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 



166
167
168
 
# File 'lib/api_consumer.rb', line 166

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

.connection(connection_flag = :normal) ⇒ Object 



144
145
146
147
148
 
# File 'lib/api_consumer.rb', line 144

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 



150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
 
# File 'lib/api_consumer.rb', line 150

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 



88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
 
# File 'lib/api_consumer.rb', line 88

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 



12
13
14
15
16
17
18
19
20
21
22
 
# File 'lib/api_consumer.rb', line 12

def inherited(subclass)
  if File.exist?("config/#{snake_case(subclass)}.yml")
    yml_template = ERB.new File.new("config/#{snake_case(subclass)}.yml").read
    configs = YAML.load yml_template.result(binding)
    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 



29
30
31
 
# File 'lib/api_consumer.rb', line 29

def log
  @logger
end

.memcache? ⇒ Boolean

Returns:

  • (Boolean) 


55
56
57
 
# File 'lib/api_consumer.rb', line 55

def memcache?
  settings[:use_memcache]
end

.memcache_hosts ⇒ Object 



59
60
61
 
# File 'lib/api_consumer.rb', line 59

def memcache_hosts
  settings[:memcache_hosts]
end

.memcache_settings ⇒ Object 



63
64
65
66
67
68
69
 
# File 'lib/api_consumer.rb', line 63

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 



71
72
73
 
# File 'lib/api_consumer.rb', line 71

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

.set_log_level(level = nil) ⇒ Object 



33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
 
# File 'lib/api_consumer.rb', line 33

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 



24
25
26
27
 
# File 'lib/api_consumer.rb', line 24

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

.settings ⇒ Object 



75
76
77
 
# File 'lib/api_consumer.rb', line 75

def settings
  @settings ||= {}
end