Class: APIConsumer

Inherits:
Object
  • Object
show all
Defined in:
lib/api_consumer.rb

Constant Summary collapse

DEFAULT_REQUEST_OPTS = 
{
  :method => :get,
  :headers => {
    "Accept" => "application/json",
    "Content-Type" => "application/json",
    "User-Agent" => "API-CONSUMER-#{ENV['RACK_ENV'] || 'dev'}"
  },
  :ttl => 300
}

Class Method Summary collapse

Class Method Details

.cache ⇒ Object 



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# File 'lib/api_consumer.rb', line 164

def cache
  @cache ||= UberCache.new(settings[:cache_prefix], settings[:memcache_hosts], memcache_settings)
end

.connection(connection_flag = :normal) ⇒ Object 



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# File 'lib/api_consumer.rb', line 142

def connection(connection_flag = :normal)
  @connections ||= {}
  return @connections[connection_flag] if @connections[connection_flag]
  @connections[connection_flag] = create_connection
end

.create_connection(debug = false) ⇒ Object 



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# File 'lib/api_consumer.rb', line 148

def create_connection(debug = false)
  if @uri.nil? || @uri.port.nil?
    log.info "CONNECTING TO: #{settings[:url]}"
    @uri = URI.parse("#{settings[:url]}/")
  end
  http = Net::HTTP.new(@uri.host, @uri.port)
  if settings[:ssl] == true
    http.use_ssl = true
    http.verify_mode = OpenSSL::SSL::VERIFY_NONE
  end
  http.set_debug_output $stderr if debug
  http.open_timeout = 7
  http.read_timeout = 15
  http
end

.do_request(path, conn, opts = {}, &blk) ⇒ Object 



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# File 'lib/api_consumer.rb', line 86

def do_request(path, conn, opts = {}, &blk)
  if(opts[:verbose])
    log.debug("Sending request to: #{conn.address}#{':' + conn.port.to_s if conn.port}#{path}")
  end
  if opts[:key] # cache if key sent
    read_val = nil
    return read_val if !opts[:reload] && read_val = cache.obj_read(opts[:key])
    opts[:ttl] ||= settings[:ttl] || DEFAULT_REQUEST_OPTS[:ttl]
  end
  opts[:headers] = DEFAULT_REQUEST_OPTS[:headers].merge(opts[:headers] || {})
  opts[:method] = opts[:method] || DEFAULT_REQUEST_OPTS[:method]

  path = decorate_path( path )
  req = if( opts[:method] == :get)
    Net::HTTP::Get.new(path)
  elsif( opts[:method] == :post)
    Net::HTTP::Post.new(path)
  elsif( opts[:method] == :delete)
    Net::HTTP::Delete.new(path)
  elsif( opts[:method] == :put)
    Net::HTTP::Put.new(path)
  else
    log.error "BUG - method=>(#{opts[:method]})"
  end
  opts[:headers].each { |k,v| req[k] = v }
  settings[:headers].each { |k,v| req[k] = v } if settings[:headers]
  req.basic_auth settings[:api_user], settings[:api_password] if settings[:api_user] && settings[:api_password]
  #req["connection"] = 'keep-alive'
  req.body = opts[:body] if opts[:body]

  response = nil
  begin
    log.debug "CONN:" + conn.inspect
    log.debug "REQ:" + req.inspect
    response = conn.request(req)
    
    results = JSON.parse(response.body)
    accept_codes = [200, 201, 202]
    accept_codes += settings[:accept_codes].map(&:to_i) if settings[:accept_codes]
    if !accept_codes.include?(response.code.to_i)
      results = error_code(response.code, opts[:errors], results)
    end
    results = blk.call(results) if blk
    cache.obj_write(opts[:key], results, :ttl => opts[:ttl]) if opts[:key]
    return results
  rescue Exception => exception
    log.error exception.message
    log.error exception.backtrace        
    return error_code(response ? response.code : "NO CODE" , opts[:errors])
  end
  data = response.body
  data = blk.call(data) if blk
  cache.obj_write(opts[:key], data, :ttl => opts[:ttl]) if opts[:key]
  return data
end

.inherited(subclass) ⇒ Object 



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# File 'lib/api_consumer.rb', line 11

def inherited(subclass)
  if File.exist?("config/#{snake_case(subclass)}.yml")
    configs = YAML.load_file("config/#{snake_case(subclass)}.yml")
    configs[snake_case(subclass)].each{ |k,v| subclass.set(k.to_sym, v) }
    subclass.set_logger(Logger.new(subclass.settings[:log_file] || "./log/#{snake_case(subclass)}_api.log"), subclass.settings[:log_level])
    super
  else
    raise RuntimeError, "Please create config file: 'config/#{snake_case(subclass)}.yml'"
  end
end

.log ⇒ Object 



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# File 'lib/api_consumer.rb', line 27

def log
  @logger
end

.memcache? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/api_consumer.rb', line 53

def memcache?
  settings[:use_memcache]
end

.memcache_hosts ⇒ Object 



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# File 'lib/api_consumer.rb', line 57

def memcache_hosts
  settings[:memcache_hosts]
end

.memcache_settings ⇒ Object 



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# File 'lib/api_consumer.rb', line 61

def memcache_settings
  mem_settings = (settings[:memcache_settings] || {})
  mem_settings.keys.each do |key|
    mem_settings[(key.to_sym rescue key) || key] = mem_settings.delete(key)
  end
  mem_settings
end

.set(key, val) ⇒ Object 



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# File 'lib/api_consumer.rb', line 69

def set(key, val)
  settings[key] = val
end

.set_log_level(level = nil) ⇒ Object 



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# File 'lib/api_consumer.rb', line 31

def set_log_level(level=nil)
  if level.nil?
    level = if([nil, "development", "test"].include?(ENV['RACK_ENV']))
      :info
    else
      :warn
    end
  end
  @logger.level = case level.to_sym
  when :debug
    Logger::DEBUG
  when :info
    Logger::INFO
  when :error
    Logger::ERROR
  when :fatal
    Logger::FATAL
  else #warn
    Logger::WARN
  end
end

.set_logger(logger, level = nil) ⇒ Object 



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# File 'lib/api_consumer.rb', line 22

def set_logger(logger, level=nil)
  @logger = logger.nil? ? Logger.new(STDERR) : logger
  set_log_level(level)
end

.settings ⇒ Object 



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# File 'lib/api_consumer.rb', line 73

def settings
  @settings ||= {}
end