/
client.rb
349 lines (272 loc) · 10.7 KB
/
client.rb
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require 'rest'
require 'json'
require 'yaml'
require 'iron_core/response_error'
module IronCore
class Client
attr_accessor :content_type
attr_accessor :env
def initialize(company, product, options = {}, default_options = {}, extra_options_list = [])
@options_list = [:scheme, :host, :port, :user_agent, :http_gem, :keystone] + extra_options_list
metaclass = class << self
self
end
@options_list.each do |option|
metaclass.send(:define_method, option.to_s) do
instance_variable_get('@' + option.to_s)
end
metaclass.send(:define_method, option.to_s + '=') do |value|
instance_variable_set('@' + option.to_s, value)
end
end
@env = options[:env] || options['env']
@env ||= ENV[company.upcase + '_' + product.upcase + '_ENV'] || ENV[company.upcase + '_ENV']
IronCore::Logger.info 'IronCore', "Setting env to '#{@env}'" unless @env.nil?
load_from_hash('params', options)
load_from_config(company, product, options[:config] || options['config'])
load_from_config(company, product, ENV[company.upcase + '_' + product.upcase + '_CONFIG'])
load_from_config(company, product, ENV[company.upcase + '_CONFIG'])
load_from_env(company.upcase + '_' + product.upcase)
load_from_env(company.upcase)
suffixes = []
unless @env.nil?
suffixes << "-#{@env}"
suffixes << "_#{@env}"
end
suffixes << ''
suffixes.each do |suffix|
['.json', '.yml'].each do |ext|
["#{company}-#{product}", "#{company}_#{product}", company].each do |config_base|
load_from_config(company, product, "#{Dir.pwd}/#{config_base}#{suffix}#{ext}")
load_from_config(company, product, "#{Dir.pwd}/.#{config_base}#{suffix}#{ext}")
load_from_config(company, product, "#{Dir.pwd}/config/#{config_base}#{suffix}#{ext}")
load_from_config(company, product, "#{Dir.pwd}/config/.#{config_base}#{suffix}#{ext}")
begin
load_from_config(company, product, "~/#{config_base}#{suffix}#{ext}")
load_from_config(company, product, "~/.#{config_base}#{suffix}#{ext}")
rescue Exception => ex
puts "Warning -- Unable to load from HOME: #{ex.message}"
end
end
end
end
load_from_hash('defaults', default_options)
load_from_hash('defaults', {:user_agent => 'iron_core_ruby-' + IronCore.version})
@content_type = 'application/json'
default_http_gem = RUBY_VERSION.split('.')[1].to_i == 8 ? :rest_client : nil
http_gem = @http_gem.nil? ? default_http_gem : @http_gem.to_sym
@rest = Rest::Client.new(:gem => http_gem)
if self.keystone && self.keystone.is_a?(Hash)
raise_keystone_config_error('server') if self.keystone[:server].nil?
raise_keystone_config_error('tenant') if self.keystone[:tenant].nil?
if self.keystone[:token].nil? && self.keystone[:tenant_token].nil? &&
(self.keystone[:username].nil? && self.keystone[:password].nil?)
raise_keystone_config_error('username, password or token')
end
@token_provider = IronCore::KeystoneTokenProvider.new(@rest, self.keystone)
else
@token_provider = IronCore::IronTokenProvider.new(@token)
end
end
def set_option(source, name, value)
if send(name.to_s).nil? && (not value.nil?)
if value.class == Hash
value.keys.each do |key|
if key.class == String
value[key.to_sym] = value[key]
value.delete(key)
end
end
end
IronCore::Logger.debug 'IronCore', "Setting #{name} to '#{value}' from #{source}"
send(name.to_s + '=', value)
end
end
def load_from_hash(source, hash)
return if hash.nil?
@options_list.each do |o|
set_option(source, o, hash[o.to_sym] || hash[o.to_s])
end
end
def load_from_env(prefix)
@options_list.each do |o|
set_option('environment variable', o, ENV[prefix + '_' + o.to_s.upcase])
end
end
def get_sub_hash(hash, subs)
return nil if hash.nil?
subs.each do |sub|
return nil if hash[sub].nil?
hash = hash[sub]
end
hash
end
def load_from_config(company, product, config_file)
return if config_file.nil?
if File.exists?(File.expand_path(config_file))
config_data = '{}'
begin
config_data = File.read(File.expand_path(config_file))
rescue
return
end
config = nil
if config_file.end_with?('.yml')
config = YAML.load(config_data)
else
config = JSON.parse(config_data)
end
unless @env.nil?
load_from_hash(config_file, get_sub_hash(config, [@env, "#{company}_#{product}"]))
load_from_hash(config_file, get_sub_hash(config, [@env, company, product]))
load_from_hash(config_file, get_sub_hash(config, [@env, product]))
load_from_hash(config_file, get_sub_hash(config, [@env, company]))
load_from_hash(config_file, get_sub_hash(config, ["#{company}_#{product}", @env]))
load_from_hash(config_file, get_sub_hash(config, [company, product, @env]))
load_from_hash(config_file, get_sub_hash(config, [product, @env]))
load_from_hash(config_file, get_sub_hash(config, [company, @env]))
load_from_hash(config_file, get_sub_hash(config, [@env]))
end
load_from_hash(config_file, get_sub_hash(config, ["#{company}_#{product}"]))
load_from_hash(config_file, get_sub_hash(config, [company, product]))
load_from_hash(config_file, get_sub_hash(config, [product]))
load_from_hash(config_file, get_sub_hash(config, [company]))
load_from_hash(config_file, get_sub_hash(config, []))
end
end
def options(return_strings = false)
res = {}
@options_list.each do |option|
res[return_strings ? option.to_s : option.to_sym] = send(option.to_s)
end
res
end
def headers
{'User-Agent' => @user_agent}
end
def base_url
"#{scheme}://#{host}:#{port}/"
end
def url(method)
base_url + method
end
def get(method, params = {})
request_hash = {}
request_hash[:headers] = headers
request_hash[:params] = params
IronCore::Logger.debug 'IronCore', "GET #{url(method)} with params='#{request_hash.to_s}'"
begin
@rest.get(url(method), request_hash)
rescue Rest::HttpError => ex
extract_error_msg(ex)
end
end
def extract_error_msg(ex)
if ex.response && ex.response.body
begin
bodyparsed = JSON.parse(ex.response.body)
msg = bodyparsed["msg"]
if msg
ex.msg = msg
end
rescue => ex
# ignore
end
end
raise ex
end
def post(method, params = {})
request_hash = {}
request_hash[:headers] = headers.merge({'Content-Type' => @content_type})
request_hash[:body] = params.to_json
IronCore::Logger.debug 'IronCore', "POST #{base_url + method} with params='#{request_hash.to_s}'"
begin
@rest.post(base_url + method, request_hash)
rescue Rest::HttpError => ex
extract_error_msg(ex)
end
end
def put(method, params={})
request_hash = {}
request_hash[:headers] = headers.merge({'Content-Type' => @content_type})
request_hash[:body] = params.to_json
IronCore::Logger.debug 'IronCore', "PUT #{base_url + method} with params='#{request_hash.to_s}'"
begin
@rest.put(base_url + method, request_hash)
rescue Rest::HttpError => ex
extract_error_msg(ex)
end
end
def patch(method, params={})
request_hash = {}
request_hash[:headers] = headers.merge({'Content-Type' => @content_type})
request_hash[:body] = params.to_json
IronCore::Logger.debug 'IronCore', "PUT #{base_url + method} with params='#{request_hash.to_s}'"
begin
@rest.patch(base_url + method, request_hash)
rescue Rest::HttpError => ex
extract_error_msg(ex)
end
end
def delete(method, params = {}, headers2={})
request_hash = {}
request_hash[:headers] = headers.merge(headers2)
if params.size > 0
request_hash[:headers].merge!({'Content-Type' => @content_type})
end
request_hash[:body] = params.to_json
IronCore::Logger.debug 'IronCore', "DELETE #{base_url + method} with params='#{request_hash.to_s}'"
begin
@rest.delete(base_url + method, request_hash)
rescue Rest::HttpError => ex
extract_error_msg(ex)
end
end
def post_file(method, file_field, file, params_field, params = {})
request_hash = {}
request_hash[:headers] = headers
request_hash[:body] = {params_field => params.to_json, file_field => file}
IronCore::Logger.debug 'IronCore', "POST #{base_url + method} with params='#{request_hash.to_s}'"
begin
@rest.post_file(base_url + method, request_hash)
rescue Rest::HttpError => ex
extract_error_msg(ex)
end
end
def stream_get(method, params = {})
request_hash = {}
request_hash[:headers] = headers
request_hash[:params] = params
uri = url(method)
unless request_hash[:params].empty?
query_string = request_hash[:params].collect { |k, v| "#{k.to_s}=#{CGI::escape(v.to_s)}" }.join('&')
uri += "?#{query_string}"
end
IronCore::Logger.debug 'IronCore', "Streaming GET #{uri} with params='#{request_hash.to_s}'"
req = URI(uri)
Net::HTTP.start(req.hostname, req.port, :use_ssl => (req.scheme == 'https')) do |http|
http.request_get(req, request_hash[:headers]) do |res|
res.read_body do |chunk|
yield(chunk)
end
end
end
end
def parse_response(response, parse_json = true)
IronCore::Logger.debug 'IronCore', "GOT #{response.code} with params='#{response.body}'"
raise IronCore::ResponseError.new(response) if (response.code < 200 || response.code >= 300)
body = String.new(response.body)
return body unless parse_json
JSON.parse(body)
end
def check_id(id, name = 'id', length = 24)
if (not id.is_a?(String)) || id.length != length
IronCore::Logger.error 'IronCore', "Expecting #{length} symbol #{name} string", IronCore::Error
end
end
def raise_keystone_config_error(missing)
IronCore::Logger.error 'IronCore', "Keystone keys missing: #{missing}", IronCore::Error
raise IronCore::ConfigurationError.new("Keystone keys missing: #{missing}")
end
end
end