Class: LogStash::Filters::Http

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

Overview

Logstash HTTP Filter This filter calls a defined URL and saves the answer into a specified field.

Constant Summary collapse

VALID_VERBS = 
['GET', 'HEAD', 'PATCH', 'DELETE', 'POST']

Instance Method Summary collapse

Instance Method Details

#filter(event) ⇒ Object 



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# File 'lib/logstash/filters/http.rb', line 37

def filter(event)
  url_for_event = event.sprintf(@url)
  headers_sprintfed = sprintf_object(event, @headers)
  if body_format == "json"
    headers_sprintfed["content-type"] = "application/json"
  else
    headers_sprintfed["content-type"] = "text/plain"
  end
  query_sprintfed = sprintf_object(event, @query)
  body_sprintfed = sprintf_object(event, @body)
  # we don't need to serialize strings and numbers
  if @body_format == "json" && body_sprintfed.kind_of?(Enumerable)
    body_sprintfed = LogStash::Json.dump(body_sprintfed)
  end

  options = { :headers => headers_sprintfed, :query => query_sprintfed, :body => body_sprintfed }

  @logger.debug? && @logger.debug('processing request', :url => url_for_event, :headers => headers_sprintfed, :query => query_sprintfed)
  client_error = nil

  begin
    code, response_headers, response_body = request_http(@verb, url_for_event, options)
  rescue => e
    client_error = e
  end

  if client_error
    @logger.error('error during HTTP request',
                  :url => url_for_event, :body => body_sprintfed,
                  :client_error => client_error.message)
    @tag_on_request_failure.each { |tag| event.tag(tag) }
  elsif !code.between?(200, 299)
    @logger.error('error during HTTP request',
                  :url => url_for_event, :code => code,
                  :response => response_body)
    @tag_on_request_failure.each { |tag| event.tag(tag) }
  else
    @logger.debug? && @logger.debug('success received',
                                    :code => code, :body => response_body)
    process_response(response_body, response_headers, event)
    filter_matched(event)
  end
end

#register ⇒ Object 



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# File 'lib/logstash/filters/http.rb', line 32

def register
  # nothing to see here
  @verb = verb.downcase
end