Class: LogStash::Outputs::Http

Inherits:
Base
  • Object
show all
Includes:
PluginMixins::HttpClient
Defined in:
lib/logstash/outputs/http.rb

Defined Under Namespace

Classes: RetryTimerTask

Constant Summary collapse

VALID_METHODS = 
["put", "post", "patch", "delete", "get", "head"]
RETRYABLE_MANTICORE_EXCEPTIONS = 
[
  ::Manticore::Timeout,
  ::Manticore::SocketException,
  ::Manticore::ClientProtocolException, 
  ::Manticore::ResolutionFailure, 
  ::Manticore::SocketTimeout
]

Instance Method Summary collapse

Instance Method Details

#close ⇒ Object 



261
262
263
264
 
# File 'lib/logstash/outputs/http.rb', line 261

def close
  @timer.cancel
  client.close
end

#multi_receive(events) ⇒ Object

def register



111
112
113
 
# File 'lib/logstash/outputs/http.rb', line 111

def multi_receive(events)
  send_events(events)
end

#register ⇒ Object 



85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
 
# File 'lib/logstash/outputs/http.rb', line 85

def register
  @http_method = @http_method.to_sym

  # We count outstanding requests with this queue
  # This queue tracks the requests to create backpressure
  # When this queue is empty no new requests may be sent,
  # tokens must be added back by the client on success
  @request_tokens = SizedQueue.new(@pool_max)
  @pool_max.times {|t| @request_tokens << true }

  @requests = Array.new

  if @content_type.nil?
    case @format
      when "form" ; @content_type = "application/x-www-form-urlencoded"
      when "json" ; @content_type = "application/json"
      when "message" ; @content_type = "text/plain"
    end
  end

  validate_format!
  
  # Run named Timer as daemon thread
  @timer = java.util.Timer.new("HTTP Output #{self.params['id']}", true)
end

#send_event(event, attempt) ⇒ Object 



192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
 
# File 'lib/logstash/outputs/http.rb', line 192

def send_event(event, attempt)
  body = event_body(event)

  # Send the request
  url = event.sprintf(@url)
  headers = event_headers(event)

  # Create an async request
  request = client.background.send(@http_method, url, :body => body, :headers => headers)
  request.call # Actually invoke the request in the background

  request.on_success do |response|
    begin
      if !response_success?(response)
        will_retry = retryable_response?(response)
        log_failure(
          "Encountered non-2xx HTTP code #{response.code}",
          :response_code => response.code,
          :url => url,
          :event => event,
          :will_retry => will_retry
        )
        
        if will_retry 
          yield :retry, event, attempt
        else
          yield :failure, event, attempt
        end
      else
        yield :success, event, attempt
      end
    rescue => e 
      # Shouldn't ever happen
      @logger.error("Unexpected error in request success!",
        :class => e.class.name,
        :message => e.message,
        :backtrace => e.backtrace)
    end
  end

  request.on_failure do |exception|
    begin 
      will_retry = retryable_exception?(exception)
      log_failure("Could not fetch URL",
                  :url => url,
                  :method => @http_method,
                  :body => body,
                  :headers => headers,
                  :message => exception.message,
                  :class => exception.class.name,
                  :backtrace => exception.backtrace,
                  :will_retry => will_retry
      )
      
      if will_retry
        yield :retry, event, attempt
      else
        yield :failure, event, attempt
      end
    rescue => e 
      # Shouldn't ever happen
      @logger.error("Unexpected error in request failure!",
        :class => e.class.name,
        :message => e.message,
        :backtrace => e.backtrace)
      end
  end
end

#send_events(events) ⇒ Object 



128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
 
# File 'lib/logstash/outputs/http.rb', line 128

def send_events(events)
  successes = java.util.concurrent.atomic.AtomicInteger.new(0)
  failures  = java.util.concurrent.atomic.AtomicInteger.new(0)
  retries = java.util.concurrent.atomic.AtomicInteger.new(0)
  
  pending = Queue.new
  events.each {|e| pending << [e, 0]}
  
  while popped = pending.pop
    break if popped == :done
    
    event, attempt = popped
    
    send_event(event, attempt) do |action,event,attempt|
      begin 
        action = :failure if action == :retry && !@retry_failed
        
        case action
        when :success
          successes.incrementAndGet
        when :retry
          retries.incrementAndGet
          
          next_attempt = attempt+1
          sleep_for = sleep_for_attempt(next_attempt)
          @logger.info("Retrying http request, will sleep for #{sleep_for} seconds")
          timer_task = RetryTimerTask.new(pending, event, next_attempt)
          @timer.schedule(timer_task, sleep_for*1000)
        when :failure 
          failures.incrementAndGet
        else
          raise "Unknown action #{action}"
        end
        
        if action == :success || action == :failure 
          if successes.get+failures.get == events.size
            pending << :done
          end
        end
      rescue => e 
        # This should never happen unless there's a flat out bug in the code
        @logger.error("Error sending HTTP Request",
          :class => e.class.name,
          :message => e.message,
          :backtrace => e.backtrace)
        failures.incrementAndGet
        raise e
      end
    end
  end
rescue => e
  @logger.error("Error in http output loop",
          :class => e.class.name,
          :message => e.message,
          :backtrace => e.backtrace)
  raise e
end

#sleep_for_attempt(attempt) ⇒ Object 



186
187
188
189
190
 
# File 'lib/logstash/outputs/http.rb', line 186

def sleep_for_attempt(attempt)
  sleep_for = attempt**2
  sleep_for = sleep_for <= 60 ? sleep_for : 60
  (sleep_for/2) + (rand(0..sleep_for)/2)
end