mirror of
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25a9b62d45
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@30996 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
451 lines
12 KiB
Ruby
451 lines
12 KiB
Ruby
######################################################################
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# This file is imported from the rubygems project.
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# DO NOT make modifications in this repo. They _will_ be reverted!
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# File a patch instead and assign it to Ryan Davis or Eric Hodel.
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######################################################################
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require 'rubygems'
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require 'rubygems/user_interaction'
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require 'uri'
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##
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# RemoteFetcher handles the details of fetching gems and gem information from
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# a remote source.
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class Gem::RemoteFetcher
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include Gem::UserInteraction
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##
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# A FetchError exception wraps up the various possible IO and HTTP failures
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# that could happen while downloading from the internet.
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class FetchError < Gem::Exception
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##
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# The URI which was being accessed when the exception happened.
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attr_accessor :uri
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def initialize(message, uri)
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super message
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@uri = uri
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end
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def to_s # :nodoc:
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"#{super} (#{uri})"
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end
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end
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@fetcher = nil
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##
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# Cached RemoteFetcher instance.
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def self.fetcher
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@fetcher ||= self.new Gem.configuration[:http_proxy]
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end
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##
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# Initialize a remote fetcher using the source URI and possible proxy
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# information.
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#
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# +proxy+
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# * [String]: explicit specification of proxy; overrides any environment
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# variable setting
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# * nil: respect environment variables (HTTP_PROXY, HTTP_PROXY_USER,
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# HTTP_PROXY_PASS)
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# * <tt>:no_proxy</tt>: ignore environment variables and _don't_ use a proxy
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def initialize(proxy = nil)
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require 'net/http'
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require 'stringio'
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require 'time'
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require 'uri'
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Socket.do_not_reverse_lookup = true
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@connections = {}
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@requests = Hash.new 0
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@proxy_uri =
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case proxy
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when :no_proxy then nil
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when nil then get_proxy_from_env
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when URI::HTTP then proxy
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else URI.parse(proxy)
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end
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end
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##
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# Given a name and requirement, downloads this gem into cache and returns the
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# filename. Returns nil if the gem cannot be located.
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#--
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# Should probably be integrated with #download below, but that will be a
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# larger, more emcompassing effort. -erikh
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def download_to_cache dependency
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found = Gem::SpecFetcher.fetcher.fetch dependency
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return if found.empty?
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spec, source_uri = found.first
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download spec, source_uri
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end
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##
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# Moves the gem +spec+ from +source_uri+ to the cache dir unless it is
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# already there. If the source_uri is local the gem cache dir copy is
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# always replaced.
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def download(spec, source_uri, install_dir = Gem.dir)
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Gem.ensure_gem_subdirectories(install_dir) rescue nil
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if File.writable?(install_dir)
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cache_dir = Gem.cache_dir(install_dir)
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else
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cache_dir = Gem.cache_dir(Gem.user_dir)
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end
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gem_file_name = spec.file_name
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local_gem_path = File.join cache_dir, gem_file_name
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FileUtils.mkdir_p cache_dir rescue nil unless File.exist? cache_dir
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# Always escape URI's to deal with potential spaces and such
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unless URI::Generic === source_uri
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source_uri = URI.parse(URI.const_defined?(:DEFAULT_PARSER) ?
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URI::DEFAULT_PARSER.escape(source_uri) :
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URI.escape(source_uri))
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end
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scheme = source_uri.scheme
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# URI.parse gets confused by MS Windows paths with forward slashes.
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scheme = nil if scheme =~ /^[a-z]$/i
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case scheme
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when 'http', 'https' then
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unless File.exist? local_gem_path then
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begin
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say "Downloading gem #{gem_file_name}" if
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Gem.configuration.really_verbose
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remote_gem_path = source_uri + "gems/#{gem_file_name}"
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gem = self.fetch_path remote_gem_path
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rescue Gem::RemoteFetcher::FetchError
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raise if spec.original_platform == spec.platform
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alternate_name = "#{spec.original_name}.gem"
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say "Failed, downloading gem #{alternate_name}" if
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Gem.configuration.really_verbose
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remote_gem_path = source_uri + "gems/#{alternate_name}"
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gem = self.fetch_path remote_gem_path
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end
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File.open local_gem_path, 'wb' do |fp|
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fp.write gem
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end
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end
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when 'file' then
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begin
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path = source_uri.path
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path = File.dirname(path) if File.extname(path) == '.gem'
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remote_gem_path = correct_for_windows_path(File.join(path, 'gems', gem_file_name))
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FileUtils.cp(remote_gem_path, local_gem_path)
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rescue Errno::EACCES
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local_gem_path = source_uri.to_s
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end
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say "Using local gem #{local_gem_path}" if
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Gem.configuration.really_verbose
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when nil then # TODO test for local overriding cache
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source_path = if Gem.win_platform? && source_uri.scheme &&
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!source_uri.path.include?(':') then
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"#{source_uri.scheme}:#{source_uri.path}"
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else
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source_uri.path
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end
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source_path = unescape source_path
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begin
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FileUtils.cp source_path, local_gem_path unless
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File.expand_path(source_path) == File.expand_path(local_gem_path)
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rescue Errno::EACCES
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local_gem_path = source_uri.to_s
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end
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say "Using local gem #{local_gem_path}" if
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Gem.configuration.really_verbose
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else
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raise Gem::InstallError, "unsupported URI scheme #{source_uri.scheme}"
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end
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local_gem_path
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end
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##
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# Downloads +uri+ and returns it as a String.
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def fetch_path(uri, mtime = nil, head = false)
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data = open_uri_or_path uri, mtime, head
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data = Gem.gunzip data if data and not head and uri.to_s =~ /gz$/
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data
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rescue FetchError
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raise
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rescue Timeout::Error
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raise FetchError.new('timed out', uri)
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rescue IOError, SocketError, SystemCallError => e
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raise FetchError.new("#{e.class}: #{e}", uri)
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end
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##
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# Returns the size of +uri+ in bytes.
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def fetch_size(uri) # TODO: phase this out
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response = fetch_path(uri, nil, true)
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response['content-length'].to_i
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end
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def escape(str)
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return unless str
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@uri_parser ||= uri_escaper
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@uri_parser.escape str
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end
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def unescape(str)
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return unless str
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@uri_parser ||= uri_escaper
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@uri_parser.unescape str
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end
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def uri_escaper
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URI::Parser.new
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rescue NameError
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URI
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end
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##
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# Returns an HTTP proxy URI if one is set in the environment variables.
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def get_proxy_from_env
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env_proxy = ENV['http_proxy'] || ENV['HTTP_PROXY']
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return nil if env_proxy.nil? or env_proxy.empty?
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uri = URI.parse(normalize_uri(env_proxy))
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if uri and uri.user.nil? and uri.password.nil? then
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# Probably we have http_proxy_* variables?
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uri.user = escape(ENV['http_proxy_user'] || ENV['HTTP_PROXY_USER'])
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uri.password = escape(ENV['http_proxy_pass'] || ENV['HTTP_PROXY_PASS'])
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end
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uri
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end
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##
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# Normalize the URI by adding "http://" if it is missing.
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def normalize_uri(uri)
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(uri =~ /^(https?|ftp|file):/) ? uri : "http://#{uri}"
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end
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##
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# Creates or an HTTP connection based on +uri+, or retrieves an existing
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# connection, using a proxy if needed.
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def connection_for(uri)
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net_http_args = [uri.host, uri.port]
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if @proxy_uri then
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net_http_args += [
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@proxy_uri.host,
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@proxy_uri.port,
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@proxy_uri.user,
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@proxy_uri.password
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]
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end
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connection_id = [Thread.current.object_id, *net_http_args].join ':'
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@connections[connection_id] ||= Net::HTTP.new(*net_http_args)
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connection = @connections[connection_id]
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if uri.scheme == 'https' and not connection.started? then
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require 'net/https'
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connection.use_ssl = true
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connection.verify_mode = OpenSSL::SSL::VERIFY_NONE
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end
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connection.start unless connection.started?
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connection
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rescue Errno::EHOSTDOWN => e
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raise FetchError.new(e.message, uri)
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end
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def correct_for_windows_path(path)
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if path[0].chr == '/' && path[1].chr =~ /[a-z]/i && path[2].chr == ':'
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path = path[1..-1]
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else
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path
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end
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end
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##
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# Read the data from the (source based) URI, but if it is a file:// URI,
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# read from the filesystem instead.
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def open_uri_or_path(uri, last_modified = nil, head = false, depth = 0)
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raise "block is dead" if block_given?
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uri = URI.parse uri unless URI::Generic === uri
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# This check is redundant unless Gem::RemoteFetcher is likely
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# to be used directly, since the scheme is checked elsewhere.
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# - Daniel Berger
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unless ['http', 'https', 'file'].include?(uri.scheme)
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raise ArgumentError, 'uri scheme is invalid'
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end
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if uri.scheme == 'file'
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path = correct_for_windows_path(uri.path)
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return Gem.read_binary(path)
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end
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fetch_type = head ? Net::HTTP::Head : Net::HTTP::Get
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response = request uri, fetch_type, last_modified
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case response
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when Net::HTTPOK, Net::HTTPNotModified then
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head ? response : response.body
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when Net::HTTPMovedPermanently, Net::HTTPFound, Net::HTTPSeeOther,
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Net::HTTPTemporaryRedirect then
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raise FetchError.new('too many redirects', uri) if depth > 10
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open_uri_or_path(response['Location'], last_modified, head, depth + 1)
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else
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raise FetchError.new("bad response #{response.message} #{response.code}", uri)
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end
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end
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##
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# Performs a Net::HTTP request of type +request_class+ on +uri+ returning
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# a Net::HTTP response object. request maintains a table of persistent
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# connections to reduce connect overhead.
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def request(uri, request_class, last_modified = nil)
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request = request_class.new uri.request_uri
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unless uri.nil? || uri.user.nil? || uri.user.empty? then
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request.basic_auth uri.user, uri.password
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end
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ua = "RubyGems/#{Gem::VERSION} #{Gem::Platform.local}"
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ua << " Ruby/#{RUBY_VERSION} (#{RUBY_RELEASE_DATE}"
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ua << " patchlevel #{RUBY_PATCHLEVEL}" if defined? RUBY_PATCHLEVEL
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ua << ")"
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request.add_field 'User-Agent', ua
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request.add_field 'Connection', 'keep-alive'
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request.add_field 'Keep-Alive', '30'
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if last_modified then
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last_modified = last_modified.utc
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request.add_field 'If-Modified-Since', last_modified.rfc2822
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end
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yield request if block_given?
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connection = connection_for uri
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retried = false
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bad_response = false
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begin
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@requests[connection.object_id] += 1
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say "#{request.method} #{uri}" if
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Gem.configuration.really_verbose
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file_name = File.basename(uri.path)
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# perform download progress reporter only for gems
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if request.response_body_permitted? && file_name =~ /\.gem$/
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reporter = ui.download_reporter
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response = connection.request(request) do |incomplete_response|
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if Net::HTTPOK === incomplete_response
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reporter.fetch(file_name, incomplete_response.content_length)
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downloaded = 0
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data = ''
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incomplete_response.read_body do |segment|
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data << segment
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downloaded += segment.length
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reporter.update(downloaded)
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end
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reporter.done
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if incomplete_response.respond_to? :body=
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incomplete_response.body = data
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else
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incomplete_response.instance_variable_set(:@body, data)
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end
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end
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end
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else
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response = connection.request request
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end
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say "#{response.code} #{response.message}" if
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Gem.configuration.really_verbose
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rescue Net::HTTPBadResponse
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say "bad response" if Gem.configuration.really_verbose
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reset connection
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raise FetchError.new('too many bad responses', uri) if bad_response
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bad_response = true
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retry
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# HACK work around EOFError bug in Net::HTTP
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# NOTE Errno::ECONNABORTED raised a lot on Windows, and make impossible
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# to install gems.
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rescue EOFError, Timeout::Error,
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Errno::ECONNABORTED, Errno::ECONNRESET, Errno::EPIPE
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requests = @requests[connection.object_id]
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say "connection reset after #{requests} requests, retrying" if
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Gem.configuration.really_verbose
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raise FetchError.new('too many connection resets', uri) if retried
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reset connection
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retried = true
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retry
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end
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response
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end
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##
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# Resets HTTP connection +connection+.
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def reset(connection)
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@requests.delete connection.object_id
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connection.finish
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connection.start
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end
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end
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