class ApipieBindings::API

Attributes

apidoc_cache_name[R]
dry_run[W]
fake_responses[R]
language[R]

Public Class Methods

new(config, options={}) click to toggle source

Creates new API bindings instance @param [Hash] config API bindings configuration @option config [String] :uri base URL of the server @option config [String] :username username to access the API @option config [String] :password username to access the API @option config [Hash] :oauth options to access API using OAuth

* *:consumer_key* (String) OAuth key
* *:consumer_secret* (String) OAuth secret
* *:options* (Hash) options passed to OAuth

@option config [AbstractCredentials] :credentials object implementing {AbstractCredentials}

interface e.g. {https://github.com/theforeman/hammer-cli-foreman/blob/master/lib/hammer_cli_foreman/credentials.rb HammerCLIForeman::BasicCredentials}
This is prefered way to pass credentials. Credentials acquired form :credentials object take
precedence over explicite params

@option config [Hash] :headers additional headers to send with the requests @option config [String] :api_version ('1') version of the API @option config [String] :language prefered locale for the API description @option config [String] :apidoc_cache_base_dir ('~/.cache/apipie_bindings') base

directory for building apidoc_cache_dir

@option config [String] :apidoc_cache_dir (apidoc_cache_base_dir+'/<URI>') where

to cache the JSON description of the API

@option config [String] :apidoc_cache_name ('default.json') name of te cache file.

If there is cache in the :apidoc_cache_dir, it is used.

@option config [String] :apidoc_authenticated (true) whether or not does the call to

obtain API description use authentication. It is useful to avoid unnecessary prompts
for credentials

@option config [Hash] :fake_responses ({}) responses to return if used in dry run mode @option config [Bool] :dry_run (false) dry run mode allows to test your scripts

and not touch the API. The results are taken form exemples in the API description
or from the :fake_responses

@option config [Bool] :aggressive_cache_checking (false) check before every request

if the local cache of API description (JSON) is up to date. By default it is checked
*after* each API request

@option config [Object] :logger (Logger.new(STDERR)) custom logger class @option config [Number] :timeout API request timeout in seconds @param [Hash] options params that are passed to ResClient as-is @raise [ApipieBindings::ConfigurationError] when no :uri or :apidoc_cache_dir is provided @example connect to a server

ApipieBindings::API.new({:uri => 'http://localhost:3000/',
  :username => 'admin', :password => 'changeme',
  :api_version => '2', :aggressive_cache_checking => true})

@example connect with a local API description

ApipieBindings::API.new({:apidoc_cache_dir => 'test/unit/data',
  :apidoc_cache_name => 'architecture'})
# File lib/apipie_bindings/api.rb, line 58
def initialize(config, options={})
  if config[:uri].nil? && config[:apidoc_cache_dir].nil?
    raise ApipieBindings::ConfigurationError.new('Either :uri or :apidoc_cache_dir needs to be set')
  end
  @uri = config[:uri]
  @api_version = config[:api_version] || 1
  @language = config[:language]
  apidoc_cache_base_dir = config[:apidoc_cache_base_dir] || File.join(File.expand_path('~/.cache'), 'apipie_bindings')
  @apidoc_cache_dir = config[:apidoc_cache_dir] || File.join(apidoc_cache_base_dir, @uri.tr(':/', '_'), "v#{@api_version}")
  @apidoc_cache_name = config[:apidoc_cache_name] || set_default_name
  @apidoc_authenticated = (config[:apidoc_authenticated].nil? ? true : config[:apidoc_authenticated])
  @dry_run = config[:dry_run] || false
  @aggressive_cache_checking = config[:aggressive_cache_checking] || false
  @fake_responses = config[:fake_responses] || {}
  @logger = config[:logger]
  unless @logger
    @logger = Logger.new(STDERR)
    @logger.level = Logger::ERROR
  end

  config = config.dup

  headers = {
    :content_type => 'application/json',
    :accept       => "application/json;version=#{@api_version}"
  }
  headers.merge!({ "Accept-Language" => language }) if language
  headers.merge!(config[:headers]) unless config[:headers].nil?
  headers.merge!(options.delete(:headers)) unless options[:headers].nil?

  log.debug "Global headers: #{headers.ai}"

  @credentials = config[:credentials] if config[:credentials] && config[:credentials].respond_to?(:to_params)

  @resource_config = {
    :timeout  => config[:timeout],
    :headers  => headers
  }.merge(options)

  @config = config
end

Public Instance Methods

apidoc() click to toggle source
# File lib/apipie_bindings/api.rb, line 113
def apidoc
  @apidoc = @apidoc || load_apidoc || retrieve_apidoc
  @apidoc
end
apidoc_cache_file() click to toggle source
# File lib/apipie_bindings/api.rb, line 101
def apidoc_cache_file
   File.join(@apidoc_cache_dir, "#{@apidoc_cache_name}#{cache_extension}")
end
call(resource_name, action_name, params={}, headers={}, options={}) click to toggle source

Call an action in the API. It finds most fitting route based on given parameters with other attributes neccessary to do an API call. If in #dry_run mode {#initialize} it finds fake response data in examples or user provided data. At the end when the response format is JSON it is parsed and returned as ruby objects. If server supports checksum sending the internal cache with API description is checked and updated if needed @param [Symbol] resource_name name of the resource @param [Symbol] action_name name of the action @param [Hash] params parameters to be send in the request @param [Hash] headers extra headers to be sent with the request @param [Hash] options options to influence the how the call is processed

* *:response* (Symbol) *:raw* - skip parsing JSON in response
* *:with_authentication* (Bool) *true* - use rest client with/without auth configuration
* *:skip_validation* (Bool) *false* - skip validation of parameters

@example show user data

call(:users, :show, :id => 1)
# File lib/apipie_bindings/api.rb, line 154
def call(resource_name, action_name, params={}, headers={}, options={})
  check_cache if @aggressive_cache_checking
  resource = resource(resource_name)
  action = resource.action(action_name)
  route = action.find_route(params)
  action.validate!(params) unless options[:skip_validation]
  options[:fake_response] = find_match(fake_responses, resource_name, action_name, params) || action.examples.first if dry_run?
  return http_call(
    route.method,
    route.path(params),
    params.reject { |par, _| route.params_in_path.include? par.to_s },
    headers, options)
end
check_cache() click to toggle source
# File lib/apipie_bindings/api.rb, line 240
def check_cache
  begin
    response = http_call('get', "/apidoc/apipie_checksum", {}, { :accept => "application/json" })
    response['checksum']
  rescue
    nil
  end
end
clean_cache() click to toggle source
# File lib/apipie_bindings/api.rb, line 235
def clean_cache
  @apidoc = nil
  Dir["#{@apidoc_cache_dir}/*#{cache_extension}"].each { |f| File.delete(f) }
end
dry_run?() click to toggle source
# File lib/apipie_bindings/api.rb, line 118
def dry_run?
  @dry_run ? true : false
end
has_resource?(name) click to toggle source
# File lib/apipie_bindings/api.rb, line 122
def has_resource?(name)
  apidoc[:docs][:resources].has_key? name
end
http_call(http_method, path, params={}, headers={}, options={}) click to toggle source

Low level call to the API. Suitable for calling actions not covered by apipie documentation. For all other cases use {#call} @param [String] http_method one of get, put, post, destroy, patch @param [String] path URL path that should be called @param [Hash] params parameters to be send in the request @param [Hash] headers extra headers to be sent with the request @param [Hash] options options to influence the how the call is processed

* *:response* (Symbol) *:raw* - skip parsing JSON in response
* *:reduce_response_log* (Bool) - do not show response content in the log.
* *:with_authentication* (Bool) *true* - use rest client with/without auth configuration

@example show user data

http_call('get', '/api/users/1')
# File lib/apipie_bindings/api.rb, line 180
def http_call(http_method, path, params={}, headers={}, options={})
  headers ||= { }

  args = [http_method]
  if %w[post put].include?(http_method.to_s)
    #If using multi-part forms, the paramaters should not be json
    if ((headers.include?(:content_type)) and (headers[:content_type] == "multipart/form-data"))
      args << params
    else
      args << params.to_json
    end
  else
    headers[:params] = params if params
  end

  log.info "#{http_method.to_s.upcase} #{path}"
  log.debug "Params: #{params.ai}"
  log.debug "Headers: #{headers.ai}"

  args << headers if headers

  if dry_run?
    empty_response = ApipieBindings::Example.new('', '', '', 200, '')
    ex = options[:fake_response ] || empty_response
    net_http_resp = Net::HTTPResponse.new(1.0, ex.status, "")
    response = RestClient::Response.create(ex.response, net_http_resp, args)
  else
    begin
      apidoc_without_auth = (path =~ /\/apidoc\//) && !@apidoc_authenticated
      authenticate = options[:with_authentication].nil? ? !apidoc_without_auth : options[:with_authentication]
      client = authenticate ? authenticated_client : unauthenticated_client
      response = call_client(client, path, args)
      update_cache(response.headers[:apipie_checksum])
    rescue => e
      log.debug e.message + "\n" +
        (e.respond_to?(:response) ? process_data(e.response).ai : e.ai)
      raise
    end
  end

  result = options[:response] == :raw ? response : process_data(response)
  log.debug "Response: %s" % (options[:reduce_response_log] ? "Received OK" : result.ai)
  log.debug "Response headers: #{response.headers.ai}" if response.respond_to?(:headers)
  result
end
load_apidoc() click to toggle source
# File lib/apipie_bindings/api.rb, line 105
def load_apidoc
  check_cache if @aggressive_cache_checking
  if File.exist?(apidoc_cache_file)
    JSON.parse(File.read(apidoc_cache_file), :symbolize_names => true)
  end
end
log() click to toggle source
# File lib/apipie_bindings/api.rb, line 273
def log
  @logger
end
resource(name) click to toggle source
# File lib/apipie_bindings/api.rb, line 126
def resource(name)
  ApipieBindings::Resource.new(name, self)
end
resources() click to toggle source

List available resources @return [Array<ApipieBindings::Resource>]

# File lib/apipie_bindings/api.rb, line 132
def resources
  apidoc[:docs][:resources].keys.map { |res| resource(res) }
end
retrieve_apidoc() click to toggle source
# File lib/apipie_bindings/api.rb, line 249
def retrieve_apidoc
  FileUtils.mkdir_p(@apidoc_cache_dir) unless File.exists?(@apidoc_cache_dir)
  if language
    response = retrieve_apidoc_call("/apidoc/v#{@api_version}.#{language}.json", :safe => true)
    language_family = language.split('_').first
    if !response && language_family != language
      response = retrieve_apidoc_call("/apidoc/v#{@api_version}.#{language_family}.json", :safe => true)
    end
  end
  unless response
    begin
      response = retrieve_apidoc_call("/apidoc/v#{@api_version}.json")
    rescue
      raise ApipieBindings::DocLoadingError.new(
        "Could not load data from #{@uri}\n"             " - is your server down?\n"             " - was rake apipie:cache run when using apipie cache? (typical production settings)")
    end
  end
  File.open(apidoc_cache_file, "w") { |f| f.write(response.body) }
  log.debug "New apidoc loaded from the server"
  load_apidoc
end
update_cache(cache_name) click to toggle source
# File lib/apipie_bindings/api.rb, line 227
def update_cache(cache_name)
  if !cache_name.nil? && (cache_name != @apidoc_cache_name)
    clean_cache
    log.debug "Cache expired. (#{@apidoc_cache_name} -> #{cache_name})"
    @apidoc_cache_name = cache_name
  end
end

Private Instance Methods

authenticated_client() click to toggle source
# File lib/apipie_bindings/api.rb, line 283
def authenticated_client
  unless @client_with_auth
    resource_config = @resource_config.merge({
      :user     => @config[:username],
      :password => @config[:password],
      :oauth    => @config[:oauth],
    })
    resource_config.merge!(@credentials.to_params) if @credentials
    @client_with_auth = RestClient::Resource.new(@config[:uri], resource_config)
  end
  @client_with_auth
end
cache_extension() click to toggle source
# File lib/apipie_bindings/api.rb, line 321
def cache_extension
  language ? ".#{language}.json" : ".json"
end
call_client(client, path, args) click to toggle source
# File lib/apipie_bindings/api.rb, line 279
def call_client(client, path, args)
  client[path].send(*args)
end
find_match(fakes, resource, action, params) click to toggle source
# File lib/apipie_bindings/api.rb, line 309
def find_match(fakes, resource, action, params)
  resource = fakes[[resource, action]]
  if resource
    if resource.has_key?(params)
      return resource[params]
    elsif resource.has_key?(:default)
      return resource[:default]
    end
  end
  return nil
end
process_data(response) click to toggle source
# File lib/apipie_bindings/api.rb, line 334
def process_data(response)
  data = begin
           JSON.parse((response.respond_to?(:body) ? response.body : response) || '')
         rescue JSON::ParserError
           response.respond_to?(:body) ? response.body : response || ''
         end
  return data
end
retrieve_apidoc_call(path, options={}) click to toggle source
# File lib/apipie_bindings/api.rb, line 300
def retrieve_apidoc_call(path, options={})
  begin
    http_call('get', path, {},
      {:accept => "application/json"}, {:response => :raw, :reduce_response_log => true})
  rescue
    raise unless options[:safe]
  end
end
set_default_name(default='default') click to toggle source
# File lib/apipie_bindings/api.rb, line 325
def set_default_name(default='default')
  cache_file = Dir["#{@apidoc_cache_dir}/*#{cache_extension}"].first
  if cache_file
    File.basename(cache_file, cache_extension)
  else
    default
  end
end
unauthenticated_client() click to toggle source
# File lib/apipie_bindings/api.rb, line 296
def unauthenticated_client
  @client_without_auth ||= RestClient::Resource.new(@config[:uri], @resource_config)
end