Class: Puppet::Indirector::REST

Inherits:
Terminus show all
Defined in:
lib/puppet/indirector/rest.rb

Overview

Access objects via REST

Constant Summary collapse

IndirectedRoutes = 
Puppet::Network::HTTP::API::IndirectedRoutes

Constants included from Util

Util::AbsolutePathPosix, Util::AbsolutePathWindows, Util::DEFAULT_POSIX_MODE, Util::DEFAULT_WINDOWS_MODE

Constants included from Util::POSIX

Util::POSIX::LOCALE_ENV_VARS, Util::POSIX::USER_ENV_VARS

Constants included from Util::SymbolicFileMode

Util::SymbolicFileMode::SetGIDBit, Util::SymbolicFileMode::SetUIDBit, Util::SymbolicFileMode::StickyBit, Util::SymbolicFileMode::SymbolicMode, Util::SymbolicFileMode::SymbolicSpecialToBit

Constants included from Util::Docs

Util::Docs::HEADER_LEVELS

Class Attribute Summary collapse

Attributes included from Util::Docs

#doc, #nodoc

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Terminus

abstract_terminus?, #allow_remote_requests?, const2name, #indirection, indirection_name, inherited, #initialize, mark_as_abstract_terminus, model, #model, #name, name2const, register_terminus_class, terminus_class, terminus_classes, #terminus_type, #validate, #validate_model

Methods included from Util::InstanceLoader

#instance_docs, #instance_hash, #instance_load, #instance_loader, #instance_loading?, #loaded_instance, #loaded_instances

Methods included from Util

absolute_path?, benchmark, chuser, clear_environment, default_env, deterministic_rand, deterministic_rand_int, exit_on_fail, get_env, get_environment, logmethods, merge_environment, path_to_uri, pretty_backtrace, replace_file, safe_posix_fork, set_env, symbolizehash, thinmark, uri_to_path, which, withenv, withumask

Methods included from Util::POSIX

#get_posix_field, #gid, #idfield, #methodbyid, #methodbyname, #search_posix_field, #uid

Methods included from Util::SymbolicFileMode

#normalize_symbolic_mode, #symbolic_mode_to_int, #valid_symbolic_mode?

Methods included from Util::Docs

#desc, #dochook, #doctable, #markdown_definitionlist, #markdown_header, #nodoc?, #pad, scrub

Constructor Details

This class inherits a constructor from Puppet::Indirector::Terminus

Class Attribute Details

.port_setting ⇒ Object (readonly) 



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# File 'lib/puppet/indirector/rest.rb', line 15

def port_setting
  @port_setting
end

.server_setting ⇒ Object (readonly) 



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# File 'lib/puppet/indirector/rest.rb', line 15

def server_setting
  @server_setting
end

Class Method Details

.port ⇒ Object

For port there’s a little bit of an extra snag: setting a specific server setting and relying on the default port for that server is common, so we also want to check if the assocaited SERVER setting has been set by the user. If either of those are set we ignore the failover-selected port.



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# File 'lib/puppet/indirector/rest.rb', line 75

def self.port
  setting = port_setting()
  srv_setting = server_setting()
  if (setting && setting != :masterport && Puppet.settings.set_by_config?(setting)) ||
     (srv_setting && srv_setting != :server && Puppet.settings.set_by_config?(srv_setting))
    Puppet.settings[setting].to_i
  else
    begin
      Puppet.lookup(:serverport).to_i
    rescue
      if primary_server = Puppet.settings[:server_list][0]
        Puppet.debug "Dynamically-bound port lookup failed; using first entry"

        # Port might not be set, so we want to fallback in that
        # case. We know we don't need to use `setting` here, since
        # the default value of every port setting is `masterport`
        (primary_server[1] || Puppet.settings[:masterport]).to_i
      else
        setting ||= :masterport
        Puppet.debug "Dynamically-bound port lookup failed; falling back to #{setting} setting"
        Puppet.settings[setting].to_i
      end
    end
  end
end

.server ⇒ Object

The logic for server and port is kind of gross. In summary: IF an endpoint-specific setting is requested AND that setting has been set by the user

Use that setting.
     The defaults for these settings are the "normal" server/masterport settings, so
     when they are unset we instead want to "fall back" to the failover-selected
     host/port pair.

ELSE IF we have a failover-selected host/port

Use what the failover logic came up with

ELSE IF the server_list setting is in use

Use the first entry - failover hasn't happened yet, but that
setting is still authoritative

ELSE

Go for the legacy server/masterport settings, and hope for the best



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# File 'lib/puppet/indirector/rest.rb', line 50

def self.server
  setting = server_setting()
  if setting && setting != :server && Puppet.settings.set_by_config?(setting)
    Puppet.settings[setting]
  else
    begin
      Puppet.lookup(:server)
    rescue
      if primary_server = Puppet.settings[:server_list][0]
        Puppet.debug "Dynamically-bound server lookup failed; using first entry"
        primary_server[0]
      else
        setting ||= :server
        Puppet.debug "Dynamically-bound server lookup failed, falling back to #{setting} setting"
        Puppet.settings[setting]
      end
    end
  end
end

.srv_service ⇒ Object 



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# File 'lib/puppet/indirector/rest.rb', line 33

def self.srv_service
  @srv_service || :puppet
end

.use_port_setting(setting) ⇒ Object

Specify the setting that we should use to get the port.



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# File 'lib/puppet/indirector/rest.rb', line 24

def self.use_port_setting(setting)
  @port_setting = setting
end

.use_server_setting(setting) ⇒ Object

Specify the setting that we should use to get the server name.



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# File 'lib/puppet/indirector/rest.rb', line 19

def self.use_server_setting(setting)
  @server_setting = setting
end

.use_srv_service(service) ⇒ Object

Specify the service to use when doing SRV record lookup



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# File 'lib/puppet/indirector/rest.rb', line 29

def self.use_srv_service(service)
  @srv_service = service
end

Instance Method Details

#add_profiling_header(headers) ⇒ Object 



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# File 'lib/puppet/indirector/rest.rb', line 115

def add_profiling_header(headers)
  if (Puppet[:profile])
    headers[Puppet::Network::HTTP::HEADER_ENABLE_PROFILING] = "true"
  end
  headers
end

#destroy(request) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/puppet/indirector/rest.rb', line 215

def destroy(request)
  raise ArgumentError, "DELETE does not accept options" unless request.options.empty?

  response = do_request(request) do |req|
    http_delete(req, IndirectedRoutes.request_to_uri(req), headers)
  end

  if is_http_200?(response)
    content_type, body = parse_response(response)
    deserialize_destroy(content_type, body)
  else
    nil
  end
end

#do_request(request) ⇒ Object

Encapsulate call to request.do_request with the arguments from this class Then yield to the code block that was called in We certainly could have retained the full request.do_request(…) { |r| … } but this makes the code much cleaner and we only then actually make the call to request.do_request from here, thus if we change what we pass or how we get it, we only need to change it here.



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# File 'lib/puppet/indirector/rest.rb', line 251

def do_request(request)
  request.do_request(self.class.srv_service, self.class.server, self.class.port) { |req| yield(req) }
end

#find(request) ⇒ Object 



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# File 'lib/puppet/indirector/rest.rb', line 152

def find(request)
  uri, body = IndirectedRoutes.request_to_uri_and_body(request)
  uri_with_query_string = "#{uri}?#{body}"

  response = do_request(request) do |req|
    # WEBrick in Ruby 1.9.1 only supports up to 1024 character lines in an HTTP request
    # http://redmine.ruby-lang.org/issues/show/3991
    if "GET #{uri_with_query_string} HTTP/1.1\r\n".length > 1024
      uri_with_env = "#{uri}?environment=#{request.environment.name}"
      http_post(req, uri_with_env, body, headers)
    else
      http_get(req, uri_with_query_string, headers)
    end
  end

  if is_http_200?(response)
    content_type, body = parse_response(response)
    result = deserialize_find(content_type, body)
    result.name = request.key if result.respond_to?(:name=)
    result

  elsif is_http_404?(response)
    return nil unless request.options[:fail_on_404]

    # 404 can get special treatment as the indirector API can not produce a meaningful
    # reason to why something is not found - it may not be the thing the user is
    # expecting to find that is missing, but something else (like the environment).
    # While this way of handling the issue is not perfect, there is at least an error
    # that makes a user aware of the reason for the failure.
    #
    content_type, body = parse_response(response)
    msg = "Find #{elide(uri_with_query_string, 100)} resulted in 404 with the message: #{body}"
    raise Puppet::Error, msg
  else
    nil
  end
end

#head(request) ⇒ Object 



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# File 'lib/puppet/indirector/rest.rb', line 190

def head(request)
  response = do_request(request) do |req|
    http_head(req, IndirectedRoutes.request_to_uri(req), headers)
  end

  if is_http_200?(response)
    true
  else
    false
  end
end

#headers ⇒ Object

Provide appropriate headers.



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# File 'lib/puppet/indirector/rest.rb', line 102

def headers
  # yaml is not allowed on the network
  network_formats = model.supported_formats.reject do |format|
    [:yaml, :b64_zlib_yaml].include?(format)
  end
  common_headers = {
    "Accept"                                     => network_formats.join(", "),
    Puppet::Network::HTTP::HEADER_PUPPET_VERSION => Puppet.version
  }

  add_accept_encoding(common_headers)
end

#http_delete(request, path, headers = nil, *args) ⇒ Object 



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# File 'lib/puppet/indirector/rest.rb', line 139

def http_delete(request, path, headers = nil, *args)
  http_request(:delete, request, path, add_profiling_header(headers), *args)
end

#http_get(request, path, headers = nil, *args) ⇒ Object 



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# File 'lib/puppet/indirector/rest.rb', line 127

def http_get(request, path, headers = nil, *args)
  http_request(:get, request, path, add_profiling_header(headers), *args)
end

#http_head(request, path, headers = nil, *args) ⇒ Object 



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# File 'lib/puppet/indirector/rest.rb', line 135

def http_head(request, path, headers = nil, *args)
  http_request(:head, request, path, add_profiling_header(headers), *args)
end

#http_post(request, path, data, headers = nil, *args) ⇒ Object 



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# File 'lib/puppet/indirector/rest.rb', line 131

def http_post(request, path, data, headers = nil, *args)
  http_request(:post, request, path, data, add_profiling_header(headers), *args)
end

#http_put(request, path, data, headers = nil, *args) ⇒ Object 



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# File 'lib/puppet/indirector/rest.rb', line 143

def http_put(request, path, data, headers = nil, *args)
  http_request(:put, request, path, data, add_profiling_header(headers), *args)
end

#http_request(method, request, *args) ⇒ Object 



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# File 'lib/puppet/indirector/rest.rb', line 147

def http_request(method, request, *args)
  conn = network(request)
  conn.send(method, *args)
end

#network(request) ⇒ Object 



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# File 'lib/puppet/indirector/rest.rb', line 122

def network(request)
  Puppet::Network::HttpPool.http_instance(request.server || self.class.server,
                                          request.port || self.class.port)
end

#save(request) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/puppet/indirector/rest.rb', line 230

def save(request)
  raise ArgumentError, "PUT does not accept options" unless request.options.empty?

  response = do_request(request) do |req|
    http_put(req, IndirectedRoutes.request_to_uri(req), req.instance.render, headers.merge({ "Content-Type" => req.instance.mime }))
  end

  if is_http_200?(response)
    content_type, body = parse_response(response)
    deserialize_save(content_type, body)
  else
    nil
  end
end

#search(request) ⇒ Object 



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# File 'lib/puppet/indirector/rest.rb', line 202

def search(request)
  response = do_request(request) do |req|
    http_get(req, IndirectedRoutes.request_to_uri(req), headers)
  end

  if is_http_200?(response)
    content_type, body = parse_response(response)
    deserialize_search(content_type, body) || []
  else
    []
  end
end

#validate_key(request) ⇒ Object 



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# File 'lib/puppet/indirector/rest.rb', line 255

def validate_key(request)
  # Validation happens on the remote end
end