gems and gem information from # a remote source. class Gem::RemoteFetcher BuiltinSSLCerts = File.expand_path("./ssl_certs/.pem", File.dirname(__FILE__)) include Gem::UserInteraction ## # A FetchError exception wraps up the various possible IO and HTTP failures # that could happen while downloading from the internet. class FetchError < Gem::Exception ## # The URI which was being accessed when the exception happened. attr_accessor :uri def initialize(message, uri) super message @uri = uri end def to_s # :nodoc: "#{super} (#{uri})" end end @fetcher = nil ## # Cached RemoteFetcher instance. def self.fetcher @fetcher \|\|= self.new Gem.configuration[:http_proxy] end ## # Initialize a remote fetcher using the source URI and possible proxy # information. # # +proxy+ # [String]: explicit specification of proxy; overrides any environment # variable setting # * nil: respect environment variables (HTTP_PROXY, HTTP_PROXY_USER, # HTTP_PROXY_PASS) # * <tt>:no_proxy</tt>: ignore environment variables and _don't_ use a proxy def initialize(proxy = nil) require 'net/http' require 'stringio' require 'time' require 'uri' Socket.do_not_reverse_lookup = true @connections = {} @requests = Hash.new 0 @proxy_uri = case proxy when :no_proxy then nil when nil then get_proxy_from_env when URI::HTTP then proxy else URI.parse(proxy) end @user_agent = user_agent end ## # Given a name and requirement, downloads this gem into cache and returns the # filename. Returns nil if the gem cannot be located. #-- # Should probably be integrated with #download below, but that will be a # larger, more emcompassing effort. -erikh def download_to_cache dependency found = Gem::SpecFetcher.fetcher.fetch dependency, true, true, dependency.prerelease? return if found.empty? spec, source_uri = found.sort_by { \|(s,_)\| s.version }.last download spec, source_uri end ## # Moves the gem +spec+ from +source_uri+ to the cache dir unless it is # already there. If the source_uri is local the gem cache dir copy is # always replaced. def download(spec, source_uri, install_dir = Gem.dir) Gem.ensure_gem_subdirectories(install_dir) rescue nil if File.writable?(install_dir) cache_dir = File.join install_dir, "cache" else cache_dir = File.join Gem.user_dir, "cache" end gem_file_name = File.basename spec.cache_file local_gem_path = File.join cache_dir, gem_file_name FileUtils.mkdir_p cache_dir rescue nil unless File.exist? cache_dir # Always escape URI's to deal with potential spaces and such unless URI::Generic === source_uri source_uri = URI.parse(URI.const_defined?(:DEFAULT_PARSER) ? URI::DEFAULT_PARSER.escape(source_uri.to_s) : URI.escape(source_uri.to_s)) end scheme = source_uri.scheme # URI.parse gets confused by MS Windows paths with forward slashes. scheme = nil if scheme =~ /^[a-z]$/i case scheme when 'http', 'https' then unless File.exist? local_gem_path then begin say "Downloading gem #{gem_file_name}" if Gem.configuration.really_verbose remote_gem_path = source_uri + "gems/#{gem_file_name}" gem = self.fetch_path remote_gem_path rescue Gem::RemoteFetcher::FetchError raise if spec.original_platform == spec.platform alternate_name = "#{spec.original_name}.gem" say "Failed, downloading gem #{alternate_name}" if Gem.configuration.really_verbose remote_gem_path = source_uri + "gems/#{alternate_name}" gem = self.fetch_path remote_gem_path end File.open local_gem_path, 'wb' do \|fp\| fp.write gem end end when 'file' then begin path = source_uri.path path = File.dirname(path) if File.extname(path) == '.gem' remote_gem_path = correct_for_windows_path(File.join(path, 'gems', gem_file_name)) FileUtils.cp(remote_gem_path, local_gem_path) rescue Errno::EACCES local_gem_path = source_uri.to_s end say "Using local gem #{local_gem_path}" if Gem.configuration.really_verbose when nil then # TODO test for local overriding cache source_path = if Gem.win_platform? && source_uri.scheme && !source_uri.path.include?(':') then "#{source_uri.scheme}:#{source_uri.path}" else source_uri.path end source_path = unescape source_path begin FileUtils.cp source_path, local_gem_path unless File.expand_path(source_path) == File.expand_path(local_gem_path) rescue Errno::EACCES local_gem_path = source_uri.to_s end say "Using local gem #{local_gem_path}" if Gem.configuration.really_verbose else raise Gem::InstallError, "unsupported URI scheme #{source_uri.scheme}" end local_gem_path end ## # File Fetcher. Dispatched by +fetch_path+. Use it instead. def fetch_file uri, _ Gem.read_binary correct_for_windows_path uri.path end ## # HTTP Fetcher. Dispatched by +fetch_path+. Use it instead. def fetch_http uri, last_modified = nil, head = false, depth = 0 fetch_type = head ? Net::HTTP::Head : Net::HTTP::Get response = request uri, fetch_type, last_modified case response when Net::HTTPOK, Net::HTTPNotModified then head ? response : response.body when Net::HTTPMovedPermanently, Net::HTTPFound, Net::HTTPSeeOther, Net::HTTPTemporaryRedirect then raise FetchError.new('too many redirects', uri) if depth > 10 location = URI.parse response['Location'] if https?(uri) && !https?(location) raise FetchError.new("redirecting to non-https resource: #{location}", uri) end fetch_http(location, last_modified, head, depth + 1) else raise FetchError.new("bad response #{response.message} #{response.code}", uri) end end alias :fetch_https :fetch_http ## # Downloads +uri+ and returns it as a String. def fetch_path(uri, mtime = nil, head = false) uri = URI.parse uri unless URI::Generic === uri raise ArgumentError, "bad uri: #{uri}" unless uri raise ArgumentError, "uri scheme is invalid: #{uri.scheme.inspect}" unless uri.scheme data = send "fetch_#{uri.scheme}", uri, mtime, head data = Gem.gunzip data if data and not head and uri.to_s =~ /gz$/ data rescue FetchError raise rescue Timeout::Error raise FetchError.new('timed out', uri.to_s) rescue IOError, SocketError, SystemCallError => e raise FetchError.new("#{e.class}: #{e}", uri.to_s) end ## # Returns the size of +uri+ in bytes. def fetch_size(uri) # TODO: phase this out response = fetch_path(uri, nil, true) response['content-length'].to_i end def escape(str) return unless str @uri_parser \|\|= uri_escaper @uri_parser.escape str end def unescape(str) return unless str @uri_parser \|\|= uri_escaper @uri_parser.unescape str end def uri_escaper URI::Parser.new rescue NameError URI end ## # Returns an HTTP proxy URI if one is set in the environment variables. def get_proxy_from_env env_proxy = ENV['http_proxy'] \|\| ENV['HTTP_PROXY'] return nil if env_proxy.nil? or env_proxy.empty? uri = URI.parse(normalize_uri(env_proxy)) if uri and uri.user.nil? and uri.password.nil? then # Probably we have http_proxy_ variables? uri.user = escape(ENV['http_proxy_user'] \|\| ENV['HTTP_PROXY_USER']) uri.password = escape(ENV['http_proxy_pass'] \|\| ENV['HTTP_PROXY_PASS']) end uri end ## # Normalize the URI by adding "http://" if it is missing. def normalize_uri(uri) (uri =~ /^(https?\|ftp\|file):/) ? uri : "http://#{uri}" end ## # Creates or an HTTP connection based on +uri+, or retrieves an existing # connection, using a proxy if needed. def connection_for(uri) net_http_args = [uri.host, uri.port] if @proxy_uri then net_http_args += [ @proxy_uri.host, @proxy_uri.port, @proxy_uri.user, @proxy_uri.password ] end connection_id = [Thread.current.object_id, net_http_args].join ':' @connections[connection_id] \|\|= Net::HTTP.new(net_http_args) connection = @connections[connection_id] if https?(uri) and !connection.started? then configure_connection_for_https(connection) end connection.start unless connection.started? connection rescue OpenSSL::SSL::SSLError, Errno::EHOSTDOWN => e raise FetchError.new(e.message, uri) end def configure_connection_for_https(connection) require 'net/https' connection.use_ssl = true connection.verify_mode = Gem.configuration.ssl_verify_mode \|\| OpenSSL::SSL::VERIFY_PEER store = OpenSSL::X509::Store.new if Gem.configuration.ssl_ca_cert if File.directory? Gem.configuration.ssl_ca_cert store.add_path Gem.configuration.ssl_ca_cert else store.add_file Gem.configuration.ssl_ca_cert end else store.set_default_paths add_rubygems_trusted_certs(store) end connection.cert_store = store end def add_rubygems_trusted_certs(store) Dir.glob(BuiltinSSLCerts).each do \|ssl_cert_file\| store.add_file ssl_cert_file end end def correct_for_windows_path(path) if path[0].chr == '/' && path[1].chr =~ /[a-z]/i && path[2].chr == ':' path = path[1..-1] else path end end ## # Read the data from the (source based) URI, but if it is a file:// URI, # read from the filesystem instead. def open_uri_or_path(uri, last_modified = nil, head = false, depth = 0) raise "NO: Use fetch_path instead" # TODO: deprecate for fetch_path end ## # Performs a Net::HTTP request of type +request_class+ on +uri+ returning # a Net::HTTP response object. request maintains a table of persistent # connections to reduce connect overhead. def request(uri, request_class, last_modified = nil) request = request_class.new uri.request_uri unless uri.nil? \|\| uri.user.nil? \|\| uri.user.empty? then request.basic_auth uri.user, uri.password end request.add_field 'User-Agent', @user_agent request.add_field 'Connection', 'keep-alive' request.add_field 'Keep-Alive', '30' if last_modified then last_modified = last_modified.utc request.add_field 'If-Modified-Since', last_modified.rfc2822 end yield request if block_given? connection = connection_for uri retried = false bad_response = false begin @requests[connection.object_id] += 1 say "#{request.method} #{uri}" if Gem.configuration.really_verbose file_name = File.basename(uri.path) # perform download progress reporter only for gems if request.response_body_permitted? && file_name =~ /\.gem$/ reporter = ui.download_reporter response = connection.request(request) do \|incomplete_response\| if Net::HTTPOK === incomplete_response reporter.fetch(file_name, incomplete_response.content_length) downloaded = 0 data = '' incomplete_response.read_body do \|segment\| data << segment downloaded += segment.length reporter.update(downloaded) end reporter.done if incomplete_response.respond_to? :body= incomplete_response.body = data else incomplete_response.instance_variable_set(:@body, data) end end end else response = connection.request request end say "#{response.code} #{response.message}" if Gem.configuration.really_verbose rescue Net::HTTPBadResponse say "bad response" if Gem.configuration.really_verbose reset connection raise FetchError.new('too many bad responses', uri) if bad_response bad_response = true retry # HACK work around EOFError bug in Net::HTTP # NOTE Errno::ECONNABORTED raised a lot on Windows, and make impossible # to install gems. rescue EOFError, Timeout::Error, Errno::ECONNABORTED, Errno::ECONNRESET, Errno::EPIPE requests = @requests[connection.object_id] say "connection reset after #{requests} requests, retrying" if Gem.configuration.really_verbose raise FetchError.new('too many connection resets', uri) if retried reset connection retried = true retry end response end ## # Resets HTTP connection +connection+. def reset(connection) @requests.delete connection.object_id connection.finish connection.start end def user_agent ua = "RubyGems/#{Gem::VERSION} #{Gem::Platform.local}" ruby_version = RUBY_VERSION ruby_version += 'dev' if RUBY_PATCHLEVEL == -1 ua << " Ruby/#{ruby_version} (#{RUBY_RELEASE_DATE}" if RUBY_PATCHLEVEL >= 0 then ua << " patchlevel #{RUBY_PATCHLEVEL}" elsif defined?(RUBY_REVISION) then ua << " revision #{RUBY_REVISION}" end ua << ")" ua << " #{RUBY_ENGINE}" if defined?(RUBY_ENGINE) and RUBY_ENGINE != 'ruby' ua end def https?(uri) uri.scheme.downcase == 'https' end end Back

Edit File : remote_fetcher.rb | Size : 13.50 KB

require 'rubygems'
require 'rubygems/user_interaction'
require 'uri'

##
# RemoteFetcher handles the details of fetching gems and gem information from
# a remote source.

class Gem::RemoteFetcher

BuiltinSSLCerts = File.expand_path("./ssl_certs/*.pem", File.dirname(__FILE__))

include Gem::UserInteraction

##
  # A FetchError exception wraps up the various possible IO and HTTP failures
  # that could happen while downloading from the internet.

class FetchError < Gem::Exception

##
    # The URI which was being accessed when the exception happened.

attr_accessor :uri

def initialize(message, uri)
      super message
      @uri = uri
    end

def to_s # :nodoc:
      "#{super} (#{uri})"
    end

end

@fetcher = nil

##
  # Cached RemoteFetcher instance.

def self.fetcher
    @fetcher ||= self.new Gem.configuration[:http_proxy]
  end

##
  # Initialize a remote fetcher using the source URI and possible proxy
  # information.
  #
  # +proxy+
  # * [String]: explicit specification of proxy; overrides any environment
  #             variable setting
  # * nil: respect environment variables (HTTP_PROXY, HTTP_PROXY_USER,
  #        HTTP_PROXY_PASS)
  # * <tt>:no_proxy</tt>: ignore environment variables and _don't_ use a proxy

def initialize(proxy = nil)
    require 'net/http'
    require 'stringio'
    require 'time'
    require 'uri'

Socket.do_not_reverse_lookup = true

@connections = {}
    @requests = Hash.new 0
    @proxy_uri =
      case proxy
      when :no_proxy then nil
      when nil then get_proxy_from_env
      when URI::HTTP then proxy
      else URI.parse(proxy)
      end
    @user_agent = user_agent
  end

##
  # Given a name and requirement, downloads this gem into cache and returns the
  # filename. Returns nil if the gem cannot be located.
  #--
  # Should probably be integrated with #download below, but that will be a
  # larger, more emcompassing effort. -erikh

def download_to_cache dependency
    found = Gem::SpecFetcher.fetcher.fetch dependency, true, true,
                                           dependency.prerelease?

return if found.empty?

spec, source_uri = found.sort_by { |(s,_)| s.version }.last

download spec, source_uri
  end

##
  # Moves the gem +spec+ from +source_uri+ to the cache dir unless it is
  # already there.  If the source_uri is local the gem cache dir copy is
  # always replaced.

def download(spec, source_uri, install_dir = Gem.dir)
    Gem.ensure_gem_subdirectories(install_dir) rescue nil

if File.writable?(install_dir)
      cache_dir = File.join install_dir, "cache"
    else
      cache_dir = File.join Gem.user_dir, "cache"
    end

gem_file_name = File.basename spec.cache_file
    local_gem_path = File.join cache_dir, gem_file_name

FileUtils.mkdir_p cache_dir rescue nil unless File.exist? cache_dir

# Always escape URI's to deal with potential spaces and such
    unless URI::Generic === source_uri
      source_uri = URI.parse(URI.const_defined?(:DEFAULT_PARSER) ?
                             URI::DEFAULT_PARSER.escape(source_uri.to_s) :
                             URI.escape(source_uri.to_s))
    end

scheme = source_uri.scheme

# URI.parse gets confused by MS Windows paths with forward slashes.
    scheme = nil if scheme =~ /^[a-z]$/i

case scheme
    when 'http', 'https' then
      unless File.exist? local_gem_path then
        begin
          say "Downloading gem #{gem_file_name}" if
            Gem.configuration.really_verbose

remote_gem_path = source_uri + "gems/#{gem_file_name}"

gem = self.fetch_path remote_gem_path
        rescue Gem::RemoteFetcher::FetchError
          raise if spec.original_platform == spec.platform

alternate_name = "#{spec.original_name}.gem"

say "Failed, downloading gem #{alternate_name}" if
            Gem.configuration.really_verbose

remote_gem_path = source_uri + "gems/#{alternate_name}"

gem = self.fetch_path remote_gem_path
        end

File.open local_gem_path, 'wb' do |fp|
          fp.write gem
        end
      end
    when 'file' then
      begin
        path = source_uri.path
        path = File.dirname(path) if File.extname(path) == '.gem'

remote_gem_path = correct_for_windows_path(File.join(path, 'gems', gem_file_name))

FileUtils.cp(remote_gem_path, local_gem_path)
      rescue Errno::EACCES
        local_gem_path = source_uri.to_s
      end

say "Using local gem #{local_gem_path}" if
        Gem.configuration.really_verbose
    when nil then # TODO test for local overriding cache
      source_path = if Gem.win_platform? && source_uri.scheme &&
                       !source_uri.path.include?(':') then
                      "#{source_uri.scheme}:#{source_uri.path}"
                    else
                      source_uri.path
                    end

source_path = unescape source_path

begin
        FileUtils.cp source_path, local_gem_path unless
          File.expand_path(source_path) == File.expand_path(local_gem_path)
      rescue Errno::EACCES
        local_gem_path = source_uri.to_s
      end

say "Using local gem #{local_gem_path}" if
        Gem.configuration.really_verbose
    else
      raise Gem::InstallError, "unsupported URI scheme #{source_uri.scheme}"
    end

local_gem_path
  end

##
  # File Fetcher. Dispatched by +fetch_path+. Use it instead.

def fetch_file uri, *_
    Gem.read_binary correct_for_windows_path uri.path
  end

##
  # HTTP Fetcher. Dispatched by +fetch_path+. Use it instead.

def fetch_http uri, last_modified = nil, head = false, depth = 0
    fetch_type = head ? Net::HTTP::Head : Net::HTTP::Get
    response   = request uri, fetch_type, last_modified

case response
    when Net::HTTPOK, Net::HTTPNotModified then
      head ? response : response.body
    when Net::HTTPMovedPermanently, Net::HTTPFound, Net::HTTPSeeOther,
         Net::HTTPTemporaryRedirect then
      raise FetchError.new('too many redirects', uri) if depth > 10

location = URI.parse response['Location']

if https?(uri) && !https?(location)
        raise FetchError.new("redirecting to non-https resource: #{location}", uri)
      end

fetch_http(location, last_modified, head, depth + 1)
    else
      raise FetchError.new("bad response #{response.message} #{response.code}", uri)
    end
  end

alias :fetch_https :fetch_http

##
  # Downloads +uri+ and returns it as a String.

def fetch_path(uri, mtime = nil, head = false)
    uri = URI.parse uri unless URI::Generic === uri

raise ArgumentError, "bad uri: #{uri}" unless uri
    raise ArgumentError, "uri scheme is invalid: #{uri.scheme.inspect}" unless
      uri.scheme

data = send "fetch_#{uri.scheme}", uri, mtime, head
    data = Gem.gunzip data if data and not head and uri.to_s =~ /gz$/
    data
  rescue FetchError
    raise
  rescue Timeout::Error
    raise FetchError.new('timed out', uri.to_s)
  rescue IOError, SocketError, SystemCallError => e
    raise FetchError.new("#{e.class}: #{e}", uri.to_s)
  end

##
  # Returns the size of +uri+ in bytes.

def fetch_size(uri) # TODO: phase this out
    response = fetch_path(uri, nil, true)

response['content-length'].to_i
  end

def escape(str)
    return unless str
    @uri_parser ||= uri_escaper
    @uri_parser.escape str
  end

def unescape(str)
    return unless str
    @uri_parser ||= uri_escaper
    @uri_parser.unescape str
  end

def uri_escaper
    URI::Parser.new
  rescue NameError
    URI
  end

##
  # Returns an HTTP proxy URI if one is set in the environment variables.

def get_proxy_from_env
    env_proxy = ENV['http_proxy'] || ENV['HTTP_PROXY']

return nil if env_proxy.nil? or env_proxy.empty?

uri = URI.parse(normalize_uri(env_proxy))

if uri and uri.user.nil? and uri.password.nil? then
      # Probably we have http_proxy_* variables?
      uri.user = escape(ENV['http_proxy_user'] || ENV['HTTP_PROXY_USER'])
      uri.password = escape(ENV['http_proxy_pass'] || ENV['HTTP_PROXY_PASS'])
    end

uri
  end

##
  # Normalize the URI by adding "http://" if it is missing.

def normalize_uri(uri)
    (uri =~ /^(https?|ftp|file):/) ? uri : "http://#{uri}"
  end

##
  # Creates or an HTTP connection based on +uri+, or retrieves an existing
  # connection, using a proxy if needed.

def connection_for(uri)
    net_http_args = [uri.host, uri.port]

if @proxy_uri then
      net_http_args += [
        @proxy_uri.host,
        @proxy_uri.port,
        @proxy_uri.user,
        @proxy_uri.password
      ]
    end

connection_id = [Thread.current.object_id, *net_http_args].join ':'
    @connections[connection_id] ||= Net::HTTP.new(*net_http_args)
    connection = @connections[connection_id]

if https?(uri) and !connection.started? then
      configure_connection_for_https(connection)
    end

connection.start unless connection.started?

connection
  rescue OpenSSL::SSL::SSLError, Errno::EHOSTDOWN => e
    raise FetchError.new(e.message, uri)
  end

def configure_connection_for_https(connection)
    require 'net/https'

connection.use_ssl = true
    connection.verify_mode =
      Gem.configuration.ssl_verify_mode || OpenSSL::SSL::VERIFY_PEER

store = OpenSSL::X509::Store.new

if Gem.configuration.ssl_ca_cert
      if File.directory? Gem.configuration.ssl_ca_cert
        store.add_path Gem.configuration.ssl_ca_cert
      else
        store.add_file Gem.configuration.ssl_ca_cert
      end
    else
      store.set_default_paths
      add_rubygems_trusted_certs(store)
    end

connection.cert_store = store
  end

def add_rubygems_trusted_certs(store)
    Dir.glob(BuiltinSSLCerts).each do |ssl_cert_file|
      store.add_file ssl_cert_file
    end
  end

def correct_for_windows_path(path)
    if path[0].chr == '/' && path[1].chr =~ /[a-z]/i && path[2].chr == ':'
      path = path[1..-1]
    else
      path
    end
  end

##
  # Read the data from the (source based) URI, but if it is a file:// URI,
  # read from the filesystem instead.

def open_uri_or_path(uri, last_modified = nil, head = false, depth = 0)
    raise "NO: Use fetch_path instead"
    # TODO: deprecate for fetch_path
  end

##
  # Performs a Net::HTTP request of type +request_class+ on +uri+ returning
  # a Net::HTTP response object.  request maintains a table of persistent
  # connections to reduce connect overhead.

def request(uri, request_class, last_modified = nil)
    request = request_class.new uri.request_uri

unless uri.nil? || uri.user.nil? || uri.user.empty? then
      request.basic_auth uri.user, uri.password
    end

request.add_field 'User-Agent', @user_agent
    request.add_field 'Connection', 'keep-alive'
    request.add_field 'Keep-Alive', '30'

if last_modified then
      last_modified = last_modified.utc
      request.add_field 'If-Modified-Since', last_modified.rfc2822
    end

yield request if block_given?

connection = connection_for uri

retried = false
    bad_response = false

begin
      @requests[connection.object_id] += 1

say "#{request.method} #{uri}" if
        Gem.configuration.really_verbose

file_name = File.basename(uri.path)
      # perform download progress reporter only for gems
      if request.response_body_permitted? && file_name =~ /\.gem$/
        reporter = ui.download_reporter
        response = connection.request(request) do |incomplete_response|
          if Net::HTTPOK === incomplete_response
            reporter.fetch(file_name, incomplete_response.content_length)
            downloaded = 0
            data = ''

incomplete_response.read_body do |segment|
              data << segment
              downloaded += segment.length
              reporter.update(downloaded)
            end
            reporter.done
            if incomplete_response.respond_to? :body=
              incomplete_response.body = data
            else
              incomplete_response.instance_variable_set(:@body, data)
            end
          end
        end
      else
        response = connection.request request
      end

say "#{response.code} #{response.message}" if
        Gem.configuration.really_verbose

rescue Net::HTTPBadResponse
      say "bad response" if Gem.configuration.really_verbose

reset connection

raise FetchError.new('too many bad responses', uri) if bad_response

bad_response = true
      retry
    # HACK work around EOFError bug in Net::HTTP
    # NOTE Errno::ECONNABORTED raised a lot on Windows, and make impossible
    # to install gems.
    rescue EOFError, Timeout::Error,
           Errno::ECONNABORTED, Errno::ECONNRESET, Errno::EPIPE

requests = @requests[connection.object_id]
      say "connection reset after #{requests} requests, retrying" if
        Gem.configuration.really_verbose

raise FetchError.new('too many connection resets', uri) if retried

reset connection

retried = true
      retry
    end

response
  end

##
  # Resets HTTP connection +connection+.

def reset(connection)
    @requests.delete connection.object_id

connection.finish
    connection.start
  end

def user_agent
    ua = "RubyGems/#{Gem::VERSION} #{Gem::Platform.local}"

ruby_version = RUBY_VERSION
    ruby_version += 'dev' if RUBY_PATCHLEVEL == -1

ua << " Ruby/#{ruby_version} (#{RUBY_RELEASE_DATE}"
    if RUBY_PATCHLEVEL >= 0 then
      ua << " patchlevel #{RUBY_PATCHLEVEL}"
    elsif defined?(RUBY_REVISION) then
      ua << " revision #{RUBY_REVISION}"
    end
    ua << ")"

ua << " #{RUBY_ENGINE}" if defined?(RUBY_ENGINE) and RUBY_ENGINE != 'ruby'

ua
  end

def https?(uri)
    uri.scheme.downcase == 'https'
  end

end

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